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* [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion
@ 2019-10-01 22:13 Linus Walleij
  2019-10-01 22:13 ` [PATCH 1/7 v3] power: supply: ab8500_btemp: convert to IIO ADC Linus Walleij
                   ` (7 more replies)
  0 siblings, 8 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij

This version should cover Jonathans comments on v2 and
be ripe for early merge for v5.5.

Jonathan, do you want to queue them in your tree?

When Lee applies series like this he usually puts them
on an isolated immutable branch that he then pulls
into his own tree and offer to other subsystems.
It's a good idea I think but maybe you have other
ways of working.

Linus Walleij (7):
  power: supply: ab8500_btemp: convert to IIO ADC
  power: supply: ab8500_charger: convert to IIO ADC
  power: supply: ab8500_fg: convert to IIO ADC
  hwmon: ab8500: convert to IIO ADC
  mfd: ab8500: augment DT bindings
  iio: adc: New driver for the AB8500 GPADC
  mfd: Switch the AB8500 GPADC to IIO

 .../devicetree/bindings/mfd/ab8500.txt        |  119 ++
 MAINTAINERS                                   |    1 +
 drivers/hwmon/Kconfig                         |    3 +-
 drivers/hwmon/ab8500.c                        |   65 +-
 drivers/iio/adc/Kconfig                       |   10 +
 drivers/iio/adc/Makefile                      |    1 +
 drivers/iio/adc/ab8500-gpadc.c                | 1218 +++++++++++++++++
 drivers/mfd/Kconfig                           |    7 -
 drivers/mfd/Makefile                          |    1 -
 drivers/mfd/ab8500-debugfs.c                  |  715 ----------
 drivers/mfd/ab8500-gpadc.c                    | 1075 ---------------
 drivers/power/supply/Kconfig                  |    2 +-
 drivers/power/supply/ab8500_btemp.c           |   41 +-
 drivers/power/supply/ab8500_charger.c         |   78 +-
 drivers/power/supply/ab8500_fg.c              |   23 +-
 include/linux/mfd/abx500/ab8500-gpadc.h       |   75 -
 16 files changed, 1495 insertions(+), 1939 deletions(-)
 create mode 100644 drivers/iio/adc/ab8500-gpadc.c
 delete mode 100644 drivers/mfd/ab8500-gpadc.c
 delete mode 100644 include/linux/mfd/abx500/ab8500-gpadc.h

-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 1/7 v3] power: supply: ab8500_btemp: convert to IIO ADC
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
@ 2019-10-01 22:13 ` Linus Walleij
  2019-10-01 22:13 ` [PATCH 2/7 v3] power: supply: ab8500_charger: " Linus Walleij
                   ` (6 subsequent siblings)
  7 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij, Sebastian Reichel

This switches the AB8500 battery temperature driver to using
the standard IIO ADC channel lookup and conversion routines.

Acked-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Make Kconfig entry depend on (IIO = y) as we need it
  compiled-in.
- Rebased on v5.4-rc1
ChangeLog v1->v2:
- Collected ACKs.
- Add a Kconfig dependency on IIO
- Fixed some whitespace issues
- Rebased on v5.3-rc5

This will be applied along with the other changes in ARM
SoC and should not be applied to the power tree right now.
---
 drivers/power/supply/Kconfig        |  2 +-
 drivers/power/supply/ab8500_btemp.c | 41 ++++++++++++++++++++---------
 2 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index c84a7b1caeb6..27164a1d3c7c 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -629,7 +629,7 @@ config BATTERY_GAUGE_LTC2941
 
 config AB8500_BM
 	bool "AB8500 Battery Management Driver"
-	depends on AB8500_CORE && AB8500_GPADC
+	depends on AB8500_CORE && AB8500_GPADC && (IIO = y)
 	help
 	  Say Y to include support for AB8500 battery management.
 
diff --git a/drivers/power/supply/ab8500_btemp.c b/drivers/power/supply/ab8500_btemp.c
index 8fe81259bfd9..ad8c51ef8b8b 100644
--- a/drivers/power/supply/ab8500_btemp.c
+++ b/drivers/power/supply/ab8500_btemp.c
@@ -26,7 +26,7 @@
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/abx500/ab8500-bm.h>
-#include <linux/mfd/abx500/ab8500-gpadc.h>
+#include <linux/iio/consumer.h>
 
 #define VTVOUT_V			1800
 
@@ -79,7 +79,8 @@ struct ab8500_btemp_ranges {
  * @bat_temp:		Dispatched battery temperature in degree Celsius
  * @prev_bat_temp	Last measured battery temperature in degree Celsius
  * @parent:		Pointer to the struct ab8500
- * @gpadc:		Pointer to the struct gpadc
+ * @adc_btemp_ball:	ADC channel for the battery ball temperature
+ * @adc_bat_ctrl:	ADC channel for the battery control
  * @fg:			Pointer to the struct fg
  * @bm:           	Platform specific battery management information
  * @btemp_psy:		Structure for BTEMP specific battery properties
@@ -96,7 +97,8 @@ struct ab8500_btemp {
 	int bat_temp;
 	int prev_bat_temp;
 	struct ab8500 *parent;
-	struct ab8500_gpadc *gpadc;
+	struct iio_channel *btemp_ball;
+	struct iio_channel *bat_ctrl;
 	struct ab8500_fg *fg;
 	struct abx500_bm_data *bm;
 	struct power_supply *btemp_psy;
@@ -177,13 +179,13 @@ static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di,
  */
 static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di)
 {
-	int vbtemp;
+	int vbtemp, ret;
 	static int prev;
 
-	vbtemp = ab8500_gpadc_convert(di->gpadc, BAT_CTRL);
-	if (vbtemp < 0) {
+	ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp);
+	if (ret < 0) {
 		dev_err(di->dev,
-			"%s gpadc conversion failed, using previous value",
+			"%s ADC conversion failed, using previous value",
 			__func__);
 		return prev;
 	}
@@ -455,7 +457,7 @@ static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di,
  */
 static int ab8500_btemp_measure_temp(struct ab8500_btemp *di)
 {
-	int temp;
+	int temp, ret;
 	static int prev;
 	int rbat, rntc, vntc;
 	u8 id;
@@ -480,10 +482,10 @@ static int ab8500_btemp_measure_temp(struct ab8500_btemp *di)
 			di->bm->bat_type[id].r_to_t_tbl,
 			di->bm->bat_type[id].n_temp_tbl_elements, rbat);
 	} else {
-		vntc = ab8500_gpadc_convert(di->gpadc, BTEMP_BALL);
-		if (vntc < 0) {
+		ret = iio_read_channel_processed(di->btemp_ball, &vntc);
+		if (ret < 0) {
 			dev_err(di->dev,
-				"%s gpadc conversion failed,"
+				"%s ADC conversion failed,"
 				" using previous value\n", __func__);
 			return prev;
 		}
@@ -1024,7 +1026,22 @@ static int ab8500_btemp_probe(struct platform_device *pdev)
 	/* get parent data */
 	di->dev = &pdev->dev;
 	di->parent = dev_get_drvdata(pdev->dev.parent);
-	di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
+
+	/* Get ADC channels */
+	di->btemp_ball = devm_iio_channel_get(&pdev->dev, "btemp_ball");
+	if (IS_ERR(di->btemp_ball)) {
+		if (PTR_ERR(di->btemp_ball) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get BTEMP BALL ADC channel\n");
+		return PTR_ERR(di->btemp_ball);
+	}
+	di->bat_ctrl = devm_iio_channel_get(&pdev->dev, "bat_ctrl");
+	if (IS_ERR(di->bat_ctrl)) {
+		if (PTR_ERR(di->bat_ctrl) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get BAT CTRL ADC channel\n");
+		return PTR_ERR(di->bat_ctrl);
+	}
 
 	di->initialized = false;
 
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 2/7 v3] power: supply: ab8500_charger: convert to IIO ADC
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
  2019-10-01 22:13 ` [PATCH 1/7 v3] power: supply: ab8500_btemp: convert to IIO ADC Linus Walleij
@ 2019-10-01 22:13 ` " Linus Walleij
  2019-10-01 22:13 ` [PATCH 3/7 v3] power: supply: ab8500_fg: " Linus Walleij
                   ` (5 subsequent siblings)
  7 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij, Sebastian Reichel

This switches the AB8500 battery charger driver to using
the standard IIO ADC channel lookup and conversion routines.

Acked-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Rebased on v5.4-rc1
ChangeLog v1->v2:
- Collected ACKs.
- Rebased on v5.3-rc5
- Fixed some whitespace issues
This will be applied along with the other changes in ARM
SoC and should not be applied to the power tree right now.
---
 drivers/power/supply/ab8500_charger.c | 78 ++++++++++++++++++++-------
 1 file changed, 58 insertions(+), 20 deletions(-)

diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index e51d0e72beea..c053ede47eb2 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -29,10 +29,10 @@
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500-bm.h>
-#include <linux/mfd/abx500/ab8500-gpadc.h>
 #include <linux/mfd/abx500/ux500_chargalg.h>
 #include <linux/usb/otg.h>
 #include <linux/mutex.h>
+#include <linux/iio/consumer.h>
 
 /* Charger constants */
 #define NO_PW_CONN			0
@@ -233,7 +233,10 @@ struct ab8500_charger_max_usb_in_curr {
  * @current_stepping_sessions:
  *			Counter for current stepping sessions
  * @parent:		Pointer to the struct ab8500
- * @gpadc:		Pointer to the struct gpadc
+ * @adc_main_charger_v	ADC channel for main charger voltage
+ * @adc_main_charger_c	ADC channel for main charger current
+ * @adc_vbus_v		ADC channel for USB charger voltage
+ * @adc_usb_charger_c	ADC channel for USB charger current
  * @bm:           	Platform specific battery management information
  * @flags:		Structure for information about events triggered
  * @usb_state:		Structure for usb stack information
@@ -283,7 +286,10 @@ struct ab8500_charger {
 	int is_aca_rid;
 	atomic_t current_stepping_sessions;
 	struct ab8500 *parent;
-	struct ab8500_gpadc *gpadc;
+	struct iio_channel *adc_main_charger_v;
+	struct iio_channel *adc_main_charger_c;
+	struct iio_channel *adc_vbus_v;
+	struct iio_channel *adc_usb_charger_c;
 	struct abx500_bm_data *bm;
 	struct ab8500_charger_event_flags flags;
 	struct ab8500_charger_usb_state usb_state;
@@ -459,13 +465,13 @@ static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
  */
 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
 {
-	int vch;
+	int vch, ret;
 
 	/* Only measure voltage if the charger is connected */
 	if (di->ac.charger_connected) {
-		vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
-		if (vch < 0)
-			dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
+		ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
+		if (ret < 0)
+			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 	} else {
 		vch = 0;
 	}
@@ -510,13 +516,13 @@ static int ab8500_charger_ac_cv(struct ab8500_charger *di)
  */
 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
 {
-	int vch;
+	int vch, ret;
 
 	/* Only measure voltage if the charger is connected */
 	if (di->usb.charger_connected) {
-		vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
-		if (vch < 0)
-			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
+		ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
+		if (ret < 0)
+			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 	} else {
 		vch = 0;
 	}
@@ -532,13 +538,13 @@ static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
  */
 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
 {
-	int ich;
+	int ich, ret;
 
 	/* Only measure current if the charger is online */
 	if (di->usb.charger_online) {
-		ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
-		if (ich < 0)
-			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
+		ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
+		if (ret < 0)
+			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 	} else {
 		ich = 0;
 	}
@@ -554,13 +560,13 @@ static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
  */
 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
 {
-	int ich;
+	int ich, ret;
 
 	/* Only measure current if the charger is online */
 	if (di->ac.charger_online) {
-		ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
-		if (ich < 0)
-			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
+		ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
+		if (ret < 0)
+			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 	} else {
 		ich = 0;
 	}
@@ -3371,7 +3377,39 @@ static int ab8500_charger_probe(struct platform_device *pdev)
 	/* get parent data */
 	di->dev = &pdev->dev;
 	di->parent = dev_get_drvdata(pdev->dev.parent);
-	di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
+
+	/* Get ADC channels */
+	di->adc_main_charger_v = devm_iio_channel_get(&pdev->dev,
+						      "main_charger_v");
+	if (IS_ERR(di->adc_main_charger_v)) {
+		if (PTR_ERR(di->adc_main_charger_v) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get ADC main charger voltage\n");
+		return PTR_ERR(di->adc_main_charger_v);
+	}
+	di->adc_main_charger_c = devm_iio_channel_get(&pdev->dev,
+						      "main_charger_c");
+	if (IS_ERR(di->adc_main_charger_c)) {
+		if (PTR_ERR(di->adc_main_charger_c) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get ADC main charger current\n");
+		return PTR_ERR(di->adc_main_charger_v);
+	}
+	di->adc_vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
+	if (IS_ERR(di->adc_vbus_v)) {
+		if (PTR_ERR(di->adc_vbus_v) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get ADC USB charger voltage\n");
+		return PTR_ERR(di->adc_vbus_v);
+	}
+	di->adc_usb_charger_c = devm_iio_channel_get(&pdev->dev,
+						     "usb_charger_c");
+	if (IS_ERR(di->adc_usb_charger_c)) {
+		if (PTR_ERR(di->adc_usb_charger_c) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get ADC USB charger current\n");
+		return PTR_ERR(di->adc_usb_charger_c);
+	}
 
 	/* initialize lock */
 	spin_lock_init(&di->usb_state.usb_lock);
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 3/7 v3] power: supply: ab8500_fg: convert to IIO ADC
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
  2019-10-01 22:13 ` [PATCH 1/7 v3] power: supply: ab8500_btemp: convert to IIO ADC Linus Walleij
  2019-10-01 22:13 ` [PATCH 2/7 v3] power: supply: ab8500_charger: " Linus Walleij
@ 2019-10-01 22:13 ` " Linus Walleij
  2019-10-01 22:13 ` [PATCH 4/7 v3] hwmon: ab8500: " Linus Walleij
                   ` (4 subsequent siblings)
  7 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij, Sebastian Reichel

This switches the AB8500 fuel gauge driver to using
the standard IIO ADC channel lookup and conversion routines.

Acked-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Rebased on v5.4-rc1
ChangeLog v1->v2:
- Collected ACKs.
- Rebased on v5.3-rc5
- Fixed some whitespace issues

This will be applied along with the other changes in ARM
SoC and should not be applied to the power tree right now.
---
 drivers/power/supply/ab8500_fg.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c
index 6fc4bc30644c..f7909dfd3b61 100644
--- a/drivers/power/supply/ab8500_fg.c
+++ b/drivers/power/supply/ab8500_fg.c
@@ -32,7 +32,7 @@
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/abx500/ab8500-bm.h>
-#include <linux/mfd/abx500/ab8500-gpadc.h>
+#include <linux/iio/consumer.h>
 #include <linux/kernel.h>
 
 #define MILLI_TO_MICRO			1000
@@ -182,7 +182,7 @@ struct inst_curr_result_list {
  * @bat_cap:		Structure for battery capacity specific parameters
  * @avg_cap:		Average capacity filter
  * @parent:		Pointer to the struct ab8500
- * @gpadc:		Pointer to the struct gpadc
+ * @main_bat_v:		ADC channel for the main battery voltage
  * @bm:           	Platform specific battery management information
  * @fg_psy:		Structure that holds the FG specific battery properties
  * @fg_wq:		Work queue for running the FG algorithm
@@ -224,7 +224,7 @@ struct ab8500_fg {
 	struct ab8500_fg_battery_capacity bat_cap;
 	struct ab8500_fg_avg_cap avg_cap;
 	struct ab8500 *parent;
-	struct ab8500_gpadc *gpadc;
+	struct iio_channel *main_bat_v;
 	struct abx500_bm_data *bm;
 	struct power_supply *fg_psy;
 	struct workqueue_struct *fg_wq;
@@ -829,13 +829,13 @@ static void ab8500_fg_acc_cur_work(struct work_struct *work)
  */
 static int ab8500_fg_bat_voltage(struct ab8500_fg *di)
 {
-	int vbat;
+	int vbat, ret;
 	static int prev;
 
-	vbat = ab8500_gpadc_convert(di->gpadc, MAIN_BAT_V);
-	if (vbat < 0) {
+	ret = iio_read_channel_processed(di->main_bat_v, &vbat);
+	if (ret < 0) {
 		dev_err(di->dev,
-			"%s gpadc conversion failed, using previous value\n",
+			"%s ADC conversion failed, using previous value\n",
 			__func__);
 		return prev;
 	}
@@ -3066,7 +3066,14 @@ static int ab8500_fg_probe(struct platform_device *pdev)
 	/* get parent data */
 	di->dev = &pdev->dev;
 	di->parent = dev_get_drvdata(pdev->dev.parent);
-	di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
+
+	di->main_bat_v = devm_iio_channel_get(&pdev->dev, "main_bat_v");
+	if (IS_ERR(di->main_bat_v)) {
+		if (PTR_ERR(di->main_bat_v) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "failed to get main battery ADC channel\n");
+		return PTR_ERR(di->main_bat_v);
+	}
 
 	psy_cfg.supplied_to = supply_interface;
 	psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 4/7 v3] hwmon: ab8500: convert to IIO ADC
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
                   ` (2 preceding siblings ...)
  2019-10-01 22:13 ` [PATCH 3/7 v3] power: supply: ab8500_fg: " Linus Walleij
@ 2019-10-01 22:13 ` " Linus Walleij
  2019-10-01 22:13 ` [PATCH 5/7 v3] mfd: ab8500: augment DT bindings Linus Walleij
                   ` (3 subsequent siblings)
  7 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij, Guenter Roeck

This switches the AB8500 hardware monitor driver to using
the standard IIO ADC channel lookup and conversion routines.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Depend on (IIO = y) since we are bool and need it compiled
  in.
- Rebased on v5.4-rc1
ChangeLog v1->v2:
- Collected ACKs.
- Rebased on v5.3-rc5
- Add a Kconfig dependency on IIO
- Fix some whitespace issues

This should not be applied to the hwmon tree right now, it
will be applied along with the other changes in ARM SoC.
---
 drivers/hwmon/Kconfig  |  3 +-
 drivers/hwmon/ab8500.c | 65 ++++++++++++++++++++++++++----------------
 2 files changed, 43 insertions(+), 25 deletions(-)

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 13a6b4afb4b3..5308c59d7001 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -40,7 +40,8 @@ comment "Native drivers"
 
 config SENSORS_AB8500
 	tristate "AB8500 thermal monitoring"
-	depends on AB8500_GPADC && AB8500_BM
+	depends on AB8500_GPADC && AB8500_BM && (IIO = y)
+	default n
 	help
 	  If you say yes here you get support for the thermal sensor part
 	  of the AB8500 chip. The driver includes thermal management for
diff --git a/drivers/hwmon/ab8500.c b/drivers/hwmon/ab8500.c
index 207f77f85a40..53f3379d799d 100644
--- a/drivers/hwmon/ab8500.c
+++ b/drivers/hwmon/ab8500.c
@@ -17,20 +17,24 @@
 #include <linux/hwmon-sysfs.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500-bm.h>
-#include <linux/mfd/abx500/ab8500-gpadc.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/power/ab8500.h>
 #include <linux/reboot.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>
+#include <linux/iio/consumer.h>
 #include "abx500.h"
 
 #define DEFAULT_POWER_OFF_DELAY	(HZ * 10)
 #define THERMAL_VCC		1800
 #define PULL_UP_RESISTOR	47000
-/* Number of monitored sensors should not greater than NUM_SENSORS */
-#define NUM_MONITORED_SENSORS	4
+
+#define AB8500_SENSOR_AUX1		0
+#define AB8500_SENSOR_AUX2		1
+#define AB8500_SENSOR_BTEMP_BALL	2
+#define AB8500_SENSOR_BAT_CTRL		3
+#define NUM_MONITORED_SENSORS		4
 
 struct ab8500_gpadc_cfg {
 	const struct abx500_res_to_temp *temp_tbl;
@@ -40,7 +44,8 @@ struct ab8500_gpadc_cfg {
 };
 
 struct ab8500_temp {
-	struct ab8500_gpadc *gpadc;
+	struct iio_channel *aux1;
+	struct iio_channel *aux2;
 	struct ab8500_btemp *btemp;
 	struct delayed_work power_off_work;
 	struct ab8500_gpadc_cfg cfg;
@@ -82,15 +87,21 @@ static int ab8500_read_sensor(struct abx500_temp *data, u8 sensor, int *temp)
 	int voltage, ret;
 	struct ab8500_temp *ab8500_data = data->plat_data;
 
-	if (sensor == BAT_CTRL) {
-		*temp = ab8500_btemp_get_batctrl_temp(ab8500_data->btemp);
-	} else if (sensor == BTEMP_BALL) {
+	if (sensor == AB8500_SENSOR_BTEMP_BALL) {
 		*temp = ab8500_btemp_get_temp(ab8500_data->btemp);
-	} else {
-		voltage = ab8500_gpadc_convert(ab8500_data->gpadc, sensor);
-		if (voltage < 0)
-			return voltage;
-
+	} else if (sensor == AB8500_SENSOR_BAT_CTRL) {
+		*temp = ab8500_btemp_get_batctrl_temp(ab8500_data->btemp);
+	} else if (sensor == AB8500_SENSOR_AUX1) {
+		ret = iio_read_channel_processed(ab8500_data->aux1, &voltage);
+		if (ret < 0)
+			return ret;
+		ret = ab8500_voltage_to_temp(&ab8500_data->cfg, voltage, temp);
+		if (ret < 0)
+			return ret;
+	} else if (sensor == AB8500_SENSOR_AUX2) {
+		ret = iio_read_channel_processed(ab8500_data->aux2, &voltage);
+		if (ret < 0)
+			return ret;
 		ret = ab8500_voltage_to_temp(&ab8500_data->cfg, voltage, temp);
 		if (ret < 0)
 			return ret;
@@ -164,10 +175,6 @@ int abx500_hwmon_init(struct abx500_temp *data)
 	if (!ab8500_data)
 		return -ENOMEM;
 
-	ab8500_data->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	if (IS_ERR(ab8500_data->gpadc))
-		return PTR_ERR(ab8500_data->gpadc);
-
 	ab8500_data->btemp = ab8500_btemp_get();
 	if (IS_ERR(ab8500_data->btemp))
 		return PTR_ERR(ab8500_data->btemp);
@@ -181,15 +188,25 @@ int abx500_hwmon_init(struct abx500_temp *data)
 	ab8500_data->cfg.tbl_sz = ab8500_temp_tbl_a_size;
 
 	data->plat_data = ab8500_data;
+	ab8500_data->aux1 = devm_iio_channel_get(&data->pdev->dev, "aux1");
+	if (IS_ERR(ab8500_data->aux1)) {
+		if (PTR_ERR(ab8500_data->aux1) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&data->pdev->dev, "failed to get AUX1 ADC channel\n");
+		return PTR_ERR(ab8500_data->aux1);
+	}
+	ab8500_data->aux2 = devm_iio_channel_get(&data->pdev->dev, "aux2");
+	if (IS_ERR(ab8500_data->aux2)) {
+		if (PTR_ERR(ab8500_data->aux2) == -ENODEV)
+			return -EPROBE_DEFER;
+		dev_err(&data->pdev->dev, "failed to get AUX2 ADC channel\n");
+		return PTR_ERR(ab8500_data->aux2);
+	}
 
-	/*
-	 * ADC_AUX1 and ADC_AUX2, connected to external NTC
-	 * BTEMP_BALL and BAT_CTRL, fixed usage
-	 */
-	data->gpadc_addr[0] = ADC_AUX1;
-	data->gpadc_addr[1] = ADC_AUX2;
-	data->gpadc_addr[2] = BTEMP_BALL;
-	data->gpadc_addr[3] = BAT_CTRL;
+	data->gpadc_addr[0] = AB8500_SENSOR_AUX1;
+	data->gpadc_addr[1] = AB8500_SENSOR_AUX2;
+	data->gpadc_addr[2] = AB8500_SENSOR_BTEMP_BALL;
+	data->gpadc_addr[3] = AB8500_SENSOR_BAT_CTRL;
 	data->monitored_sensors = NUM_MONITORED_SENSORS;
 
 	data->ops.read_sensor = ab8500_read_sensor;
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 5/7 v3] mfd: ab8500: augment DT bindings
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
                   ` (3 preceding siblings ...)
  2019-10-01 22:13 ` [PATCH 4/7 v3] hwmon: ab8500: " Linus Walleij
@ 2019-10-01 22:13 ` Linus Walleij
  2019-10-06 10:57   ` Jonathan Cameron
  2019-10-10 18:39   ` Rob Herring
  2019-10-01 22:13 ` [PATCH 6/7 v3] iio: adc: New driver for the AB8500 GPADC Linus Walleij
                   ` (2 subsequent siblings)
  7 siblings, 2 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij, devicetree

As we migrate the AB8500 GPADC driver to use IIO, we need to augment
the bindings to account for defining the ADC channels in the device
tree.

Cc: devicetree@vger.kernel.org
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Change "adc-channel@" to "channel@" as per preferred notation.
- Add some full stops to the end of sentences.
- Reference the new ADC-specific documentation for channel specifier
  etc.
- Collect Lee's ACK.
- Rebased on v5.4-rc1
ChangeLog v1->v2:
- Rebased on v5.3-rc5
---
 .../devicetree/bindings/mfd/ab8500.txt        | 119 ++++++++++++++++++
 1 file changed, 119 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/ab8500.txt b/Documentation/devicetree/bindings/mfd/ab8500.txt
index cd9e90c5d171..ff517e5d7ee0 100644
--- a/Documentation/devicetree/bindings/mfd/ab8500.txt
+++ b/Documentation/devicetree/bindings/mfd/ab8500.txt
@@ -69,6 +69,18 @@ Required child device properties:
 - compatible             : "stericsson,ab8500-[bm|btemp|charger|fg|gpadc|gpio|ponkey|
                                                pwm|regulator|rtc|sysctrl|usb]";
 
+  A few child devices require ADC channels from the GPADC node. Those follow the
+  standard bindings from iio/iio-bindings.txt and iio/adc/adc.txt
+
+  abx500-temp		 : io-channels "aux1" and "aux2" for measuring external
+			   temperatures.
+  ab8500_fg		 : io-channel "main_bat_v" for measuring main battery voltage,
+  ab8500_btemp		 : io-channels "btemp_ball" and "bat_ctrl" for measuring the
+			   battery voltage.
+  ab8500_charger	 : io-channels "main_charger_v", "main_charger_c", "vbus_v",
+			   "usb_charger_c" for measuring voltage and current of the
+			   different charging supplies.
+
 Optional child device properties:
 - interrupts             : contains the device IRQ(s) using the 2-cell format (see above)
 - interrupt-names        : contains names of IRQ resource in the order in which they were
@@ -102,8 +114,115 @@ ab8500 {
                               39 0x4>;
                 interrupt-names = "HW_CONV_END", "SW_CONV_END";
                 vddadc-supply = <&ab8500_ldo_tvout_reg>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		#io-channel-cells = <1>;
+
+		/* GPADC channels */
+		bat_ctrl: channel@01 {
+			reg = <0x01>;
+		};
+		btemp_ball: channel@02 {
+			reg = <0x02>;
+		};
+		main_charger_v: channel@03 {
+			reg = <0x03>;
+		};
+		acc_detect1: channel@04 {
+			reg = <0x04>;
+		};
+		acc_detect2: channel@05 {
+			reg = <0x05>;
+		};
+		adc_aux1: channel@06 {
+			reg = <0x06>;
+		};
+		adc_aux2: channel@07 {
+			reg = <0x07>;
+		};
+		main_batt_v: channel@08 {
+			reg = <0x08>;
+		};
+		vbus_v: channel@09 {
+			reg = <0x09>;
+		};
+		main_charger_c: channel@0a {
+			reg = <0x0a>;
+		};
+		usb_charger_c: channel@0b {
+			reg = <0x0b>;
+		};
+		bk_bat_v: channel@0c {
+			reg = <0x0c>;
+		};
+		die_temp: channel@0d {
+			reg = <0x0d>;
+		};
+		usb_id: channel@0e {
+			reg = <0x0e>;
+		};
+		xtal_temp: channel@12 {
+			reg = <0x12>;
+		};
+		vbat_true_meas: channel@13 {
+			reg = <0x13>;
+		};
+		bat_ctrl_and_ibat: channel@1c {
+			reg = <0x1c>;
+		};
+		vbat_meas_and_ibat: channel@1d {
+			reg = <0x1d>;
+		};
+		vbat_true_meas_and_ibat: channel@1e {
+			reg = <0x1e>;
+		};
+		bat_temp_and_ibat: channel@1f {
+			reg = <0x1f>;
+		};
         };
 
+	ab8500_temp {
+		compatible = "stericsson,abx500-temp";
+		io-channels = <&gpadc 0x06>,
+			      <&gpadc 0x07>;
+		io-channel-name = "aux1", "aux2";
+	};
+
+	ab8500_battery: ab8500_battery {
+		stericsson,battery-type = "LIPO";
+		thermistor-on-batctrl;
+	};
+
+	ab8500_fg {
+		compatible = "stericsson,ab8500-fg";
+		battery	   = <&ab8500_battery>;
+		io-channels = <&gpadc 0x08>;
+		io-channel-name = "main_bat_v";
+	};
+
+	ab8500_btemp {
+		compatible = "stericsson,ab8500-btemp";
+		battery	   = <&ab8500_battery>;
+		io-channels = <&gpadc 0x02>,
+			      <&gpadc 0x01>;
+		io-channel-name = "btemp_ball",
+				"bat_ctrl";
+	};
+
+	ab8500_charger {
+		compatible	= "stericsson,ab8500-charger";
+		battery		= <&ab8500_battery>;
+		vddadc-supply	= <&ab8500_ldo_tvout_reg>;
+		io-channels = <&gpadc 0x03>,
+			      <&gpadc 0x0a>,
+			      <&gpadc 0x09>,
+			      <&gpadc 0x0b>;
+		io-channel-name = "main_charger_v",
+				"main_charger_c",
+				"vbus_v",
+				"usb_charger_c";
+	};
+
         ab8500-usb {
                 compatible = "stericsson,ab8500-usb";
                 interrupts = < 90 0x4
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 6/7 v3] iio: adc: New driver for the AB8500 GPADC
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
                   ` (4 preceding siblings ...)
  2019-10-01 22:13 ` [PATCH 5/7 v3] mfd: ab8500: augment DT bindings Linus Walleij
@ 2019-10-01 22:13 ` Linus Walleij
  2019-10-01 22:13 ` [PATCH 7/7 v3] mfd: Switch the AB8500 GPADC to IIO Linus Walleij
  2019-10-06 11:00 ` [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Jonathan Cameron
  7 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij, Jonathan Cameron

This is a new driver for the ST-Ericsson AB8500 GPADC, which
replaces the old driver in drivers/mfd/ab8500-gpadc.c and
thus gets rid of another necessarily different custom driver
from the times before IIO existed.

The AB8500 GPADC can convert 10 different channels and these
are used for monitoring voltages in the U8500 chipset, some
are used for battery charging, some for temperature
monitoring.

As this is very core functionality that a lot of drivers
depend on and was formerly compiled in with the AB8500 core
driver, we deafault it to 'y' in Kconfig: it can be compiled
out but it is really not advisible: the platform can
for example overheat if we do.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2 -> v3:
- Add AB8500_GPADC_* prefixes to a few more defines to make them
  unambigous.
- Fix up a kerneldoc header for raw to processed conversion.
- Drop some dev_dbg() things, not much use for these.
- Do not initialized ret to 0 in probe()
- Compress some irq request calls to 80 cols.
- Drop pointless dev_info() at end of probe.
- With the new longer prefixes a lot of lines with especially
  interpolation goes over 80 cols. I chose not to care for
  reasonable readability. We can create a (generic) interpolation
  function/macro but that should be a separate patch.
- Rebased on v5.4-rc1
ChangeLog v1 -> v2:
- Break out the IIO driver into a separate patch just adding
  it instead of moving it in the same patch, this makes it
  easier for the IIO maintainers to review the patch.
- Rename a slew of variables and fix up comment syntax etc.
- Drop the enums for sample numbers 1, 4, 8, 16 just use numerals.
- Use a bool to indicate trigger on falling edge rather than a number.
- Use a bool to indicate hardware conversion on a channel.
- Use an enum for the channels.
- Pass a pointer to the channel config struct instead of overly
  talkative function prototype.
- Use devm_iio_device_register()
- Push the channels into the IIO device, do not keep a separate
  copy of the IIO channels inside the driver state container.
- Do not mark interrupts as shared. They are not shared.
- Remove comments commenting the obvious.
- Add prefixed to definitions and enums to avoid clashes with
  other namespaces and make it obvious where things are coming
  from.
- Drop surplus local variable.
- Drop unused OTP retrieveal function for AB8540.
- Use runtime PM for system PM callbacks.
- Use builtin_platform_driver() for initializing the driver as
  this is a bool menuconfig.
- Fix up processed reads from the ADC: I mistakedly dropped the
  flag indicating we can do processed reads, falling us back to
  just raw reads.
---
 MAINTAINERS                    |    1 +
 drivers/iio/adc/Kconfig        |   10 +
 drivers/iio/adc/Makefile       |    1 +
 drivers/iio/adc/ab8500-gpadc.c | 1218 ++++++++++++++++++++++++++++++++
 4 files changed, 1230 insertions(+)
 create mode 100644 drivers/iio/adc/ab8500-gpadc.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 296de2b51c83..19993e872f26 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2005,6 +2005,7 @@ F:	drivers/dma/ste_dma40*
 F:	drivers/hwspinlock/u8500_hsem.c
 F:	drivers/i2c/busses/i2c-nomadik.c
 F:	drivers/i2c/busses/i2c-stu300.c
+F:	drivers/iio/adc/ab8500-gpadc.c
 F:	drivers/mfd/ab3100*
 F:	drivers/mfd/ab8500*
 F:	drivers/mfd/abx500*
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index f0af3a42f53c..0b21dd405dd5 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -6,6 +6,16 @@
 
 menu "Analog to digital converters"
 
+config AB8500_GPADC
+	bool "ST-Ericsson AB8500 GPADC driver"
+	depends on AB8500_CORE && REGULATOR_AB8500
+	default y
+	help
+	  AB8500 Analog Baseband, mixed signal integrated circuit GPADC
+	  (General Purpose Analog to Digital Converter) driver used to monitor
+	  internal voltages, convert accessory and battery, AC (charger, mains)
+	  and USB voltages integral to the U8500 platform.
+
 config AD_SIGMA_DELTA
 	tristate
 	select IIO_BUFFER
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index ef9cc485fb67..fc1b6ebb0cde 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -4,6 +4,7 @@
 #
 
 # When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_AB8500_GPADC) += ab8500-gpadc.o
 obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
 obj-$(CONFIG_AD7124) += ad7124.o
 obj-$(CONFIG_AD7266) += ad7266.o
diff --git a/drivers/iio/adc/ab8500-gpadc.c b/drivers/iio/adc/ab8500-gpadc.c
new file mode 100644
index 000000000000..fd5b18d7f0c2
--- /dev/null
+++ b/drivers/iio/adc/ab8500-gpadc.c
@@ -0,0 +1,1218 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Arun R Murthy <arun.murthy@stericsson.com>
+ * Author: Daniel Willerud <daniel.willerud@stericsson.com>
+ * Author: Johan Palsson <johan.palsson@stericsson.com>
+ * Author: M'boumba Cedric Madianga
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * AB8500 General Purpose ADC driver. The AB8500 uses reference voltages:
+ * VinVADC, and VADC relative to GND to do its job. It monitors main and backup
+ * battery voltages, AC (mains) voltage, USB cable voltage, as well as voltages
+ * representing the temperature of the chip die and battery, accessory
+ * detection by resistance measurements using relative voltages and GSM burst
+ * information.
+ *
+ * Some of the voltages are measured on external pins on the IC, such as
+ * battery temperature or "ADC aux" 1 and 2. Other voltages are internal rails
+ * from other parts of the ASIC such as main charger voltage, main and battery
+ * backup voltage or USB VBUS voltage. For this reason drivers for other
+ * parts of the system are required to obtain handles to the ADC to do work
+ * for them and the IIO driver provides arbitration among these consumers.
+ */
+#include <linux/init.h>
+#include <linux/bits.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_device.h>
+#include <linux/completion.h>
+#include <linux/regulator/consumer.h>
+#include <linux/random.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/mfd/abx500.h>
+#include <linux/mfd/abx500/ab8500.h>
+
+/* GPADC register offsets and bit definitions */
+
+#define AB8500_GPADC_CTRL1_REG		0x00
+/* GPADC control register 1 bits */
+#define AB8500_GPADC_CTRL1_DISABLE		0x00
+#define AB8500_GPADC_CTRL1_ENABLE		BIT(0)
+#define AB8500_GPADC_CTRL1_TRIG_ENA		BIT(1)
+#define AB8500_GPADC_CTRL1_START_SW_CONV	BIT(2)
+#define AB8500_GPADC_CTRL1_BTEMP_PULL_UP	BIT(3)
+/* 0 = use rising edge, 1 = use falling edge */
+#define AB8500_GPADC_CTRL1_TRIG_EDGE		BIT(4)
+/* 0 = use VTVOUT, 1 = use VRTC as pull-up supply for battery temp NTC */
+#define AB8500_GPADC_CTRL1_PUPSUPSEL		BIT(5)
+#define AB8500_GPADC_CTRL1_BUF_ENA		BIT(6)
+#define AB8500_GPADC_CTRL1_ICHAR_ENA		BIT(7)
+
+#define AB8500_GPADC_CTRL2_REG		0x01
+#define AB8500_GPADC_CTRL3_REG		0x02
+/*
+ * GPADC control register 2 and 3 bits
+ * the bit layout is the same for SW and HW conversion set-up
+ */
+#define AB8500_GPADC_CTRL2_AVG_1		0x00
+#define AB8500_GPADC_CTRL2_AVG_4		BIT(5)
+#define AB8500_GPADC_CTRL2_AVG_8		BIT(6)
+#define AB8500_GPADC_CTRL2_AVG_16		(BIT(5) | BIT(6))
+
+enum ab8500_gpadc_channel {
+	AB8500_GPADC_CHAN_UNUSED = 0x00,
+	AB8500_GPADC_CHAN_BAT_CTRL = 0x01,
+	AB8500_GPADC_CHAN_BAT_TEMP = 0x02,
+	/* This is not used on AB8505 */
+	AB8500_GPADC_CHAN_MAIN_CHARGER = 0x03,
+	AB8500_GPADC_CHAN_ACC_DET_1 = 0x04,
+	AB8500_GPADC_CHAN_ACC_DET_2 = 0x05,
+	AB8500_GPADC_CHAN_ADC_AUX_1 = 0x06,
+	AB8500_GPADC_CHAN_ADC_AUX_2 = 0x07,
+	AB8500_GPADC_CHAN_VBAT_A = 0x08,
+	AB8500_GPADC_CHAN_VBUS = 0x09,
+	AB8500_GPADC_CHAN_MAIN_CHARGER_CURRENT = 0x0a,
+	AB8500_GPADC_CHAN_USB_CHARGER_CURRENT = 0x0b,
+	AB8500_GPADC_CHAN_BACKUP_BAT = 0x0c,
+	/* Only on AB8505 */
+	AB8505_GPADC_CHAN_DIE_TEMP = 0x0d,
+	AB8500_GPADC_CHAN_ID = 0x0e,
+	AB8500_GPADC_CHAN_INTERNAL_TEST_1 = 0x0f,
+	AB8500_GPADC_CHAN_INTERNAL_TEST_2 = 0x10,
+	AB8500_GPADC_CHAN_INTERNAL_TEST_3 = 0x11,
+	/* FIXME: Applicable to all ASIC variants? */
+	AB8500_GPADC_CHAN_XTAL_TEMP = 0x12,
+	AB8500_GPADC_CHAN_VBAT_TRUE_MEAS = 0x13,
+	/* FIXME: Doesn't seem to work with pure AB8500 */
+	AB8500_GPADC_CHAN_BAT_CTRL_AND_IBAT = 0x1c,
+	AB8500_GPADC_CHAN_VBAT_MEAS_AND_IBAT = 0x1d,
+	AB8500_GPADC_CHAN_VBAT_TRUE_MEAS_AND_IBAT = 0x1e,
+	AB8500_GPADC_CHAN_BAT_TEMP_AND_IBAT = 0x1f,
+	/*
+	 * Virtual channel used only for ibat conversion to ampere.
+	 * Battery current conversion (ibat) cannot be requested as a
+	 * single conversion but it is always requested in combination
+	 * with other input requests.
+	 */
+	AB8500_GPADC_CHAN_IBAT_VIRTUAL = 0xFF,
+};
+
+#define AB8500_GPADC_AUTO_TIMER_REG	0x03
+
+#define AB8500_GPADC_STAT_REG		0x04
+#define AB8500_GPADC_STAT_BUSY		BIT(0)
+
+#define AB8500_GPADC_MANDATAL_REG	0x05
+#define AB8500_GPADC_MANDATAH_REG	0x06
+#define AB8500_GPADC_AUTODATAL_REG	0x07
+#define AB8500_GPADC_AUTODATAH_REG	0x08
+#define AB8500_GPADC_MUX_CTRL_REG	0x09
+#define AB8540_GPADC_MANDATA2L_REG	0x09
+#define AB8540_GPADC_MANDATA2H_REG	0x0A
+#define AB8540_GPADC_APEAAX_REG		0x10
+#define AB8540_GPADC_APEAAT_REG		0x11
+#define AB8540_GPADC_APEAAM_REG		0x12
+#define AB8540_GPADC_APEAAH_REG		0x13
+#define AB8540_GPADC_APEAAL_REG		0x14
+
+/*
+ * OTP register offsets
+ * Bank : 0x15
+ */
+#define AB8500_GPADC_CAL_1	0x0F
+#define AB8500_GPADC_CAL_2	0x10
+#define AB8500_GPADC_CAL_3	0x11
+#define AB8500_GPADC_CAL_4	0x12
+#define AB8500_GPADC_CAL_5	0x13
+#define AB8500_GPADC_CAL_6	0x14
+#define AB8500_GPADC_CAL_7	0x15
+/* New calibration for 8540 */
+#define AB8540_GPADC_OTP4_REG_7	0x38
+#define AB8540_GPADC_OTP4_REG_6	0x39
+#define AB8540_GPADC_OTP4_REG_5	0x3A
+
+#define AB8540_GPADC_DIS_ZERO	0x00
+#define AB8540_GPADC_EN_VBIAS_XTAL_TEMP	0x02
+
+/* GPADC constants from AB8500 spec, UM0836 */
+#define AB8500_ADC_RESOLUTION		1024
+#define AB8500_ADC_CH_BTEMP_MIN		0
+#define AB8500_ADC_CH_BTEMP_MAX		1350
+#define AB8500_ADC_CH_DIETEMP_MIN	0
+#define AB8500_ADC_CH_DIETEMP_MAX	1350
+#define AB8500_ADC_CH_CHG_V_MIN		0
+#define AB8500_ADC_CH_CHG_V_MAX		20030
+#define AB8500_ADC_CH_ACCDET2_MIN	0
+#define AB8500_ADC_CH_ACCDET2_MAX	2500
+#define AB8500_ADC_CH_VBAT_MIN		2300
+#define AB8500_ADC_CH_VBAT_MAX		4800
+#define AB8500_ADC_CH_CHG_I_MIN		0
+#define AB8500_ADC_CH_CHG_I_MAX		1500
+#define AB8500_ADC_CH_BKBAT_MIN		0
+#define AB8500_ADC_CH_BKBAT_MAX		3200
+
+/* GPADC constants from AB8540 spec */
+#define AB8500_ADC_CH_IBAT_MIN		(-6000) /* mA range measured by ADC for ibat */
+#define AB8500_ADC_CH_IBAT_MAX		6000
+#define AB8500_ADC_CH_IBAT_MIN_V	(-60)	/* mV range measured by ADC for ibat */
+#define AB8500_ADC_CH_IBAT_MAX_V	60
+#define AB8500_GPADC_IBAT_VDROP_L	(-56)  /* mV */
+#define AB8500_GPADC_IBAT_VDROP_H	56
+
+/* This is used to not lose precision when dividing to get gain and offset */
+#define AB8500_GPADC_CALIB_SCALE	1000
+/*
+ * Number of bits shift used to not lose precision
+ * when dividing to get ibat gain.
+ */
+#define AB8500_GPADC_CALIB_SHIFT_IBAT	20
+
+/* Time in ms before disabling regulator */
+#define AB8500_GPADC_AUTOSUSPEND_DELAY	1
+
+#define AB8500_GPADC_CONVERSION_TIME	500 /* ms */
+
+enum ab8500_cal_channels {
+	AB8500_CAL_VMAIN = 0,
+	AB8500_CAL_BTEMP,
+	AB8500_CAL_VBAT,
+	AB8500_CAL_IBAT,
+	AB8500_CAL_NR,
+};
+
+/**
+ * struct ab8500_adc_cal_data - Table for storing gain and offset for the
+ * calibrated ADC channels
+ * @gain: Gain of the ADC channel
+ * @offset: Offset of the ADC channel
+ * @otp_calib_hi: Calibration from OTP
+ * @otp_calib_lo: Calibration from OTP
+ */
+struct ab8500_adc_cal_data {
+	s64 gain;
+	s64 offset;
+	u16 otp_calib_hi;
+	u16 otp_calib_lo;
+};
+
+/**
+ * struct ab8500_gpadc_chan_info - per-channel GPADC info
+ * @name: name of the channel
+ * @id: the internal AB8500 ID number for the channel
+ * @hardware_control: indicate that we want to use hardware ADC control
+ * on this channel, the default is software ADC control. Hardware control
+ * is normally only used to test the battery voltage during GSM bursts
+ * and needs a hardware trigger on the GPADCTrig pin of the ASIC.
+ * @falling_edge: indicate that we want to trigger on falling edge
+ * rather than rising edge, rising edge is the default
+ * @avg_sample: how many samples to average: must be 1, 4, 8 or 16.
+ * @trig_timer: how long to wait for the trigger, in 32kHz periods:
+ * 0 .. 255 periods
+ */
+struct ab8500_gpadc_chan_info {
+	const char *name;
+	u8 id;
+	bool hardware_control;
+	bool falling_edge;
+	u8 avg_sample;
+	u8 trig_timer;
+};
+
+/**
+ * struct ab8500_gpadc - AB8500 GPADC device information
+ * @dev: pointer to the containing device
+ * @ab8500: pointer to the parent AB8500 device
+ * @chans: internal per-channel information container
+ * @nchans: number of channels
+ * @complete: pointer to the completion that indicates
+ * the completion of an gpadc conversion cycle
+ * @vddadc: pointer to the regulator supplying VDDADC
+ * @irq_sw: interrupt number that is used by gpadc for software ADC conversion
+ * @irq_hw: interrupt number that is used by gpadc for hardware ADC conversion
+ * @cal_data: array of ADC calibration data structs
+ */
+struct ab8500_gpadc {
+	struct device *dev;
+	struct ab8500 *ab8500;
+	struct ab8500_gpadc_chan_info *chans;
+	unsigned int nchans;
+	struct completion complete;
+	struct regulator *vddadc;
+	int irq_sw;
+	int irq_hw;
+	struct ab8500_adc_cal_data cal_data[AB8500_CAL_NR];
+};
+
+static struct ab8500_gpadc_chan_info *
+ab8500_gpadc_get_channel(struct ab8500_gpadc *gpadc, u8 chan)
+{
+	struct ab8500_gpadc_chan_info *ch;
+	int i;
+
+	for (i = 0; i < gpadc->nchans; i++) {
+		ch = &gpadc->chans[i];
+		if (ch->id == chan)
+			break;
+	}
+	if (i == gpadc->nchans)
+		return NULL;
+
+	return ch;
+}
+
+/**
+ * ab8500_gpadc_ad_to_voltage() - Convert a raw ADC value to a voltage
+ * @gpadc: GPADC instance
+ * @ch: the sampled channel this raw value is coming from
+ * @ad_value: the raw value
+ */
+static int ab8500_gpadc_ad_to_voltage(struct ab8500_gpadc *gpadc,
+				      enum ab8500_gpadc_channel ch,
+				      int ad_value)
+{
+	int res;
+
+	switch (ch) {
+	case AB8500_GPADC_CHAN_MAIN_CHARGER:
+		/* No calibration data available: just interpolate */
+		if (!gpadc->cal_data[AB8500_CAL_VMAIN].gain) {
+			res = AB8500_ADC_CH_CHG_V_MIN + (AB8500_ADC_CH_CHG_V_MAX -
+				AB8500_ADC_CH_CHG_V_MIN) * ad_value /
+				AB8500_ADC_RESOLUTION;
+			break;
+		}
+		/* Here we can use calibration */
+		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_VMAIN].gain +
+			gpadc->cal_data[AB8500_CAL_VMAIN].offset) / AB8500_GPADC_CALIB_SCALE;
+		break;
+
+	case AB8500_GPADC_CHAN_BAT_CTRL:
+	case AB8500_GPADC_CHAN_BAT_TEMP:
+	case AB8500_GPADC_CHAN_ACC_DET_1:
+	case AB8500_GPADC_CHAN_ADC_AUX_1:
+	case AB8500_GPADC_CHAN_ADC_AUX_2:
+	case AB8500_GPADC_CHAN_XTAL_TEMP:
+		/* No calibration data available: just interpolate */
+		if (!gpadc->cal_data[AB8500_CAL_BTEMP].gain) {
+			res = AB8500_ADC_CH_BTEMP_MIN + (AB8500_ADC_CH_BTEMP_MAX -
+				AB8500_ADC_CH_BTEMP_MIN) * ad_value /
+				AB8500_ADC_RESOLUTION;
+			break;
+		}
+		/* Here we can use calibration */
+		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_BTEMP].gain +
+			gpadc->cal_data[AB8500_CAL_BTEMP].offset) / AB8500_GPADC_CALIB_SCALE;
+		break;
+
+	case AB8500_GPADC_CHAN_VBAT_A:
+	case AB8500_GPADC_CHAN_VBAT_TRUE_MEAS:
+		/* No calibration data available: just interpolate */
+		if (!gpadc->cal_data[AB8500_CAL_VBAT].gain) {
+			res = AB8500_ADC_CH_VBAT_MIN + (AB8500_ADC_CH_VBAT_MAX -
+				AB8500_ADC_CH_VBAT_MIN) * ad_value /
+				AB8500_ADC_RESOLUTION;
+			break;
+		}
+		/* Here we can use calibration */
+		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_VBAT].gain +
+			gpadc->cal_data[AB8500_CAL_VBAT].offset) / AB8500_GPADC_CALIB_SCALE;
+		break;
+
+	case AB8505_GPADC_CHAN_DIE_TEMP:
+		res = AB8500_ADC_CH_DIETEMP_MIN +
+			(AB8500_ADC_CH_DIETEMP_MAX - AB8500_ADC_CH_DIETEMP_MIN) * ad_value /
+			AB8500_ADC_RESOLUTION;
+		break;
+
+	case AB8500_GPADC_CHAN_ACC_DET_2:
+		res = AB8500_ADC_CH_ACCDET2_MIN +
+			(AB8500_ADC_CH_ACCDET2_MAX - AB8500_ADC_CH_ACCDET2_MIN) * ad_value /
+			AB8500_ADC_RESOLUTION;
+		break;
+
+	case AB8500_GPADC_CHAN_VBUS:
+		res = AB8500_ADC_CH_CHG_V_MIN +
+			(AB8500_ADC_CH_CHG_V_MAX - AB8500_ADC_CH_CHG_V_MIN) * ad_value /
+			AB8500_ADC_RESOLUTION;
+		break;
+
+	case AB8500_GPADC_CHAN_MAIN_CHARGER_CURRENT:
+	case AB8500_GPADC_CHAN_USB_CHARGER_CURRENT:
+		res = AB8500_ADC_CH_CHG_I_MIN +
+			(AB8500_ADC_CH_CHG_I_MAX - AB8500_ADC_CH_CHG_I_MIN) * ad_value /
+			AB8500_ADC_RESOLUTION;
+		break;
+
+	case AB8500_GPADC_CHAN_BACKUP_BAT:
+		res = AB8500_ADC_CH_BKBAT_MIN +
+			(AB8500_ADC_CH_BKBAT_MAX - AB8500_ADC_CH_BKBAT_MIN) * ad_value /
+			AB8500_ADC_RESOLUTION;
+		break;
+
+	case AB8500_GPADC_CHAN_IBAT_VIRTUAL:
+		/* No calibration data available: just interpolate */
+		if (!gpadc->cal_data[AB8500_CAL_IBAT].gain) {
+			res = AB8500_ADC_CH_IBAT_MIN + (AB8500_ADC_CH_IBAT_MAX -
+				AB8500_ADC_CH_IBAT_MIN) * ad_value /
+				AB8500_ADC_RESOLUTION;
+			break;
+		}
+		/* Here we can use calibration */
+		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_IBAT].gain +
+				gpadc->cal_data[AB8500_CAL_IBAT].offset)
+				>> AB8500_GPADC_CALIB_SHIFT_IBAT;
+		break;
+
+	default:
+		dev_err(gpadc->dev,
+			"unknown channel ID: %d, not possible to convert\n",
+			ch);
+		res = -EINVAL;
+		break;
+
+	}
+
+	return res;
+}
+
+static int ab8500_gpadc_read(struct ab8500_gpadc *gpadc,
+			     const struct ab8500_gpadc_chan_info *ch,
+			     int *ibat)
+{
+	int ret;
+	int looplimit = 0;
+	unsigned long completion_timeout;
+	u8 val;
+	u8 low_data, high_data, low_data2, high_data2;
+	u8 ctrl1;
+	u8 ctrl23;
+	unsigned int delay_min = 0;
+	unsigned int delay_max = 0;
+	u8 data_low_addr, data_high_addr;
+
+	if (!gpadc)
+		return -ENODEV;
+
+	/* check if conversion is supported */
+	if ((gpadc->irq_sw <= 0) && !ch->hardware_control)
+		return -ENOTSUPP;
+	if ((gpadc->irq_hw <= 0) && ch->hardware_control)
+		return -ENOTSUPP;
+
+	/* Enable vddadc by grabbing PM runtime */
+	pm_runtime_get_sync(gpadc->dev);
+
+	/* Check if ADC is not busy, lock and proceed */
+	do {
+		ret = abx500_get_register_interruptible(gpadc->dev,
+			AB8500_GPADC, AB8500_GPADC_STAT_REG, &val);
+		if (ret < 0)
+			goto out;
+		if (!(val & AB8500_GPADC_STAT_BUSY))
+			break;
+		msleep(20);
+	} while (++looplimit < 10);
+	if (looplimit >= 10 && (val & AB8500_GPADC_STAT_BUSY)) {
+		dev_err(gpadc->dev, "gpadc_conversion: GPADC busy");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Enable GPADC */
+	ctrl1 = AB8500_GPADC_CTRL1_ENABLE;
+
+	/* Select the channel source and set average samples */
+	switch (ch->avg_sample) {
+	case 1:
+		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_1;
+		break;
+	case 4:
+		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_4;
+		break;
+	case 8:
+		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_8;
+		break;
+	default:
+		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_16;
+		break;
+	}
+
+	if (ch->hardware_control) {
+		ret = abx500_set_register_interruptible(gpadc->dev,
+				AB8500_GPADC, AB8500_GPADC_CTRL3_REG, ctrl23);
+		ctrl1 |= AB8500_GPADC_CTRL1_TRIG_ENA;
+		if (ch->falling_edge)
+			ctrl1 |= AB8500_GPADC_CTRL1_TRIG_EDGE;
+	} else {
+		ret = abx500_set_register_interruptible(gpadc->dev,
+				AB8500_GPADC, AB8500_GPADC_CTRL2_REG, ctrl23);
+	}
+	if (ret < 0) {
+		dev_err(gpadc->dev,
+			"gpadc_conversion: set avg samples failed\n");
+		goto out;
+	}
+
+	/*
+	 * Enable ADC, buffering, select rising edge and enable ADC path
+	 * charging current sense if it needed, ABB 3.0 needs some special
+	 * treatment too.
+	 */
+	switch (ch->id) {
+	case AB8500_GPADC_CHAN_MAIN_CHARGER_CURRENT:
+	case AB8500_GPADC_CHAN_USB_CHARGER_CURRENT:
+		ctrl1 |= AB8500_GPADC_CTRL1_BUF_ENA |
+			AB8500_GPADC_CTRL1_ICHAR_ENA;
+		break;
+	case AB8500_GPADC_CHAN_BAT_TEMP:
+		if (!is_ab8500_2p0_or_earlier(gpadc->ab8500)) {
+			ctrl1 |= AB8500_GPADC_CTRL1_BUF_ENA |
+				AB8500_GPADC_CTRL1_BTEMP_PULL_UP;
+			/*
+			 * Delay might be needed for ABB8500 cut 3.0, if not,
+			 * remove when hardware will be available
+			 */
+			delay_min = 1000; /* Delay in micro seconds */
+			delay_max = 10000; /* large range optimises sleepmode */
+			break;
+		}
+		/* Fall through */
+	default:
+		ctrl1 |= AB8500_GPADC_CTRL1_BUF_ENA;
+		break;
+	}
+
+	/* Write configuration to control register 1 */
+	ret = abx500_set_register_interruptible(gpadc->dev,
+		AB8500_GPADC, AB8500_GPADC_CTRL1_REG, ctrl1);
+	if (ret < 0) {
+		dev_err(gpadc->dev,
+			"gpadc_conversion: set Control register failed\n");
+		goto out;
+	}
+
+	if (delay_min != 0)
+		usleep_range(delay_min, delay_max);
+
+	if (ch->hardware_control) {
+		/* Set trigger delay timer */
+		ret = abx500_set_register_interruptible(gpadc->dev,
+			AB8500_GPADC, AB8500_GPADC_AUTO_TIMER_REG,
+			ch->trig_timer);
+		if (ret < 0) {
+			dev_err(gpadc->dev,
+				"gpadc_conversion: trig timer failed\n");
+			goto out;
+		}
+		completion_timeout = 2 * HZ;
+		data_low_addr = AB8500_GPADC_AUTODATAL_REG;
+		data_high_addr = AB8500_GPADC_AUTODATAH_REG;
+	} else {
+		/* Start SW conversion */
+		ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
+			AB8500_GPADC, AB8500_GPADC_CTRL1_REG,
+			AB8500_GPADC_CTRL1_START_SW_CONV,
+			AB8500_GPADC_CTRL1_START_SW_CONV);
+		if (ret < 0) {
+			dev_err(gpadc->dev,
+				"gpadc_conversion: start s/w conv failed\n");
+			goto out;
+		}
+		completion_timeout = msecs_to_jiffies(AB8500_GPADC_CONVERSION_TIME);
+		data_low_addr = AB8500_GPADC_MANDATAL_REG;
+		data_high_addr = AB8500_GPADC_MANDATAH_REG;
+	}
+
+	/* Wait for completion of conversion */
+	if (!wait_for_completion_timeout(&gpadc->complete,
+			completion_timeout)) {
+		dev_err(gpadc->dev,
+			"timeout didn't receive GPADC conv interrupt\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Read the converted RAW data */
+	ret = abx500_get_register_interruptible(gpadc->dev,
+			AB8500_GPADC, data_low_addr, &low_data);
+	if (ret < 0) {
+		dev_err(gpadc->dev,
+			"gpadc_conversion: read low data failed\n");
+		goto out;
+	}
+
+	ret = abx500_get_register_interruptible(gpadc->dev,
+		AB8500_GPADC, data_high_addr, &high_data);
+	if (ret < 0) {
+		dev_err(gpadc->dev,
+			"gpadc_conversion: read high data failed\n");
+		goto out;
+	}
+
+	/* Check if double conversion is required */
+	if ((ch->id == AB8500_GPADC_CHAN_BAT_CTRL_AND_IBAT) ||
+	    (ch->id == AB8500_GPADC_CHAN_VBAT_MEAS_AND_IBAT) ||
+	    (ch->id == AB8500_GPADC_CHAN_VBAT_TRUE_MEAS_AND_IBAT) ||
+	    (ch->id == AB8500_GPADC_CHAN_BAT_TEMP_AND_IBAT)) {
+
+		if (ch->hardware_control) {
+			/* not supported */
+			ret = -ENOTSUPP;
+			dev_err(gpadc->dev,
+				"gpadc_conversion: only SW double conversion supported\n");
+			goto out;
+		} else {
+			/* Read the converted RAW data 2 */
+			ret = abx500_get_register_interruptible(gpadc->dev,
+				AB8500_GPADC, AB8540_GPADC_MANDATA2L_REG,
+				&low_data2);
+			if (ret < 0) {
+				dev_err(gpadc->dev,
+					"gpadc_conversion: read sw low data 2 failed\n");
+				goto out;
+			}
+
+			ret = abx500_get_register_interruptible(gpadc->dev,
+				AB8500_GPADC, AB8540_GPADC_MANDATA2H_REG,
+				&high_data2);
+			if (ret < 0) {
+				dev_err(gpadc->dev,
+					"gpadc_conversion: read sw high data 2 failed\n");
+				goto out;
+			}
+			if (ibat != NULL) {
+				*ibat = (high_data2 << 8) | low_data2;
+			} else {
+				dev_warn(gpadc->dev,
+					"gpadc_conversion: ibat not stored\n");
+			}
+
+		}
+	}
+
+	/* Disable GPADC */
+	ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,
+		AB8500_GPADC_CTRL1_REG, AB8500_GPADC_CTRL1_DISABLE);
+	if (ret < 0) {
+		dev_err(gpadc->dev, "gpadc_conversion: disable gpadc failed\n");
+		goto out;
+	}
+
+	/* This eventually drops the regulator */
+	pm_runtime_mark_last_busy(gpadc->dev);
+	pm_runtime_put_autosuspend(gpadc->dev);
+
+	return (high_data << 8) | low_data;
+
+out:
+	/*
+	 * It has shown to be needed to turn off the GPADC if an error occurs,
+	 * otherwise we might have problem when waiting for the busy bit in the
+	 * GPADC status register to go low. In V1.1 there wait_for_completion
+	 * seems to timeout when waiting for an interrupt.. Not seen in V2.0
+	 */
+	(void) abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,
+		AB8500_GPADC_CTRL1_REG, AB8500_GPADC_CTRL1_DISABLE);
+	pm_runtime_put(gpadc->dev);
+	dev_err(gpadc->dev,
+		"gpadc_conversion: Failed to AD convert channel %d\n", ch->id);
+
+	return ret;
+}
+
+/**
+ * ab8500_bm_gpadcconvend_handler() - isr for gpadc conversion completion
+ * @irq: irq number
+ * @data: pointer to the data passed during request irq
+ *
+ * This is a interrupt service routine for gpadc conversion completion.
+ * Notifies the gpadc completion is completed and the converted raw value
+ * can be read from the registers.
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_bm_gpadcconvend_handler(int irq, void *data)
+{
+	struct ab8500_gpadc *gpadc = data;
+
+	complete(&gpadc->complete);
+
+	return IRQ_HANDLED;
+}
+
+static int otp_cal_regs[] = {
+	AB8500_GPADC_CAL_1,
+	AB8500_GPADC_CAL_2,
+	AB8500_GPADC_CAL_3,
+	AB8500_GPADC_CAL_4,
+	AB8500_GPADC_CAL_5,
+	AB8500_GPADC_CAL_6,
+	AB8500_GPADC_CAL_7,
+};
+
+static int otp4_cal_regs[] = {
+	AB8540_GPADC_OTP4_REG_7,
+	AB8540_GPADC_OTP4_REG_6,
+	AB8540_GPADC_OTP4_REG_5,
+};
+
+static void ab8500_gpadc_read_calibration_data(struct ab8500_gpadc *gpadc)
+{
+	int i;
+	int ret[ARRAY_SIZE(otp_cal_regs)];
+	u8 gpadc_cal[ARRAY_SIZE(otp_cal_regs)];
+	int ret_otp4[ARRAY_SIZE(otp4_cal_regs)];
+	u8 gpadc_otp4[ARRAY_SIZE(otp4_cal_regs)];
+	int vmain_high, vmain_low;
+	int btemp_high, btemp_low;
+	int vbat_high, vbat_low;
+	int ibat_high, ibat_low;
+	s64 V_gain, V_offset, V2A_gain, V2A_offset;
+
+	/* First we read all OTP registers and store the error code */
+	for (i = 0; i < ARRAY_SIZE(otp_cal_regs); i++) {
+		ret[i] = abx500_get_register_interruptible(gpadc->dev,
+			AB8500_OTP_EMUL, otp_cal_regs[i],  &gpadc_cal[i]);
+		if (ret[i] < 0) {
+			/* Continue anyway: maybe the other registers are OK */
+			dev_err(gpadc->dev, "%s: read otp reg 0x%02x failed\n",
+				__func__, otp_cal_regs[i]);
+		} else {
+			/* Put this in the entropy pool as device-unique */
+			add_device_randomness(&ret[i], sizeof(ret[i]));
+		}
+	}
+
+	/*
+	 * The ADC calibration data is stored in OTP registers.
+	 * The layout of the calibration data is outlined below and a more
+	 * detailed description can be found in UM0836
+	 *
+	 * vm_h/l = vmain_high/low
+	 * bt_h/l = btemp_high/low
+	 * vb_h/l = vbat_high/low
+	 *
+	 * Data bits 8500/9540:
+	 * | 7	   | 6	   | 5	   | 4	   | 3	   | 2	   | 1	   | 0
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * |						   | vm_h9 | vm_h8
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * |		   | vm_h7 | vm_h6 | vm_h5 | vm_h4 | vm_h3 | vm_h2
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vm_h1 | vm_h0 | vm_l4 | vm_l3 | vm_l2 | vm_l1 | vm_l0 | bt_h9
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | bt_h8 | bt_h7 | bt_h6 | bt_h5 | bt_h4 | bt_h3 | bt_h2 | bt_h1
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | bt_h0 | bt_l4 | bt_l3 | bt_l2 | bt_l1 | bt_l0 | vb_h9 | vb_h8
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vb_h7 | vb_h6 | vb_h5 | vb_h4 | vb_h3 | vb_h2 | vb_h1 | vb_h0
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vb_l5 | vb_l4 | vb_l3 | vb_l2 | vb_l1 | vb_l0 |
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 *
+	 * Data bits 8540:
+	 * OTP2
+	 * | 7	   | 6	   | 5	   | 4	   | 3	   | 2	   | 1	   | 0
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * |
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vm_h9 | vm_h8 | vm_h7 | vm_h6 | vm_h5 | vm_h4 | vm_h3 | vm_h2
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vm_h1 | vm_h0 | vm_l4 | vm_l3 | vm_l2 | vm_l1 | vm_l0 | bt_h9
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | bt_h8 | bt_h7 | bt_h6 | bt_h5 | bt_h4 | bt_h3 | bt_h2 | bt_h1
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | bt_h0 | bt_l4 | bt_l3 | bt_l2 | bt_l1 | bt_l0 | vb_h9 | vb_h8
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vb_h7 | vb_h6 | vb_h5 | vb_h4 | vb_h3 | vb_h2 | vb_h1 | vb_h0
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | vb_l5 | vb_l4 | vb_l3 | vb_l2 | vb_l1 | vb_l0 |
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 *
+	 * Data bits 8540:
+	 * OTP4
+	 * | 7	   | 6	   | 5	   | 4	   | 3	   | 2	   | 1	   | 0
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * |					   | ib_h9 | ib_h8 | ib_h7
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | ib_h6 | ib_h5 | ib_h4 | ib_h3 | ib_h2 | ib_h1 | ib_h0 | ib_l5
+	 * |.......|.......|.......|.......|.......|.......|.......|.......
+	 * | ib_l4 | ib_l3 | ib_l2 | ib_l1 | ib_l0 |
+	 *
+	 *
+	 * Ideal output ADC codes corresponding to injected input voltages
+	 * during manufacturing is:
+	 *
+	 * vmain_high: Vin = 19500mV / ADC ideal code = 997
+	 * vmain_low:  Vin = 315mV   / ADC ideal code = 16
+	 * btemp_high: Vin = 1300mV  / ADC ideal code = 985
+	 * btemp_low:  Vin = 21mV    / ADC ideal code = 16
+	 * vbat_high:  Vin = 4700mV  / ADC ideal code = 982
+	 * vbat_low:   Vin = 2380mV  / ADC ideal code = 33
+	 */
+
+	if (is_ab8540(gpadc->ab8500)) {
+		/* Calculate gain and offset for VMAIN if all reads succeeded*/
+		if (!(ret[1] < 0 || ret[2] < 0)) {
+			vmain_high = (((gpadc_cal[1] & 0xFF) << 2) |
+				((gpadc_cal[2] & 0xC0) >> 6));
+			vmain_low = ((gpadc_cal[2] & 0x3E) >> 1);
+
+			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_hi =
+				(u16)vmain_high;
+			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_lo =
+				(u16)vmain_low;
+
+			gpadc->cal_data[AB8500_CAL_VMAIN].gain = AB8500_GPADC_CALIB_SCALE *
+				(19500 - 315) / (vmain_high - vmain_low);
+			gpadc->cal_data[AB8500_CAL_VMAIN].offset = AB8500_GPADC_CALIB_SCALE *
+				19500 - (AB8500_GPADC_CALIB_SCALE * (19500 - 315) /
+				(vmain_high - vmain_low)) * vmain_high;
+		} else {
+			gpadc->cal_data[AB8500_CAL_VMAIN].gain = 0;
+		}
+
+		/* Read IBAT calibration Data */
+		for (i = 0; i < ARRAY_SIZE(otp4_cal_regs); i++) {
+			ret_otp4[i] = abx500_get_register_interruptible(
+					gpadc->dev, AB8500_OTP_EMUL,
+					otp4_cal_regs[i],  &gpadc_otp4[i]);
+			if (ret_otp4[i] < 0)
+				dev_err(gpadc->dev,
+					"%s: read otp4 reg 0x%02x failed\n",
+					__func__, otp4_cal_regs[i]);
+		}
+
+		/* Calculate gain and offset for IBAT if all reads succeeded */
+		if (!(ret_otp4[0] < 0 || ret_otp4[1] < 0 || ret_otp4[2] < 0)) {
+			ibat_high = (((gpadc_otp4[0] & 0x07) << 7) |
+				((gpadc_otp4[1] & 0xFE) >> 1));
+			ibat_low = (((gpadc_otp4[1] & 0x01) << 5) |
+				((gpadc_otp4[2] & 0xF8) >> 3));
+
+			gpadc->cal_data[AB8500_CAL_IBAT].otp_calib_hi =
+				(u16)ibat_high;
+			gpadc->cal_data[AB8500_CAL_IBAT].otp_calib_lo =
+				(u16)ibat_low;
+
+			V_gain = ((AB8500_GPADC_IBAT_VDROP_H - AB8500_GPADC_IBAT_VDROP_L)
+				<< AB8500_GPADC_CALIB_SHIFT_IBAT) / (ibat_high - ibat_low);
+
+			V_offset = (AB8500_GPADC_IBAT_VDROP_H << AB8500_GPADC_CALIB_SHIFT_IBAT) -
+				(((AB8500_GPADC_IBAT_VDROP_H - AB8500_GPADC_IBAT_VDROP_L) <<
+				AB8500_GPADC_CALIB_SHIFT_IBAT) / (ibat_high - ibat_low))
+				* ibat_high;
+			/*
+			 * Result obtained is in mV (at a scale factor),
+			 * we need to calculate gain and offset to get mA
+			 */
+			V2A_gain = (AB8500_ADC_CH_IBAT_MAX - AB8500_ADC_CH_IBAT_MIN)/
+				(AB8500_ADC_CH_IBAT_MAX_V - AB8500_ADC_CH_IBAT_MIN_V);
+			V2A_offset = ((AB8500_ADC_CH_IBAT_MAX_V * AB8500_ADC_CH_IBAT_MIN -
+				AB8500_ADC_CH_IBAT_MAX * AB8500_ADC_CH_IBAT_MIN_V)
+				<< AB8500_GPADC_CALIB_SHIFT_IBAT)
+				/ (AB8500_ADC_CH_IBAT_MAX_V - AB8500_ADC_CH_IBAT_MIN_V);
+
+			gpadc->cal_data[AB8500_CAL_IBAT].gain =
+				V_gain * V2A_gain;
+			gpadc->cal_data[AB8500_CAL_IBAT].offset =
+				V_offset * V2A_gain + V2A_offset;
+		} else {
+			gpadc->cal_data[AB8500_CAL_IBAT].gain = 0;
+		}
+	} else {
+		/* Calculate gain and offset for VMAIN if all reads succeeded */
+		if (!(ret[0] < 0 || ret[1] < 0 || ret[2] < 0)) {
+			vmain_high = (((gpadc_cal[0] & 0x03) << 8) |
+				((gpadc_cal[1] & 0x3F) << 2) |
+				((gpadc_cal[2] & 0xC0) >> 6));
+			vmain_low = ((gpadc_cal[2] & 0x3E) >> 1);
+
+			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_hi =
+				(u16)vmain_high;
+			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_lo =
+				(u16)vmain_low;
+
+			gpadc->cal_data[AB8500_CAL_VMAIN].gain = AB8500_GPADC_CALIB_SCALE *
+				(19500 - 315) / (vmain_high - vmain_low);
+
+			gpadc->cal_data[AB8500_CAL_VMAIN].offset = AB8500_GPADC_CALIB_SCALE *
+				19500 - (AB8500_GPADC_CALIB_SCALE * (19500 - 315) /
+				(vmain_high - vmain_low)) * vmain_high;
+		} else {
+			gpadc->cal_data[AB8500_CAL_VMAIN].gain = 0;
+		}
+	}
+
+	/* Calculate gain and offset for BTEMP if all reads succeeded */
+	if (!(ret[2] < 0 || ret[3] < 0 || ret[4] < 0)) {
+		btemp_high = (((gpadc_cal[2] & 0x01) << 9) |
+			(gpadc_cal[3] << 1) | ((gpadc_cal[4] & 0x80) >> 7));
+		btemp_low = ((gpadc_cal[4] & 0x7C) >> 2);
+
+		gpadc->cal_data[AB8500_CAL_BTEMP].otp_calib_hi = (u16)btemp_high;
+		gpadc->cal_data[AB8500_CAL_BTEMP].otp_calib_lo = (u16)btemp_low;
+
+		gpadc->cal_data[AB8500_CAL_BTEMP].gain =
+			AB8500_GPADC_CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low);
+		gpadc->cal_data[AB8500_CAL_BTEMP].offset = AB8500_GPADC_CALIB_SCALE * 1300 -
+			(AB8500_GPADC_CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low))
+			* btemp_high;
+	} else {
+		gpadc->cal_data[AB8500_CAL_BTEMP].gain = 0;
+	}
+
+	/* Calculate gain and offset for VBAT if all reads succeeded */
+	if (!(ret[4] < 0 || ret[5] < 0 || ret[6] < 0)) {
+		vbat_high = (((gpadc_cal[4] & 0x03) << 8) | gpadc_cal[5]);
+		vbat_low = ((gpadc_cal[6] & 0xFC) >> 2);
+
+		gpadc->cal_data[AB8500_CAL_VBAT].otp_calib_hi = (u16)vbat_high;
+		gpadc->cal_data[AB8500_CAL_VBAT].otp_calib_lo = (u16)vbat_low;
+
+		gpadc->cal_data[AB8500_CAL_VBAT].gain = AB8500_GPADC_CALIB_SCALE *
+			(4700 - 2380) /	(vbat_high - vbat_low);
+		gpadc->cal_data[AB8500_CAL_VBAT].offset = AB8500_GPADC_CALIB_SCALE * 4700 -
+			(AB8500_GPADC_CALIB_SCALE * (4700 - 2380) /
+			(vbat_high - vbat_low)) * vbat_high;
+	} else {
+		gpadc->cal_data[AB8500_CAL_VBAT].gain = 0;
+	}
+}
+
+static int ab8500_gpadc_read_raw(struct iio_dev *indio_dev,
+				 struct iio_chan_spec const *chan,
+				 int *val, int *val2, long mask)
+{
+	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);
+	const struct ab8500_gpadc_chan_info *ch;
+	int raw_val;
+	int processed;
+
+	ch = ab8500_gpadc_get_channel(gpadc, chan->address);
+	if (!ch) {
+		dev_err(gpadc->dev, "no such channel %lu\n",
+			chan->address);
+		return -EINVAL;
+	}
+
+	raw_val = ab8500_gpadc_read(gpadc, ch, NULL);
+	if (raw_val < 0)
+		return raw_val;
+
+	if (mask == IIO_CHAN_INFO_RAW) {
+		*val = raw_val;
+		return IIO_VAL_INT;
+	}
+
+	if (mask == IIO_CHAN_INFO_PROCESSED) {
+		processed = ab8500_gpadc_ad_to_voltage(gpadc, ch->id, raw_val);
+		if (processed < 0)
+			return processed;
+
+		/* Return millivolt or milliamps or millicentigrades */
+		*val = processed * 1000;
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int ab8500_gpadc_of_xlate(struct iio_dev *indio_dev,
+				 const struct of_phandle_args *iiospec)
+{
+	int i;
+
+	for (i = 0; i < indio_dev->num_channels; i++)
+		if (indio_dev->channels[i].channel == iiospec->args[0])
+			return i;
+
+	return -EINVAL;
+}
+
+static const struct iio_info ab8500_gpadc_info = {
+	.of_xlate = ab8500_gpadc_of_xlate,
+	.read_raw = ab8500_gpadc_read_raw,
+};
+
+#ifdef CONFIG_PM
+static int ab8500_gpadc_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);
+
+	regulator_disable(gpadc->vddadc);
+
+	return 0;
+}
+
+static int ab8500_gpadc_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);
+	int ret;
+
+	ret = regulator_enable(gpadc->vddadc);
+	if (ret)
+		dev_err(dev, "Failed to enable vddadc: %d\n", ret);
+
+	return ret;
+}
+#endif
+
+/**
+ * ab8500_gpadc_parse_channel() - process devicetree channel configuration
+ * @dev: pointer to containing device
+ * @np: device tree node for the channel to configure
+ * @ch: channel info to fill in
+ * @iio_chan: IIO channel specification to fill in
+ *
+ * The devicetree will set up the channel for use with the specific device,
+ * and define usage for things like AUX GPADC inputs more precisely.
+ */
+static int ab8500_gpadc_parse_channel(struct device *dev,
+				      struct device_node *np,
+				      struct ab8500_gpadc_chan_info *ch,
+				      struct iio_chan_spec *iio_chan)
+{
+	const char *name = np->name;
+	u32 chan;
+	int ret;
+
+	ret = of_property_read_u32(np, "reg", &chan);
+	if (ret) {
+		dev_err(dev, "invalid channel number %s\n", name);
+		return ret;
+	}
+	if (chan > AB8500_GPADC_CHAN_BAT_TEMP_AND_IBAT) {
+		dev_err(dev, "%s channel number out of range %d\n", name, chan);
+		return -EINVAL;
+	}
+
+	iio_chan->channel = chan;
+	iio_chan->datasheet_name = name;
+	iio_chan->indexed = 1;
+	iio_chan->address = chan;
+	iio_chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+		BIT(IIO_CHAN_INFO_PROCESSED);
+	/* Most are voltages (also temperatures), some are currents */
+	if ((chan == AB8500_GPADC_CHAN_MAIN_CHARGER_CURRENT) ||
+	    (chan == AB8500_GPADC_CHAN_USB_CHARGER_CURRENT))
+		iio_chan->type = IIO_CURRENT;
+	else
+		iio_chan->type = IIO_VOLTAGE;
+
+	ch->id = chan;
+
+	/* Sensible defaults */
+	ch->avg_sample = 16;
+	ch->hardware_control = false;
+	ch->falling_edge = false;
+	ch->trig_timer = 0;
+
+	return 0;
+}
+
+/**
+ * ab8500_gpadc_parse_channels() - Parse the GPADC channels from DT
+ * @gpadc: the GPADC to configure the channels for
+ * @np: device tree node containing the channel configurations
+ * @chans: the IIO channels we parsed
+ * @nchans: the number of IIO channels we parsed
+ */
+static int ab8500_gpadc_parse_channels(struct ab8500_gpadc *gpadc,
+				       struct device_node *np,
+				       struct iio_chan_spec **chans_parsed,
+				       unsigned int *nchans_parsed)
+{
+	struct device_node *child;
+	struct ab8500_gpadc_chan_info *ch;
+	struct iio_chan_spec *iio_chans;
+	unsigned int nchans;
+	int i;
+
+	nchans = of_get_available_child_count(np);
+	if (!nchans) {
+		dev_err(gpadc->dev, "no channel children\n");
+		return -ENODEV;
+	}
+	dev_info(gpadc->dev, "found %d ADC channels\n", nchans);
+
+	iio_chans = devm_kcalloc(gpadc->dev, nchans,
+				 sizeof(*iio_chans), GFP_KERNEL);
+	if (!iio_chans)
+		return -ENOMEM;
+
+	gpadc->chans = devm_kcalloc(gpadc->dev, nchans,
+				    sizeof(*gpadc->chans), GFP_KERNEL);
+	if (!gpadc->chans)
+		return -ENOMEM;
+
+	i = 0;
+	for_each_available_child_of_node(np, child) {
+		struct iio_chan_spec *iio_chan;
+		int ret;
+
+		ch = &gpadc->chans[i];
+		iio_chan = &iio_chans[i];
+
+		ret = ab8500_gpadc_parse_channel(gpadc->dev, child, ch,
+						 iio_chan);
+		if (ret) {
+			of_node_put(child);
+			return ret;
+		}
+		i++;
+	}
+	gpadc->nchans = nchans;
+	*chans_parsed = iio_chans;
+	*nchans_parsed = nchans;
+
+	return 0;
+}
+
+static int ab8500_gpadc_probe(struct platform_device *pdev)
+{
+	struct ab8500_gpadc *gpadc;
+	struct iio_dev *indio_dev;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = pdev->dev.of_node;
+	struct iio_chan_spec *iio_chans;
+	unsigned int n_iio_chans;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*gpadc));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, indio_dev);
+	gpadc = iio_priv(indio_dev);
+
+	gpadc->dev = dev;
+	gpadc->ab8500 = dev_get_drvdata(dev->parent);
+
+	ret = ab8500_gpadc_parse_channels(gpadc, np, &iio_chans, &n_iio_chans);
+	if (ret)
+		return ret;
+
+	gpadc->irq_sw = platform_get_irq_byname(pdev, "SW_CONV_END");
+	if (gpadc->irq_sw < 0) {
+		dev_err(dev, "failed to get platform sw_conv_end irq\n");
+		return gpadc->irq_sw;
+	}
+
+	gpadc->irq_hw = platform_get_irq_byname(pdev, "HW_CONV_END");
+	if (gpadc->irq_hw < 0) {
+		dev_err(dev, "failed to get platform hw_conv_end irq\n");
+		return gpadc->irq_hw;
+	}
+
+	/* Initialize completion used to notify completion of conversion */
+	init_completion(&gpadc->complete);
+
+	/* Request interrupts */
+	ret = devm_request_threaded_irq(dev, gpadc->irq_sw, NULL,
+		ab8500_bm_gpadcconvend_handler,	IRQF_NO_SUSPEND | IRQF_ONESHOT,
+		"ab8500-gpadc-sw", gpadc);
+	if (ret < 0) {
+		dev_err(dev,
+			"failed to request sw conversion irq %d\n",
+			gpadc->irq_sw);
+		return ret;
+	}
+
+	ret = devm_request_threaded_irq(dev, gpadc->irq_hw, NULL,
+		ab8500_bm_gpadcconvend_handler,	IRQF_NO_SUSPEND | IRQF_ONESHOT,
+		"ab8500-gpadc-hw", gpadc);
+	if (ret < 0) {
+		dev_err(dev,
+			"Failed to request hw conversion irq: %d\n",
+			gpadc->irq_hw);
+		return ret;
+	}
+
+	/* The VTVout LDO used to power the AB8500 GPADC */
+	gpadc->vddadc = devm_regulator_get(dev, "vddadc");
+	if (IS_ERR(gpadc->vddadc)) {
+		ret = PTR_ERR(gpadc->vddadc);
+		dev_err(dev, "failed to get vddadc\n");
+		return ret;
+	}
+
+	ret = regulator_enable(gpadc->vddadc);
+	if (ret) {
+		dev_err(dev, "failed to enable vddadc: %d\n", ret);
+		return ret;
+	}
+
+	/* Enable runtime PM */
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_runtime_set_autosuspend_delay(dev, AB8500_GPADC_AUTOSUSPEND_DELAY);
+	pm_runtime_use_autosuspend(dev);
+
+	ab8500_gpadc_read_calibration_data(gpadc);
+
+	pm_runtime_put(dev);
+
+	indio_dev->dev.parent = dev;
+	indio_dev->dev.of_node = np;
+	indio_dev->name = "ab8500-gpadc";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &ab8500_gpadc_info;
+	indio_dev->channels = iio_chans;
+	indio_dev->num_channels = n_iio_chans;
+
+	ret = devm_iio_device_register(dev, indio_dev);
+	if (ret)
+		goto out_dis_pm;
+
+	return 0;
+
+out_dis_pm:
+	pm_runtime_get_sync(dev);
+	pm_runtime_put_noidle(dev);
+	pm_runtime_disable(dev);
+	regulator_disable(gpadc->vddadc);
+
+	return ret;
+}
+
+static int ab8500_gpadc_remove(struct platform_device *pdev)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);
+
+	pm_runtime_get_sync(gpadc->dev);
+	pm_runtime_put_noidle(gpadc->dev);
+	pm_runtime_disable(gpadc->dev);
+	regulator_disable(gpadc->vddadc);
+
+	return 0;
+}
+
+static const struct dev_pm_ops ab8500_gpadc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(ab8500_gpadc_runtime_suspend,
+			   ab8500_gpadc_runtime_resume,
+			   NULL)
+};
+
+static struct platform_driver ab8500_gpadc_driver = {
+	.probe = ab8500_gpadc_probe,
+	.remove = ab8500_gpadc_remove,
+	.driver = {
+		.name = "ab8500-gpadc",
+		.pm = &ab8500_gpadc_pm_ops,
+	},
+};
+builtin_platform_driver(ab8500_gpadc_driver);
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH 7/7 v3] mfd: Switch the AB8500 GPADC to IIO
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
                   ` (5 preceding siblings ...)
  2019-10-01 22:13 ` [PATCH 6/7 v3] iio: adc: New driver for the AB8500 GPADC Linus Walleij
@ 2019-10-01 22:13 ` Linus Walleij
  2019-10-06 11:00 ` [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Jonathan Cameron
  7 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-01 22:13 UTC (permalink / raw)
  To: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler
  Cc: Mboumba Cedric Madianga, Linus Walleij

The AB8500 GPADC driver is indeed a "general purpose ADC" driver,
and while the IIO subsystem did not exist when the driver was
first merged, it is never too late to clean things up and move it
to the right place.

Nowadays IIO provides the right abstractions and interfaces to
do generic ADC work in the kernel.

We have to cut a bunch of debugfs luggage to make this transition
swift, but all these files to is read out the raw values of the
ADC and the IIO subsystem already has a standard sysfs ABI for
doing exactly this: no debugfs is needed.

Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Rebased on v5.4-rc1 (some debugfs business changed)
ChangeLog v1->v2:
- Woke up after 2 and a hald year of inactivity and rebased the
  patch.
- Split the new IIO driver into its own patch just adding the
  new driver.
- Convert an extraneous dev_info() to dev_dbg() to silence the
  debug log.

This should not be applied to the MFD tree right now, it
will be applied along with the other changes in ARM SoC.
---
 drivers/mfd/Kconfig                     |    7 -
 drivers/mfd/Makefile                    |    1 -
 drivers/mfd/ab8500-debugfs.c            |  715 ---------------
 drivers/mfd/ab8500-gpadc.c              | 1075 -----------------------
 include/linux/mfd/abx500/ab8500-gpadc.h |   75 --
 5 files changed, 1873 deletions(-)
 delete mode 100644 drivers/mfd/ab8500-gpadc.c
 delete mode 100644 include/linux/mfd/abx500/ab8500-gpadc.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ae24d3ea68ea..420900852166 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1210,13 +1210,6 @@ config AB8500_DEBUG
 	  Select this option if you want debug information using the debug
 	  filesystem, debugfs.
 
-config AB8500_GPADC
-	bool "ST-Ericsson AB8500 GPADC driver"
-	depends on AB8500_CORE && REGULATOR_AB8500
-	default y
-	help
-	  AB8500 GPADC driver used to convert Acc and battery/ac/usb voltage
-
 config MFD_DB8500_PRCMU
 	bool "ST-Ericsson DB8500 Power Reset Control Management Unit"
 	depends on UX500_SOC_DB8500
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c1067ea46204..aed99f08739f 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -177,7 +177,6 @@ obj-$(CONFIG_ABX500_CORE)	+= abx500-core.o
 obj-$(CONFIG_AB3100_CORE)	+= ab3100-core.o
 obj-$(CONFIG_AB3100_OTP)	+= ab3100-otp.o
 obj-$(CONFIG_AB8500_DEBUG)	+= ab8500-debugfs.o
-obj-$(CONFIG_AB8500_GPADC)	+= ab8500-gpadc.o
 obj-$(CONFIG_MFD_DB8500_PRCMU)	+= db8500-prcmu.o
 # ab8500-core need to come after db8500-prcmu (which provides the channel)
 obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o ab8500-sysctrl.o
diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c
index f4e26b6e5362..1a9a3414d4fa 100644
--- a/drivers/mfd/ab8500-debugfs.c
+++ b/drivers/mfd/ab8500-debugfs.c
@@ -84,7 +84,6 @@
 
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500.h>
-#include <linux/mfd/abx500/ab8500-gpadc.h>
 
 #ifdef CONFIG_DEBUG_FS
 #include <linux/string.h>
@@ -103,11 +102,6 @@ static int num_irqs;
 static struct device_attribute **dev_attr;
 static char **event_name;
 
-static u8 avg_sample = SAMPLE_16;
-static u8 trig_edge = RISING_EDGE;
-static u8 conv_type = ADC_SW;
-static u8 trig_timer;
-
 /**
  * struct ab8500_reg_range
  * @first: the first address of the range
@@ -152,7 +146,6 @@ static struct hwreg_cfg hwreg_cfg = {
 };
 
 #define AB8500_NAME_STRING "ab8500"
-#define AB8500_ADC_NAME_STRING "gpadc"
 #define AB8500_NUM_BANKS AB8500_DEBUG_FIELD_LAST
 
 #define AB8500_REV_REG 0x80
@@ -1646,633 +1639,6 @@ static int ab8500_modem_show(struct seq_file *s, void *p)
 
 DEFINE_SHOW_ATTRIBUTE(ab8500_modem);
 
-static int ab8500_gpadc_bat_ctrl_show(struct seq_file *s, void *p)
-{
-	int bat_ctrl_raw;
-	int bat_ctrl_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	bat_ctrl_raw = ab8500_gpadc_read_raw(gpadc, BAT_CTRL,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	bat_ctrl_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-		BAT_CTRL, bat_ctrl_raw);
-
-	seq_printf(s, "%d,0x%X\n", bat_ctrl_convert, bat_ctrl_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_bat_ctrl);
-
-static int ab8500_gpadc_btemp_ball_show(struct seq_file *s, void *p)
-{
-	int btemp_ball_raw;
-	int btemp_ball_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	btemp_ball_raw = ab8500_gpadc_read_raw(gpadc, BTEMP_BALL,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	btemp_ball_convert = ab8500_gpadc_ad_to_voltage(gpadc, BTEMP_BALL,
-		btemp_ball_raw);
-
-	seq_printf(s, "%d,0x%X\n", btemp_ball_convert, btemp_ball_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_btemp_ball);
-
-static int ab8500_gpadc_main_charger_v_show(struct seq_file *s, void *p)
-{
-	int main_charger_v_raw;
-	int main_charger_v_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	main_charger_v_raw = ab8500_gpadc_read_raw(gpadc, MAIN_CHARGER_V,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	main_charger_v_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-		MAIN_CHARGER_V, main_charger_v_raw);
-
-	seq_printf(s, "%d,0x%X\n", main_charger_v_convert, main_charger_v_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_main_charger_v);
-
-static int ab8500_gpadc_acc_detect1_show(struct seq_file *s, void *p)
-{
-	int acc_detect1_raw;
-	int acc_detect1_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	acc_detect1_raw = ab8500_gpadc_read_raw(gpadc, ACC_DETECT1,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	acc_detect1_convert = ab8500_gpadc_ad_to_voltage(gpadc, ACC_DETECT1,
-		acc_detect1_raw);
-
-	seq_printf(s, "%d,0x%X\n", acc_detect1_convert, acc_detect1_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_acc_detect1);
-
-static int ab8500_gpadc_acc_detect2_show(struct seq_file *s, void *p)
-{
-	int acc_detect2_raw;
-	int acc_detect2_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	acc_detect2_raw = ab8500_gpadc_read_raw(gpadc, ACC_DETECT2,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	acc_detect2_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-		ACC_DETECT2, acc_detect2_raw);
-
-	seq_printf(s, "%d,0x%X\n", acc_detect2_convert, acc_detect2_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_acc_detect2);
-
-static int ab8500_gpadc_aux1_show(struct seq_file *s, void *p)
-{
-	int aux1_raw;
-	int aux1_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	aux1_raw = ab8500_gpadc_read_raw(gpadc, ADC_AUX1,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	aux1_convert = ab8500_gpadc_ad_to_voltage(gpadc, ADC_AUX1,
-		aux1_raw);
-
-	seq_printf(s, "%d,0x%X\n", aux1_convert, aux1_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_aux1);
-
-static int ab8500_gpadc_aux2_show(struct seq_file *s, void *p)
-{
-	int aux2_raw;
-	int aux2_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	aux2_raw = ab8500_gpadc_read_raw(gpadc, ADC_AUX2,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	aux2_convert = ab8500_gpadc_ad_to_voltage(gpadc, ADC_AUX2,
-		aux2_raw);
-
-	seq_printf(s, "%d,0x%X\n", aux2_convert, aux2_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_aux2);
-
-static int ab8500_gpadc_main_bat_v_show(struct seq_file *s, void *p)
-{
-	int main_bat_v_raw;
-	int main_bat_v_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	main_bat_v_raw = ab8500_gpadc_read_raw(gpadc, MAIN_BAT_V,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	main_bat_v_convert = ab8500_gpadc_ad_to_voltage(gpadc, MAIN_BAT_V,
-		main_bat_v_raw);
-
-	seq_printf(s, "%d,0x%X\n", main_bat_v_convert, main_bat_v_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_main_bat_v);
-
-static int ab8500_gpadc_vbus_v_show(struct seq_file *s, void *p)
-{
-	int vbus_v_raw;
-	int vbus_v_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	vbus_v_raw =  ab8500_gpadc_read_raw(gpadc, VBUS_V,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	vbus_v_convert = ab8500_gpadc_ad_to_voltage(gpadc, VBUS_V,
-		vbus_v_raw);
-
-	seq_printf(s, "%d,0x%X\n", vbus_v_convert, vbus_v_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_vbus_v);
-
-static int ab8500_gpadc_main_charger_c_show(struct seq_file *s, void *p)
-{
-	int main_charger_c_raw;
-	int main_charger_c_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	main_charger_c_raw = ab8500_gpadc_read_raw(gpadc, MAIN_CHARGER_C,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	main_charger_c_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-		MAIN_CHARGER_C, main_charger_c_raw);
-
-	seq_printf(s, "%d,0x%X\n", main_charger_c_convert, main_charger_c_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_main_charger_c);
-
-static int ab8500_gpadc_usb_charger_c_show(struct seq_file *s, void *p)
-{
-	int usb_charger_c_raw;
-	int usb_charger_c_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	usb_charger_c_raw = ab8500_gpadc_read_raw(gpadc, USB_CHARGER_C,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	usb_charger_c_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-		USB_CHARGER_C, usb_charger_c_raw);
-
-	seq_printf(s, "%d,0x%X\n", usb_charger_c_convert, usb_charger_c_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_usb_charger_c);
-
-static int ab8500_gpadc_bk_bat_v_show(struct seq_file *s, void *p)
-{
-	int bk_bat_v_raw;
-	int bk_bat_v_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	bk_bat_v_raw = ab8500_gpadc_read_raw(gpadc, BK_BAT_V,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	bk_bat_v_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-		BK_BAT_V, bk_bat_v_raw);
-
-	seq_printf(s, "%d,0x%X\n", bk_bat_v_convert, bk_bat_v_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_bk_bat_v);
-
-static int ab8500_gpadc_die_temp_show(struct seq_file *s, void *p)
-{
-	int die_temp_raw;
-	int die_temp_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	die_temp_raw = ab8500_gpadc_read_raw(gpadc, DIE_TEMP,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	die_temp_convert = ab8500_gpadc_ad_to_voltage(gpadc, DIE_TEMP,
-		die_temp_raw);
-
-	seq_printf(s, "%d,0x%X\n", die_temp_convert, die_temp_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_die_temp);
-
-static int ab8500_gpadc_usb_id_show(struct seq_file *s, void *p)
-{
-	int usb_id_raw;
-	int usb_id_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	usb_id_raw = ab8500_gpadc_read_raw(gpadc, USB_ID,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	usb_id_convert = ab8500_gpadc_ad_to_voltage(gpadc, USB_ID,
-		usb_id_raw);
-
-	seq_printf(s, "%d,0x%X\n", usb_id_convert, usb_id_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8500_gpadc_usb_id);
-
-static int ab8540_gpadc_xtal_temp_show(struct seq_file *s, void *p)
-{
-	int xtal_temp_raw;
-	int xtal_temp_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	xtal_temp_raw = ab8500_gpadc_read_raw(gpadc, XTAL_TEMP,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	xtal_temp_convert = ab8500_gpadc_ad_to_voltage(gpadc, XTAL_TEMP,
-		xtal_temp_raw);
-
-	seq_printf(s, "%d,0x%X\n", xtal_temp_convert, xtal_temp_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_xtal_temp);
-
-static int ab8540_gpadc_vbat_true_meas_show(struct seq_file *s, void *p)
-{
-	int vbat_true_meas_raw;
-	int vbat_true_meas_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	vbat_true_meas_raw = ab8500_gpadc_read_raw(gpadc, VBAT_TRUE_MEAS,
-		avg_sample, trig_edge, trig_timer, conv_type);
-	vbat_true_meas_convert =
-		ab8500_gpadc_ad_to_voltage(gpadc, VBAT_TRUE_MEAS,
-					   vbat_true_meas_raw);
-
-	seq_printf(s, "%d,0x%X\n", vbat_true_meas_convert, vbat_true_meas_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_vbat_true_meas);
-
-static int ab8540_gpadc_bat_ctrl_and_ibat_show(struct seq_file *s, void *p)
-{
-	int bat_ctrl_raw;
-	int bat_ctrl_convert;
-	int ibat_raw;
-	int ibat_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	bat_ctrl_raw = ab8500_gpadc_double_read_raw(gpadc, BAT_CTRL_AND_IBAT,
-		avg_sample, trig_edge, trig_timer, conv_type, &ibat_raw);
-
-	bat_ctrl_convert = ab8500_gpadc_ad_to_voltage(gpadc, BAT_CTRL,
-		bat_ctrl_raw);
-	ibat_convert = ab8500_gpadc_ad_to_voltage(gpadc, IBAT_VIRTUAL_CHANNEL,
-		ibat_raw);
-
-	seq_printf(s,
-		   "%d,0x%X\n"
-		   "%d,0x%X\n",
-		   bat_ctrl_convert, bat_ctrl_raw,
-		   ibat_convert, ibat_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_bat_ctrl_and_ibat);
-
-static int ab8540_gpadc_vbat_meas_and_ibat_show(struct seq_file *s, void *p)
-{
-	int vbat_meas_raw;
-	int vbat_meas_convert;
-	int ibat_raw;
-	int ibat_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	vbat_meas_raw = ab8500_gpadc_double_read_raw(gpadc, VBAT_MEAS_AND_IBAT,
-		avg_sample, trig_edge, trig_timer, conv_type, &ibat_raw);
-	vbat_meas_convert = ab8500_gpadc_ad_to_voltage(gpadc, MAIN_BAT_V,
-		vbat_meas_raw);
-	ibat_convert = ab8500_gpadc_ad_to_voltage(gpadc, IBAT_VIRTUAL_CHANNEL,
-		ibat_raw);
-
-	seq_printf(s,
-		   "%d,0x%X\n"
-		   "%d,0x%X\n",
-		   vbat_meas_convert, vbat_meas_raw,
-		   ibat_convert, ibat_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_vbat_meas_and_ibat);
-
-static int ab8540_gpadc_vbat_true_meas_and_ibat_show(struct seq_file *s, void *p)
-{
-	int vbat_true_meas_raw;
-	int vbat_true_meas_convert;
-	int ibat_raw;
-	int ibat_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	vbat_true_meas_raw = ab8500_gpadc_double_read_raw(gpadc,
-			VBAT_TRUE_MEAS_AND_IBAT, avg_sample, trig_edge,
-			trig_timer, conv_type, &ibat_raw);
-	vbat_true_meas_convert = ab8500_gpadc_ad_to_voltage(gpadc,
-			VBAT_TRUE_MEAS, vbat_true_meas_raw);
-	ibat_convert = ab8500_gpadc_ad_to_voltage(gpadc, IBAT_VIRTUAL_CHANNEL,
-		ibat_raw);
-
-	seq_printf(s,
-		   "%d,0x%X\n"
-		   "%d,0x%X\n",
-		   vbat_true_meas_convert, vbat_true_meas_raw,
-		   ibat_convert, ibat_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_vbat_true_meas_and_ibat);
-
-static int ab8540_gpadc_bat_temp_and_ibat_show(struct seq_file *s, void *p)
-{
-	int bat_temp_raw;
-	int bat_temp_convert;
-	int ibat_raw;
-	int ibat_convert;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	bat_temp_raw = ab8500_gpadc_double_read_raw(gpadc, BAT_TEMP_AND_IBAT,
-		avg_sample, trig_edge, trig_timer, conv_type, &ibat_raw);
-	bat_temp_convert = ab8500_gpadc_ad_to_voltage(gpadc, BTEMP_BALL,
-		bat_temp_raw);
-	ibat_convert = ab8500_gpadc_ad_to_voltage(gpadc, IBAT_VIRTUAL_CHANNEL,
-		ibat_raw);
-
-	seq_printf(s,
-		   "%d,0x%X\n"
-		   "%d,0x%X\n",
-		   bat_temp_convert, bat_temp_raw,
-		   ibat_convert, ibat_raw);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_bat_temp_and_ibat);
-
-static int ab8540_gpadc_otp_calib_show(struct seq_file *s, void *p)
-{
-	struct ab8500_gpadc *gpadc;
-	u16 vmain_l, vmain_h, btemp_l, btemp_h;
-	u16 vbat_l, vbat_h, ibat_l, ibat_h;
-
-	gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
-	ab8540_gpadc_get_otp(gpadc, &vmain_l, &vmain_h, &btemp_l, &btemp_h,
-			&vbat_l, &vbat_h, &ibat_l, &ibat_h);
-	seq_printf(s,
-		   "VMAIN_L:0x%X\n"
-		   "VMAIN_H:0x%X\n"
-		   "BTEMP_L:0x%X\n"
-		   "BTEMP_H:0x%X\n"
-		   "VBAT_L:0x%X\n"
-		   "VBAT_H:0x%X\n"
-		   "IBAT_L:0x%X\n"
-		   "IBAT_H:0x%X\n",
-		   vmain_l, vmain_h, btemp_l, btemp_h,
-		   vbat_l, vbat_h, ibat_l, ibat_h);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(ab8540_gpadc_otp_calib);
-
-static int ab8500_gpadc_avg_sample_print(struct seq_file *s, void *p)
-{
-	seq_printf(s, "%d\n", avg_sample);
-
-	return 0;
-}
-
-static int ab8500_gpadc_avg_sample_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ab8500_gpadc_avg_sample_print,
-		inode->i_private);
-}
-
-static ssize_t ab8500_gpadc_avg_sample_write(struct file *file,
-	const char __user *user_buf,
-	size_t count, loff_t *ppos)
-{
-	struct device *dev = ((struct seq_file *)(file->private_data))->private;
-	unsigned long user_avg_sample;
-	int err;
-
-	err = kstrtoul_from_user(user_buf, count, 0, &user_avg_sample);
-	if (err)
-		return err;
-
-	if ((user_avg_sample == SAMPLE_1) || (user_avg_sample == SAMPLE_4)
-			|| (user_avg_sample == SAMPLE_8)
-			|| (user_avg_sample == SAMPLE_16)) {
-		avg_sample = (u8) user_avg_sample;
-	} else {
-		dev_err(dev,
-			"debugfs err input: should be egal to 1, 4, 8 or 16\n");
-		return -EINVAL;
-	}
-
-	return count;
-}
-
-static const struct file_operations ab8500_gpadc_avg_sample_fops = {
-	.open = ab8500_gpadc_avg_sample_open,
-	.read = seq_read,
-	.write = ab8500_gpadc_avg_sample_write,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
-
-static int ab8500_gpadc_trig_edge_print(struct seq_file *s, void *p)
-{
-	seq_printf(s, "%d\n", trig_edge);
-
-	return 0;
-}
-
-static int ab8500_gpadc_trig_edge_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ab8500_gpadc_trig_edge_print,
-		inode->i_private);
-}
-
-static ssize_t ab8500_gpadc_trig_edge_write(struct file *file,
-	const char __user *user_buf,
-	size_t count, loff_t *ppos)
-{
-	struct device *dev = ((struct seq_file *)(file->private_data))->private;
-	unsigned long user_trig_edge;
-	int err;
-
-	err = kstrtoul_from_user(user_buf, count, 0, &user_trig_edge);
-	if (err)
-		return err;
-
-	if ((user_trig_edge == RISING_EDGE)
-			|| (user_trig_edge == FALLING_EDGE)) {
-		trig_edge = (u8) user_trig_edge;
-	} else {
-		dev_err(dev, "Wrong input:\n"
-			"Enter 0. Rising edge\n"
-			"Enter 1. Falling edge\n");
-		return -EINVAL;
-	}
-
-	return count;
-}
-
-static const struct file_operations ab8500_gpadc_trig_edge_fops = {
-	.open = ab8500_gpadc_trig_edge_open,
-	.read = seq_read,
-	.write = ab8500_gpadc_trig_edge_write,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
-
-static int ab8500_gpadc_trig_timer_print(struct seq_file *s, void *p)
-{
-	seq_printf(s, "%d\n", trig_timer);
-
-	return 0;
-}
-
-static int ab8500_gpadc_trig_timer_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ab8500_gpadc_trig_timer_print,
-		inode->i_private);
-}
-
-static ssize_t ab8500_gpadc_trig_timer_write(struct file *file,
-	const char __user *user_buf,
-	size_t count, loff_t *ppos)
-{
-	struct device *dev = ((struct seq_file *)(file->private_data))->private;
-	unsigned long user_trig_timer;
-	int err;
-
-	err = kstrtoul_from_user(user_buf, count, 0, &user_trig_timer);
-	if (err)
-		return err;
-
-	if (user_trig_timer & ~0xFF) {
-		dev_err(dev,
-			"debugfs error input: should be between 0 to 255\n");
-		return -EINVAL;
-	}
-
-	trig_timer = (u8) user_trig_timer;
-
-	return count;
-}
-
-static const struct file_operations ab8500_gpadc_trig_timer_fops = {
-	.open = ab8500_gpadc_trig_timer_open,
-	.read = seq_read,
-	.write = ab8500_gpadc_trig_timer_write,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
-
-static int ab8500_gpadc_conv_type_print(struct seq_file *s, void *p)
-{
-	seq_printf(s, "%d\n", conv_type);
-
-	return 0;
-}
-
-static int ab8500_gpadc_conv_type_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ab8500_gpadc_conv_type_print,
-		inode->i_private);
-}
-
-static ssize_t ab8500_gpadc_conv_type_write(struct file *file,
-	const char __user *user_buf,
-	size_t count, loff_t *ppos)
-{
-	struct device *dev = ((struct seq_file *)(file->private_data))->private;
-	unsigned long user_conv_type;
-	int err;
-
-	err = kstrtoul_from_user(user_buf, count, 0, &user_conv_type);
-	if (err)
-		return err;
-
-	if ((user_conv_type == ADC_SW)
-			|| (user_conv_type == ADC_HW)) {
-		conv_type = (u8) user_conv_type;
-	} else {
-		dev_err(dev, "Wrong input:\n"
-			"Enter 0. ADC SW conversion\n"
-			"Enter 1. ADC HW conversion\n");
-		return -EINVAL;
-	}
-
-	return count;
-}
-
-static const struct file_operations ab8500_gpadc_conv_type_fops = {
-	.open = ab8500_gpadc_conv_type_open,
-	.read = seq_read,
-	.write = ab8500_gpadc_conv_type_write,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
-
 /*
  * return length of an ASCII numerical value, 0 is string is not a
  * numerical value.
@@ -2647,7 +2013,6 @@ static const struct file_operations ab8500_hwreg_fops = {
 static int ab8500_debug_probe(struct platform_device *plf)
 {
 	struct dentry *ab8500_dir;
-	struct dentry *ab8500_gpadc_dir;
 	struct ab8500 *ab8500;
 	struct resource *res;
 
@@ -2689,9 +2054,6 @@ static int ab8500_debug_probe(struct platform_device *plf)
 
 	ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
 
-	ab8500_gpadc_dir = debugfs_create_dir(AB8500_ADC_NAME_STRING,
-					      ab8500_dir);
-
 	debugfs_create_file("all-bank-registers", S_IRUGO, ab8500_dir,
 			    &plf->dev, &ab8500_bank_registers_fops);
 	debugfs_create_file("all-banks", S_IRUGO, ab8500_dir,
@@ -2727,83 +2089,6 @@ static int ab8500_debug_probe(struct platform_device *plf)
 			    &plf->dev, &ab8500_hwreg_fops);
 	debugfs_create_file("all-modem-registers", (S_IRUGO | S_IWUSR | S_IWGRP),
 			    ab8500_dir, &plf->dev, &ab8500_modem_fops);
-	debugfs_create_file("bat_ctrl", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_bat_ctrl_fops);
-	debugfs_create_file("btemp_ball", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_btemp_ball_fops);
-	debugfs_create_file("main_charger_v", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_main_charger_v_fops);
-	debugfs_create_file("acc_detect1", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_acc_detect1_fops);
-	debugfs_create_file("acc_detect2", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_acc_detect2_fops);
-	debugfs_create_file("adc_aux1", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_aux1_fops);
-	debugfs_create_file("adc_aux2", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_aux2_fops);
-	debugfs_create_file("main_bat_v", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_main_bat_v_fops);
-	debugfs_create_file("vbus_v", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_vbus_v_fops);
-	debugfs_create_file("main_charger_c", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_main_charger_c_fops);
-	debugfs_create_file("usb_charger_c", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_usb_charger_c_fops);
-	debugfs_create_file("bk_bat_v", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_bk_bat_v_fops);
-	debugfs_create_file("die_temp", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_die_temp_fops);
-	debugfs_create_file("usb_id", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_usb_id_fops);
-	if (is_ab8540(ab8500)) {
-		debugfs_create_file("xtal_temp", (S_IRUGO | S_IWUSR | S_IWGRP),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_xtal_temp_fops);
-		debugfs_create_file("vbattruemeas", (S_IRUGO | S_IWUSR | S_IWGRP),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_vbat_true_meas_fops);
-		debugfs_create_file("batctrl_and_ibat", (S_IRUGO | S_IWUGO),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_bat_ctrl_and_ibat_fops);
-		debugfs_create_file("vbatmeas_and_ibat", (S_IRUGO | S_IWUGO),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_vbat_meas_and_ibat_fops);
-		debugfs_create_file("vbattruemeas_and_ibat", (S_IRUGO | S_IWUGO),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_vbat_true_meas_and_ibat_fops);
-		debugfs_create_file("battemp_and_ibat", (S_IRUGO | S_IWUGO),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_bat_temp_and_ibat_fops);
-		debugfs_create_file("otp_calib", (S_IRUGO | S_IWUSR | S_IWGRP),
-				    ab8500_gpadc_dir, &plf->dev,
-				    &ab8540_gpadc_otp_calib_fops);
-	}
-	debugfs_create_file("avg_sample", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_avg_sample_fops);
-	debugfs_create_file("trig_edge", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_trig_edge_fops);
-	debugfs_create_file("trig_timer", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_trig_timer_fops);
-	debugfs_create_file("conv_type", (S_IRUGO | S_IWUSR | S_IWGRP),
-			    ab8500_gpadc_dir, &plf->dev,
-			    &ab8500_gpadc_conv_type_fops);
 
 	return 0;
 }
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
deleted file mode 100644
index 005f9ee34cd1..000000000000
--- a/drivers/mfd/ab8500-gpadc.c
+++ /dev/null
@@ -1,1075 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) ST-Ericsson SA 2010
- *
- * Author: Arun R Murthy <arun.murthy@stericsson.com>
- * Author: Daniel Willerud <daniel.willerud@stericsson.com>
- * Author: Johan Palsson <johan.palsson@stericsson.com>
- * Author: M'boumba Cedric Madianga
- */
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-#include <linux/pm_runtime.h>
-#include <linux/platform_device.h>
-#include <linux/completion.h>
-#include <linux/regulator/consumer.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/mfd/abx500.h>
-#include <linux/mfd/abx500/ab8500.h>
-#include <linux/mfd/abx500/ab8500-gpadc.h>
-
-/*
- * GPADC register offsets
- * Bank : 0x0A
- */
-#define AB8500_GPADC_CTRL1_REG		0x00
-#define AB8500_GPADC_CTRL2_REG		0x01
-#define AB8500_GPADC_CTRL3_REG		0x02
-#define AB8500_GPADC_AUTO_TIMER_REG	0x03
-#define AB8500_GPADC_STAT_REG		0x04
-#define AB8500_GPADC_MANDATAL_REG	0x05
-#define AB8500_GPADC_MANDATAH_REG	0x06
-#define AB8500_GPADC_AUTODATAL_REG	0x07
-#define AB8500_GPADC_AUTODATAH_REG	0x08
-#define AB8500_GPADC_MUX_CTRL_REG	0x09
-#define AB8540_GPADC_MANDATA2L_REG	0x09
-#define AB8540_GPADC_MANDATA2H_REG	0x0A
-#define AB8540_GPADC_APEAAX_REG		0x10
-#define AB8540_GPADC_APEAAT_REG		0x11
-#define AB8540_GPADC_APEAAM_REG		0x12
-#define AB8540_GPADC_APEAAH_REG		0x13
-#define AB8540_GPADC_APEAAL_REG		0x14
-
-/*
- * OTP register offsets
- * Bank : 0x15
- */
-#define AB8500_GPADC_CAL_1	0x0F
-#define AB8500_GPADC_CAL_2	0x10
-#define AB8500_GPADC_CAL_3	0x11
-#define AB8500_GPADC_CAL_4	0x12
-#define AB8500_GPADC_CAL_5	0x13
-#define AB8500_GPADC_CAL_6	0x14
-#define AB8500_GPADC_CAL_7	0x15
-/* New calibration for 8540 */
-#define AB8540_GPADC_OTP4_REG_7	0x38
-#define AB8540_GPADC_OTP4_REG_6	0x39
-#define AB8540_GPADC_OTP4_REG_5	0x3A
-
-/* gpadc constants */
-#define EN_VINTCORE12		0x04
-#define EN_VTVOUT		0x02
-#define EN_GPADC		0x01
-#define DIS_GPADC		0x00
-#define AVG_1			0x00
-#define AVG_4			0x20
-#define AVG_8			0x40
-#define AVG_16			0x60
-#define ADC_SW_CONV		0x04
-#define EN_ICHAR		0x80
-#define BTEMP_PULL_UP		0x08
-#define EN_BUF			0x40
-#define DIS_ZERO		0x00
-#define GPADC_BUSY		0x01
-#define EN_FALLING		0x10
-#define EN_TRIG_EDGE		0x02
-#define EN_VBIAS_XTAL_TEMP	0x02
-
-/* GPADC constants from AB8500 spec, UM0836 */
-#define ADC_RESOLUTION		1024
-#define ADC_CH_BTEMP_MIN	0
-#define ADC_CH_BTEMP_MAX	1350
-#define ADC_CH_DIETEMP_MIN	0
-#define ADC_CH_DIETEMP_MAX	1350
-#define ADC_CH_CHG_V_MIN	0
-#define ADC_CH_CHG_V_MAX	20030
-#define ADC_CH_ACCDET2_MIN	0
-#define ADC_CH_ACCDET2_MAX	2500
-#define ADC_CH_VBAT_MIN		2300
-#define ADC_CH_VBAT_MAX		4800
-#define ADC_CH_CHG_I_MIN	0
-#define ADC_CH_CHG_I_MAX	1500
-#define ADC_CH_BKBAT_MIN	0
-#define ADC_CH_BKBAT_MAX	3200
-
-/* GPADC constants from AB8540 spec */
-#define ADC_CH_IBAT_MIN		(-6000) /* mA range measured by ADC for ibat */
-#define ADC_CH_IBAT_MAX		6000
-#define ADC_CH_IBAT_MIN_V	(-60)	/* mV range measured by ADC for ibat */
-#define ADC_CH_IBAT_MAX_V	60
-#define IBAT_VDROP_L		(-56)  /* mV */
-#define IBAT_VDROP_H		56
-
-/* This is used to not lose precision when dividing to get gain and offset */
-#define CALIB_SCALE		1000
-/*
- * Number of bits shift used to not lose precision
- * when dividing to get ibat gain.
- */
-#define CALIB_SHIFT_IBAT	20
-
-/* Time in ms before disabling regulator */
-#define GPADC_AUDOSUSPEND_DELAY		1
-
-#define CONVERSION_TIME			500 /* ms */
-
-enum cal_channels {
-	ADC_INPUT_VMAIN = 0,
-	ADC_INPUT_BTEMP,
-	ADC_INPUT_VBAT,
-	ADC_INPUT_IBAT,
-	NBR_CAL_INPUTS,
-};
-
-/**
- * struct adc_cal_data - Table for storing gain and offset for the calibrated
- * ADC channels
- * @gain:		Gain of the ADC channel
- * @offset:		Offset of the ADC channel
- */
-struct adc_cal_data {
-	s64 gain;
-	s64 offset;
-	u16 otp_calib_hi;
-	u16 otp_calib_lo;
-};
-
-/**
- * struct ab8500_gpadc - AB8500 GPADC device information
- * @dev:			pointer to the struct device
- * @node:			a list of AB8500 GPADCs, hence prepared for
-				reentrance
- * @parent:			pointer to the struct ab8500
- * @ab8500_gpadc_complete:	pointer to the struct completion, to indicate
- *				the completion of gpadc conversion
- * @ab8500_gpadc_lock:		structure of type mutex
- * @regu:			pointer to the struct regulator
- * @irq_sw:			interrupt number that is used by gpadc for Sw
- *				conversion
- * @irq_hw:			interrupt number that is used by gpadc for Hw
- *				conversion
- * @cal_data			array of ADC calibration data structs
- */
-struct ab8500_gpadc {
-	struct device *dev;
-	struct list_head node;
-	struct ab8500 *parent;
-	struct completion ab8500_gpadc_complete;
-	struct mutex ab8500_gpadc_lock;
-	struct regulator *regu;
-	int irq_sw;
-	int irq_hw;
-	struct adc_cal_data cal_data[NBR_CAL_INPUTS];
-};
-
-static LIST_HEAD(ab8500_gpadc_list);
-
-/**
- * ab8500_gpadc_get() - returns a reference to the primary AB8500 GPADC
- * (i.e. the first GPADC in the instance list)
- */
-struct ab8500_gpadc *ab8500_gpadc_get(char *name)
-{
-	struct ab8500_gpadc *gpadc;
-
-	list_for_each_entry(gpadc, &ab8500_gpadc_list, node) {
-		if (!strcmp(name, dev_name(gpadc->dev)))
-			return gpadc;
-	}
-
-	return ERR_PTR(-ENOENT);
-}
-EXPORT_SYMBOL(ab8500_gpadc_get);
-
-/**
- * ab8500_gpadc_ad_to_voltage() - Convert a raw ADC value to a voltage
- */
-int ab8500_gpadc_ad_to_voltage(struct ab8500_gpadc *gpadc, u8 channel,
-	int ad_value)
-{
-	int res;
-
-	switch (channel) {
-	case MAIN_CHARGER_V:
-		/* For some reason we don't have calibrated data */
-		if (!gpadc->cal_data[ADC_INPUT_VMAIN].gain) {
-			res = ADC_CH_CHG_V_MIN + (ADC_CH_CHG_V_MAX -
-				ADC_CH_CHG_V_MIN) * ad_value /
-				ADC_RESOLUTION;
-			break;
-		}
-		/* Here we can use the calibrated data */
-		res = (int) (ad_value * gpadc->cal_data[ADC_INPUT_VMAIN].gain +
-			gpadc->cal_data[ADC_INPUT_VMAIN].offset) / CALIB_SCALE;
-		break;
-
-	case XTAL_TEMP:
-	case BAT_CTRL:
-	case BTEMP_BALL:
-	case ACC_DETECT1:
-	case ADC_AUX1:
-	case ADC_AUX2:
-		/* For some reason we don't have calibrated data */
-		if (!gpadc->cal_data[ADC_INPUT_BTEMP].gain) {
-			res = ADC_CH_BTEMP_MIN + (ADC_CH_BTEMP_MAX -
-				ADC_CH_BTEMP_MIN) * ad_value /
-				ADC_RESOLUTION;
-			break;
-		}
-		/* Here we can use the calibrated data */
-		res = (int) (ad_value * gpadc->cal_data[ADC_INPUT_BTEMP].gain +
-			gpadc->cal_data[ADC_INPUT_BTEMP].offset) / CALIB_SCALE;
-		break;
-
-	case MAIN_BAT_V:
-	case VBAT_TRUE_MEAS:
-		/* For some reason we don't have calibrated data */
-		if (!gpadc->cal_data[ADC_INPUT_VBAT].gain) {
-			res = ADC_CH_VBAT_MIN + (ADC_CH_VBAT_MAX -
-				ADC_CH_VBAT_MIN) * ad_value /
-				ADC_RESOLUTION;
-			break;
-		}
-		/* Here we can use the calibrated data */
-		res = (int) (ad_value * gpadc->cal_data[ADC_INPUT_VBAT].gain +
-			gpadc->cal_data[ADC_INPUT_VBAT].offset) / CALIB_SCALE;
-		break;
-
-	case DIE_TEMP:
-		res = ADC_CH_DIETEMP_MIN +
-			(ADC_CH_DIETEMP_MAX - ADC_CH_DIETEMP_MIN) * ad_value /
-			ADC_RESOLUTION;
-		break;
-
-	case ACC_DETECT2:
-		res = ADC_CH_ACCDET2_MIN +
-			(ADC_CH_ACCDET2_MAX - ADC_CH_ACCDET2_MIN) * ad_value /
-			ADC_RESOLUTION;
-		break;
-
-	case VBUS_V:
-		res = ADC_CH_CHG_V_MIN +
-			(ADC_CH_CHG_V_MAX - ADC_CH_CHG_V_MIN) * ad_value /
-			ADC_RESOLUTION;
-		break;
-
-	case MAIN_CHARGER_C:
-	case USB_CHARGER_C:
-		res = ADC_CH_CHG_I_MIN +
-			(ADC_CH_CHG_I_MAX - ADC_CH_CHG_I_MIN) * ad_value /
-			ADC_RESOLUTION;
-		break;
-
-	case BK_BAT_V:
-		res = ADC_CH_BKBAT_MIN +
-			(ADC_CH_BKBAT_MAX - ADC_CH_BKBAT_MIN) * ad_value /
-			ADC_RESOLUTION;
-		break;
-
-	case IBAT_VIRTUAL_CHANNEL:
-		/* For some reason we don't have calibrated data */
-		if (!gpadc->cal_data[ADC_INPUT_IBAT].gain) {
-			res = ADC_CH_IBAT_MIN + (ADC_CH_IBAT_MAX -
-				ADC_CH_IBAT_MIN) * ad_value /
-				ADC_RESOLUTION;
-			break;
-		}
-		/* Here we can use the calibrated data */
-		res = (int) (ad_value * gpadc->cal_data[ADC_INPUT_IBAT].gain +
-				gpadc->cal_data[ADC_INPUT_IBAT].offset)
-				>> CALIB_SHIFT_IBAT;
-		break;
-
-	default:
-		dev_err(gpadc->dev,
-			"unknown channel, not possible to convert\n");
-		res = -EINVAL;
-		break;
-
-	}
-	return res;
-}
-EXPORT_SYMBOL(ab8500_gpadc_ad_to_voltage);
-
-/**
- * ab8500_gpadc_sw_hw_convert() - gpadc conversion
- * @channel:	analog channel to be converted to digital data
- * @avg_sample:  number of ADC sample to average
- * @trig_egde:  selected ADC trig edge
- * @trig_timer: selected ADC trigger delay timer
- * @conv_type: selected conversion type (HW or SW conversion)
- *
- * This function converts the selected analog i/p to digital
- * data.
- */
-int ab8500_gpadc_sw_hw_convert(struct ab8500_gpadc *gpadc, u8 channel,
-		u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type)
-{
-	int ad_value;
-	int voltage;
-
-	ad_value = ab8500_gpadc_read_raw(gpadc, channel, avg_sample,
-			trig_edge, trig_timer, conv_type);
-
-	/* On failure retry a second time */
-	if (ad_value < 0)
-		ad_value = ab8500_gpadc_read_raw(gpadc, channel, avg_sample,
-			trig_edge, trig_timer, conv_type);
-	if (ad_value < 0) {
-		dev_err(gpadc->dev, "GPADC raw value failed ch: %d\n",
-				channel);
-		return ad_value;
-	}
-
-	voltage = ab8500_gpadc_ad_to_voltage(gpadc, channel, ad_value);
-	if (voltage < 0)
-		dev_err(gpadc->dev,
-			"GPADC to voltage conversion failed ch: %d AD: 0x%x\n",
-			channel, ad_value);
-
-	return voltage;
-}
-EXPORT_SYMBOL(ab8500_gpadc_sw_hw_convert);
-
-/**
- * ab8500_gpadc_read_raw() - gpadc read
- * @channel:	analog channel to be read
- * @avg_sample:  number of ADC sample to average
- * @trig_edge:  selected trig edge
- * @trig_timer: selected ADC trigger delay timer
- * @conv_type: selected conversion type (HW or SW conversion)
- *
- * This function obtains the raw ADC value for an hardware conversion,
- * this then needs to be converted by calling ab8500_gpadc_ad_to_voltage()
- */
-int ab8500_gpadc_read_raw(struct ab8500_gpadc *gpadc, u8 channel,
-		u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type)
-{
-	return ab8500_gpadc_double_read_raw(gpadc, channel, avg_sample,
-					    trig_edge, trig_timer, conv_type,
-					    NULL);
-}
-
-int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel,
-		u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type,
-		int *ibat)
-{
-	int ret;
-	int looplimit = 0;
-	unsigned long completion_timeout;
-	u8 val, low_data, high_data, low_data2, high_data2;
-	u8 val_reg1 = 0;
-	unsigned int delay_min = 0;
-	unsigned int delay_max = 0;
-	u8 data_low_addr, data_high_addr;
-
-	if (!gpadc)
-		return -ENODEV;
-
-	/* check if convertion is supported */
-	if ((gpadc->irq_sw < 0) && (conv_type == ADC_SW))
-		return -ENOTSUPP;
-	if ((gpadc->irq_hw < 0) && (conv_type == ADC_HW))
-		return -ENOTSUPP;
-
-	mutex_lock(&gpadc->ab8500_gpadc_lock);
-	/* Enable VTVout LDO this is required for GPADC */
-	pm_runtime_get_sync(gpadc->dev);
-
-	/* Check if ADC is not busy, lock and proceed */
-	do {
-		ret = abx500_get_register_interruptible(gpadc->dev,
-			AB8500_GPADC, AB8500_GPADC_STAT_REG, &val);
-		if (ret < 0)
-			goto out;
-		if (!(val & GPADC_BUSY))
-			break;
-		msleep(20);
-	} while (++looplimit < 10);
-	if (looplimit >= 10 && (val & GPADC_BUSY)) {
-		dev_err(gpadc->dev, "gpadc_conversion: GPADC busy");
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* Enable GPADC */
-	val_reg1 |= EN_GPADC;
-
-	/* Select the channel source and set average samples */
-	switch (avg_sample) {
-	case SAMPLE_1:
-		val = channel | AVG_1;
-		break;
-	case SAMPLE_4:
-		val = channel | AVG_4;
-		break;
-	case SAMPLE_8:
-		val = channel | AVG_8;
-		break;
-	default:
-		val = channel | AVG_16;
-		break;
-	}
-
-	if (conv_type == ADC_HW) {
-		ret = abx500_set_register_interruptible(gpadc->dev,
-				AB8500_GPADC, AB8500_GPADC_CTRL3_REG, val);
-		val_reg1 |= EN_TRIG_EDGE;
-		if (trig_edge)
-			val_reg1 |= EN_FALLING;
-	} else
-		ret = abx500_set_register_interruptible(gpadc->dev,
-				AB8500_GPADC, AB8500_GPADC_CTRL2_REG, val);
-	if (ret < 0) {
-		dev_err(gpadc->dev,
-			"gpadc_conversion: set avg samples failed\n");
-		goto out;
-	}
-
-	/*
-	 * Enable ADC, buffering, select rising edge and enable ADC path
-	 * charging current sense if it needed, ABB 3.0 needs some special
-	 * treatment too.
-	 */
-	switch (channel) {
-	case MAIN_CHARGER_C:
-	case USB_CHARGER_C:
-		val_reg1 |= EN_BUF | EN_ICHAR;
-		break;
-	case BTEMP_BALL:
-		if (!is_ab8500_2p0_or_earlier(gpadc->parent)) {
-			val_reg1 |= EN_BUF | BTEMP_PULL_UP;
-			/*
-			* Delay might be needed for ABB8500 cut 3.0, if not,
-			* remove when hardware will be availible
-			*/
-			delay_min = 1000; /* Delay in micro seconds */
-			delay_max = 10000; /* large range optimises sleepmode */
-			break;
-		}
-		/* Intentional fallthrough */
-	default:
-		val_reg1 |= EN_BUF;
-		break;
-	}
-
-	/* Write configuration to register */
-	ret = abx500_set_register_interruptible(gpadc->dev,
-		AB8500_GPADC, AB8500_GPADC_CTRL1_REG, val_reg1);
-	if (ret < 0) {
-		dev_err(gpadc->dev,
-			"gpadc_conversion: set Control register failed\n");
-		goto out;
-	}
-
-	if (delay_min != 0)
-		usleep_range(delay_min, delay_max);
-
-	if (conv_type == ADC_HW) {
-		/* Set trigger delay timer */
-		ret = abx500_set_register_interruptible(gpadc->dev,
-			AB8500_GPADC, AB8500_GPADC_AUTO_TIMER_REG, trig_timer);
-		if (ret < 0) {
-			dev_err(gpadc->dev,
-				"gpadc_conversion: trig timer failed\n");
-			goto out;
-		}
-		completion_timeout = 2 * HZ;
-		data_low_addr = AB8500_GPADC_AUTODATAL_REG;
-		data_high_addr = AB8500_GPADC_AUTODATAH_REG;
-	} else {
-		/* Start SW conversion */
-		ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
-			AB8500_GPADC, AB8500_GPADC_CTRL1_REG,
-			ADC_SW_CONV, ADC_SW_CONV);
-		if (ret < 0) {
-			dev_err(gpadc->dev,
-				"gpadc_conversion: start s/w conv failed\n");
-			goto out;
-		}
-		completion_timeout = msecs_to_jiffies(CONVERSION_TIME);
-		data_low_addr = AB8500_GPADC_MANDATAL_REG;
-		data_high_addr = AB8500_GPADC_MANDATAH_REG;
-	}
-
-	/* wait for completion of conversion */
-	if (!wait_for_completion_timeout(&gpadc->ab8500_gpadc_complete,
-			completion_timeout)) {
-		dev_err(gpadc->dev,
-			"timeout didn't receive GPADC conv interrupt\n");
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* Read the converted RAW data */
-	ret = abx500_get_register_interruptible(gpadc->dev,
-			AB8500_GPADC, data_low_addr, &low_data);
-	if (ret < 0) {
-		dev_err(gpadc->dev, "gpadc_conversion: read low data failed\n");
-		goto out;
-	}
-
-	ret = abx500_get_register_interruptible(gpadc->dev,
-		AB8500_GPADC, data_high_addr, &high_data);
-	if (ret < 0) {
-		dev_err(gpadc->dev, "gpadc_conversion: read high data failed\n");
-		goto out;
-	}
-
-	/* Check if double convertion is required */
-	if ((channel == BAT_CTRL_AND_IBAT) ||
-			(channel == VBAT_MEAS_AND_IBAT) ||
-			(channel == VBAT_TRUE_MEAS_AND_IBAT) ||
-			(channel == BAT_TEMP_AND_IBAT)) {
-
-		if (conv_type == ADC_HW) {
-			/* not supported */
-			ret = -ENOTSUPP;
-			dev_err(gpadc->dev,
-				"gpadc_conversion: only SW double conversion supported\n");
-			goto out;
-		} else {
-			/* Read the converted RAW data 2 */
-			ret = abx500_get_register_interruptible(gpadc->dev,
-				AB8500_GPADC, AB8540_GPADC_MANDATA2L_REG,
-				&low_data2);
-			if (ret < 0) {
-				dev_err(gpadc->dev,
-					"gpadc_conversion: read sw low data 2 failed\n");
-				goto out;
-			}
-
-			ret = abx500_get_register_interruptible(gpadc->dev,
-				AB8500_GPADC, AB8540_GPADC_MANDATA2H_REG,
-				&high_data2);
-			if (ret < 0) {
-				dev_err(gpadc->dev,
-					"gpadc_conversion: read sw high data 2 failed\n");
-				goto out;
-			}
-			if (ibat != NULL) {
-				*ibat = (high_data2 << 8) | low_data2;
-			} else {
-				dev_warn(gpadc->dev,
-					"gpadc_conversion: ibat not stored\n");
-			}
-
-		}
-	}
-
-	/* Disable GPADC */
-	ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,
-		AB8500_GPADC_CTRL1_REG, DIS_GPADC);
-	if (ret < 0) {
-		dev_err(gpadc->dev, "gpadc_conversion: disable gpadc failed\n");
-		goto out;
-	}
-
-	/* Disable VTVout LDO this is required for GPADC */
-	pm_runtime_mark_last_busy(gpadc->dev);
-	pm_runtime_put_autosuspend(gpadc->dev);
-
-	mutex_unlock(&gpadc->ab8500_gpadc_lock);
-
-	return (high_data << 8) | low_data;
-
-out:
-	/*
-	 * It has shown to be needed to turn off the GPADC if an error occurs,
-	 * otherwise we might have problem when waiting for the busy bit in the
-	 * GPADC status register to go low. In V1.1 there wait_for_completion
-	 * seems to timeout when waiting for an interrupt.. Not seen in V2.0
-	 */
-	(void) abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,
-		AB8500_GPADC_CTRL1_REG, DIS_GPADC);
-	pm_runtime_put(gpadc->dev);
-	mutex_unlock(&gpadc->ab8500_gpadc_lock);
-	dev_err(gpadc->dev,
-		"gpadc_conversion: Failed to AD convert channel %d\n", channel);
-	return ret;
-}
-EXPORT_SYMBOL(ab8500_gpadc_read_raw);
-
-/**
- * ab8500_bm_gpadcconvend_handler() - isr for gpadc conversion completion
- * @irq:	irq number
- * @data:	pointer to the data passed during request irq
- *
- * This is a interrupt service routine for gpadc conversion completion.
- * Notifies the gpadc completion is completed and the converted raw value
- * can be read from the registers.
- * Returns IRQ status(IRQ_HANDLED)
- */
-static irqreturn_t ab8500_bm_gpadcconvend_handler(int irq, void *_gpadc)
-{
-	struct ab8500_gpadc *gpadc = _gpadc;
-
-	complete(&gpadc->ab8500_gpadc_complete);
-
-	return IRQ_HANDLED;
-}
-
-static int otp_cal_regs[] = {
-	AB8500_GPADC_CAL_1,
-	AB8500_GPADC_CAL_2,
-	AB8500_GPADC_CAL_3,
-	AB8500_GPADC_CAL_4,
-	AB8500_GPADC_CAL_5,
-	AB8500_GPADC_CAL_6,
-	AB8500_GPADC_CAL_7,
-};
-
-static int otp4_cal_regs[] = {
-	AB8540_GPADC_OTP4_REG_7,
-	AB8540_GPADC_OTP4_REG_6,
-	AB8540_GPADC_OTP4_REG_5,
-};
-
-static void ab8500_gpadc_read_calibration_data(struct ab8500_gpadc *gpadc)
-{
-	int i;
-	int ret[ARRAY_SIZE(otp_cal_regs)];
-	u8 gpadc_cal[ARRAY_SIZE(otp_cal_regs)];
-	int ret_otp4[ARRAY_SIZE(otp4_cal_regs)];
-	u8 gpadc_otp4[ARRAY_SIZE(otp4_cal_regs)];
-	int vmain_high, vmain_low;
-	int btemp_high, btemp_low;
-	int vbat_high, vbat_low;
-	int ibat_high, ibat_low;
-	s64 V_gain, V_offset, V2A_gain, V2A_offset;
-	struct ab8500 *ab8500;
-
-	ab8500 = gpadc->parent;
-
-	/* First we read all OTP registers and store the error code */
-	for (i = 0; i < ARRAY_SIZE(otp_cal_regs); i++) {
-		ret[i] = abx500_get_register_interruptible(gpadc->dev,
-			AB8500_OTP_EMUL, otp_cal_regs[i],  &gpadc_cal[i]);
-		if (ret[i] < 0)
-			dev_err(gpadc->dev, "%s: read otp reg 0x%02x failed\n",
-				__func__, otp_cal_regs[i]);
-	}
-
-	/*
-	 * The ADC calibration data is stored in OTP registers.
-	 * The layout of the calibration data is outlined below and a more
-	 * detailed description can be found in UM0836
-	 *
-	 * vm_h/l = vmain_high/low
-	 * bt_h/l = btemp_high/low
-	 * vb_h/l = vbat_high/low
-	 *
-	 * Data bits 8500/9540:
-	 * | 7	   | 6	   | 5	   | 4	   | 3	   | 2	   | 1	   | 0
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * |						   | vm_h9 | vm_h8
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * |		   | vm_h7 | vm_h6 | vm_h5 | vm_h4 | vm_h3 | vm_h2
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vm_h1 | vm_h0 | vm_l4 | vm_l3 | vm_l2 | vm_l1 | vm_l0 | bt_h9
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | bt_h8 | bt_h7 | bt_h6 | bt_h5 | bt_h4 | bt_h3 | bt_h2 | bt_h1
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | bt_h0 | bt_l4 | bt_l3 | bt_l2 | bt_l1 | bt_l0 | vb_h9 | vb_h8
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vb_h7 | vb_h6 | vb_h5 | vb_h4 | vb_h3 | vb_h2 | vb_h1 | vb_h0
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vb_l5 | vb_l4 | vb_l3 | vb_l2 | vb_l1 | vb_l0 |
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 *
-	 * Data bits 8540:
-	 * OTP2
-	 * | 7	   | 6	   | 5	   | 4	   | 3	   | 2	   | 1	   | 0
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * |
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vm_h9 | vm_h8 | vm_h7 | vm_h6 | vm_h5 | vm_h4 | vm_h3 | vm_h2
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vm_h1 | vm_h0 | vm_l4 | vm_l3 | vm_l2 | vm_l1 | vm_l0 | bt_h9
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | bt_h8 | bt_h7 | bt_h6 | bt_h5 | bt_h4 | bt_h3 | bt_h2 | bt_h1
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | bt_h0 | bt_l4 | bt_l3 | bt_l2 | bt_l1 | bt_l0 | vb_h9 | vb_h8
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vb_h7 | vb_h6 | vb_h5 | vb_h4 | vb_h3 | vb_h2 | vb_h1 | vb_h0
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | vb_l5 | vb_l4 | vb_l3 | vb_l2 | vb_l1 | vb_l0 |
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 *
-	 * Data bits 8540:
-	 * OTP4
-	 * | 7	   | 6	   | 5	   | 4	   | 3	   | 2	   | 1	   | 0
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * |					   | ib_h9 | ib_h8 | ib_h7
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | ib_h6 | ib_h5 | ib_h4 | ib_h3 | ib_h2 | ib_h1 | ib_h0 | ib_l5
-	 * |.......|.......|.......|.......|.......|.......|.......|.......
-	 * | ib_l4 | ib_l3 | ib_l2 | ib_l1 | ib_l0 |
-	 *
-	 *
-	 * Ideal output ADC codes corresponding to injected input voltages
-	 * during manufacturing is:
-	 *
-	 * vmain_high: Vin = 19500mV / ADC ideal code = 997
-	 * vmain_low:  Vin = 315mV   / ADC ideal code = 16
-	 * btemp_high: Vin = 1300mV  / ADC ideal code = 985
-	 * btemp_low:  Vin = 21mV    / ADC ideal code = 16
-	 * vbat_high:  Vin = 4700mV  / ADC ideal code = 982
-	 * vbat_low:   Vin = 2380mV  / ADC ideal code = 33
-	 */
-
-	if (is_ab8540(ab8500)) {
-		/* Calculate gain and offset for VMAIN if all reads succeeded*/
-		if (!(ret[1] < 0 || ret[2] < 0)) {
-			vmain_high = (((gpadc_cal[1] & 0xFF) << 2) |
-				((gpadc_cal[2] & 0xC0) >> 6));
-			vmain_low = ((gpadc_cal[2] & 0x3E) >> 1);
-
-			gpadc->cal_data[ADC_INPUT_VMAIN].otp_calib_hi =
-				(u16)vmain_high;
-			gpadc->cal_data[ADC_INPUT_VMAIN].otp_calib_lo =
-				(u16)vmain_low;
-
-			gpadc->cal_data[ADC_INPUT_VMAIN].gain = CALIB_SCALE *
-				(19500 - 315) / (vmain_high - vmain_low);
-			gpadc->cal_data[ADC_INPUT_VMAIN].offset = CALIB_SCALE *
-				19500 - (CALIB_SCALE * (19500 - 315) /
-				(vmain_high - vmain_low)) * vmain_high;
-		} else {
-		gpadc->cal_data[ADC_INPUT_VMAIN].gain = 0;
-		}
-
-		/* Read IBAT calibration Data */
-		for (i = 0; i < ARRAY_SIZE(otp4_cal_regs); i++) {
-			ret_otp4[i] = abx500_get_register_interruptible(
-					gpadc->dev, AB8500_OTP_EMUL,
-					otp4_cal_regs[i],  &gpadc_otp4[i]);
-			if (ret_otp4[i] < 0)
-				dev_err(gpadc->dev,
-					"%s: read otp4 reg 0x%02x failed\n",
-					__func__, otp4_cal_regs[i]);
-		}
-
-		/* Calculate gain and offset for IBAT if all reads succeeded */
-		if (!(ret_otp4[0] < 0 || ret_otp4[1] < 0 || ret_otp4[2] < 0)) {
-			ibat_high = (((gpadc_otp4[0] & 0x07) << 7) |
-				((gpadc_otp4[1] & 0xFE) >> 1));
-			ibat_low = (((gpadc_otp4[1] & 0x01) << 5) |
-				((gpadc_otp4[2] & 0xF8) >> 3));
-
-			gpadc->cal_data[ADC_INPUT_IBAT].otp_calib_hi =
-				(u16)ibat_high;
-			gpadc->cal_data[ADC_INPUT_IBAT].otp_calib_lo =
-				(u16)ibat_low;
-
-			V_gain = ((IBAT_VDROP_H - IBAT_VDROP_L)
-				<< CALIB_SHIFT_IBAT) / (ibat_high - ibat_low);
-
-			V_offset = (IBAT_VDROP_H << CALIB_SHIFT_IBAT) -
-				(((IBAT_VDROP_H - IBAT_VDROP_L) <<
-				CALIB_SHIFT_IBAT) / (ibat_high - ibat_low))
-				* ibat_high;
-			/*
-			 * Result obtained is in mV (at a scale factor),
-			 * we need to calculate gain and offset to get mA
-			 */
-			V2A_gain = (ADC_CH_IBAT_MAX - ADC_CH_IBAT_MIN)/
-				(ADC_CH_IBAT_MAX_V - ADC_CH_IBAT_MIN_V);
-			V2A_offset = ((ADC_CH_IBAT_MAX_V * ADC_CH_IBAT_MIN -
-				ADC_CH_IBAT_MAX * ADC_CH_IBAT_MIN_V)
-				<< CALIB_SHIFT_IBAT)
-				/ (ADC_CH_IBAT_MAX_V - ADC_CH_IBAT_MIN_V);
-
-			gpadc->cal_data[ADC_INPUT_IBAT].gain =
-				V_gain * V2A_gain;
-			gpadc->cal_data[ADC_INPUT_IBAT].offset =
-				V_offset * V2A_gain + V2A_offset;
-		} else {
-			gpadc->cal_data[ADC_INPUT_IBAT].gain = 0;
-		}
-
-		dev_dbg(gpadc->dev, "IBAT gain %llu offset %llu\n",
-			gpadc->cal_data[ADC_INPUT_IBAT].gain,
-			gpadc->cal_data[ADC_INPUT_IBAT].offset);
-	} else {
-		/* Calculate gain and offset for VMAIN if all reads succeeded */
-		if (!(ret[0] < 0 || ret[1] < 0 || ret[2] < 0)) {
-			vmain_high = (((gpadc_cal[0] & 0x03) << 8) |
-				((gpadc_cal[1] & 0x3F) << 2) |
-				((gpadc_cal[2] & 0xC0) >> 6));
-			vmain_low = ((gpadc_cal[2] & 0x3E) >> 1);
-
-			gpadc->cal_data[ADC_INPUT_VMAIN].otp_calib_hi =
-				(u16)vmain_high;
-			gpadc->cal_data[ADC_INPUT_VMAIN].otp_calib_lo =
-				(u16)vmain_low;
-
-			gpadc->cal_data[ADC_INPUT_VMAIN].gain = CALIB_SCALE *
-				(19500 - 315) / (vmain_high - vmain_low);
-
-			gpadc->cal_data[ADC_INPUT_VMAIN].offset = CALIB_SCALE *
-				19500 - (CALIB_SCALE * (19500 - 315) /
-				(vmain_high - vmain_low)) * vmain_high;
-		} else {
-			gpadc->cal_data[ADC_INPUT_VMAIN].gain = 0;
-		}
-	}
-
-	/* Calculate gain and offset for BTEMP if all reads succeeded */
-	if (!(ret[2] < 0 || ret[3] < 0 || ret[4] < 0)) {
-		btemp_high = (((gpadc_cal[2] & 0x01) << 9) |
-			(gpadc_cal[3] << 1) | ((gpadc_cal[4] & 0x80) >> 7));
-		btemp_low = ((gpadc_cal[4] & 0x7C) >> 2);
-
-		gpadc->cal_data[ADC_INPUT_BTEMP].otp_calib_hi = (u16)btemp_high;
-		gpadc->cal_data[ADC_INPUT_BTEMP].otp_calib_lo = (u16)btemp_low;
-
-		gpadc->cal_data[ADC_INPUT_BTEMP].gain =
-			CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low);
-		gpadc->cal_data[ADC_INPUT_BTEMP].offset = CALIB_SCALE * 1300 -
-			(CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low))
-			* btemp_high;
-	} else {
-		gpadc->cal_data[ADC_INPUT_BTEMP].gain = 0;
-	}
-
-	/* Calculate gain and offset for VBAT if all reads succeeded */
-	if (!(ret[4] < 0 || ret[5] < 0 || ret[6] < 0)) {
-		vbat_high = (((gpadc_cal[4] & 0x03) << 8) | gpadc_cal[5]);
-		vbat_low = ((gpadc_cal[6] & 0xFC) >> 2);
-
-		gpadc->cal_data[ADC_INPUT_VBAT].otp_calib_hi = (u16)vbat_high;
-		gpadc->cal_data[ADC_INPUT_VBAT].otp_calib_lo = (u16)vbat_low;
-
-		gpadc->cal_data[ADC_INPUT_VBAT].gain = CALIB_SCALE *
-			(4700 - 2380) /	(vbat_high - vbat_low);
-		gpadc->cal_data[ADC_INPUT_VBAT].offset = CALIB_SCALE * 4700 -
-			(CALIB_SCALE * (4700 - 2380) /
-			(vbat_high - vbat_low)) * vbat_high;
-	} else {
-		gpadc->cal_data[ADC_INPUT_VBAT].gain = 0;
-	}
-
-	dev_dbg(gpadc->dev, "VMAIN gain %llu offset %llu\n",
-		gpadc->cal_data[ADC_INPUT_VMAIN].gain,
-		gpadc->cal_data[ADC_INPUT_VMAIN].offset);
-
-	dev_dbg(gpadc->dev, "BTEMP gain %llu offset %llu\n",
-		gpadc->cal_data[ADC_INPUT_BTEMP].gain,
-		gpadc->cal_data[ADC_INPUT_BTEMP].offset);
-
-	dev_dbg(gpadc->dev, "VBAT gain %llu offset %llu\n",
-		gpadc->cal_data[ADC_INPUT_VBAT].gain,
-		gpadc->cal_data[ADC_INPUT_VBAT].offset);
-}
-
-#ifdef CONFIG_PM
-static int ab8500_gpadc_runtime_suspend(struct device *dev)
-{
-	struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
-
-	regulator_disable(gpadc->regu);
-	return 0;
-}
-
-static int ab8500_gpadc_runtime_resume(struct device *dev)
-{
-	struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
-	int ret;
-
-	ret = regulator_enable(gpadc->regu);
-	if (ret)
-		dev_err(dev, "Failed to enable vtvout LDO: %d\n", ret);
-	return ret;
-}
-#endif
-
-#ifdef CONFIG_PM_SLEEP
-static int ab8500_gpadc_suspend(struct device *dev)
-{
-	struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
-
-	mutex_lock(&gpadc->ab8500_gpadc_lock);
-
-	pm_runtime_get_sync(dev);
-
-	regulator_disable(gpadc->regu);
-	return 0;
-}
-
-static int ab8500_gpadc_resume(struct device *dev)
-{
-	struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
-	int ret;
-
-	ret = regulator_enable(gpadc->regu);
-	if (ret)
-		dev_err(dev, "Failed to enable vtvout LDO: %d\n", ret);
-
-	pm_runtime_mark_last_busy(gpadc->dev);
-	pm_runtime_put_autosuspend(gpadc->dev);
-
-	mutex_unlock(&gpadc->ab8500_gpadc_lock);
-	return ret;
-}
-#endif
-
-static int ab8500_gpadc_probe(struct platform_device *pdev)
-{
-	int ret = 0;
-	struct ab8500_gpadc *gpadc;
-
-	gpadc = devm_kzalloc(&pdev->dev,
-			     sizeof(struct ab8500_gpadc), GFP_KERNEL);
-	if (!gpadc)
-		return -ENOMEM;
-
-	gpadc->irq_sw = platform_get_irq_byname(pdev, "SW_CONV_END");
-	if (gpadc->irq_sw < 0)
-		dev_err(gpadc->dev, "failed to get platform sw_conv_end irq\n");
-
-	gpadc->irq_hw = platform_get_irq_byname(pdev, "HW_CONV_END");
-	if (gpadc->irq_hw < 0)
-		dev_err(gpadc->dev, "failed to get platform hw_conv_end irq\n");
-
-	gpadc->dev = &pdev->dev;
-	gpadc->parent = dev_get_drvdata(pdev->dev.parent);
-	mutex_init(&gpadc->ab8500_gpadc_lock);
-
-	/* Initialize completion used to notify completion of conversion */
-	init_completion(&gpadc->ab8500_gpadc_complete);
-
-	/* Register interrupts */
-	if (gpadc->irq_sw >= 0) {
-		ret = request_threaded_irq(gpadc->irq_sw, NULL,
-			ab8500_bm_gpadcconvend_handler,
-			IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
-			"ab8500-gpadc-sw",
-			gpadc);
-		if (ret < 0) {
-			dev_err(gpadc->dev,
-				"Failed to register interrupt irq: %d\n",
-				gpadc->irq_sw);
-			goto fail;
-		}
-	}
-
-	if (gpadc->irq_hw >= 0) {
-		ret = request_threaded_irq(gpadc->irq_hw, NULL,
-			ab8500_bm_gpadcconvend_handler,
-			IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
-			"ab8500-gpadc-hw",
-			gpadc);
-		if (ret < 0) {
-			dev_err(gpadc->dev,
-				"Failed to register interrupt irq: %d\n",
-				gpadc->irq_hw);
-			goto fail_irq;
-		}
-	}
-
-	/* VTVout LDO used to power up ab8500-GPADC */
-	gpadc->regu = devm_regulator_get(&pdev->dev, "vddadc");
-	if (IS_ERR(gpadc->regu)) {
-		ret = PTR_ERR(gpadc->regu);
-		dev_err(gpadc->dev, "failed to get vtvout LDO\n");
-		goto fail_irq;
-	}
-
-	platform_set_drvdata(pdev, gpadc);
-
-	ret = regulator_enable(gpadc->regu);
-	if (ret) {
-		dev_err(gpadc->dev, "Failed to enable vtvout LDO: %d\n", ret);
-		goto fail_enable;
-	}
-
-	pm_runtime_set_autosuspend_delay(gpadc->dev, GPADC_AUDOSUSPEND_DELAY);
-	pm_runtime_use_autosuspend(gpadc->dev);
-	pm_runtime_set_active(gpadc->dev);
-	pm_runtime_enable(gpadc->dev);
-
-	ab8500_gpadc_read_calibration_data(gpadc);
-	list_add_tail(&gpadc->node, &ab8500_gpadc_list);
-	dev_dbg(gpadc->dev, "probe success\n");
-
-	return 0;
-
-fail_enable:
-fail_irq:
-	free_irq(gpadc->irq_sw, gpadc);
-	free_irq(gpadc->irq_hw, gpadc);
-fail:
-	return ret;
-}
-
-static int ab8500_gpadc_remove(struct platform_device *pdev)
-{
-	struct ab8500_gpadc *gpadc = platform_get_drvdata(pdev);
-
-	/* remove this gpadc entry from the list */
-	list_del(&gpadc->node);
-	/* remove interrupt  - completion of Sw ADC conversion */
-	if (gpadc->irq_sw >= 0)
-		free_irq(gpadc->irq_sw, gpadc);
-	if (gpadc->irq_hw >= 0)
-		free_irq(gpadc->irq_hw, gpadc);
-
-	pm_runtime_get_sync(gpadc->dev);
-	pm_runtime_disable(gpadc->dev);
-
-	regulator_disable(gpadc->regu);
-
-	pm_runtime_set_suspended(gpadc->dev);
-
-	pm_runtime_put_noidle(gpadc->dev);
-
-	return 0;
-}
-
-static const struct dev_pm_ops ab8500_gpadc_pm_ops = {
-	SET_RUNTIME_PM_OPS(ab8500_gpadc_runtime_suspend,
-			   ab8500_gpadc_runtime_resume,
-			   NULL)
-	SET_SYSTEM_SLEEP_PM_OPS(ab8500_gpadc_suspend,
-				ab8500_gpadc_resume)
-
-};
-
-static struct platform_driver ab8500_gpadc_driver = {
-	.probe = ab8500_gpadc_probe,
-	.remove = ab8500_gpadc_remove,
-	.driver = {
-		.name = "ab8500-gpadc",
-		.pm = &ab8500_gpadc_pm_ops,
-	},
-};
-
-static int __init ab8500_gpadc_init(void)
-{
-	return platform_driver_register(&ab8500_gpadc_driver);
-}
-subsys_initcall_sync(ab8500_gpadc_init);
-
-/**
- * ab8540_gpadc_get_otp() - returns OTP values
- *
- */
-void ab8540_gpadc_get_otp(struct ab8500_gpadc *gpadc,
-			u16 *vmain_l, u16 *vmain_h, u16 *btemp_l, u16 *btemp_h,
-			u16 *vbat_l, u16 *vbat_h, u16 *ibat_l, u16 *ibat_h)
-{
-	*vmain_l = gpadc->cal_data[ADC_INPUT_VMAIN].otp_calib_lo;
-	*vmain_h = gpadc->cal_data[ADC_INPUT_VMAIN].otp_calib_hi;
-	*btemp_l = gpadc->cal_data[ADC_INPUT_BTEMP].otp_calib_lo;
-	*btemp_h = gpadc->cal_data[ADC_INPUT_BTEMP].otp_calib_hi;
-	*vbat_l  = gpadc->cal_data[ADC_INPUT_VBAT].otp_calib_lo;
-	*vbat_h  = gpadc->cal_data[ADC_INPUT_VBAT].otp_calib_hi;
-	*ibat_l  = gpadc->cal_data[ADC_INPUT_IBAT].otp_calib_lo;
-	*ibat_h  = gpadc->cal_data[ADC_INPUT_IBAT].otp_calib_hi;
-}
diff --git a/include/linux/mfd/abx500/ab8500-gpadc.h b/include/linux/mfd/abx500/ab8500-gpadc.h
deleted file mode 100644
index 836c944abe2e..000000000000
--- a/include/linux/mfd/abx500/ab8500-gpadc.h
+++ /dev/null
@@ -1,75 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2010 ST-Ericsson SA
- *
- * Author: Arun R Murthy <arun.murthy@stericsson.com>
- * Author: Daniel Willerud <daniel.willerud@stericsson.com>
- * Author: M'boumba Cedric Madianga <cedric.madianga@stericsson.com>
- */
-
-#ifndef	_AB8500_GPADC_H
-#define _AB8500_GPADC_H
-
-/* GPADC source: From datasheet(ADCSwSel[4:0] in GPADCCtrl2
- * and ADCHwSel[4:0] in GPADCCtrl3 ) */
-#define BAT_CTRL		0x01
-#define BTEMP_BALL		0x02
-#define MAIN_CHARGER_V		0x03
-#define ACC_DETECT1		0x04
-#define ACC_DETECT2		0x05
-#define ADC_AUX1		0x06
-#define ADC_AUX2		0x07
-#define MAIN_BAT_V		0x08
-#define VBUS_V			0x09
-#define MAIN_CHARGER_C		0x0A
-#define USB_CHARGER_C		0x0B
-#define BK_BAT_V		0x0C
-#define DIE_TEMP		0x0D
-#define USB_ID			0x0E
-#define XTAL_TEMP		0x12
-#define VBAT_TRUE_MEAS		0x13
-#define BAT_CTRL_AND_IBAT	0x1C
-#define VBAT_MEAS_AND_IBAT	0x1D
-#define VBAT_TRUE_MEAS_AND_IBAT	0x1E
-#define BAT_TEMP_AND_IBAT	0x1F
-
-/* Virtual channel used only for ibat convertion to ampere
- * Battery current conversion (ibat) cannot be requested as a single conversion
- *  but it is always in combination with other input requests
- */
-#define IBAT_VIRTUAL_CHANNEL		0xFF
-
-#define SAMPLE_1        1
-#define SAMPLE_4        4
-#define SAMPLE_8        8
-#define SAMPLE_16       16
-#define RISING_EDGE     0
-#define FALLING_EDGE    1
-
-/* Arbitrary ADC conversion type constants */
-#define ADC_SW				0
-#define ADC_HW				1
-
-struct ab8500_gpadc;
-
-struct ab8500_gpadc *ab8500_gpadc_get(char *name);
-int ab8500_gpadc_sw_hw_convert(struct ab8500_gpadc *gpadc, u8 channel,
-		u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type);
-static inline int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 channel)
-{
-	return ab8500_gpadc_sw_hw_convert(gpadc, channel,
-			SAMPLE_16, 0, 0, ADC_SW);
-}
-
-int ab8500_gpadc_read_raw(struct ab8500_gpadc *gpadc, u8 channel,
-		u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type);
-int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel,
-		u8 avg_sample, u8 trig_edge, u8 trig_timer, u8 conv_type,
-		int *ibat);
-int ab8500_gpadc_ad_to_voltage(struct ab8500_gpadc *gpadc,
-		u8 channel, int ad_value);
-void ab8540_gpadc_get_otp(struct ab8500_gpadc *gpadc,
-			u16 *vmain_l, u16 *vmain_h, u16 *btemp_l, u16 *btemp_h,
-			u16 *vbat_l, u16 *vbat_h, u16 *ibat_l, u16 *ibat_h);
-
-#endif /* _AB8500_GPADC_H */
-- 
2.21.0


^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH 5/7 v3] mfd: ab8500: augment DT bindings
  2019-10-01 22:13 ` [PATCH 5/7 v3] mfd: ab8500: augment DT bindings Linus Walleij
@ 2019-10-06 10:57   ` Jonathan Cameron
  2019-10-10 18:39   ` Rob Herring
  1 sibling, 0 replies; 12+ messages in thread
From: Jonathan Cameron @ 2019-10-06 10:57 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, linux-iio, Hartmut Knaack, Lars-Peter Clausen,
	Peter Meerwald-Stadler, Mboumba Cedric Madianga, devicetree,
	Rob Herring, Mark Rutland

On Wed,  2 Oct 2019 00:13:54 +0200
Linus Walleij <linus.walleij@linaro.org> wrote:

> As we migrate the AB8500 GPADC driver to use IIO, we need to augment
> the bindings to account for defining the ADC channels in the device
> tree.
> 
> Cc: devicetree@vger.kernel.org
> Acked-by: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

This looks good now as far as our generic channel bindings go.
I'd like to leave it a little longer for Rob or Mark to have the chance
to comment before taking it though.

Good to have these in yaml at some point as well :)
I know we haven't done many of the older IIO bindings yet though
so I can't really talk.

Thanks,

Jonathan

> ---
> ChangeLog v2->v3:
> - Change "adc-channel@" to "channel@" as per preferred notation.
> - Add some full stops to the end of sentences.
> - Reference the new ADC-specific documentation for channel specifier
>   etc.
> - Collect Lee's ACK.
> - Rebased on v5.4-rc1
> ChangeLog v1->v2:
> - Rebased on v5.3-rc5
> ---
>  .../devicetree/bindings/mfd/ab8500.txt        | 119 ++++++++++++++++++
>  1 file changed, 119 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ab8500.txt b/Documentation/devicetree/bindings/mfd/ab8500.txt
> index cd9e90c5d171..ff517e5d7ee0 100644
> --- a/Documentation/devicetree/bindings/mfd/ab8500.txt
> +++ b/Documentation/devicetree/bindings/mfd/ab8500.txt
> @@ -69,6 +69,18 @@ Required child device properties:
>  - compatible             : "stericsson,ab8500-[bm|btemp|charger|fg|gpadc|gpio|ponkey|
>                                                 pwm|regulator|rtc|sysctrl|usb]";
>  
> +  A few child devices require ADC channels from the GPADC node. Those follow the
> +  standard bindings from iio/iio-bindings.txt and iio/adc/adc.txt
> +
> +  abx500-temp		 : io-channels "aux1" and "aux2" for measuring external
> +			   temperatures.
> +  ab8500_fg		 : io-channel "main_bat_v" for measuring main battery voltage,
> +  ab8500_btemp		 : io-channels "btemp_ball" and "bat_ctrl" for measuring the
> +			   battery voltage.
> +  ab8500_charger	 : io-channels "main_charger_v", "main_charger_c", "vbus_v",
> +			   "usb_charger_c" for measuring voltage and current of the
> +			   different charging supplies.
> +
>  Optional child device properties:
>  - interrupts             : contains the device IRQ(s) using the 2-cell format (see above)
>  - interrupt-names        : contains names of IRQ resource in the order in which they were
> @@ -102,8 +114,115 @@ ab8500 {
>                                39 0x4>;
>                  interrupt-names = "HW_CONV_END", "SW_CONV_END";
>                  vddadc-supply = <&ab8500_ldo_tvout_reg>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		#io-channel-cells = <1>;
> +
> +		/* GPADC channels */
> +		bat_ctrl: channel@01 {
> +			reg = <0x01>;
> +		};
> +		btemp_ball: channel@02 {
> +			reg = <0x02>;
> +		};
> +		main_charger_v: channel@03 {
> +			reg = <0x03>;
> +		};
> +		acc_detect1: channel@04 {
> +			reg = <0x04>;
> +		};
> +		acc_detect2: channel@05 {
> +			reg = <0x05>;
> +		};
> +		adc_aux1: channel@06 {
> +			reg = <0x06>;
> +		};
> +		adc_aux2: channel@07 {
> +			reg = <0x07>;
> +		};
> +		main_batt_v: channel@08 {
> +			reg = <0x08>;
> +		};
> +		vbus_v: channel@09 {
> +			reg = <0x09>;
> +		};
> +		main_charger_c: channel@0a {
> +			reg = <0x0a>;
> +		};
> +		usb_charger_c: channel@0b {
> +			reg = <0x0b>;
> +		};
> +		bk_bat_v: channel@0c {
> +			reg = <0x0c>;
> +		};
> +		die_temp: channel@0d {
> +			reg = <0x0d>;
> +		};
> +		usb_id: channel@0e {
> +			reg = <0x0e>;
> +		};
> +		xtal_temp: channel@12 {
> +			reg = <0x12>;
> +		};
> +		vbat_true_meas: channel@13 {
> +			reg = <0x13>;
> +		};
> +		bat_ctrl_and_ibat: channel@1c {
> +			reg = <0x1c>;
> +		};
> +		vbat_meas_and_ibat: channel@1d {
> +			reg = <0x1d>;
> +		};
> +		vbat_true_meas_and_ibat: channel@1e {
> +			reg = <0x1e>;
> +		};
> +		bat_temp_and_ibat: channel@1f {
> +			reg = <0x1f>;
> +		};
>          };
>  
> +	ab8500_temp {
> +		compatible = "stericsson,abx500-temp";
> +		io-channels = <&gpadc 0x06>,
> +			      <&gpadc 0x07>;
> +		io-channel-name = "aux1", "aux2";
> +	};
> +
> +	ab8500_battery: ab8500_battery {
> +		stericsson,battery-type = "LIPO";
> +		thermistor-on-batctrl;
> +	};
> +
> +	ab8500_fg {
> +		compatible = "stericsson,ab8500-fg";
> +		battery	   = <&ab8500_battery>;
> +		io-channels = <&gpadc 0x08>;
> +		io-channel-name = "main_bat_v";
> +	};
> +
> +	ab8500_btemp {
> +		compatible = "stericsson,ab8500-btemp";
> +		battery	   = <&ab8500_battery>;
> +		io-channels = <&gpadc 0x02>,
> +			      <&gpadc 0x01>;
> +		io-channel-name = "btemp_ball",
> +				"bat_ctrl";
> +	};
> +
> +	ab8500_charger {
> +		compatible	= "stericsson,ab8500-charger";
> +		battery		= <&ab8500_battery>;
> +		vddadc-supply	= <&ab8500_ldo_tvout_reg>;
> +		io-channels = <&gpadc 0x03>,
> +			      <&gpadc 0x0a>,
> +			      <&gpadc 0x09>,
> +			      <&gpadc 0x0b>;
> +		io-channel-name = "main_charger_v",
> +				"main_charger_c",
> +				"vbus_v",
> +				"usb_charger_c";
> +	};
> +
>          ab8500-usb {
>                  compatible = "stericsson,ab8500-usb";
>                  interrupts = < 90 0x4


^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion
  2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
                   ` (6 preceding siblings ...)
  2019-10-01 22:13 ` [PATCH 7/7 v3] mfd: Switch the AB8500 GPADC to IIO Linus Walleij
@ 2019-10-06 11:00 ` Jonathan Cameron
  7 siblings, 0 replies; 12+ messages in thread
From: Jonathan Cameron @ 2019-10-06 11:00 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, linux-iio, Hartmut Knaack, Lars-Peter Clausen,
	Peter Meerwald-Stadler, Mboumba Cedric Madianga

On Wed,  2 Oct 2019 00:13:49 +0200
Linus Walleij <linus.walleij@linaro.org> wrote:

> This version should cover Jonathans comments on v2 and
> be ripe for early merge for v5.5.
> 
> Jonathan, do you want to queue them in your tree?
> 
> When Lee applies series like this he usually puts them
> on an isolated immutable branch that he then pulls
> into his own tree and offer to other subsystems.
> It's a good idea I think but maybe you have other
> ways of working.
My tree is lagging a bit at the moment, so I'll wait until
I am based on something after 5.4-rc1 (probably next weekend)
then do an immutable branch based on that.
I have a few other bits waiting for that rebase, so hopefully
I'm remember them all. Give me a shout if I seem to have forgotten.
The jet lag excuse is now nearly gone so it'll just be me being
useless :)

Also, this gives a bit more time for Rob or Mark to sanity check the dt
bindings if they want to.

Thanks,

Jonathan
> 
> Linus Walleij (7):
>   power: supply: ab8500_btemp: convert to IIO ADC
>   power: supply: ab8500_charger: convert to IIO ADC
>   power: supply: ab8500_fg: convert to IIO ADC
>   hwmon: ab8500: convert to IIO ADC
>   mfd: ab8500: augment DT bindings
>   iio: adc: New driver for the AB8500 GPADC
>   mfd: Switch the AB8500 GPADC to IIO
> 
>  .../devicetree/bindings/mfd/ab8500.txt        |  119 ++
>  MAINTAINERS                                   |    1 +
>  drivers/hwmon/Kconfig                         |    3 +-
>  drivers/hwmon/ab8500.c                        |   65 +-
>  drivers/iio/adc/Kconfig                       |   10 +
>  drivers/iio/adc/Makefile                      |    1 +
>  drivers/iio/adc/ab8500-gpadc.c                | 1218 +++++++++++++++++
>  drivers/mfd/Kconfig                           |    7 -
>  drivers/mfd/Makefile                          |    1 -
>  drivers/mfd/ab8500-debugfs.c                  |  715 ----------
>  drivers/mfd/ab8500-gpadc.c                    | 1075 ---------------
>  drivers/power/supply/Kconfig                  |    2 +-
>  drivers/power/supply/ab8500_btemp.c           |   41 +-
>  drivers/power/supply/ab8500_charger.c         |   78 +-
>  drivers/power/supply/ab8500_fg.c              |   23 +-
>  include/linux/mfd/abx500/ab8500-gpadc.h       |   75 -
>  16 files changed, 1495 insertions(+), 1939 deletions(-)
>  create mode 100644 drivers/iio/adc/ab8500-gpadc.c
>  delete mode 100644 drivers/mfd/ab8500-gpadc.c
>  delete mode 100644 include/linux/mfd/abx500/ab8500-gpadc.h
> 


^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH 5/7 v3] mfd: ab8500: augment DT bindings
  2019-10-01 22:13 ` [PATCH 5/7 v3] mfd: ab8500: augment DT bindings Linus Walleij
  2019-10-06 10:57   ` Jonathan Cameron
@ 2019-10-10 18:39   ` Rob Herring
  2019-10-11  7:07     ` Linus Walleij
  1 sibling, 1 reply; 12+ messages in thread
From: Rob Herring @ 2019-10-10 18:39 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler,
	Mboumba Cedric Madianga, devicetree

On Wed, Oct 02, 2019 at 12:13:54AM +0200, Linus Walleij wrote:
> As we migrate the AB8500 GPADC driver to use IIO, we need to augment
> the bindings to account for defining the ADC channels in the device
> tree.
> 
> Cc: devicetree@vger.kernel.org
> Acked-by: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v2->v3:
> - Change "adc-channel@" to "channel@" as per preferred notation.
> - Add some full stops to the end of sentences.
> - Reference the new ADC-specific documentation for channel specifier
>   etc.
> - Collect Lee's ACK.
> - Rebased on v5.4-rc1

Humm, this is the 2nd v3. Can you address my comments in the 1st v3 you 
sent[1].

> ChangeLog v1->v2:
> - Rebased on v5.3-rc5
> ---
>  .../devicetree/bindings/mfd/ab8500.txt        | 119 ++++++++++++++++++
>  1 file changed, 119 insertions(+)


[1] https://lore.kernel.org/linux-iio/20190903180034.GA20595@bogus/

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH 5/7 v3] mfd: ab8500: augment DT bindings
  2019-10-10 18:39   ` Rob Herring
@ 2019-10-11  7:07     ` Linus Walleij
  0 siblings, 0 replies; 12+ messages in thread
From: Linus Walleij @ 2019-10-11  7:07 UTC (permalink / raw)
  To: Rob Herring
  Cc: Lee Jones, Jonathan Cameron, linux-iio, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler,
	Mboumba Cedric Madianga,
	open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS

On Thu, Oct 10, 2019 at 8:39 PM Rob Herring <robh@kernel.org> wrote:
> On Wed, Oct 02, 2019 at 12:13:54AM +0200, Linus Walleij wrote:
> > As we migrate the AB8500 GPADC driver to use IIO, we need to augment
> > the bindings to account for defining the ADC channels in the device
> > tree.
> >
> > Cc: devicetree@vger.kernel.org
> > Acked-by: Lee Jones <lee.jones@linaro.org>
> > Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> > ---
> > ChangeLog v2->v3:
> > - Change "adc-channel@" to "channel@" as per preferred notation.
> > - Add some full stops to the end of sentences.
> > - Reference the new ADC-specific documentation for channel specifier
> >   etc.
> > - Collect Lee's ACK.
> > - Rebased on v5.4-rc1
>
> Humm, this is the 2nd v3. Can you address my comments in the 1st v3 you
> sent[1].

Sorry for the sloppiness. I blame it on the weather and some
organizational stress. I'll fix it up and send a proper v4.

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, back to index

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-01 22:13 [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Linus Walleij
2019-10-01 22:13 ` [PATCH 1/7 v3] power: supply: ab8500_btemp: convert to IIO ADC Linus Walleij
2019-10-01 22:13 ` [PATCH 2/7 v3] power: supply: ab8500_charger: " Linus Walleij
2019-10-01 22:13 ` [PATCH 3/7 v3] power: supply: ab8500_fg: " Linus Walleij
2019-10-01 22:13 ` [PATCH 4/7 v3] hwmon: ab8500: " Linus Walleij
2019-10-01 22:13 ` [PATCH 5/7 v3] mfd: ab8500: augment DT bindings Linus Walleij
2019-10-06 10:57   ` Jonathan Cameron
2019-10-10 18:39   ` Rob Herring
2019-10-11  7:07     ` Linus Walleij
2019-10-01 22:13 ` [PATCH 6/7 v3] iio: adc: New driver for the AB8500 GPADC Linus Walleij
2019-10-01 22:13 ` [PATCH 7/7 v3] mfd: Switch the AB8500 GPADC to IIO Linus Walleij
2019-10-06 11:00 ` [PATCH 0/7 v3] AB8500 GPADC MFD to IIO conversion Jonathan Cameron

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