* [PATCH 6/8 v2] iio: adc: New driver for the AB8500 GPADC
2019-08-22 14:52 [PATCH 0/8 v2] AB8500 GPADC MFD to IIO conversion Linus Walleij
` (4 preceding siblings ...)
2019-08-22 14:52 ` [PATCH 5/8 v2] mfd: ab8500: augment DT bindings Linus Walleij
@ 2019-08-22 14:52 ` Linus Walleij
2019-08-26 8:46 ` Jonathan Cameron
2019-08-22 14:52 ` [PATCH 7/8 v2] mfd: Switch the AB8500 GPADC to IIO Linus Walleij
2019-08-22 14:52 ` [PATCH 8/8 v2] ARM: dts: ux500: declare GPADC IIO ADC channels Linus Walleij
7 siblings, 1 reply; 17+ messages in thread
From: Linus Walleij @ 2019-08-22 14:52 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 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.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
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 | 1240 ++++++++++++++++++++++++++++++++
4 files changed, 1252 insertions(+)
create mode 100644 drivers/iio/adc/ab8500-gpadc.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 43604d6ab96c..a2fee2f03530 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1978,6 +1978,7 @@ 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 7e3286265a38..fba7ddcdd8e2 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..e8abaf002c1c
--- /dev/null
+++ b/drivers/iio/adc/ab8500-gpadc.c
@@ -0,0 +1,1240 @@
+// 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 DIS_ZERO 0x00
+#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 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
+ */
+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 = ADC_CH_CHG_V_MIN + (ADC_CH_CHG_V_MAX -
+ ADC_CH_CHG_V_MIN) * ad_value /
+ 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) / 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 = ADC_CH_BTEMP_MIN + (ADC_CH_BTEMP_MAX -
+ ADC_CH_BTEMP_MIN) * ad_value /
+ 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) / 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 = ADC_CH_VBAT_MIN + (ADC_CH_VBAT_MAX -
+ ADC_CH_VBAT_MIN) * ad_value /
+ 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) / CALIB_SCALE;
+ break;
+
+ case AB8505_GPADC_CHAN_DIE_TEMP:
+ res = ADC_CH_DIETEMP_MIN +
+ (ADC_CH_DIETEMP_MAX - ADC_CH_DIETEMP_MIN) * ad_value /
+ ADC_RESOLUTION;
+ break;
+
+ case AB8500_GPADC_CHAN_ACC_DET_2:
+ res = ADC_CH_ACCDET2_MIN +
+ (ADC_CH_ACCDET2_MAX - ADC_CH_ACCDET2_MIN) * ad_value /
+ ADC_RESOLUTION;
+ break;
+
+ case AB8500_GPADC_CHAN_VBUS:
+ res = ADC_CH_CHG_V_MIN +
+ (ADC_CH_CHG_V_MAX - ADC_CH_CHG_V_MIN) * ad_value /
+ ADC_RESOLUTION;
+ break;
+
+ case AB8500_GPADC_CHAN_MAIN_CHARGER_CURRENT:
+ case AB8500_GPADC_CHAN_USB_CHARGER_CURRENT:
+ res = ADC_CH_CHG_I_MIN +
+ (ADC_CH_CHG_I_MAX - ADC_CH_CHG_I_MIN) * ad_value /
+ ADC_RESOLUTION;
+ break;
+
+ case AB8500_GPADC_CHAN_BACKUP_BAT:
+ res = ADC_CH_BKBAT_MIN +
+ (ADC_CH_BKBAT_MAX - ADC_CH_BKBAT_MIN) * ad_value /
+ ADC_RESOLUTION;
+ break;
+
+ case AB8500_GPADC_CHAN_IBAT_VIRTUAL:
+ /* No calibration data available: just interpolate */
+ if (!gpadc->cal_data[AB8500_CAL_IBAT].gain) {
+ res = ADC_CH_IBAT_MIN + (ADC_CH_IBAT_MAX -
+ ADC_CH_IBAT_MIN) * ad_value /
+ 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)
+ >> 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(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 = CALIB_SCALE *
+ (19500 - 315) / (vmain_high - vmain_low);
+ gpadc->cal_data[AB8500_CAL_VMAIN].offset = CALIB_SCALE *
+ 19500 - (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 = ((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[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;
+ }
+
+ dev_dbg(gpadc->dev, "IBAT gain %llu offset %llu\n",
+ gpadc->cal_data[AB8500_CAL_IBAT].gain,
+ gpadc->cal_data[AB8500_CAL_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[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 = CALIB_SCALE *
+ (19500 - 315) / (vmain_high - vmain_low);
+
+ gpadc->cal_data[AB8500_CAL_VMAIN].offset = CALIB_SCALE *
+ 19500 - (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 =
+ CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low);
+ gpadc->cal_data[AB8500_CAL_BTEMP].offset = CALIB_SCALE * 1300 -
+ (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 = CALIB_SCALE *
+ (4700 - 2380) / (vbat_high - vbat_low);
+ gpadc->cal_data[AB8500_CAL_VBAT].offset = CALIB_SCALE * 4700 -
+ (CALIB_SCALE * (4700 - 2380) /
+ (vbat_high - vbat_low)) * vbat_high;
+ } else {
+ gpadc->cal_data[AB8500_CAL_VBAT].gain = 0;
+ }
+
+ dev_dbg(gpadc->dev, "VMAIN gain %llu offset %llu\n",
+ gpadc->cal_data[AB8500_CAL_VMAIN].gain,
+ gpadc->cal_data[AB8500_CAL_VMAIN].offset);
+
+ dev_dbg(gpadc->dev, "BTEMP gain %llu offset %llu\n",
+ gpadc->cal_data[AB8500_CAL_BTEMP].gain,
+ gpadc->cal_data[AB8500_CAL_BTEMP].offset);
+
+ dev_dbg(gpadc->dev, "VBAT gain %llu offset %llu\n",
+ gpadc->cal_data[AB8500_CAL_VBAT].gain,
+ gpadc->cal_data[AB8500_CAL_VBAT].offset);
+}
+
+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;
+ }
+
+ dev_dbg(gpadc->dev, "read channel %d\n", ch->id);
+
+ 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)
+{
+ int ret = 0;
+ 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;
+
+ 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, GPADC_AUDOSUSPEND_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;
+
+ dev_info(dev, "AB8500 GPADC initialized\n");
+
+ 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 related [flat|nested] 17+ messages in thread* [PATCH 7/8 v2] mfd: Switch the AB8500 GPADC to IIO
2019-08-22 14:52 [PATCH 0/8 v2] AB8500 GPADC MFD to IIO conversion Linus Walleij
` (5 preceding siblings ...)
2019-08-22 14:52 ` [PATCH 6/8 v2] iio: adc: New driver for the AB8500 GPADC Linus Walleij
@ 2019-08-22 14:52 ` Linus Walleij
2019-08-22 14:52 ` [PATCH 8/8 v2] ARM: dts: ux500: declare GPADC IIO ADC channels Linus Walleij
7 siblings, 0 replies; 17+ messages in thread
From: Linus Walleij @ 2019-08-22 14:52 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 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 | 799 -----------------
drivers/mfd/ab8500-gpadc.c | 1075 -----------------------
include/linux/mfd/abx500/ab8500-gpadc.h | 75 --
5 files changed, 1957 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 f129f9678940..1bdfb6006297 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1217,13 +1217,6 @@ 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 f026ada68f6a..f7d22d90d944 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -179,7 +179,6 @@ 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 d24c6ecccb88..bd2145afc581 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.
@@ -2645,7 +2011,6 @@ static const struct file_operations ab8500_hwreg_fops = {
};
static struct dentry *ab8500_dir;
-static struct dentry *ab8500_gpadc_dir;
static int ab8500_debug_probe(struct platform_device *plf)
{
@@ -2697,11 +2062,6 @@ static int ab8500_debug_probe(struct platform_device *plf)
if (!ab8500_dir)
goto err;
- ab8500_gpadc_dir = debugfs_create_dir(AB8500_ADC_NAME_STRING,
- ab8500_dir);
- if (!ab8500_gpadc_dir)
- goto err;
-
file = debugfs_create_file("all-bank-registers", S_IRUGO, ab8500_dir,
&plf->dev, &ab8500_bank_registers_fops);
if (!file)
@@ -2772,165 +2132,6 @@ static int ab8500_debug_probe(struct platform_device *plf)
if (!file)
goto err;
- file = debugfs_create_file("bat_ctrl", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_bat_ctrl_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("btemp_ball", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir,
- &plf->dev, &ab8500_gpadc_btemp_ball_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("main_charger_v",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_main_charger_v_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("acc_detect1",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_acc_detect1_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("acc_detect2",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_acc_detect2_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("adc_aux1", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_aux1_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("adc_aux2", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_aux2_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("main_bat_v", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_main_bat_v_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("vbus_v", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_vbus_v_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("main_charger_c",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_main_charger_c_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("usb_charger_c",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir,
- &plf->dev, &ab8500_gpadc_usb_charger_c_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("bk_bat_v", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_bk_bat_v_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("die_temp", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_die_temp_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("usb_id", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_usb_id_fops);
- if (!file)
- goto err;
-
- if (is_ab8540(ab8500)) {
- file = debugfs_create_file("xtal_temp",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8540_gpadc_xtal_temp_fops);
- if (!file)
- goto err;
- file = debugfs_create_file("vbattruemeas",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8540_gpadc_vbat_true_meas_fops);
- if (!file)
- goto err;
- file = debugfs_create_file("batctrl_and_ibat",
- (S_IRUGO | S_IWUGO),
- ab8500_gpadc_dir,
- &plf->dev,
- &ab8540_gpadc_bat_ctrl_and_ibat_fops);
- if (!file)
- goto err;
- file = debugfs_create_file("vbatmeas_and_ibat",
- (S_IRUGO | S_IWUGO),
- ab8500_gpadc_dir, &plf->dev,
- &ab8540_gpadc_vbat_meas_and_ibat_fops);
- if (!file)
- goto err;
- file = debugfs_create_file("vbattruemeas_and_ibat",
- (S_IRUGO | S_IWUGO),
- ab8500_gpadc_dir,
- &plf->dev,
- &ab8540_gpadc_vbat_true_meas_and_ibat_fops);
- if (!file)
- goto err;
- file = debugfs_create_file("battemp_and_ibat",
- (S_IRUGO | S_IWUGO),
- ab8500_gpadc_dir,
- &plf->dev, &ab8540_gpadc_bat_temp_and_ibat_fops);
- if (!file)
- goto err;
- file = debugfs_create_file("otp_calib",
- (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir,
- &plf->dev, &ab8540_gpadc_otp_calib_fops);
- if (!file)
- goto err;
- }
- file = debugfs_create_file("avg_sample", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_avg_sample_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("trig_edge", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_trig_edge_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("trig_timer", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_trig_timer_fops);
- if (!file)
- goto err;
-
- file = debugfs_create_file("conv_type", (S_IRUGO | S_IWUSR | S_IWGRP),
- ab8500_gpadc_dir, &plf->dev,
- &ab8500_gpadc_conv_type_fops);
- if (!file)
- goto err;
-
return 0;
err:
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
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