[PATCH v5 0/4] mfd: add tps6594 support for Jacinto platforms

[PATCH v5 0/4] mfd: add tps6594 support for Jacinto platforms

[Matt Ranostay]

This patchset series adds support for the TPS6594 PMIC along with
initial support for its RTC + GPIO interface, and poweroff sequence.

Changes from v1:
* Corrected devicetree documentation issues found with dt-schema
* Changed MFD references to PMIC reflecting the more valid use of driver
* Cleaning up variable naming and ordering within functions
* Adding gpio + regulator cells for upcoming driver support
* Switching from .probe to .probe_new API
* Revising comments within drivers to be more concise
* Adding device tree nodes for j721s2 and j721e platforms

Changes from v2:
* Adding gpio-tps6594x driver support
* Enabling gpio cell in MFD driver

Changes from v3:
* Refactoring gpio driver to use regmap gpio helpers
* Changing rtc driver to use more of device resource management
* Minor code changes related to error messages that aren't useful
  being dropped
* Dropped wildcard in device-tree compatible, and i2c device id
* Dropped device tree changes from the series; since these should
  be in their own series later

Changes from v4:
* Corrected commit messages for device tree documentation
* Added TPS6954 datasheet PDF to devicetree documentation
* Renamed all references, including filenames + configuration options,
  from tps6594x to tps6594 dropping the unneeded wildcard

Keerthy (2):
  mfd: tps6594: Add support for TPS6594 PMIC devices
  rtc: rtc-tps6594: Add support for TPS6594 PMIC RTC

Matt Ranostay (2):
  dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support
  gpio: gpio-tps6594: add GPIO support for TPS6594 PMIC

 .../devicetree/bindings/mfd/ti,tps6594.yaml   |  69 ++++++++
 drivers/gpio/Kconfig                          |   9 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-tps6594.c                   |  78 +++++++++
 drivers/mfd/Kconfig                           |  14 ++
 drivers/mfd/Makefile                          |   1 +
 drivers/mfd/tps6594.c                         | 113 +++++++++++++
 drivers/rtc/Kconfig                           |  10 ++
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-tps6594.c                     | 155 ++++++++++++++++++
 include/linux/mfd/tps6594.h                   |  88 ++++++++++
 11 files changed, 539 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
 create mode 100644 drivers/gpio/gpio-tps6594.c
 create mode 100644 drivers/mfd/tps6594.c
 create mode 100644 drivers/rtc/rtc-tps6594.c
 create mode 100644 include/linux/mfd/tps6594.h

-- 
2.38.GIT


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[PATCH v5 1/4] dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support

[Matt Ranostay]

Add documentation for the TPS6594 PMIC including its RTC and GPIO
functionalities.

Signed-off-by: Matt Ranostay <mranostay@ti.com>
---
 .../devicetree/bindings/mfd/ti,tps6594.yaml   | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml

diff --git a/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
new file mode 100644
index 000000000000..0de0db87dbf7
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,tps6594.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TPS6594 Power Management Integrated Circuit (PMIC)
+
+description: |
+  TPS6594 Power Management Integrated Circuit (PMIC)
+  https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf
+
+maintainers:
+  - Keerthy <j-keerthy@ti.com>
+
+properties:
+  compatible:
+    enum:
+      - ti,tps6594
+
+  reg:
+    const: 0x48
+
+  ti,system-power-controller:
+    type: boolean
+    description: PMIC is controlling the system power.
+
+  rtc:
+    type: object
+    $ref: /schemas/rtc/rtc.yaml#
+    unevaluatedProperties: false
+    properties:
+      compatible:
+        const: ti,tps6594-rtc
+
+  gpio:
+    type: object
+    unevaluatedProperties: false
+    properties:
+      compatible:
+        const: ti,tps6594-gpio
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic: pmic@48 {
+            compatible = "ti,tps6594";
+            reg = <0x48>;
+
+            rtc {
+                compatible = "ti,tps6594-rtc";
+            };
+
+            gpio {
+                compatible = "ti,tps6594-gpio";
+            };
+        };
+    };
+
+...
-- 
2.38.GIT


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[PATCH v5 2/4] mfd: tps6594: Add support for TPS6594 PMIC devices

[Matt Ranostay]

From: Keerthy <j-keerthy@ti.com>

The TPS6594 chip is a PMIC, and contains the following components:

- GPIO controller
- RTC

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Matt Ranostay <mranostay@ti.com>
---
 drivers/mfd/Kconfig         |  14 +++++
 drivers/mfd/Makefile        |   1 +
 drivers/mfd/tps6594.c       | 113 ++++++++++++++++++++++++++++++++++++
 include/linux/mfd/tps6594.h |  84 +++++++++++++++++++++++++++
 4 files changed, 212 insertions(+)
 create mode 100644 drivers/mfd/tps6594.c
 create mode 100644 include/linux/mfd/tps6594.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 6653d03e0fe3..c54f2959a200 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1596,6 +1596,20 @@ config MFD_TI_LP873X
 	  This driver can also be built as a module. If so, the module
 	  will be called lp873x.
 
+config MFD_TPS6594
+	tristate "TI TPS6594 Power Management IC"
+	depends on I2C && OF
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  If you say yes here then you get support for the TPS6594 series of
+	  Power Management Integrated Circuits (PMIC).
+	  These include voltage regulators, RTS, configurable
+	  General Purpose Outputs (GPO) that are used in portable devices.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called tps6594.
+
 config MFD_TI_LP87565
 	tristate "TI LP87565 Power Management IC"
 	depends on I2C && OF
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 4dd479212b3a..b4fdfcc57831 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_MFD_TPS65910)	+= tps65910.o
 obj-$(CONFIG_MFD_TPS65912)	+= tps65912-core.o
 obj-$(CONFIG_MFD_TPS65912_I2C)	+= tps65912-i2c.o
 obj-$(CONFIG_MFD_TPS65912_SPI)  += tps65912-spi.o
+obj-$(CONFIG_MFD_TPS6594)	+= tps6594.o
 obj-$(CONFIG_MENELAUS)		+= menelaus.o
 
 obj-$(CONFIG_TWL4030_CORE)	+= twl-core.o twl4030-irq.o twl6030-irq.o
diff --git a/drivers/mfd/tps6594.c b/drivers/mfd/tps6594.c
new file mode 100644
index 000000000000..a7f80833e8fc
--- /dev/null
+++ b/drivers/mfd/tps6594.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for TPS6594 PMIC chips
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Author: Keerthy <j-keerthy@ti.com>
+ */
+
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps6594.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+
+static const struct regmap_config tps6594_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = TPS6594_REG_MAX,
+};
+
+static const struct mfd_cell tps6594_cells[] = {
+	{ .name = "tps6594-gpio" },
+	{ .name = "tps6594-rtc" },
+};
+
+static struct tps6594 *tps;
+
+static void tps6594_power_off(void)
+{
+	regmap_write(tps->regmap, TPS6594_FSM_NSLEEP_TRIGGERS,
+		TPS6594_FSM_NSLEEP_NSLEEP1B | TPS6594_FSM_NSLEEP_NSLEEP2B);
+
+	regmap_write(tps->regmap, TPS6594_INT_STARTUP,
+		TPS6594_INT_STARTUP_NPWRON_START_INT |
+		TPS6594_INT_STARTUP_ENABLE_INT | TPS6594_INT_STARTUP_RTC_INT |
+		TPS6594_INT_STARTUP_SOFT_REBOOT_INT);
+
+	regmap_write(tps->regmap, TPS6594_INT_MISC,
+		TPS6594_INT_MISC_BIST_PASS_INT |
+		TPS6594_INT_MISC_EXT_CLK_INT | TPS6594_INT_MISC_TWARN_INT);
+
+	regmap_write(tps->regmap, TPS6594_CONFIG_1,
+		TPS6594_CONFIG_NSLEEP1_MASK | TPS6594_CONFIG_NSLEEP2_MASK);
+
+	regmap_write(tps->regmap, TPS6594_FSM_I2C_TRIGGERS,
+		TPS6594_FSM_I2C_TRIGGERS_I2C0);
+}
+
+static int tps6594_probe(struct i2c_client *client)
+{
+	struct tps6594 *ddata;
+	struct device_node *node = client->dev.of_node;
+	unsigned int otpid;
+	int ret;
+
+	ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
+	if (!ddata)
+		return -ENOMEM;
+
+	ddata->dev = &client->dev;
+
+	ddata->regmap = devm_regmap_init_i2c(client, &tps6594_regmap_config);
+	if (IS_ERR(ddata->regmap))
+		return dev_err_probe(ddata->dev, PTR_ERR(ddata->regmap),
+			"Failed to initialize register map\n");
+
+	ret = regmap_read(ddata->regmap, TPS6594_REG_DEV_REV, &otpid);
+	if (ret)
+		return dev_err_probe(ddata->dev, ret, "Failed to read OTP ID\n");
+
+	ddata->rev = otpid;
+	i2c_set_clientdata(client, ddata);
+
+	ret = mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, tps6594_cells,
+			      ARRAY_SIZE(tps6594_cells), NULL, 0, NULL);
+	if (ret)
+		return dev_err_probe(ddata->dev, ret, "Failed to register cells\n");
+
+	tps = ddata;
+
+	if (of_property_read_bool(node, "ti,system-power-controller"))
+		pm_power_off = tps6594_power_off;
+
+	return 0;
+}
+
+static const struct of_device_id of_tps6594_match_table[] = {
+	{ .compatible = "ti,tps6594", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, of_tps6594_match_table);
+
+static const struct i2c_device_id tps6594_id_table[] = {
+	{ "tps6594", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, tps6594_id_table);
+
+static struct i2c_driver tps6594_driver = {
+	.driver	= {
+		.name	= "tps6594",
+		.of_match_table = of_tps6594_match_table,
+	},
+	.probe_new	= tps6594_probe,
+	.id_table	= tps6594_id_table,
+};
+module_i2c_driver(tps6594_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("TPS6594 PMIC device driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/tps6594.h b/include/linux/mfd/tps6594.h
new file mode 100644
index 000000000000..f721ec9880dd
--- /dev/null
+++ b/include/linux/mfd/tps6594.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Core driver interface for TI TPS6594 PMIC family
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#ifndef __MFD_TPS6594_H
+#define __MFD_TPS6594_H
+
+#include <linux/bits.h>
+
+/* TPS6594 chip ID list */
+#define TPS6594			0x00
+
+/* All register addresses */
+#define TPS6594_REG_DEV_REV			0x01
+#define TPS6594_INT_STARTUP			0x65
+#define TPS6594_INT_MISC			0x66
+#define TPS6594_CONFIG_1			0x7d
+#define TPS6594_FSM_I2C_TRIGGERS		0x85
+#define TPS6594_FSM_NSLEEP_TRIGGERS		0x86
+
+#define TPS6594_RTC_SECONDS			0xb5
+#define TPS6594_RTC_MINUTES			0xb6
+#define TPS6594_RTC_HOURS			0xb7
+#define TPS6594_RTC_DAYS			0xb8
+#define TPS6594_RTC_MONTHS			0xb9
+#define TPS6594_RTC_YEARS			0xba
+#define TPS6594_RTC_WEEKS			0xbb
+#define TPS6594_ALARM_SECONDS			0xbc
+#define TPS6594_ALARM_MINUTES			0xbd
+#define TPS6594_ALARM_HOURS			0xbe
+#define TPS6594_ALARM_DAYS			0xbf
+#define TPS6594_ALARM_MONTHS			0xc0
+#define TPS6594_ALARM_YEARS			0xc1
+#define TPS6594_RTC_CTRL_1			0xc2
+#define TPS6594_RTC_CTRL_2			0xc3
+#define TPS6594_RTC_STATUS			0xc4
+#define TPS6594_RTC_INTERRUPTS			0xc5
+#define TPS6594_REG_MAX			0xd0
+
+/* Register field definitions */
+#define TPS6594_DEV_REV_DEV_ID			0xff
+
+#define TPS6594_INT_STARTUP_NPWRON_START_INT	BIT(0)
+#define TPS6594_INT_STARTUP_ENABLE_INT		BIT(1)
+#define TPS6594_INT_STARTUP_RTC_INT		BIT(2)
+#define TPS6594_INT_STARTUP_FSD_INT		BIT(4)
+#define TPS6594_INT_STARTUP_SOFT_REBOOT_INT	BIT(5)
+
+#define TPS6594_INT_MISC_BIST_PASS_INT		BIT(0)
+#define TPS6594_INT_MISC_EXT_CLK_INT		BIT(1)
+#define TPS6594_INT_MISC_TWARN_INT		BIT(3)
+
+#define TPS6594_CONFIG_NSLEEP1_MASK		BIT(6)
+#define TPS6594_CONFIG_NSLEEP2_MASK		BIT(7)
+
+#define TPS6594_FSM_I2C_TRIGGERS_I2C0		BIT(0)
+
+#define TPS6594_FSM_NSLEEP_NSLEEP1B		BIT(0)
+#define TPS6594_FSM_NSLEEP_NSLEEP2B		BIT(1)
+
+#define TPS6594_RTC_CTRL_REG_GET_TIME		BIT(6)
+#define TPS6594_RTC_CTRL_REG_STOP_RTC		BIT(0)
+#define TPS6594_RTC_INTERRUPTS_REG_IT_ALARM	BIT(3)
+
+#define TPS6594_RTC_STATUS_RUN			BIT(1)
+
+/**
+ * struct tps6594 - state holder for the tps6594 driver
+ * @dev: struct device pointer for MFD device
+ * @rev: revision of the tps6594
+ * @lock: lock guarding the data structure
+ * @regmap: register map of the tps6594 PMIC
+ *
+ * Device data may be used to access the TPS6594 chip
+ */
+struct tps6594 {
+	struct device *dev;
+	u8 rev;
+	struct regmap *regmap;
+};
+#endif /* __MFD_TPS6594_H */
-- 
2.38.GIT


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[PATCH v5 3/4] rtc: rtc-tps6594: Add support for TPS6594 PMIC RTC

[Matt Ranostay]

From: Keerthy <j-keerthy@ti.com>

Add support for TPS6594 PMIC RTC. However, currently only get/set of
time + date functionality is supported.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Matt Ranostay <mranostay@ti.com>
---
 drivers/rtc/Kconfig       |  10 +++
 drivers/rtc/Makefile      |   1 +
 drivers/rtc/rtc-tps6594.c | 155 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 166 insertions(+)
 create mode 100644 drivers/rtc/rtc-tps6594.c

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index ab9a1f814119..519dc544b083 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -588,6 +588,16 @@ config RTC_DRV_TPS65910
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-tps65910.
 
+config RTC_DRV_TPS6594
+	tristate "TI TPS6594 RTC driver"
+	depends on MFD_TPS6594 || COMPILE_TEST
+	help
+	  If you say yes here you get support for the RTC of TI TPS6594 series PMIC
+	  chips.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-tps6594.
+
 config RTC_DRV_RC5T583
 	tristate "RICOH 5T583 RTC driver"
 	depends on MFD_RC5T583
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index d3c042dcbc73..4493a13f989d 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -175,6 +175,7 @@ obj-$(CONFIG_RTC_DRV_TEST)	+= rtc-test.o
 obj-$(CONFIG_RTC_DRV_TI_K3)	+= rtc-ti-k3.o
 obj-$(CONFIG_RTC_DRV_TPS6586X)	+= rtc-tps6586x.o
 obj-$(CONFIG_RTC_DRV_TPS65910)	+= rtc-tps65910.o
+obj-$(CONFIG_RTC_DRV_TPS6594)	+= rtc-tps6594.o
 obj-$(CONFIG_RTC_DRV_TWL4030)	+= rtc-twl.o
 obj-$(CONFIG_RTC_DRV_V3020)	+= rtc-v3020.o
 obj-$(CONFIG_RTC_DRV_VT8500)	+= rtc-vt8500.o
diff --git a/drivers/rtc/rtc-tps6594.c b/drivers/rtc/rtc-tps6594.c
new file mode 100644
index 000000000000..6e85ea8551a2
--- /dev/null
+++ b/drivers/rtc/rtc-tps6594.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * rtc-tps6594.c -- TPS6594 Real Time Clock driver.
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com
+ */
+
+#include <linux/bcd.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/tps6594.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/rtc.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+struct tps6594_rtc {
+	struct rtc_device	*rtc;
+	struct device		*dev;
+};
+
+#define TPS6594_RTC_POLL	20000
+#define TPS6594_RTC_TIMEOUT	100000
+
+#define TPS6594_NUM_TIME_REGS	(TPS6594_RTC_YEARS - TPS6594_RTC_SECONDS + 1)
+
+static int tps6594_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	unsigned char rtc_data[TPS6594_NUM_TIME_REGS];
+	struct tps6594 *tps6594 = dev_get_drvdata(dev->parent);
+	int ret;
+
+	/* Reset TPS6594_RTC_CTRL_REG_GET_TIME bit to zero, required for latch */
+	ret = regmap_update_bits(tps6594->regmap, TPS6594_RTC_CTRL_1,
+		TPS6594_RTC_CTRL_REG_GET_TIME, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Copy RTC counting registers to static registers or latches */
+	ret = regmap_update_bits(tps6594->regmap, TPS6594_RTC_CTRL_1,
+		TPS6594_RTC_CTRL_REG_GET_TIME, TPS6594_RTC_CTRL_REG_GET_TIME);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_bulk_read(tps6594->regmap, TPS6594_RTC_SECONDS,
+			rtc_data, TPS6594_NUM_TIME_REGS);
+	if (ret < 0)
+		return ret;
+
+	tm->tm_sec = bcd2bin(rtc_data[0]);
+	tm->tm_min = bcd2bin(rtc_data[1]);
+	tm->tm_hour = bcd2bin(rtc_data[2]);
+	tm->tm_mday = bcd2bin(rtc_data[3]);
+	tm->tm_mon = bcd2bin(rtc_data[4]) - 1;
+	tm->tm_year = bcd2bin(rtc_data[5]) + 100;
+
+	return ret;
+}
+
+static int tps6594_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	unsigned char rtc_data[TPS6594_NUM_TIME_REGS];
+	struct tps6594 *tps6594 = dev_get_drvdata(dev->parent);
+	unsigned int val;
+	int ret;
+
+	rtc_data[0] = bin2bcd(tm->tm_sec);
+	rtc_data[1] = bin2bcd(tm->tm_min);
+	rtc_data[2] = bin2bcd(tm->tm_hour);
+	rtc_data[3] = bin2bcd(tm->tm_mday);
+	rtc_data[4] = bin2bcd(tm->tm_mon + 1);
+	rtc_data[5] = bin2bcd(tm->tm_year - 100);
+
+	/* Stop RTC while updating the RTC time registers */
+	ret = regmap_update_bits(tps6594->regmap, TPS6594_RTC_CTRL_1,
+				 TPS6594_RTC_CTRL_REG_STOP_RTC, 0);
+	if (ret < 0) {
+		dev_err(dev, "RTC stop failed, err = %d\n", ret);
+		return ret;
+	}
+
+	/* Waiting till RTC isn't running */
+	ret = regmap_read_poll_timeout(tps6594->regmap, TPS6594_RTC_STATUS,
+				       val, !(val & TPS6594_RTC_STATUS_RUN),
+				       TPS6594_RTC_POLL, TPS6594_RTC_TIMEOUT);
+	if (ret) {
+		dev_err(dev, "RTC_STATUS is still RUNNING\n");
+		return ret;
+	}
+
+	ret = regmap_bulk_write(tps6594->regmap, TPS6594_RTC_SECONDS,
+		rtc_data, TPS6594_NUM_TIME_REGS);
+	if (ret < 0) {
+		dev_err(dev, "RTC_SECONDS reg write failed, err = %d\n", ret);
+		return ret;
+	}
+
+	/* Start back RTC */
+	ret = regmap_update_bits(tps6594->regmap, TPS6594_RTC_CTRL_1,
+				 TPS6594_RTC_CTRL_REG_STOP_RTC,
+				 TPS6594_RTC_CTRL_REG_STOP_RTC);
+	if (ret < 0)
+		dev_err(dev, "RTC start failed, err = %d\n", ret);
+
+	return ret;
+}
+
+static const struct rtc_class_ops tps6594_rtc_ops = {
+	.read_time	= tps6594_rtc_read_time,
+	.set_time	= tps6594_rtc_set_time,
+};
+
+static int tps6594_rtc_probe(struct platform_device *pdev)
+{
+	struct tps6594_rtc *tps6594_rtc;
+
+	tps6594_rtc = devm_kzalloc(&pdev->dev, sizeof(*tps6594_rtc), GFP_KERNEL);
+	if (!tps6594_rtc)
+		return -ENOMEM;
+
+	tps6594_rtc->dev = &pdev->dev;
+	platform_set_drvdata(pdev, tps6594_rtc);
+
+	tps6594_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
+	if (IS_ERR(tps6594_rtc->rtc))
+		return PTR_ERR(tps6594_rtc->rtc);
+
+	tps6594_rtc->rtc->ops = &tps6594_rtc_ops;
+
+	return devm_rtc_register_device(tps6594_rtc->rtc);
+}
+
+static const struct of_device_id of_tps6594_rtc_match[] = {
+	{ .compatible = "ti,tps6594-rtc", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_tps6594_rtc_match);
+
+static struct platform_driver tps6594_rtc_driver = {
+	.probe		= tps6594_rtc_probe,
+	.driver		= {
+		.name	= "tps6594-rtc",
+		.of_match_table = of_tps6594_rtc_match,
+	},
+};
+
+module_platform_driver(tps6594_rtc_driver);
+
+MODULE_ALIAS("platform:tps6594-rtc");
+MODULE_DESCRIPTION("TI TPS6594 series RTC driver");
+MODULE_AUTHOR("Keerthy J <j-keerthy@ti.com>");
+MODULE_LICENSE("GPL");
-- 
2.38.GIT


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[PATCH v5 4/4] gpio: gpio-tps6594: add GPIO support for TPS6594 PMIC

[Matt Ranostay]

Add support for TPS6594 PMICs GPIO interface that has 11 that can be
configured as input or outputs.

Signed-off-by: Matt Ranostay <mranostay@ti.com>
---
 drivers/gpio/Kconfig        |  9 +++++
 drivers/gpio/Makefile       |  1 +
 drivers/gpio/gpio-tps6594.c | 78 +++++++++++++++++++++++++++++++++++++
 include/linux/mfd/tps6594.h |  4 ++
 4 files changed, 92 insertions(+)
 create mode 100644 drivers/gpio/gpio-tps6594.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ec7cfd4f52b1..f34b3746075a 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1405,6 +1405,15 @@ config GPIO_TPS65912
 	help
 	  This driver supports TPS65912 GPIO chip.
 
+config GPIO_TPS6594
+	tristate "TI TPS6594 GPIO driver"
+	depends on MFD_TPS6594 || COMPILE_TEST
+	select REGMAP
+	select GPIO_REGMAP
+	help
+	  Select this option to enable GPIO driver for the TPS6954
+	  PMIC chip family. There are 11 GPIOs that can be configured.
+
 config GPIO_TPS68470
 	tristate "TPS68470 GPIO"
 	depends on INTEL_SKL_INT3472
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 010587025fc8..31bef1cc112f 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -159,6 +159,7 @@ obj-$(CONFIG_GPIO_TPS65218)		+= gpio-tps65218.o
 obj-$(CONFIG_GPIO_TPS6586X)		+= gpio-tps6586x.o
 obj-$(CONFIG_GPIO_TPS65910)		+= gpio-tps65910.o
 obj-$(CONFIG_GPIO_TPS65912)		+= gpio-tps65912.o
+obj-$(CONFIG_GPIO_TPS6594)		+= gpio-tps6594.o
 obj-$(CONFIG_GPIO_TPS68470)		+= gpio-tps68470.o
 obj-$(CONFIG_GPIO_TQMX86)		+= gpio-tqmx86.o
 obj-$(CONFIG_GPIO_TS4800)		+= gpio-ts4800.o
diff --git a/drivers/gpio/gpio-tps6594.c b/drivers/gpio/gpio-tps6594.c
new file mode 100644
index 000000000000..983c37a77266
--- /dev/null
+++ b/drivers/gpio/gpio-tps6594.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * GPIO driver for TI TPS6594 PMICs
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/gpio/regmap.h>
+#include <linux/gpio/driver.h>
+#include <linux/mfd/tps6594.h>
+
+#define GPIO_BANK_SIZE	8
+#define GPIO_CFG_MASK	BIT(0)
+
+static int tps6594_regmap_xlate(struct gpio_regmap *gpio,
+				    unsigned int base, unsigned int offset,
+				    unsigned int *reg, unsigned int *mask)
+{
+	if (base == TPS6594_GPIO_CONF) {
+		*reg = base + offset;
+		*mask = GPIO_CFG_MASK;
+	} else {
+		unsigned int line = offset % GPIO_BANK_SIZE;
+		unsigned int stride = offset / GPIO_BANK_SIZE;
+
+		*reg = base + stride;
+		*mask = BIT(line);
+	}
+
+	return 0;
+}
+
+static int tps6594_gpio_probe(struct platform_device *pdev)
+{
+	struct gpio_regmap_config config = {0};
+	struct regmap *regmap;
+
+	regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!regmap)
+		return -ENODEV;
+
+	config.regmap = regmap;
+	config.parent = &pdev->dev;
+	config.ngpio = 11;
+	config.ngpio_per_reg = GPIO_BANK_SIZE;
+
+	config.reg_dat_base = TPS6594_GPIO_IN;
+	config.reg_set_base = TPS6594_GPIO_OUT;
+	config.reg_dir_out_base = TPS6594_GPIO_CONF;
+	config.reg_mask_xlate = tps6594_regmap_xlate;
+
+	return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));
+}
+
+static const struct of_device_id of_tps6594_gpio_match[] = {
+	{ .compatible = "ti,tps6594-gpio", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_tps6594_gpio_match);
+
+static struct platform_driver tps6594_gpio_driver = {
+	.driver = {
+		.name = "tps6594-gpio",
+		.of_match_table = of_tps6594_gpio_match,
+	},
+	.probe = tps6594_gpio_probe,
+};
+module_platform_driver(tps6594_gpio_driver);
+
+MODULE_ALIAS("platform:tps6594-gpio");
+MODULE_AUTHOR("Matt Ranostay <mranostay@ti.com>");
+MODULE_DESCRIPTION("TPS6594 GPIO driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/tps6594.h b/include/linux/mfd/tps6594.h
index f721ec9880dd..758b1bc44178 100644
--- a/include/linux/mfd/tps6594.h
+++ b/include/linux/mfd/tps6594.h
@@ -21,6 +21,10 @@
 #define TPS6594_FSM_I2C_TRIGGERS		0x85
 #define TPS6594_FSM_NSLEEP_TRIGGERS		0x86
 
+#define TPS6594_GPIO_CONF			0x31
+#define TPS6594_GPIO_OUT			0x3d
+#define TPS6594_GPIO_IN			0x3f
+
 #define TPS6594_RTC_SECONDS			0xb5
 #define TPS6594_RTC_MINUTES			0xb6
 #define TPS6594_RTC_HOURS			0xb7
-- 
2.38.GIT


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Re: [PATCH v5 1/4] dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support

[Tony Lindgren]

* Matt Ranostay <mranostay@ti.com> [221123 05:35]:
> Add documentation for the TPS6594 PMIC including its RTC and GPIO
> functionalities.

Reviewed-by: Tony Lindgren <tony@atomide.com>

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Re: [PATCH v5 2/4] mfd: tps6594: Add support for TPS6594 PMIC devices

[Tony Lindgren]

* Matt Ranostay <mranostay@ti.com> [221123 05:36]:
> From: Keerthy <j-keerthy@ti.com>
> 
> The TPS6594 chip is a PMIC, and contains the following components:
> 
> - GPIO controller
> - RTC

Looks nice to me:

Reviewed-by: Tony Lindgren <tony@atomide.com>

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Re: [PATCH v5 3/4] rtc: rtc-tps6594: Add support for TPS6594 PMIC RTC

[Tony Lindgren]

* Matt Ranostay <mranostay@ti.com> [221123 05:33]:
> From: Keerthy <j-keerthy@ti.com>
> 
> Add support for TPS6594 PMIC RTC. However, currently only get/set of
> time + date functionality is supported.

Reviewed-by: Tony Lindgren <tony@atomide.com>

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Re: [PATCH v5 4/4] gpio: gpio-tps6594: add GPIO support for TPS6594 PMIC

[Tony Lindgren]

* Matt Ranostay <mranostay@ti.com> [221123 05:35]:
> Add support for TPS6594 PMICs GPIO interface that has 11 that can be
> configured as input or outputs.

Reviewed-by: Tony Lindgren <tony@atomide.com>

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Re: [PATCH v5 4/4] gpio: gpio-tps6594: add GPIO support for TPS6594 PMIC

[Michael Walle]

Am 2022-11-23 06:35, schrieb Matt Ranostay:

> +static int tps6594_regmap_xlate(struct gpio_regmap *gpio,
> +				    unsigned int base, unsigned int offset,
> +				    unsigned int *reg, unsigned int *mask)
> +{
> +	if (base == TPS6594_GPIO_CONF) {
> +		*reg = base + offset;
> +		*mask = GPIO_CFG_MASK;
> +	} else {
> +		unsigned int line = offset % GPIO_BANK_SIZE;
> +		unsigned int stride = offset / GPIO_BANK_SIZE;
> +
> +		*reg = base + stride;
> +		*mask = BIT(line);
> +	}

This looks like a duplcate from gpio_regmap_simple_xlate(). Maybe
we can export it and do

if (base == TPS6594_GPIO_CONF) {
	*reg = base + offset;
	*mask = GPIO_CFG_MASK;
} else {
	return gpio_regmap_simple_xlate(gpio, base, offset, reg, mask);
}

Apart from that
Reviewed-by: Michael Walle <michael@walle.cc>

-michael

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Re: [PATCH v5 1/4] dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support

[Krzysztof Kozlowski]

On 23/11/2022 06:35, Matt Ranostay wrote:
> Add documentation for the TPS6594 PMIC including its RTC and GPIO
> functionalities.

Back in September I asked to use get_maintainers.pl to CC people. Can
you please tell me, why you still prefer not to use it's output and
instead use a bit different email addresses?

How many times same feedback should be given?

> 
> Signed-off-by: Matt Ranostay <mranostay@ti.com>
> ---
>  .../devicetree/bindings/mfd/ti,tps6594.yaml   | 69 +++++++++++++++++++
>  1 file changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> new file mode 100644
> index 000000000000..0de0db87dbf7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ti,tps6594.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TPS6594 Power Management Integrated Circuit (PMIC)
> +
> +description: |
> +  TPS6594 Power Management Integrated Circuit (PMIC)
> +  https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf
> +
> +maintainers:
> +  - Keerthy <j-keerthy@ti.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,tps6594
> +
> +  reg:
> +    const: 0x48
> +
> +  ti,system-power-controller:
> +    type: boolean
> +    description: PMIC is controlling the system power.
> +
> +  rtc:
> +    type: object
> +    $ref: /schemas/rtc/rtc.yaml#
> +    unevaluatedProperties: false
> +    properties:
> +      compatible:
> +        const: ti,tps6594-rtc
> +
> +  gpio:
> +    type: object
> +    unevaluatedProperties: false
> +    properties:
> +      compatible:
> +        const: ti,tps6594-gpio
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    i2c0 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        pmic: pmic@48 {
> +            compatible = "ti,tps6594";
> +            reg = <0x48>;
> +
> +            rtc {
> +                compatible = "ti,tps6594-rtc";

No resources? No properties? Usually such nodes are not useful at all.
Rob pointed this some times in different cases, but I don't remember if
we resolved it here.

> +            };
> +
> +            gpio {
> +                compatible = "ti,tps6594-gpio";

Same question.

> +            };
> +        };
> +    };
> +
> +...

Best regards,
Krzysztof


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Re: [PATCH v5 0/4] mfd: add tps6594 support for Jacinto platforms

[J, KEERTHY]

On 11/23/2022 11:05 AM, Matt Ranostay wrote:
> This patchset series adds support for the TPS6594 PMIC along with
> initial support for its RTC + GPIO interface, and poweroff sequence.

For the series:

Reviewed-by: Keerthy <j-keerthy@ti.com>

- Keerthy
> 
> Changes from v1:
> * Corrected devicetree documentation issues found with dt-schema
> * Changed MFD references to PMIC reflecting the more valid use of driver
> * Cleaning up variable naming and ordering within functions
> * Adding gpio + regulator cells for upcoming driver support
> * Switching from .probe to .probe_new API
> * Revising comments within drivers to be more concise
> * Adding device tree nodes for j721s2 and j721e platforms
> 
> Changes from v2:
> * Adding gpio-tps6594x driver support
> * Enabling gpio cell in MFD driver
> 
> Changes from v3:
> * Refactoring gpio driver to use regmap gpio helpers
> * Changing rtc driver to use more of device resource management
> * Minor code changes related to error messages that aren't useful
>    being dropped
> * Dropped wildcard in device-tree compatible, and i2c device id
> * Dropped device tree changes from the series; since these should
>    be in their own series later
> 
> Changes from v4:
> * Corrected commit messages for device tree documentation
> * Added TPS6954 datasheet PDF to devicetree documentation
> * Renamed all references, including filenames + configuration options,
>    from tps6594x to tps6594 dropping the unneeded wildcard
> 
> Keerthy (2):
>    mfd: tps6594: Add support for TPS6594 PMIC devices
>    rtc: rtc-tps6594: Add support for TPS6594 PMIC RTC
> 
> Matt Ranostay (2):
>    dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support
>    gpio: gpio-tps6594: add GPIO support for TPS6594 PMIC
> 
>   .../devicetree/bindings/mfd/ti,tps6594.yaml   |  69 ++++++++
>   drivers/gpio/Kconfig                          |   9 +
>   drivers/gpio/Makefile                         |   1 +
>   drivers/gpio/gpio-tps6594.c                   |  78 +++++++++
>   drivers/mfd/Kconfig                           |  14 ++
>   drivers/mfd/Makefile                          |   1 +
>   drivers/mfd/tps6594.c                         | 113 +++++++++++++
>   drivers/rtc/Kconfig                           |  10 ++
>   drivers/rtc/Makefile                          |   1 +
>   drivers/rtc/rtc-tps6594.c                     | 155 ++++++++++++++++++
>   include/linux/mfd/tps6594.h                   |  88 ++++++++++
>   11 files changed, 539 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
>   create mode 100644 drivers/gpio/gpio-tps6594.c
>   create mode 100644 drivers/mfd/tps6594.c
>   create mode 100644 drivers/rtc/rtc-tps6594.c
>   create mode 100644 include/linux/mfd/tps6594.h
> 

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Re: [PATCH v5 1/4] dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support

[Rob Herring]

On Tue, Nov 22, 2022 at 09:35:09PM -0800, Matt Ranostay wrote:
> Add documentation for the TPS6594 PMIC including its RTC and GPIO
> functionalities.
> 
> Signed-off-by: Matt Ranostay <mranostay@ti.com>
> ---
>  .../devicetree/bindings/mfd/ti,tps6594.yaml   | 69 +++++++++++++++++++
>  1 file changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> new file mode 100644
> index 000000000000..0de0db87dbf7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ti,tps6594.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TPS6594 Power Management Integrated Circuit (PMIC)
> +
> +description: |
> +  TPS6594 Power Management Integrated Circuit (PMIC)
> +  https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf

Normally a PMIC has some regulators...

> +
> +maintainers:
> +  - Keerthy <j-keerthy@ti.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,tps6594
> +
> +  reg:
> +    const: 0x48
> +
> +  ti,system-power-controller:
> +    type: boolean
> +    description: PMIC is controlling the system power.
> +
> +  rtc:
> +    type: object
> +    $ref: /schemas/rtc/rtc.yaml#
> +    unevaluatedProperties: false
> +    properties:
> +      compatible:
> +        const: ti,tps6594-rtc
> +
> +  gpio:
> +    type: object
> +    unevaluatedProperties: false
> +    properties:
> +      compatible:
> +        const: ti,tps6594-gpio

GPIO, but not using the GPIO binding?

As Krzysztof pointed out, none of this needs child nodes. You have them 
just for convenience of instantiating Linux drivers.

> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    i2c0 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        pmic: pmic@48 {
> +            compatible = "ti,tps6594";
> +            reg = <0x48>;
> +
> +            rtc {
> +                compatible = "ti,tps6594-rtc";
> +            };
> +
> +            gpio {
> +                compatible = "ti,tps6594-gpio";
> +            };
> +        };
> +    };
> +
> +...
> -- 
> 2.38.GIT
> 
> 

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Re: [PATCH v5 4/4] gpio: gpio-tps6594: add GPIO support for TPS6594 PMIC

[Bartosz Golaszewski]

On Wed, Nov 23, 2022 at 6:35 AM Matt Ranostay <mranostay@ti.com> wrote:
>
> Add support for TPS6594 PMICs GPIO interface that has 11 that can be
> configured as input or outputs.
>
> Signed-off-by: Matt Ranostay <mranostay@ti.com>
> ---

I think you forgot to collect Linus' and my review tags.

Bart

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Re: [PATCH v5 3/4] rtc: rtc-tps6594: Add support for TPS6594 PMIC RTC

[Alexandre Belloni]

Hello,

On 22/11/2022 21:35:11-0800, Matt Ranostay wrote:
> +static int tps6594_rtc_set_time(struct device *dev, struct rtc_time *tm)
> +{
> +	unsigned char rtc_data[TPS6594_NUM_TIME_REGS];
> +	struct tps6594 *tps6594 = dev_get_drvdata(dev->parent);
> +	unsigned int val;
> +	int ret;
> +
> +	rtc_data[0] = bin2bcd(tm->tm_sec);
> +	rtc_data[1] = bin2bcd(tm->tm_min);
> +	rtc_data[2] = bin2bcd(tm->tm_hour);
> +	rtc_data[3] = bin2bcd(tm->tm_mday);
> +	rtc_data[4] = bin2bcd(tm->tm_mon + 1);
> +	rtc_data[5] = bin2bcd(tm->tm_year - 100);
> +
> +	/* Stop RTC while updating the RTC time registers */
> +	ret = regmap_update_bits(tps6594->regmap, TPS6594_RTC_CTRL_1,
> +				 TPS6594_RTC_CTRL_REG_STOP_RTC, 0);
> +	if (ret < 0) {
> +		dev_err(dev, "RTC stop failed, err = %d\n", ret);

This function is way too verbose. There is no other action for the user
than retrying to set the time. You should probably remove all the
dev_err calls.

> +		return ret;
> +	}
> +
> +	/* Waiting till RTC isn't running */
> +	ret = regmap_read_poll_timeout(tps6594->regmap, TPS6594_RTC_STATUS,
> +				       val, !(val & TPS6594_RTC_STATUS_RUN),
> +				       TPS6594_RTC_POLL, TPS6594_RTC_TIMEOUT);
> +	if (ret) {
> +		dev_err(dev, "RTC_STATUS is still RUNNING\n");
> +		return ret;
> +	}
> +
> +	ret = regmap_bulk_write(tps6594->regmap, TPS6594_RTC_SECONDS,
> +		rtc_data, TPS6594_NUM_TIME_REGS);
> +	if (ret < 0) {
> +		dev_err(dev, "RTC_SECONDS reg write failed, err = %d\n", ret);
> +		return ret;
> +	}
> +
> +	/* Start back RTC */
> +	ret = regmap_update_bits(tps6594->regmap, TPS6594_RTC_CTRL_1,
> +				 TPS6594_RTC_CTRL_REG_STOP_RTC,
> +				 TPS6594_RTC_CTRL_REG_STOP_RTC);
> +	if (ret < 0)
> +		dev_err(dev, "RTC start failed, err = %d\n", ret);
> +
> +	return ret;
> +}
> +
> +static const struct rtc_class_ops tps6594_rtc_ops = {
> +	.read_time	= tps6594_rtc_read_time,
> +	.set_time	= tps6594_rtc_set_time,
> +};
> +
> +static int tps6594_rtc_probe(struct platform_device *pdev)
> +{
> +	struct tps6594_rtc *tps6594_rtc;
> +
> +	tps6594_rtc = devm_kzalloc(&pdev->dev, sizeof(*tps6594_rtc), GFP_KERNEL);
> +	if (!tps6594_rtc)
> +		return -ENOMEM;
> +
> +	tps6594_rtc->dev = &pdev->dev;
> +	platform_set_drvdata(pdev, tps6594_rtc);
> +
> +	tps6594_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
> +	if (IS_ERR(tps6594_rtc->rtc))
> +		return PTR_ERR(tps6594_rtc->rtc);
> +
> +	tps6594_rtc->rtc->ops = &tps6594_rtc_ops;
> +
> +	return devm_rtc_register_device(tps6594_rtc->rtc);
> +}
> +
> +static const struct of_device_id of_tps6594_rtc_match[] = {
> +	{ .compatible = "ti,tps6594-rtc", },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, of_tps6594_rtc_match);
> +
> +static struct platform_driver tps6594_rtc_driver = {
> +	.probe		= tps6594_rtc_probe,
> +	.driver		= {
> +		.name	= "tps6594-rtc",
> +		.of_match_table = of_tps6594_rtc_match,
> +	},
> +};
> +
> +module_platform_driver(tps6594_rtc_driver);
> +
> +MODULE_ALIAS("platform:tps6594-rtc");
> +MODULE_DESCRIPTION("TI TPS6594 series RTC driver");
> +MODULE_AUTHOR("Keerthy J <j-keerthy@ti.com>");
> +MODULE_LICENSE("GPL");
> -- 
> 2.38.GIT
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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Re: [PATCH v5 2/4] mfd: tps6594: Add support for TPS6594 PMIC devices

[Lee Jones]

On Tue, 22 Nov 2022, Matt Ranostay wrote:

> From: Keerthy <j-keerthy@ti.com>
> 
> The TPS6594 chip is a PMIC, and contains the following components:
> 
> - GPIO controller
> - RTC
> 
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> Signed-off-by: Matt Ranostay <mranostay@ti.com>
> ---
>  drivers/mfd/Kconfig         |  14 +++++
>  drivers/mfd/Makefile        |   1 +
>  drivers/mfd/tps6594.c       | 113 ++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/tps6594.h |  84 +++++++++++++++++++++++++++
>  4 files changed, 212 insertions(+)
>  create mode 100644 drivers/mfd/tps6594.c
>  create mode 100644 include/linux/mfd/tps6594.h
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 6653d03e0fe3..c54f2959a200 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1596,6 +1596,20 @@ config MFD_TI_LP873X
>  	  This driver can also be built as a module. If so, the module
>  	  will be called lp873x.
>  
> +config MFD_TPS6594
> +	tristate "TI TPS6594 Power Management IC"
> +	depends on I2C && OF
> +	select MFD_CORE
> +	select REGMAP_I2C
> +	help
> +	  If you say yes here then you get support for the TPS6594 series of
> +	  Power Management Integrated Circuits (PMIC).
> +	  These include voltage regulators, RTS, configurable
> +	  General Purpose Outputs (GPO) that are used in portable devices.
> +
> +	  This driver can also be built as a module. If so, the module
> +	  will be called tps6594.
> +
>  config MFD_TI_LP87565
>  	tristate "TI LP87565 Power Management IC"
>  	depends on I2C && OF
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 4dd479212b3a..b4fdfcc57831 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -101,6 +101,7 @@ obj-$(CONFIG_MFD_TPS65910)	+= tps65910.o
>  obj-$(CONFIG_MFD_TPS65912)	+= tps65912-core.o
>  obj-$(CONFIG_MFD_TPS65912_I2C)	+= tps65912-i2c.o
>  obj-$(CONFIG_MFD_TPS65912_SPI)  += tps65912-spi.o
> +obj-$(CONFIG_MFD_TPS6594)	+= tps6594.o
>  obj-$(CONFIG_MENELAUS)		+= menelaus.o
>  
>  obj-$(CONFIG_TWL4030_CORE)	+= twl-core.o twl4030-irq.o twl6030-irq.o
> diff --git a/drivers/mfd/tps6594.c b/drivers/mfd/tps6594.c
> new file mode 100644
> index 000000000000..a7f80833e8fc
> --- /dev/null
> +++ b/drivers/mfd/tps6594.c
> @@ -0,0 +1,113 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Driver for TPS6594 PMIC chips
> + *
> + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> + * Author: Keerthy <j-keerthy@ti.com>
> + */
> +
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/tps6594.h>
> +#include <linux/module.h>
> +#include <linux/i2c.h>
> +#include <linux/regmap.h>

Nit: Alphabetical.

> +static const struct regmap_config tps6594_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = TPS6594_REG_MAX,
> +};
> +
> +static const struct mfd_cell tps6594_cells[] = {
> +	{ .name = "tps6594-gpio" },
> +	{ .name = "tps6594-rtc" },
> +};
> +
> +static struct tps6594 *tps;
> +
> +static void tps6594_power_off(void)
> +{
> +	regmap_write(tps->regmap, TPS6594_FSM_NSLEEP_TRIGGERS,
> +		TPS6594_FSM_NSLEEP_NSLEEP1B | TPS6594_FSM_NSLEEP_NSLEEP2B);

Any chance we can align against the open parentheses?

> +	regmap_write(tps->regmap, TPS6594_INT_STARTUP,
> +		TPS6594_INT_STARTUP_NPWRON_START_INT |
> +		TPS6594_INT_STARTUP_ENABLE_INT | TPS6594_INT_STARTUP_RTC_INT |
> +		TPS6594_INT_STARTUP_SOFT_REBOOT_INT);
> +
> +	regmap_write(tps->regmap, TPS6594_INT_MISC,
> +		TPS6594_INT_MISC_BIST_PASS_INT |
> +		TPS6594_INT_MISC_EXT_CLK_INT | TPS6594_INT_MISC_TWARN_INT);
> +
> +	regmap_write(tps->regmap, TPS6594_CONFIG_1,
> +		TPS6594_CONFIG_NSLEEP1_MASK | TPS6594_CONFIG_NSLEEP2_MASK);
> +
> +	regmap_write(tps->regmap, TPS6594_FSM_I2C_TRIGGERS,
> +		TPS6594_FSM_I2C_TRIGGERS_I2C0);
> +}
> +
> +static int tps6594_probe(struct i2c_client *client)
> +{
> +	struct tps6594 *ddata;
> +	struct device_node *node = client->dev.of_node;
> +	unsigned int otpid;
> +	int ret;
> +
> +	ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
> +	if (!ddata)
> +		return -ENOMEM;
> +
> +	ddata->dev = &client->dev;
> +
> +	ddata->regmap = devm_regmap_init_i2c(client, &tps6594_regmap_config);
> +	if (IS_ERR(ddata->regmap))
> +		return dev_err_probe(ddata->dev, PTR_ERR(ddata->regmap),
> +			"Failed to initialize register map\n");
> +
> +	ret = regmap_read(ddata->regmap, TPS6594_REG_DEV_REV, &otpid);
> +	if (ret)
> +		return dev_err_probe(ddata->dev, ret, "Failed to read OTP ID\n");
> +
> +	ddata->rev = otpid;
> +	i2c_set_clientdata(client, ddata);
> +
> +	ret = mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, tps6594_cells,
> +			      ARRAY_SIZE(tps6594_cells), NULL, 0, NULL);
> +	if (ret)
> +		return dev_err_probe(ddata->dev, ret, "Failed to register cells\n");
> +
> +	tps = ddata;

This should be in the if() statement below, no?

> +	if (of_property_read_bool(node, "ti,system-power-controller"))
> +		pm_power_off = tps6594_power_off;
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id of_tps6594_match_table[] = {
> +	{ .compatible = "ti,tps6594", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, of_tps6594_match_table);
> +
> +static const struct i2c_device_id tps6594_id_table[] = {
> +	{ "tps6594", 0 },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(i2c, tps6594_id_table);

If you're using .probe_new() you can omit this table.

> +static struct i2c_driver tps6594_driver = {
> +	.driver	= {
> +		.name	= "tps6594",
> +		.of_match_table = of_tps6594_match_table,
> +	},
> +	.probe_new	= tps6594_probe,
> +	.id_table	= tps6594_id_table,
> +};
> +module_i2c_driver(tps6594_driver);
> +
> +MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
> +MODULE_DESCRIPTION("TPS6594 PMIC device driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/tps6594.h b/include/linux/mfd/tps6594.h
> new file mode 100644
> index 000000000000..f721ec9880dd
> --- /dev/null
> +++ b/include/linux/mfd/tps6594.h
> @@ -0,0 +1,84 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Core driver interface for TI TPS6594 PMIC family
> + *
> + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +#ifndef __MFD_TPS6594_H
> +#define __MFD_TPS6594_H
> +
> +#include <linux/bits.h>
> +
> +/* TPS6594 chip ID list */
> +#define TPS6594			0x00
> +
> +/* All register addresses */
> +#define TPS6594_REG_DEV_REV			0x01
> +#define TPS6594_INT_STARTUP			0x65
> +#define TPS6594_INT_MISC			0x66
> +#define TPS6594_CONFIG_1			0x7d
> +#define TPS6594_FSM_I2C_TRIGGERS		0x85
> +#define TPS6594_FSM_NSLEEP_TRIGGERS		0x86
> +
> +#define TPS6594_RTC_SECONDS			0xb5
> +#define TPS6594_RTC_MINUTES			0xb6
> +#define TPS6594_RTC_HOURS			0xb7
> +#define TPS6594_RTC_DAYS			0xb8
> +#define TPS6594_RTC_MONTHS			0xb9
> +#define TPS6594_RTC_YEARS			0xba
> +#define TPS6594_RTC_WEEKS			0xbb
> +#define TPS6594_ALARM_SECONDS			0xbc
> +#define TPS6594_ALARM_MINUTES			0xbd
> +#define TPS6594_ALARM_HOURS			0xbe
> +#define TPS6594_ALARM_DAYS			0xbf
> +#define TPS6594_ALARM_MONTHS			0xc0
> +#define TPS6594_ALARM_YEARS			0xc1
> +#define TPS6594_RTC_CTRL_1			0xc2
> +#define TPS6594_RTC_CTRL_2			0xc3
> +#define TPS6594_RTC_STATUS			0xc4
> +#define TPS6594_RTC_INTERRUPTS			0xc5
> +#define TPS6594_REG_MAX			0xd0
> +
> +/* Register field definitions */
> +#define TPS6594_DEV_REV_DEV_ID			0xff
> +
> +#define TPS6594_INT_STARTUP_NPWRON_START_INT	BIT(0)
> +#define TPS6594_INT_STARTUP_ENABLE_INT		BIT(1)
> +#define TPS6594_INT_STARTUP_RTC_INT		BIT(2)
> +#define TPS6594_INT_STARTUP_FSD_INT		BIT(4)
> +#define TPS6594_INT_STARTUP_SOFT_REBOOT_INT	BIT(5)
> +
> +#define TPS6594_INT_MISC_BIST_PASS_INT		BIT(0)
> +#define TPS6594_INT_MISC_EXT_CLK_INT		BIT(1)
> +#define TPS6594_INT_MISC_TWARN_INT		BIT(3)
> +
> +#define TPS6594_CONFIG_NSLEEP1_MASK		BIT(6)
> +#define TPS6594_CONFIG_NSLEEP2_MASK		BIT(7)
> +
> +#define TPS6594_FSM_I2C_TRIGGERS_I2C0		BIT(0)
> +
> +#define TPS6594_FSM_NSLEEP_NSLEEP1B		BIT(0)
> +#define TPS6594_FSM_NSLEEP_NSLEEP2B		BIT(1)
> +
> +#define TPS6594_RTC_CTRL_REG_GET_TIME		BIT(6)
> +#define TPS6594_RTC_CTRL_REG_STOP_RTC		BIT(0)
> +#define TPS6594_RTC_INTERRUPTS_REG_IT_ALARM	BIT(3)
> +
> +#define TPS6594_RTC_STATUS_RUN			BIT(1)
> +
> +/**
> + * struct tps6594 - state holder for the tps6594 driver
> + * @dev: struct device pointer for MFD device
> + * @rev: revision of the tps6594
> + * @lock: lock guarding the data structure
> + * @regmap: register map of the tps6594 PMIC
> + *
> + * Device data may be used to access the TPS6594 chip
> + */

This will not pass a W=1 build - please fix.

> +struct tps6594 {
> +	struct device *dev;
> +	u8 rev;
> +	struct regmap *regmap;
> +};
> +#endif /* __MFD_TPS6594_H */
> -- 
> 2.38.GIT
> 

-- 
Lee Jones [李琼斯]

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