[PATCH v10 0/2] Add TPS68470 power supply support for ov13b10 sensor

[PATCH v10 0/2] Add TPS68470 power supply support for ov13b10 sensor

[Arun T]

This patch series adds power supply management support for the OV13B10 camera sensor when used with TPS68470 PMIC, commonly used on Intel-based camera platforms.

The OV13B10 sensor requires three power supplies (DOVDD, AVDD, DVDD) which are provided by the TPS68470 PMIC.
This series implements proper regulator framework integration to manage these power supplies during sensor power on/off sequences.

Changes in V10:
        - Checked checkPatches for new patches
        - Configured GPIO1 and GPIO2 for tps68470 daisy chain operation

Suggested by Sakari:
        - Check checkpatch for tab/new line issues
        - Configure GPIO 1 and GPIO 2 for daisy chain operation 

Changes in V9:
        - Removed explicity added reviewer names
        - corrected space issues

Suggested by Sakari:
        - Remove explicity reviewer name
        - Resolve extra line

Changes in V8:
        - Removed explicity added reviewer name
        - corrected reviewer name format

Suggested by Sakari:
        - Remove explicitly added reviewer name

Suggested by Ilpo Järvinen:
        - Reviewer name misformatted

Changes in V7:
        - Rebased two patches top of "adding support for an MSI laptop" Patches
        - Removed unused regulator init data
        - Added VCM regulator names passed to appropriate device sensor device

Suggested by Sakari:
        - Asked to add patches top "adding support for an MSI laptop"
        - Removed unused regulator init data

Changes in V6:
        - Changed consumer supply arrays from int3472_* to ovti13b1_* and update all references.
        - Removed consumer supply zero-init fields
        - Updated commit message for ov13b10 driver and rewritten for regulator bulk support
        - Updated <linux/regulator/consumer.h> in alphabetical order

Suggested by Dan Scally:
        - Rename consumer supply arrays to ovti13b1_* naming
        - Drop explicit 0 initialization for empty consumer lists
        - Add <linux/regulator/consumer.h> in alphabetical order

Changes in V5:
        - keep supply names to only those consumed for sensor driver like dvdd, avdd, dovdd regulators
        - Removed always_on flag for other power sources except only VSIO power rail
        - Removed unused gpio names (s_idle/s_enable) in gpio lookup table
        - changed gpio lookup table name as intel_nvl_ovti13b1_gpios

Suggested by Dan Scally:
        - Limit regulator supplies to only those consumed by sensor driver: Keep only dvdd, avdd, dovdd; remove unused vdd, vsio, vddd, vdda, vdddo mapping
        - Only VSIO should be forced always-on; drop it from CORE, ANA, VCM, and VIO rails to reduce power draw.
        - Rename table to intel_nvl_ovti13b1_gpios, keep only reset GPIO (remove unsupported s_idle and s_enable)
        - Remove gpio lookup table name like intel_nvl_ovti13b1_gpios

Suggested by Sakari Alius:
         - Asked to remove always_on flag for all power sources except vsio

Changes in v4:
        - Discrete INT3472 supplying regulator to i2c-OVTI13B1:00 and tps68470 supplying regulator to i2c-OVTI13B1:01.
        - Change Analog regulator name as avdd for tps68470 pmic
        - Fixed regulator_consumer_supply maps to i2c-OVTI13B1:01 device.
        - Removed vdd regulator from Power supply names list

Suggested by Hans:
        - No "avdd" found, only "vdda" and "ana" - check if "ana" should be changed to "avdd".
        - Drop unused regulator maps. Only keep the 3 maps used by sensor-driver.
        - For "i2c-OVTI13B1:01" consumer, only map "dovdd", "avdd", and "dvdd" supplies.

Changes in v3:
        - Fixed check patch errors as updated by sakari
        - Enabled VCM regulator for ov13b10 sensor to enable autofocus to work

Suggested by Sakari:
        - Add include header file in alphabetical order
        - Remove extra space
        - Asked to check vcm instance

Changes in v2:
        - Added power supply names array for the three required regulators
        - Implement regulator handling with devm_regulator_bulk_get()
        - Add regulator_bulk_enable() and regulator_bulk_disable() for sensor power on/off sequence

Suggested by Hans:
        - Add multiple regulators you should use the bulk regulator API
        - Use use "reset" instead of "s_resetn" for parse gpio name.
        - Add diffent regulator power supplies  in single array

Arun T (2):
  platform/x86: int3472: Add TPS68470 board data for Intel nvl
  media: ov13b10: Support multiple regulators

 drivers/media/i2c/ov13b10.c                   |  47 +++----
 .../x86/intel/int3472/tps68470_board_data.c   | 116 ++++++++++++++++++
 2 files changed, 142 insertions(+), 21 deletions(-)

-- 
2.43.0

[PATCH v10 1/2] platform/x86: int3472: Add TPS68470 board data for Intel nvl

[Arun T]

The Intel NVL platform uses IPU8 is powered by a TPS68470 PMIC,requiring board
data to configure the GPIOs and regulators for proper camera sensor operation.

Signed-off-by: Arun T <arun.t@intel.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
---
 .../x86/intel/int3472/tps68470_board_data.c   | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)

diff --git a/drivers/platform/x86/intel/int3472/tps68470_board_data.c b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
index 6bec5a910396..9e4257f98661 100644
--- a/drivers/platform/x86/intel/int3472/tps68470_board_data.c
+++ b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
@@ -144,6 +144,24 @@ static struct regulator_consumer_supply int3479_aux2_consumer_supplies[] = {
 	REGULATOR_SUPPLY("dovdd", "i2c-INT3479:00"),
 };
 
+/* Settings for Intel NVL platform */
+
+static struct regulator_consumer_supply ovti13b1_core_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dvdd", "i2c-OVTI13B1:01"),
+};
+
+static struct regulator_consumer_supply ovti13b1_ana_consumer_supplies[] = {
+	REGULATOR_SUPPLY("avdd", "i2c-OVTI13B1:01"),
+};
+
+static struct regulator_consumer_supply ovti13b1_vcm_consumer_supplies[] = {
+	REGULATOR_SUPPLY("vcc", "i2c-OVTI13B1:01-VCM"),
+};
+
+static struct regulator_consumer_supply ovti13b1_vsio_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dovdd", "i2c-OVTI13B1:01"),
+};
+
 static const struct regulator_init_data dell_7212_tps68470_core_reg_init_data = {
 	.constraints = {
 		.min_uV = 1200000,
@@ -221,6 +239,60 @@ static const struct regulator_init_data dell_7212_tps68470_aux2_reg_init_data =
 	.consumer_supplies = int3479_aux2_consumer_supplies,
 };
 
+static const struct regulator_init_data intel_nvl_tps68470_core_reg_init_data = {
+	.constraints = {
+		.min_uV = 1200000,
+		.max_uV = 1200000,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(ovti13b1_core_consumer_supplies),
+	.consumer_supplies = ovti13b1_core_consumer_supplies,
+};
+
+static const struct regulator_init_data intel_nvl_tps68470_ana_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(ovti13b1_ana_consumer_supplies),
+	.consumer_supplies = ovti13b1_ana_consumer_supplies,
+};
+
+static const struct regulator_init_data intel_nvl_tps68470_vcm_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(ovti13b1_vcm_consumer_supplies),
+	.consumer_supplies = ovti13b1_vcm_consumer_supplies,
+};
+
+/* Ensure the always-on VIO regulator has the same voltage as VSIO */
+static const struct regulator_init_data intel_nvl_tps68470_vio_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = true,
+		.always_on = true,
+	},
+};
+
+static const struct regulator_init_data intel_nvl_tps68470_vsio_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(ovti13b1_vsio_consumer_supplies),
+	.consumer_supplies = ovti13b1_vsio_consumer_supplies,
+};
+
 static const struct tps68470_regulator_platform_data dell_7212_tps68470_pdata = {
 	.reg_init_data = {
 		[TPS68470_CORE] = &dell_7212_tps68470_core_reg_init_data,
@@ -297,6 +369,16 @@ static const struct tps68470_regulator_platform_data msi_p14_ai_evo_tps68470_pda
 	},
 };
 
+static const struct tps68470_regulator_platform_data intel_nvl_tps68470_pdata = {
+	.reg_init_data = {
+		[TPS68470_CORE] = &intel_nvl_tps68470_core_reg_init_data,
+		[TPS68470_ANA]  = &intel_nvl_tps68470_ana_reg_init_data,
+		[TPS68470_VCM]  = &intel_nvl_tps68470_vcm_reg_init_data,
+		[TPS68470_VIO] = &intel_nvl_tps68470_vio_reg_init_data,
+		[TPS68470_VSIO] = &intel_nvl_tps68470_vsio_reg_init_data,
+	},
+};
+
 static struct gpiod_lookup_table surface_go_int347a_gpios = {
 	.dev_id = "i2c-INT347A:00",
 	.table = {
@@ -336,10 +418,27 @@ static const struct property_entry msi_p14_ai_evo_gpio_props[] = {
 	{ }
 };
 
+static const struct property_entry intel_nvl_gpio_props[] = {
+	PROPERTY_ENTRY_BOOL("daisy-chain-enable"),
+	{ }
+};
+
 static const struct software_node msi_p14_ai_evo_tps68470_gpio_swnode = {
 	.properties = msi_p14_ai_evo_gpio_props,
 };
 
+static const struct software_node intel_nvl_tps68470_gpio_swnode = {
+	.properties = intel_nvl_gpio_props,
+};
+
+static struct gpiod_lookup_table intel_nvl_tps68470_gpios = {
+	.dev_id = "i2c-OVTI13B1:01",
+	.table = {
+		GPIO_LOOKUP("tps68470-gpio", 9, "reset", GPIO_ACTIVE_LOW),
+		{ }
+	}
+};
+
 static const struct int3472_tps68470_board_data surface_go_tps68470_board_data = {
 	.dev_name = "i2c-INT3472:05",
 	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
@@ -379,6 +478,16 @@ static const struct int3472_tps68470_board_data msi_p14_ai_evo_tps68470_board_da
 	},
 };
 
+static const struct int3472_tps68470_board_data intel_nvl_tps68470_board_data = {
+	.dev_name = "i2c-INT3472:04",
+	.tps68470_regulator_pdata = &intel_nvl_tps68470_pdata,
+	.tps68470_gpio_swnode = &intel_nvl_tps68470_gpio_swnode,
+	.n_gpiod_lookups = 1,
+	.tps68470_gpio_lookup_tables = {
+		&intel_nvl_tps68470_gpios,
+	},
+};
+
 static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
 	{
 		.matches = {
@@ -415,6 +524,13 @@ static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
 		},
 		.driver_data = (void *)&msi_p14_ai_evo_tps68470_board_data,
 	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Nova Lake Client Platform"),
+		},
+		.driver_data = (void *)&intel_nvl_tps68470_board_data,
+	},
 	{ }
 };
 
-- 
2.43.0

[PATCH v10 2/2] media: ov13b10: Support multiple regulators

[Arun T]

The OV13B10 sensor driver currently handles a single regulator called
avdd, however the sensor can be supplied by up to three regulators.
Update the driver to handle all of them together using the regulator
bulk API.

Signed-off-by: Arun T <arun.t@intel.com>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
---
 drivers/media/i2c/ov13b10.c | 47 ++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 21 deletions(-)

diff --git a/drivers/media/i2c/ov13b10.c b/drivers/media/i2c/ov13b10.c
index 5421874732bc..b0d34141a13a 100644
--- a/drivers/media/i2c/ov13b10.c
+++ b/drivers/media/i2c/ov13b10.c
@@ -8,6 +8,7 @@
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-fwnode.h>
@@ -699,6 +700,12 @@ static const struct ov13b10_mode supported_2_lanes_modes[] = {
 	},
 };
 
+static const char * const ov13b10_supply_names[] = {
+	"dovdd",        /* Digital I/O power */
+	"avdd",         /* Analog power */
+	"dvdd",         /* Digital core power */
+};
+
 struct ov13b10 {
 	struct device *dev;
 
@@ -708,7 +715,7 @@ struct ov13b10 {
 	struct v4l2_ctrl_handler ctrl_handler;
 
 	struct clk *img_clk;
-	struct regulator *avdd;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(ov13b10_supply_names)];
 	struct gpio_desc *reset;
 
 	/* V4L2 Controls */
@@ -1194,9 +1201,8 @@ static int ov13b10_power_off(struct device *dev)
 	struct ov13b10 *ov13b10 = to_ov13b10(sd);
 
 	gpiod_set_value_cansleep(ov13b10->reset, 1);
-
-	if (ov13b10->avdd)
-		regulator_disable(ov13b10->avdd);
+	regulator_bulk_disable(ARRAY_SIZE(ov13b10_supply_names),
+			       ov13b10->supplies);
 
 	clk_disable_unprepare(ov13b10->img_clk);
 
@@ -1214,14 +1220,12 @@ static int ov13b10_power_on(struct device *dev)
 		dev_err(dev, "failed to enable imaging clock: %d", ret);
 		return ret;
 	}
-
-	if (ov13b10->avdd) {
-		ret = regulator_enable(ov13b10->avdd);
-		if (ret < 0) {
-			dev_err(dev, "failed to enable avdd: %d", ret);
-			clk_disable_unprepare(ov13b10->img_clk);
-			return ret;
-		}
+	ret = regulator_bulk_enable(ARRAY_SIZE(ov13b10_supply_names),
+				    ov13b10->supplies);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable regulators\n");
+		clk_disable_unprepare(ov13b10->img_clk);
+		return ret;
 	}
 
 	gpiod_set_value_cansleep(ov13b10->reset, 0);
@@ -1475,7 +1479,8 @@ static int ov13b10_get_pm_resources(struct ov13b10 *ov13b)
 	unsigned long freq;
 	int ret;
 
-	ov13b->reset = devm_gpiod_get_optional(ov13b->dev, "reset", GPIOD_OUT_LOW);
+	ov13b->reset = devm_gpiod_get_optional(ov13b->dev, "reset",
+					       GPIOD_OUT_LOW);
 	if (IS_ERR(ov13b->reset))
 		return dev_err_probe(ov13b->dev, PTR_ERR(ov13b->reset),
 				     "failed to get reset gpio\n");
@@ -1491,15 +1496,15 @@ static int ov13b10_get_pm_resources(struct ov13b10 *ov13b)
 				     "external clock %lu is not supported\n",
 				     freq);
 
-	ov13b->avdd = devm_regulator_get_optional(ov13b->dev, "avdd");
-	if (IS_ERR(ov13b->avdd)) {
-		ret = PTR_ERR(ov13b->avdd);
-		ov13b->avdd = NULL;
-		if (ret != -ENODEV)
-			return dev_err_probe(ov13b->dev, ret,
-					     "failed to get avdd regulator\n");
-	}
+	for (unsigned int i = 0; i < ARRAY_SIZE(ov13b10_supply_names); i++)
+		ov13b->supplies[i].supply = ov13b10_supply_names[i];
 
+	ret = devm_regulator_bulk_get(ov13b->dev,
+				      ARRAY_SIZE(ov13b10_supply_names),
+				      ov13b->supplies);
+	if (ret)
+		return dev_err_probe(ov13b->dev, ret,
+				     "failed to get regulators\n");
 	return 0;
 }
 
-- 
2.43.0