[PATCH v10 6/8] platform/x86: int3472: tps68470: add board data for Dell Latitude 5285

[Thierry Chatard]

The Dell Latitude 5285 2-in-1 has two cameras connected through a TPS68470
PMIC/clock/GPIO hub:

  Front: OV5670 (ACPI INT3479) on I2C4
  Back:  OV8858 (ACPI INT3477) on I2C2, daisy-chained behind the TPS68470
         S_I2C port (controlled by reg 0x43 S_I2C_CTL)

Add the regulator supply map, GPIO lookup tables and a static clock
consumer list (for both sensors, to work around the broken INT3479 _DEP)
for this machine, and wire it into the board-data DMI table.

Regulator mapping:
  CORE -> dvdd/INT3477, ANA -> avdd/INT3477, VSIO -> dovdd/INT3477 (opens
  the S_I2C passthrough), AUX1 -> dvdd/INT3479, AUX2 -> dovdd/INT3479,
  VIO kept always_on. VSIO also supplies avdd for INT3479 (OV5670).

Assisted-by: Claude Code:claude-opus-4-8
Signed-off-by: Thierry Chatard <tchatard@xxxxxxxxx>
---
 .../x86/intel/int3472/tps68470_board_data.c   | 160 ++++++++++++++++++
 1 file changed, 160 insertions(+)

diff --git a/drivers/platform/x86/intel/int3472/tps68470_board_data.c b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
index c2ec802fc..90094732e 100644
--- a/drivers/platform/x86/intel/int3472/tps68470_board_data.c
+++ b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
@@ -464,6 +464,159 @@ static const struct int3472_tps68470_board_data intel_nvl_tps68470_board_data =
 	},
 };
 
+/* Settings for Dell Latitude 5285 2-in-1 */
+
+/*
+ * The BIOS leaves GNVS field C0TP at zero, which causes INT3479's _DEP to
+ * resolve to PCI0 instead of the INT3472 device. Provide a static clock
+ * consumer list so probe registers MCLK lookups for both sensors regardless
+ * of the broken _DEP traversal.
+ */
+static const struct tps68470_clk_consumer dell_5285_clk_consumers[] = {
+	{ .consumer_dev_name = "i2c-INT3477:00" },	/* OV8858 rear camera */
+	{ .consumer_dev_name = "i2c-INT3479:00" },	/* OV5670 front camera */
+};
+
+static struct regulator_consumer_supply dell_5285_int3477_ana_consumer_supplies[] = {
+	REGULATOR_SUPPLY("avdd", "i2c-INT3477:00"),
+};
+
+static struct regulator_consumer_supply dell_5285_int3477_core_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dvdd", "i2c-INT3477:00"),
+};
+
+/*
+ * VSIO controls the S_I2C_CTL passthrough; its voltage must match VIO
+ * (both 1800600 uV). dovdd/INT3477 enables the passthrough when OV8858
+ * opens its I2C path. avdd/INT3479 provides the OV5670 analog supply.
+ */
+static struct regulator_consumer_supply dell_5285_int3477_vsio_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dovdd", "i2c-INT3477:00"),
+	REGULATOR_SUPPLY("avdd", "i2c-INT3479:00"),
+};
+
+static struct regulator_consumer_supply dell_5285_int3479_aux1_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dvdd", "i2c-INT3479:00"),
+};
+
+static struct regulator_consumer_supply dell_5285_int3479_aux2_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dovdd", "i2c-INT3479:00"),
+};
+
+static const struct regulator_init_data dell_5285_tps68470_core_reg_init_data = {
+	.constraints = {
+		.min_uV = 1200000,
+		.max_uV = 1200000,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(dell_5285_int3477_core_consumer_supplies),
+	.consumer_supplies = dell_5285_int3477_core_consumer_supplies,
+};
+
+static const struct regulator_init_data dell_5285_tps68470_ana_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(dell_5285_int3477_ana_consumer_supplies),
+	.consumer_supplies = dell_5285_int3477_ana_consumer_supplies,
+};
+
+static const struct regulator_init_data dell_5285_tps68470_vcm_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = 0,
+	.consumer_supplies = NULL,
+};
+
+static const struct regulator_init_data dell_5285_tps68470_vsio_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(dell_5285_int3477_vsio_consumer_supplies),
+	.consumer_supplies = dell_5285_int3477_vsio_consumer_supplies,
+};
+
+static const struct regulator_init_data dell_5285_tps68470_aux1_reg_init_data = {
+	.constraints = {
+		.min_uV = 1213200,
+		.max_uV = 1213200,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(dell_5285_int3479_aux1_consumer_supplies),
+	.consumer_supplies = dell_5285_int3479_aux1_consumer_supplies,
+};
+
+static const struct regulator_init_data dell_5285_tps68470_aux2_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(dell_5285_int3479_aux2_consumer_supplies),
+	.consumer_supplies = dell_5285_int3479_aux2_consumer_supplies,
+};
+
+static const struct tps68470_regulator_platform_data dell_5285_tps68470_pdata = {
+	.reg_init_data = {
+		[TPS68470_CORE] = &dell_5285_tps68470_core_reg_init_data,
+		[TPS68470_ANA] = &dell_5285_tps68470_ana_reg_init_data,
+		[TPS68470_VCM] = &dell_5285_tps68470_vcm_reg_init_data,
+		[TPS68470_VIO] = &common_tps68470_vio_reg_init_data,
+		[TPS68470_VSIO] = &dell_5285_tps68470_vsio_reg_init_data,
+		[TPS68470_AUX1] = &dell_5285_tps68470_aux1_reg_init_data,
+		[TPS68470_AUX2] = &dell_5285_tps68470_aux2_reg_init_data,
+	},
+};
+
+static struct gpiod_lookup_table dell_5285_int3477_gpios = {
+	.dev_id = "i2c-INT3477:00",
+	.table = {
+		/*
+		 * TPS68470 GPIO9 = s_resetn (secondary camera reset, active-low)
+		 * TPS68470 GPIO7 = s_enable (secondary camera enable/powerdown)
+		 * These logic outputs are specifically designed for secondary
+		 * camera control on the TPS68470. Matches Surface Go pattern.
+		 */
+		GPIO_LOOKUP("tps68470-gpio", 9, "reset", GPIO_ACTIVE_LOW),
+		GPIO_LOOKUP("tps68470-gpio", 7, "powerdown", GPIO_ACTIVE_LOW),
+		{ }
+	}
+};
+
+static struct gpiod_lookup_table dell_5285_int3479_gpios = {
+	.dev_id = "i2c-INT3479:00",
+	.table = {
+		GPIO_LOOKUP("tps68470-gpio", 3, "reset", GPIO_ACTIVE_LOW),
+		GPIO_LOOKUP("tps68470-gpio", 4, "powerdown", GPIO_ACTIVE_LOW),
+		{ }
+	}
+};
+
+static const struct int3472_tps68470_board_data dell_5285_tps68470_board_data = {
+	.dev_name = "i2c-INT3472:05",
+	.tps68470_regulator_pdata = &dell_5285_tps68470_pdata,
+	.n_clk_consumers = ARRAY_SIZE(dell_5285_clk_consumers),
+	.clk_consumers = dell_5285_clk_consumers,
+	.n_gpiod_lookups = 2,
+	.tps68470_gpio_lookup_tables = {
+		&dell_5285_int3477_gpios,
+		&dell_5285_int3479_gpios,
+	},
+};
+
 static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
 	{
 		.matches = {
@@ -524,6 +677,13 @@ static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
 		},
 		.driver_data = (void *)&intel_nvl_tps68470_board_data,
 	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 5285"),
+		},
+		.driver_data = (void *)&dell_5285_tps68470_board_data,
+	},
 	{ }
 };
 
-- 
2.53.0