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Thu, 19 Mar 2026 17:10:01 -0700 (PDT) From: Thierry Chatard To: linux-kernel@vger.kernel.org Cc: linux-media@vger.kernel.org, platform-driver-x86@vger.kernel.org, lee@kernel.org, djrscally@gmail.com, hansg@kernel.org, ilpo.jarvinen@linux.intel.com, mchehab@kernel.org, sakari.ailus@linux.intel.com, jacopo.mondi@ideasonboard.com, nicholas@rothemail.net, Thierry Chatard Subject: [PATCH 3/5] platform/x86: int3472: tps68470: add board data for Dell Latitude 5285 Date: Thu, 19 Mar 2026 17:09:31 -0700 Message-ID: <20260320000937.9177-4-tchatard@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260320000937.9177-1-tchatard@gmail.com> References: <20260320000937.9177-1-tchatard@gmail.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 TPS68470 S_I2C port (controlled by reg 0x43 S_I2C_CTL) GPIO mapping (TPS68470): INT3479 (OV5670): GPIO3 = reset (active-low), GPIO4 = powerdown (active-low) INT3477 (OV8858): GPIO9 = s_resetn (active-low), GPIO7 = s_enable (active-low) GPIO9 and GPIO7 are the TPS68470 secondary-port GPIOs (SGPO reg 0x22 bits 2 and 0), not regular GPDO outputs. Regulator mapping: CORE -> dvdd / INT3477 ANA -> avdd / INT3477 VIO -> dovdd / INT3477 VSIO -> avdd / INT3479 and vsio / INT3477 (always_on: keeps S_I2C_CTL non-zero from boot so OV8858 is reachable on I2C2 at any time) AUX1 -> dvdd / INT3479 AUX2 -> dovdd / INT3479 Marking VSIO always_on ensures the TPS68470 S_I2C passthrough is active from the moment the PMIC driver probes, eliminating a timing dependency between TPS68470 and ov8858 probe ordering. Signed-off-by: Thierry Chatard --- .../x86/intel/int3472/tps68470_board_data.c | 163 ++++++++++++++++++ 1 file changed, 163 insertions(+) diff --git a/drivers/platform/x86/intel/int3472/tps68470_board_data.c b/drivers/platform/x86/intel/int3472/tps68470_board_data.c index 71357a036..a5b469dcb 100644 --- a/drivers/platform/x86/intel/int3472/tps68470_board_data.c +++ b/drivers/platform/x86/intel/int3472/tps68470_board_data.c @@ -287,6 +287,162 @@ static const struct int3472_tps68470_board_data dell_7212_tps68470_board_data = }, }; +/* Settings for Dell Latitude 5285 2-in-1 */ + +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"), +}; + +static struct regulator_consumer_supply dell_5285_int3477_vio_consumer_supplies[] = { + REGULATOR_SUPPLY("dovdd", "i2c-INT3477:00"), +}; + +static struct regulator_consumer_supply dell_5285_int3479_vsio_consumer_supplies[] = { + REGULATOR_SUPPLY("avdd", "i2c-INT3479:00"), + /* S_I2C_CTL: must be enabled for OV8858 I2C daisy-chain access */ + REGULATOR_SUPPLY("vsio", "i2c-INT3477:00"), +}; + +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_vio_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_vio_consumer_supplies), + .consumer_supplies = dell_5285_int3477_vio_consumer_supplies, +}; + +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, + /* + * Keep S_I2C_CTL enabled from boot so OV8858 I2C daisy-chain + * is accessible before ov8858 driver probes. + */ + .always_on = 1, + }, + .num_consumer_supplies = ARRAY_SIZE(dell_5285_int3479_vsio_consumer_supplies), + .consumer_supplies = dell_5285_int3479_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] = &dell_5285_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_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 = { @@ -316,6 +472,13 @@ static const struct dmi_system_id int3472_tps68470_board_data_table[] = { }, .driver_data = (void *)&dell_7212_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, + }, { } }; -- 2.51.0