* [PATCH 0/3] Add sy7802 flash led driver
@ 2024-03-27 22:51 ` André Apitzsch
0 siblings, 0 replies; 10+ messages in thread
From: André Apitzsch via B4 Relay @ 2024-03-27 22:51 UTC (permalink / raw)
To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson,
Konrad Dybcio
Cc: linux-leds, devicetree, linux-kernel, linux-hardening,
linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch
This series introduces a driver for the Silergy SY7802 charge pump used
in the BQ Aquaris M5 and X5 smartphones.
The implementation is based on information extracted from downstream as
the datasheet provided by a distributor of the hardware didn't include
any information about the i2c register description.
Signed-off-by: André Apitzsch <git@apitzsch.eu>
---
André Apitzsch (3):
dt-bindings: leds: Add Silergy SY7802 flash LED
leds: sy7802: Add support for Silergy SY7802 flash LED controller
arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash
.../devicetree/bindings/leds/silergy,sy7802.yaml | 96 ++++
.../boot/dts/qcom/msm8939-longcheer-l9100.dts | 26 +
drivers/leds/flash/Kconfig | 11 +
drivers/leds/flash/Makefile | 1 +
drivers/leds/flash/leds-sy7802.c | 532 +++++++++++++++++++++
5 files changed, 666 insertions(+)
---
base-commit: 084c8e315db34b59d38d06e684b1a0dd07d30287
change-id: 20240325-sy7802-f40fc6f56525
Best regards,
--
André Apitzsch <git@apitzsch.eu>
^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 0/3] Add sy7802 flash led driver @ 2024-03-27 22:51 ` André Apitzsch 0 siblings, 0 replies; 10+ messages in thread From: André Apitzsch @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch This series introduces a driver for the Silergy SY7802 charge pump used in the BQ Aquaris M5 and X5 smartphones. The implementation is based on information extracted from downstream as the datasheet provided by a distributor of the hardware didn't include any information about the i2c register description. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- André Apitzsch (3): dt-bindings: leds: Add Silergy SY7802 flash LED leds: sy7802: Add support for Silergy SY7802 flash LED controller arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash .../devicetree/bindings/leds/silergy,sy7802.yaml | 96 ++++ .../boot/dts/qcom/msm8939-longcheer-l9100.dts | 26 + drivers/leds/flash/Kconfig | 11 + drivers/leds/flash/Makefile | 1 + drivers/leds/flash/leds-sy7802.c | 532 +++++++++++++++++++++ 5 files changed, 666 insertions(+) --- base-commit: 084c8e315db34b59d38d06e684b1a0dd07d30287 change-id: 20240325-sy7802-f40fc6f56525 Best regards, -- André Apitzsch <git@apitzsch.eu> ^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 1/3] dt-bindings: leds: Add Silergy SY7802 flash LED 2024-03-27 22:51 ` André Apitzsch @ 2024-03-27 22:51 ` André Apitzsch -1 siblings, 0 replies; 10+ messages in thread From: André Apitzsch via B4 Relay @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch From: André Apitzsch <git@apitzsch.eu> Document Silergy SY7802 flash LED driver devicetree bindings. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- .../devicetree/bindings/leds/silergy,sy7802.yaml | 96 ++++++++++++++++++++++ 1 file changed, 96 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml b/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml new file mode 100644 index 000000000000..d32efac8baa6 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/silergy,sy7802.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Silergy SY7802 1800mA Boost Charge Pump LED Driver + +maintainers: + - André Apitzsch <git@apitzsch.eu> + +description: | + The SY7802 is a current-regulated charge pump which can regulate two current + levels for Flash and Torch modes. + + The SY7802 is a high-current synchronous boost converter with 2-channel + high side current sources. Each channel is able to deliver 900mA current. + +properties: + compatible: + enum: + - silergy,sy7802 + + reg: + maxItems: 1 + + enable-gpios: + maxItems: 1 + description: A connection to the 'EN' pin. + + flash-gpios: + maxItems: 1 + description: A connection to the 'FLEN' pin. + + vin-supply: + description: Regulator providing power to the 'VIN' pin. + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[0-1]$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + description: Index of the LED. + minimum: 0 + maximum: 1 + + led-sources: + allOf: + - minItems: 1 + maxItems: 2 + items: + minimum: 0 + maximum: 1 + + required: + - reg + - led-sources + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + - enable-gpios + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/leds/common.h> + + flash-led-controller@53 { + compatible = "silergy,sy7802"; + reg = <0x53>; + #address-cells = <1>; + #size-cells = <0>; + + enable-gpios = <&tlmm 16 GPIO_ACTIVE_HIGH>; + + led@0 { + reg = <0>; + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_WHITE>; + led-sources = <0>, <1>; + }; + }; -- 2.44.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH 1/3] dt-bindings: leds: Add Silergy SY7802 flash LED @ 2024-03-27 22:51 ` André Apitzsch 0 siblings, 0 replies; 10+ messages in thread From: André Apitzsch @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch Document Silergy SY7802 flash LED driver devicetree bindings. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- .../devicetree/bindings/leds/silergy,sy7802.yaml | 96 ++++++++++++++++++++++ 1 file changed, 96 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml b/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml new file mode 100644 index 000000000000..d32efac8baa6 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/silergy,sy7802.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Silergy SY7802 1800mA Boost Charge Pump LED Driver + +maintainers: + - André Apitzsch <git@apitzsch.eu> + +description: | + The SY7802 is a current-regulated charge pump which can regulate two current + levels for Flash and Torch modes. + + The SY7802 is a high-current synchronous boost converter with 2-channel + high side current sources. Each channel is able to deliver 900mA current. + +properties: + compatible: + enum: + - silergy,sy7802 + + reg: + maxItems: 1 + + enable-gpios: + maxItems: 1 + description: A connection to the 'EN' pin. + + flash-gpios: + maxItems: 1 + description: A connection to the 'FLEN' pin. + + vin-supply: + description: Regulator providing power to the 'VIN' pin. + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[0-1]$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + description: Index of the LED. + minimum: 0 + maximum: 1 + + led-sources: + allOf: + - minItems: 1 + maxItems: 2 + items: + minimum: 0 + maximum: 1 + + required: + - reg + - led-sources + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + - enable-gpios + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/leds/common.h> + + flash-led-controller@53 { + compatible = "silergy,sy7802"; + reg = <0x53>; + #address-cells = <1>; + #size-cells = <0>; + + enable-gpios = <&tlmm 16 GPIO_ACTIVE_HIGH>; + + led@0 { + reg = <0>; + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_WHITE>; + led-sources = <0>, <1>; + }; + }; -- 2.44.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* Re: [PATCH 1/3] dt-bindings: leds: Add Silergy SY7802 flash LED 2024-03-27 22:51 ` André Apitzsch (?) @ 2024-03-28 0:44 ` Rob Herring -1 siblings, 0 replies; 10+ messages in thread From: Rob Herring @ 2024-03-28 0:44 UTC (permalink / raw) To: André Apitzsch Cc: ~postmarketos/upstreaming, linux-kernel, Kees Cook, linux-arm-msm, Lee Jones, Konrad Dybcio, Pavel Machek, linux-hardening, Conor Dooley, Krzysztof Kozlowski, Bjorn Andersson, linux-leds, devicetree, Gustavo A. R. Silva On Wed, 27 Mar 2024 23:51:33 +0100, André Apitzsch wrote: > Document Silergy SY7802 flash LED driver devicetree bindings. > > Signed-off-by: André Apitzsch <git@apitzsch.eu> > --- > .../devicetree/bindings/leds/silergy,sy7802.yaml | 96 ++++++++++++++++++++++ > 1 file changed, 96 insertions(+) > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check' on your patch (DT_CHECKER_FLAGS is new in v5.13): yamllint warnings/errors: dtschema/dtc warnings/errors: Documentation/devicetree/bindings/leds/silergy,sy7802.example.dts:23.13-26: Warning (reg_format): /example-0/flash-led-controller@53:reg: property has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1) Documentation/devicetree/bindings/leds/silergy,sy7802.example.dtb: Warning (pci_device_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/leds/silergy,sy7802.example.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/leds/silergy,sy7802.example.dtb: Warning (simple_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/leds/silergy,sy7802.example.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/leds/silergy,sy7802.example.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format' doc reference errors (make refcheckdocs): See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20240327-sy7802-v1-1-db74ab32faaf@apitzsch.eu The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema. ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 1/3] dt-bindings: leds: Add Silergy SY7802 flash LED 2024-03-27 22:51 ` André Apitzsch (?) (?) @ 2024-03-28 18:50 ` Rob Herring -1 siblings, 0 replies; 10+ messages in thread From: Rob Herring @ 2024-03-28 18:50 UTC (permalink / raw) To: André Apitzsch Cc: Pavel Machek, Lee Jones, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio, linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming On Wed, Mar 27, 2024 at 11:51:33PM +0100, André Apitzsch wrote: > Document Silergy SY7802 flash LED driver devicetree bindings. > > Signed-off-by: André Apitzsch <git@apitzsch.eu> > --- > .../devicetree/bindings/leds/silergy,sy7802.yaml | 96 ++++++++++++++++++++++ > 1 file changed, 96 insertions(+) > > diff --git a/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml b/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml > new file mode 100644 > index 000000000000..d32efac8baa6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/silergy,sy7802.yaml > @@ -0,0 +1,96 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/leds/silergy,sy7802.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Silergy SY7802 1800mA Boost Charge Pump LED Driver > + > +maintainers: > + - André Apitzsch <git@apitzsch.eu> > + > +description: | > + The SY7802 is a current-regulated charge pump which can regulate two current > + levels for Flash and Torch modes. > + > + The SY7802 is a high-current synchronous boost converter with 2-channel > + high side current sources. Each channel is able to deliver 900mA current. > + > +properties: > + compatible: > + enum: > + - silergy,sy7802 > + > + reg: > + maxItems: 1 > + > + enable-gpios: > + maxItems: 1 > + description: A connection to the 'EN' pin. > + > + flash-gpios: > + maxItems: 1 > + description: A connection to the 'FLEN' pin. > + > + vin-supply: > + description: Regulator providing power to the 'VIN' pin. > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 0 > + > +patternProperties: > + "^led@[0-1]$": > + type: object > + $ref: common.yaml# > + unevaluatedProperties: false > + > + properties: > + reg: > + description: Index of the LED. > + minimum: 0 > + maximum: 1 > + > + led-sources: > + allOf: Don't need allOf here. > + - minItems: 1 > + maxItems: 2 > + items: > + minimum: 0 > + maximum: 1 > + > + required: > + - reg > + - led-sources > + > +required: > + - compatible > + - reg > + - "#address-cells" > + - "#size-cells" > + - enable-gpios > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + #include <dt-bindings/leds/common.h> > + > + flash-led-controller@53 { This needs to go under an appropriate bus node to fix the errors. i2c presumably. > + compatible = "silergy,sy7802"; > + reg = <0x53>; > + #address-cells = <1>; > + #size-cells = <0>; > + > + enable-gpios = <&tlmm 16 GPIO_ACTIVE_HIGH>; > + > + led@0 { > + reg = <0>; > + function = LED_FUNCTION_FLASH; > + color = <LED_COLOR_ID_WHITE>; > + led-sources = <0>, <1>; > + }; > + }; > > -- > 2.44.0 > ^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 2/3] leds: sy7802: Add support for Silergy SY7802 flash LED controller 2024-03-27 22:51 ` André Apitzsch @ 2024-03-27 22:51 ` André Apitzsch -1 siblings, 0 replies; 10+ messages in thread From: André Apitzsch via B4 Relay @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch From: André Apitzsch <git@apitzsch.eu> Add support for SY7802 flash LED controller. It can support up to 1.8A flash current. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- drivers/leds/flash/Kconfig | 11 + drivers/leds/flash/Makefile | 1 + drivers/leds/flash/leds-sy7802.c | 532 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 544 insertions(+) diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig index 809b6d98bb3e..f39f0bfe6eef 100644 --- a/drivers/leds/flash/Kconfig +++ b/drivers/leds/flash/Kconfig @@ -121,4 +121,15 @@ config LEDS_SGM3140 This option enables support for the SGM3140 500mA Buck/Boost Charge Pump LED Driver. +config LEDS_SY7802 + tristate "LED support for the Silergy SY7802" + depends on I2C && OF + depends on GPIOLIB + select REGMAP_I2C + help + This option enables support for the SY7802 flash LED controller. + SY7802 includes torch and flash functions with programmable current. + + This driver can be built as a module, it will be called "leds-sy7802". + endif # LEDS_CLASS_FLASH diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile index 91d60a4b7952..48860eeced79 100644 --- a/drivers/leds/flash/Makefile +++ b/drivers/leds/flash/Makefile @@ -11,3 +11,4 @@ obj-$(CONFIG_LEDS_QCOM_FLASH) += leds-qcom-flash.o obj-$(CONFIG_LEDS_RT4505) += leds-rt4505.o obj-$(CONFIG_LEDS_RT8515) += leds-rt8515.o obj-$(CONFIG_LEDS_SGM3140) += leds-sgm3140.o +obj-$(CONFIG_LEDS_SY7802) += leds-sy7802.o diff --git a/drivers/leds/flash/leds-sy7802.c b/drivers/leds/flash/leds-sy7802.c new file mode 100644 index 000000000000..c03a571b0e08 --- /dev/null +++ b/drivers/leds/flash/leds-sy7802.c @@ -0,0 +1,532 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Silergy SY7802 flash LED driver with I2C interface + * + * Copyright 2024 André Apitzsch <git@apitzsch.eu> + */ + +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/led-class-flash.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#define SY7802_MAX_LEDS 2 +#define SY7802_LED_JOINT 2 + +#define SY7802_REG_ENABLE 0x10 +#define SY7802_REG_TORCH_BRIGHTNESS 0xa0 +#define SY7802_REG_FLASH_BRIGHTNESS 0xb0 +#define SY7802_REG_FLASH_DURATION 0xc0 +#define SY7802_REG_FLAGS 0xd0 +#define SY7802_REG_CONFIG_1 0xe0 +#define SY7802_REG_CONFIG_2 0xf0 +#define SY7802_REG_VIN_MONITOR 0x80 +#define SY7802_REG_LAST_FLASH 0x81 +#define SY7802_REG_VLED_MONITOR 0x30 +#define SY7802_REG_ADC_DELAY 0x31 +#define SY7802_REG_DEV_ID 0xff + +#define SY7802_MODE_OFF 0 +#define SY7802_MODE_TORCH 2 +#define SY7802_MODE_FLASH 3 +#define SY7802_MODE_MASK GENMASK(1, 0) + +#define SY7802_LEDS_SHIFT 3 +#define SY7802_LEDS_MASK(_id) (BIT(_id) << SY7802_LEDS_SHIFT) +#define SY7802_LEDS_MASK_ALL (SY7802_LEDS_MASK(0) | SY7802_LEDS_MASK(1)) + +#define SY7802_TORCH_CURRENT_SHIFT 3 +#define SY7802_TORCH_CURRENT_MASK(_id) \ + (GENMASK(2, 0) << (SY7802_TORCH_CURRENT_SHIFT * (_id))) +#define SY7802_TORCH_CURRENT_MASK_ALL \ + (SY7802_TORCH_CURRENT_MASK(0) | SY7802_TORCH_CURRENT_MASK(1)) + +#define SY7802_FLASH_CURRENT_SHIFT 4 +#define SY7802_FLASH_CURRENT_MASK(_id) \ + (GENMASK(3, 0) << (SY7802_FLASH_CURRENT_SHIFT * (_id))) +#define SY7802_FLASH_CURRENT_MASK_ALL \ + (SY7802_FLASH_CURRENT_MASK(0) | SY7802_FLASH_CURRENT_MASK(1)) + +#define SY7802_TIMEOUT_DEFAULT_US 512000U +#define SY7802_TIMEOUT_MIN_US 32000U +#define SY7802_TIMEOUT_MAX_US 1024000U +#define SY7802_TIMEOUT_STEPSIZE_US 32000U + +#define SY7802_TORCH_BRIGHTNESS_MAX 8 + +#define SY7802_FLASH_BRIGHTNESS_DEFAULT 14 +#define SY7802_FLASH_BRIGHTNESS_MIN 0 +#define SY7802_FLASH_BRIGHTNESS_MAX 15 +#define SY7802_FLASH_BRIGHTNESS_STEP 1 + +#define SY7802_FLAG_TIMEOUT (1 << 0) +#define SY7802_FLAG_THERMAL_SHUTDOWN (1 << 1) +#define SY7802_FLAG_LED_FAULT (1 << 2) +#define SY7802_FLAG_TX1_INTERRUPT (1 << 3) +#define SY7802_FLAG_TX2_INTERRUPT (1 << 4) +#define SY7802_FLAG_LED_THERMAL_FAULT (1 << 5) +#define SY7802_FLAG_FLASH_INPUT_VOLTAGE_LOW (1 << 6) +#define SY7802_FLAG_INPUT_VOLTAGE_LOW (1 << 7) + +#define SY7802_CHIP_ID 0x51 + +static const struct reg_default sy7802_regmap_defs[] = { + { SY7802_REG_ENABLE, SY7802_LEDS_MASK_ALL }, + { SY7802_REG_TORCH_BRIGHTNESS, 0x92 }, + { SY7802_REG_FLASH_BRIGHTNESS, SY7802_FLASH_BRIGHTNESS_DEFAULT | + SY7802_FLASH_BRIGHTNESS_DEFAULT << SY7802_FLASH_CURRENT_SHIFT }, + { SY7802_REG_FLASH_DURATION, 0x6f }, + { SY7802_REG_FLAGS, 0x0 }, + { SY7802_REG_CONFIG_1, 0x68 }, + { SY7802_REG_CONFIG_2, 0xf0 }, +}; + +struct sy7802_led { + struct led_classdev_flash flash; + struct sy7802 *chip; + u8 led_no; +}; + +struct sy7802 { + struct mutex mutex; + struct device *dev; + struct regmap *regmap; + + struct gpio_desc *enable_gpio; + struct regulator *vin_regulator; + + unsigned int fled_strobe_used; + unsigned int fled_torch_used; + unsigned int leds_active; + int num_leds; + struct sy7802_led leds[] __counted_by(num_leds); +}; + +static int sy7802_torch_brightness_set(struct led_classdev *lcdev, enum led_brightness level) +{ + struct sy7802_led *led = container_of(lcdev, struct sy7802_led, flash.led_cdev); + u32 led_enable_mask = led->led_no == SY7802_LED_JOINT ? SY7802_LEDS_MASK_ALL : + SY7802_LEDS_MASK(led->led_no); + u32 enable_mask = SY7802_MODE_MASK | led_enable_mask; + u32 val = level ? led_enable_mask : SY7802_MODE_OFF; + struct sy7802 *chip = led->chip; + u32 curr; + u32 mask; + int ret; + + mutex_lock(&chip->mutex); + + /* + * There is only one set of flash control logic, and this flag is used to check if 'strobe' + * is currently being used. + */ + if (chip->fled_strobe_used) { + dev_warn(chip->dev, "Please disable strobe first [%d]\n", chip->fled_strobe_used); + ret = -EBUSY; + goto unlock; + } + + if (level) + curr = chip->fled_torch_used | BIT(led->led_no); + else + curr = chip->fled_torch_used & ~BIT(led->led_no); + + if (curr) + val |= SY7802_MODE_TORCH; + + /* Torch needs to be disabled first to apply new brightness */ + ret = regmap_update_bits(chip->regmap, SY7802_REG_ENABLE, SY7802_MODE_MASK, + SY7802_MODE_OFF); + if (ret) + goto unlock; + + mask = led->led_no == SY7802_LED_JOINT ? SY7802_TORCH_CURRENT_MASK_ALL : + SY7802_TORCH_CURRENT_MASK(led->led_no); + + /* Register expects brightness between 0 and MAX_BRIGHTNESS - 1 */ + if (level) + level -= 1; + + level |= (level << SY7802_TORCH_CURRENT_SHIFT); + + ret = regmap_update_bits(chip->regmap, SY7802_REG_TORCH_BRIGHTNESS, mask, level); + if (ret) + goto unlock; + + ret = regmap_update_bits(chip->regmap, SY7802_REG_ENABLE, enable_mask, val); + if (ret) + goto unlock; + + chip->fled_torch_used = curr; + +unlock: + mutex_unlock(&chip->mutex); + return ret; +} + +static int sy7802_flash_brightness_set(struct led_classdev_flash *fl_cdev, u32 brightness) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct led_flash_setting *s = &fl_cdev->brightness; + u32 val = (brightness - s->min) / s->step; + struct sy7802 *chip = led->chip; + u32 mask; + int ret; + + val |= (val << SY7802_FLASH_CURRENT_SHIFT); + mask = led->led_no == SY7802_LED_JOINT ? SY7802_FLASH_CURRENT_MASK_ALL : + SY7802_FLASH_CURRENT_MASK(led->led_no); + + mutex_lock(&chip->mutex); + ret = regmap_update_bits(chip->regmap, SY7802_REG_FLASH_BRIGHTNESS, mask, val); + mutex_unlock(&chip->mutex); + + return ret; +} + +static int sy7802_strobe_set(struct led_classdev_flash *fl_cdev, bool state) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + u32 led_enable_mask = led->led_no == SY7802_LED_JOINT ? SY7802_LEDS_MASK_ALL : + SY7802_LEDS_MASK(led->led_no); + u32 enable_mask = SY7802_MODE_MASK | led_enable_mask; + u32 val = state ? led_enable_mask : SY7802_MODE_OFF; + struct sy7802 *chip = led->chip; + u32 curr; + int ret; + + mutex_lock(&chip->mutex); + + /* + * There is only one set of flash control logic, and this flag is used to check if 'torch' + * is currently being used. + */ + if (chip->fled_torch_used) { + dev_warn(chip->dev, "Please disable torch first [0x%x]\n", chip->fled_torch_used); + ret = -EBUSY; + goto unlock; + } + + if (state) + curr = chip->fled_strobe_used | BIT(led->led_no); + else + curr = chip->fled_strobe_used & ~BIT(led->led_no); + + if (curr) + val |= SY7802_MODE_FLASH; + + ret = regmap_update_bits(chip->regmap, SY7802_REG_ENABLE, enable_mask, val); + + if (ret) + goto unlock; + + chip->fled_strobe_used = curr; + +unlock: + mutex_unlock(&chip->mutex); + return ret; +} + +static int sy7802_strobe_get(struct led_classdev_flash *fl_cdev, bool *state) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct sy7802 *chip = led->chip; + + mutex_lock(&chip->mutex); + *state = !!(chip->fled_strobe_used & BIT(led->led_no)); + mutex_unlock(&chip->mutex); + + return 0; +} + +static int sy7802_timeout_set(struct led_classdev_flash *fl_cdev, + u32 timeout) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct led_flash_setting *s = &fl_cdev->timeout; + u32 val = (timeout - s->min) / s->step; + struct sy7802 *chip = led->chip; + + return regmap_write(chip->regmap, SY7802_REG_FLASH_DURATION, val); +} + +static int sy7802_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct sy7802 *chip = led->chip; + u32 val, led_faults = 0; + int ret; + + /* NOTE: reading register clears fault status */ + ret = regmap_read(chip->regmap, SY7802_REG_FLAGS, &val); + if (ret) + return ret; + + if (val & (SY7802_FLAG_FLASH_INPUT_VOLTAGE_LOW | SY7802_FLAG_INPUT_VOLTAGE_LOW)) + led_faults |= LED_FAULT_INPUT_VOLTAGE; + + if (val & SY7802_FLAG_THERMAL_SHUTDOWN) + led_faults |= LED_FAULT_OVER_TEMPERATURE; + + if (val & SY7802_FLAG_TIMEOUT) + led_faults |= LED_FAULT_TIMEOUT; + + *fault = led_faults; + return 0; +} + +static const struct led_flash_ops sy7802_flash_ops = { + .flash_brightness_set = sy7802_flash_brightness_set, + .strobe_set = sy7802_strobe_set, + .strobe_get = sy7802_strobe_get, + .timeout_set = sy7802_timeout_set, + .fault_get = sy7802_fault_get, +}; + +static void sy7802_init_flash_brightness(struct led_classdev_flash *fl_cdev) +{ + struct led_flash_setting *s; + + /* Init flash brightness setting */ + s = &fl_cdev->brightness; + s->min = SY7802_FLASH_BRIGHTNESS_MIN; + s->max = SY7802_FLASH_BRIGHTNESS_MAX; + s->step = SY7802_FLASH_BRIGHTNESS_STEP; + s->val = SY7802_FLASH_BRIGHTNESS_DEFAULT; +} + +static void sy7802_init_flash_timeout(struct led_classdev_flash *fl_cdev) +{ + struct led_flash_setting *s; + + /* Init flash timeout setting */ + s = &fl_cdev->timeout; + s->min = SY7802_TIMEOUT_MIN_US; + s->max = SY7802_TIMEOUT_MAX_US; + s->step = SY7802_TIMEOUT_STEPSIZE_US; + s->val = SY7802_TIMEOUT_DEFAULT_US; +} + +static int sy7802_led_register(struct device *dev, struct sy7802_led *led, + struct device_node *np) +{ + struct led_init_data init_data = {}; + int ret; + + init_data.fwnode = of_fwnode_handle(np); + + ret = devm_led_classdev_flash_register_ext(dev, &led->flash, &init_data); + if (ret) { + dev_err(dev, "Couldn't register flash %d\n", led->led_no); + return ret; + } + + return ret; +} + +static int sy7802_init_flash_properties(struct device *dev, struct sy7802_led *led, + struct device_node *np) +{ + struct led_classdev_flash *flash = &led->flash; + struct led_classdev *lcdev = &flash->led_cdev; + u32 sources[SY7802_MAX_LEDS]; + int i, num, ret; + + num = of_property_count_u32_elems(np, "led-sources"); + if (num < 1) { + dev_err(dev, "Not specified or wrong number of led-sources\n"); + return -EINVAL; + } + + ret = of_property_read_u32_array(np, "led-sources", sources, num); + if (ret) + return ret; + + for (i = 0; i < num; i++) { + if (sources[i] >= SY7802_MAX_LEDS) + return -EINVAL; + if (led->chip->leds_active & BIT(sources[i])) + return -EINVAL; + led->chip->leds_active |= BIT(sources[i]); + } + + /* If both channels are specified in 'led-sources', joint flash output mode is used */ + led->led_no = num == 2 ? SY7802_LED_JOINT : sources[0]; + + lcdev->max_brightness = SY7802_TORCH_BRIGHTNESS_MAX; + lcdev->brightness_set_blocking = sy7802_torch_brightness_set; + lcdev->flags |= LED_DEV_CAP_FLASH; + + flash->ops = &sy7802_flash_ops; + + sy7802_init_flash_brightness(flash); + sy7802_init_flash_timeout(flash); + + return 0; +} + +static int sy7802_chip_check(struct sy7802 *chip) +{ + struct device *dev = chip->dev; + u32 chipid; + int ret; + + ret = regmap_read(chip->regmap, SY7802_REG_DEV_ID, &chipid); + if (ret) + return dev_err_probe(dev, ret, "Failed to read chip ID\n"); + + if (chipid != SY7802_CHIP_ID) + return dev_err_probe(dev, -ENODEV, "Chip reported wrong ID: %x\n", chipid); + + return 0; +} + +static void sy7802_enable(struct sy7802 *chip) +{ + gpiod_set_value_cansleep(chip->enable_gpio, 1); + usleep_range(200, 300); +} + +static void sy7802_disable(struct sy7802 *chip) +{ + gpiod_set_value_cansleep(chip->enable_gpio, 0); +} + +static int sy7802_probe_dt(struct sy7802 *chip) +{ + struct device_node *np = dev_of_node(chip->dev), *child; + int i = 0; + int ret; + + regmap_write(chip->regmap, SY7802_REG_ENABLE, SY7802_MODE_OFF); + regmap_write(chip->regmap, SY7802_REG_TORCH_BRIGHTNESS, LED_OFF); + + for_each_available_child_of_node(np, child) { + struct sy7802_led *led = chip->leds + i; + + led->chip = chip; + led->led_no = i; + + ret = sy7802_init_flash_properties(chip->dev, led, child); + if (ret) { + of_node_put(child); + return ret; + } + + ret = sy7802_led_register(chip->dev, led, child); + if (ret) { + of_node_put(child); + return ret; + } + + i++; + } + return 0; +} + +static const struct regmap_config sy7802_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, + .cache_type = REGCACHE_MAPLE, + .reg_defaults = sy7802_regmap_defs, + .num_reg_defaults = ARRAY_SIZE(sy7802_regmap_defs), +}; + +static int sy7802_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct sy7802 *chip; + size_t count; + int ret; + + count = device_get_child_node_count(dev); + if (!count || count > SY7802_MAX_LEDS) + return dev_err_probe(dev, -EINVAL, + "No child node or node count over max led number %zu\n", count); + + chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->num_leds = count; + + chip->dev = dev; + i2c_set_clientdata(client, chip); + + chip->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); + ret = PTR_ERR_OR_ZERO(chip->enable_gpio); + if (ret) + return dev_err_probe(dev, ret, "Failed to request enable gpio\n"); + + chip->vin_regulator = devm_regulator_get(dev, "vin"); + ret = PTR_ERR_OR_ZERO(chip->vin_regulator); + if (ret) + return dev_err_probe(dev, ret, "Failed to request regulator\n"); + + ret = regulator_enable(chip->vin_regulator); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable regulator\n"); + + chip->regmap = devm_regmap_init_i2c(client, &sy7802_regmap_config); + if (IS_ERR(chip->regmap)) { + regulator_disable(chip->vin_regulator); + return dev_err_probe(dev, PTR_ERR(chip->regmap), + "Failed to allocate register map.\n"); + } + + ret = sy7802_probe_dt(chip); + if (ret < 0) { + regulator_disable(chip->vin_regulator); + return ret; + } + + sy7802_enable(chip); + + ret = sy7802_chip_check(chip); + if (ret) { + sy7802_disable(chip); + regulator_disable(chip->vin_regulator); + return ret; + } + + mutex_init(&chip->mutex); + + return ret; +} + +static void sy7802_remove(struct i2c_client *client) +{ + struct sy7802 *chip = i2c_get_clientdata(client); + + sy7802_disable(chip); + + mutex_destroy(&chip->mutex); + regulator_disable(chip->vin_regulator); +} + +static const struct of_device_id __maybe_unused sy7802_leds_match[] = { + { .compatible = "silergy,sy7802", }, + {} +}; + +MODULE_DEVICE_TABLE(of, sy7802_leds_match); + +static struct i2c_driver sy7802_driver = { + .driver = { + .name = "sy7802", + .of_match_table = of_match_ptr(sy7802_leds_match), + }, + .probe = sy7802_probe, + .remove = sy7802_remove, +}; + +module_i2c_driver(sy7802_driver); + +MODULE_AUTHOR("André Apitzsch <git@apitzsch.eu>"); +MODULE_DESCRIPTION("Silergy SY7802 flash LED driver"); +MODULE_LICENSE("GPL"); -- 2.44.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH 2/3] leds: sy7802: Add support for Silergy SY7802 flash LED controller @ 2024-03-27 22:51 ` André Apitzsch 0 siblings, 0 replies; 10+ messages in thread From: André Apitzsch @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch Add support for SY7802 flash LED controller. It can support up to 1.8A flash current. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- drivers/leds/flash/Kconfig | 11 + drivers/leds/flash/Makefile | 1 + drivers/leds/flash/leds-sy7802.c | 532 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 544 insertions(+) diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig index 809b6d98bb3e..f39f0bfe6eef 100644 --- a/drivers/leds/flash/Kconfig +++ b/drivers/leds/flash/Kconfig @@ -121,4 +121,15 @@ config LEDS_SGM3140 This option enables support for the SGM3140 500mA Buck/Boost Charge Pump LED Driver. +config LEDS_SY7802 + tristate "LED support for the Silergy SY7802" + depends on I2C && OF + depends on GPIOLIB + select REGMAP_I2C + help + This option enables support for the SY7802 flash LED controller. + SY7802 includes torch and flash functions with programmable current. + + This driver can be built as a module, it will be called "leds-sy7802". + endif # LEDS_CLASS_FLASH diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile index 91d60a4b7952..48860eeced79 100644 --- a/drivers/leds/flash/Makefile +++ b/drivers/leds/flash/Makefile @@ -11,3 +11,4 @@ obj-$(CONFIG_LEDS_QCOM_FLASH) += leds-qcom-flash.o obj-$(CONFIG_LEDS_RT4505) += leds-rt4505.o obj-$(CONFIG_LEDS_RT8515) += leds-rt8515.o obj-$(CONFIG_LEDS_SGM3140) += leds-sgm3140.o +obj-$(CONFIG_LEDS_SY7802) += leds-sy7802.o diff --git a/drivers/leds/flash/leds-sy7802.c b/drivers/leds/flash/leds-sy7802.c new file mode 100644 index 000000000000..c03a571b0e08 --- /dev/null +++ b/drivers/leds/flash/leds-sy7802.c @@ -0,0 +1,532 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Silergy SY7802 flash LED driver with I2C interface + * + * Copyright 2024 André Apitzsch <git@apitzsch.eu> + */ + +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/led-class-flash.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#define SY7802_MAX_LEDS 2 +#define SY7802_LED_JOINT 2 + +#define SY7802_REG_ENABLE 0x10 +#define SY7802_REG_TORCH_BRIGHTNESS 0xa0 +#define SY7802_REG_FLASH_BRIGHTNESS 0xb0 +#define SY7802_REG_FLASH_DURATION 0xc0 +#define SY7802_REG_FLAGS 0xd0 +#define SY7802_REG_CONFIG_1 0xe0 +#define SY7802_REG_CONFIG_2 0xf0 +#define SY7802_REG_VIN_MONITOR 0x80 +#define SY7802_REG_LAST_FLASH 0x81 +#define SY7802_REG_VLED_MONITOR 0x30 +#define SY7802_REG_ADC_DELAY 0x31 +#define SY7802_REG_DEV_ID 0xff + +#define SY7802_MODE_OFF 0 +#define SY7802_MODE_TORCH 2 +#define SY7802_MODE_FLASH 3 +#define SY7802_MODE_MASK GENMASK(1, 0) + +#define SY7802_LEDS_SHIFT 3 +#define SY7802_LEDS_MASK(_id) (BIT(_id) << SY7802_LEDS_SHIFT) +#define SY7802_LEDS_MASK_ALL (SY7802_LEDS_MASK(0) | SY7802_LEDS_MASK(1)) + +#define SY7802_TORCH_CURRENT_SHIFT 3 +#define SY7802_TORCH_CURRENT_MASK(_id) \ + (GENMASK(2, 0) << (SY7802_TORCH_CURRENT_SHIFT * (_id))) +#define SY7802_TORCH_CURRENT_MASK_ALL \ + (SY7802_TORCH_CURRENT_MASK(0) | SY7802_TORCH_CURRENT_MASK(1)) + +#define SY7802_FLASH_CURRENT_SHIFT 4 +#define SY7802_FLASH_CURRENT_MASK(_id) \ + (GENMASK(3, 0) << (SY7802_FLASH_CURRENT_SHIFT * (_id))) +#define SY7802_FLASH_CURRENT_MASK_ALL \ + (SY7802_FLASH_CURRENT_MASK(0) | SY7802_FLASH_CURRENT_MASK(1)) + +#define SY7802_TIMEOUT_DEFAULT_US 512000U +#define SY7802_TIMEOUT_MIN_US 32000U +#define SY7802_TIMEOUT_MAX_US 1024000U +#define SY7802_TIMEOUT_STEPSIZE_US 32000U + +#define SY7802_TORCH_BRIGHTNESS_MAX 8 + +#define SY7802_FLASH_BRIGHTNESS_DEFAULT 14 +#define SY7802_FLASH_BRIGHTNESS_MIN 0 +#define SY7802_FLASH_BRIGHTNESS_MAX 15 +#define SY7802_FLASH_BRIGHTNESS_STEP 1 + +#define SY7802_FLAG_TIMEOUT (1 << 0) +#define SY7802_FLAG_THERMAL_SHUTDOWN (1 << 1) +#define SY7802_FLAG_LED_FAULT (1 << 2) +#define SY7802_FLAG_TX1_INTERRUPT (1 << 3) +#define SY7802_FLAG_TX2_INTERRUPT (1 << 4) +#define SY7802_FLAG_LED_THERMAL_FAULT (1 << 5) +#define SY7802_FLAG_FLASH_INPUT_VOLTAGE_LOW (1 << 6) +#define SY7802_FLAG_INPUT_VOLTAGE_LOW (1 << 7) + +#define SY7802_CHIP_ID 0x51 + +static const struct reg_default sy7802_regmap_defs[] = { + { SY7802_REG_ENABLE, SY7802_LEDS_MASK_ALL }, + { SY7802_REG_TORCH_BRIGHTNESS, 0x92 }, + { SY7802_REG_FLASH_BRIGHTNESS, SY7802_FLASH_BRIGHTNESS_DEFAULT | + SY7802_FLASH_BRIGHTNESS_DEFAULT << SY7802_FLASH_CURRENT_SHIFT }, + { SY7802_REG_FLASH_DURATION, 0x6f }, + { SY7802_REG_FLAGS, 0x0 }, + { SY7802_REG_CONFIG_1, 0x68 }, + { SY7802_REG_CONFIG_2, 0xf0 }, +}; + +struct sy7802_led { + struct led_classdev_flash flash; + struct sy7802 *chip; + u8 led_no; +}; + +struct sy7802 { + struct mutex mutex; + struct device *dev; + struct regmap *regmap; + + struct gpio_desc *enable_gpio; + struct regulator *vin_regulator; + + unsigned int fled_strobe_used; + unsigned int fled_torch_used; + unsigned int leds_active; + int num_leds; + struct sy7802_led leds[] __counted_by(num_leds); +}; + +static int sy7802_torch_brightness_set(struct led_classdev *lcdev, enum led_brightness level) +{ + struct sy7802_led *led = container_of(lcdev, struct sy7802_led, flash.led_cdev); + u32 led_enable_mask = led->led_no == SY7802_LED_JOINT ? SY7802_LEDS_MASK_ALL : + SY7802_LEDS_MASK(led->led_no); + u32 enable_mask = SY7802_MODE_MASK | led_enable_mask; + u32 val = level ? led_enable_mask : SY7802_MODE_OFF; + struct sy7802 *chip = led->chip; + u32 curr; + u32 mask; + int ret; + + mutex_lock(&chip->mutex); + + /* + * There is only one set of flash control logic, and this flag is used to check if 'strobe' + * is currently being used. + */ + if (chip->fled_strobe_used) { + dev_warn(chip->dev, "Please disable strobe first [%d]\n", chip->fled_strobe_used); + ret = -EBUSY; + goto unlock; + } + + if (level) + curr = chip->fled_torch_used | BIT(led->led_no); + else + curr = chip->fled_torch_used & ~BIT(led->led_no); + + if (curr) + val |= SY7802_MODE_TORCH; + + /* Torch needs to be disabled first to apply new brightness */ + ret = regmap_update_bits(chip->regmap, SY7802_REG_ENABLE, SY7802_MODE_MASK, + SY7802_MODE_OFF); + if (ret) + goto unlock; + + mask = led->led_no == SY7802_LED_JOINT ? SY7802_TORCH_CURRENT_MASK_ALL : + SY7802_TORCH_CURRENT_MASK(led->led_no); + + /* Register expects brightness between 0 and MAX_BRIGHTNESS - 1 */ + if (level) + level -= 1; + + level |= (level << SY7802_TORCH_CURRENT_SHIFT); + + ret = regmap_update_bits(chip->regmap, SY7802_REG_TORCH_BRIGHTNESS, mask, level); + if (ret) + goto unlock; + + ret = regmap_update_bits(chip->regmap, SY7802_REG_ENABLE, enable_mask, val); + if (ret) + goto unlock; + + chip->fled_torch_used = curr; + +unlock: + mutex_unlock(&chip->mutex); + return ret; +} + +static int sy7802_flash_brightness_set(struct led_classdev_flash *fl_cdev, u32 brightness) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct led_flash_setting *s = &fl_cdev->brightness; + u32 val = (brightness - s->min) / s->step; + struct sy7802 *chip = led->chip; + u32 mask; + int ret; + + val |= (val << SY7802_FLASH_CURRENT_SHIFT); + mask = led->led_no == SY7802_LED_JOINT ? SY7802_FLASH_CURRENT_MASK_ALL : + SY7802_FLASH_CURRENT_MASK(led->led_no); + + mutex_lock(&chip->mutex); + ret = regmap_update_bits(chip->regmap, SY7802_REG_FLASH_BRIGHTNESS, mask, val); + mutex_unlock(&chip->mutex); + + return ret; +} + +static int sy7802_strobe_set(struct led_classdev_flash *fl_cdev, bool state) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + u32 led_enable_mask = led->led_no == SY7802_LED_JOINT ? SY7802_LEDS_MASK_ALL : + SY7802_LEDS_MASK(led->led_no); + u32 enable_mask = SY7802_MODE_MASK | led_enable_mask; + u32 val = state ? led_enable_mask : SY7802_MODE_OFF; + struct sy7802 *chip = led->chip; + u32 curr; + int ret; + + mutex_lock(&chip->mutex); + + /* + * There is only one set of flash control logic, and this flag is used to check if 'torch' + * is currently being used. + */ + if (chip->fled_torch_used) { + dev_warn(chip->dev, "Please disable torch first [0x%x]\n", chip->fled_torch_used); + ret = -EBUSY; + goto unlock; + } + + if (state) + curr = chip->fled_strobe_used | BIT(led->led_no); + else + curr = chip->fled_strobe_used & ~BIT(led->led_no); + + if (curr) + val |= SY7802_MODE_FLASH; + + ret = regmap_update_bits(chip->regmap, SY7802_REG_ENABLE, enable_mask, val); + + if (ret) + goto unlock; + + chip->fled_strobe_used = curr; + +unlock: + mutex_unlock(&chip->mutex); + return ret; +} + +static int sy7802_strobe_get(struct led_classdev_flash *fl_cdev, bool *state) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct sy7802 *chip = led->chip; + + mutex_lock(&chip->mutex); + *state = !!(chip->fled_strobe_used & BIT(led->led_no)); + mutex_unlock(&chip->mutex); + + return 0; +} + +static int sy7802_timeout_set(struct led_classdev_flash *fl_cdev, + u32 timeout) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct led_flash_setting *s = &fl_cdev->timeout; + u32 val = (timeout - s->min) / s->step; + struct sy7802 *chip = led->chip; + + return regmap_write(chip->regmap, SY7802_REG_FLASH_DURATION, val); +} + +static int sy7802_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault) +{ + struct sy7802_led *led = container_of(fl_cdev, struct sy7802_led, flash); + struct sy7802 *chip = led->chip; + u32 val, led_faults = 0; + int ret; + + /* NOTE: reading register clears fault status */ + ret = regmap_read(chip->regmap, SY7802_REG_FLAGS, &val); + if (ret) + return ret; + + if (val & (SY7802_FLAG_FLASH_INPUT_VOLTAGE_LOW | SY7802_FLAG_INPUT_VOLTAGE_LOW)) + led_faults |= LED_FAULT_INPUT_VOLTAGE; + + if (val & SY7802_FLAG_THERMAL_SHUTDOWN) + led_faults |= LED_FAULT_OVER_TEMPERATURE; + + if (val & SY7802_FLAG_TIMEOUT) + led_faults |= LED_FAULT_TIMEOUT; + + *fault = led_faults; + return 0; +} + +static const struct led_flash_ops sy7802_flash_ops = { + .flash_brightness_set = sy7802_flash_brightness_set, + .strobe_set = sy7802_strobe_set, + .strobe_get = sy7802_strobe_get, + .timeout_set = sy7802_timeout_set, + .fault_get = sy7802_fault_get, +}; + +static void sy7802_init_flash_brightness(struct led_classdev_flash *fl_cdev) +{ + struct led_flash_setting *s; + + /* Init flash brightness setting */ + s = &fl_cdev->brightness; + s->min = SY7802_FLASH_BRIGHTNESS_MIN; + s->max = SY7802_FLASH_BRIGHTNESS_MAX; + s->step = SY7802_FLASH_BRIGHTNESS_STEP; + s->val = SY7802_FLASH_BRIGHTNESS_DEFAULT; +} + +static void sy7802_init_flash_timeout(struct led_classdev_flash *fl_cdev) +{ + struct led_flash_setting *s; + + /* Init flash timeout setting */ + s = &fl_cdev->timeout; + s->min = SY7802_TIMEOUT_MIN_US; + s->max = SY7802_TIMEOUT_MAX_US; + s->step = SY7802_TIMEOUT_STEPSIZE_US; + s->val = SY7802_TIMEOUT_DEFAULT_US; +} + +static int sy7802_led_register(struct device *dev, struct sy7802_led *led, + struct device_node *np) +{ + struct led_init_data init_data = {}; + int ret; + + init_data.fwnode = of_fwnode_handle(np); + + ret = devm_led_classdev_flash_register_ext(dev, &led->flash, &init_data); + if (ret) { + dev_err(dev, "Couldn't register flash %d\n", led->led_no); + return ret; + } + + return ret; +} + +static int sy7802_init_flash_properties(struct device *dev, struct sy7802_led *led, + struct device_node *np) +{ + struct led_classdev_flash *flash = &led->flash; + struct led_classdev *lcdev = &flash->led_cdev; + u32 sources[SY7802_MAX_LEDS]; + int i, num, ret; + + num = of_property_count_u32_elems(np, "led-sources"); + if (num < 1) { + dev_err(dev, "Not specified or wrong number of led-sources\n"); + return -EINVAL; + } + + ret = of_property_read_u32_array(np, "led-sources", sources, num); + if (ret) + return ret; + + for (i = 0; i < num; i++) { + if (sources[i] >= SY7802_MAX_LEDS) + return -EINVAL; + if (led->chip->leds_active & BIT(sources[i])) + return -EINVAL; + led->chip->leds_active |= BIT(sources[i]); + } + + /* If both channels are specified in 'led-sources', joint flash output mode is used */ + led->led_no = num == 2 ? SY7802_LED_JOINT : sources[0]; + + lcdev->max_brightness = SY7802_TORCH_BRIGHTNESS_MAX; + lcdev->brightness_set_blocking = sy7802_torch_brightness_set; + lcdev->flags |= LED_DEV_CAP_FLASH; + + flash->ops = &sy7802_flash_ops; + + sy7802_init_flash_brightness(flash); + sy7802_init_flash_timeout(flash); + + return 0; +} + +static int sy7802_chip_check(struct sy7802 *chip) +{ + struct device *dev = chip->dev; + u32 chipid; + int ret; + + ret = regmap_read(chip->regmap, SY7802_REG_DEV_ID, &chipid); + if (ret) + return dev_err_probe(dev, ret, "Failed to read chip ID\n"); + + if (chipid != SY7802_CHIP_ID) + return dev_err_probe(dev, -ENODEV, "Chip reported wrong ID: %x\n", chipid); + + return 0; +} + +static void sy7802_enable(struct sy7802 *chip) +{ + gpiod_set_value_cansleep(chip->enable_gpio, 1); + usleep_range(200, 300); +} + +static void sy7802_disable(struct sy7802 *chip) +{ + gpiod_set_value_cansleep(chip->enable_gpio, 0); +} + +static int sy7802_probe_dt(struct sy7802 *chip) +{ + struct device_node *np = dev_of_node(chip->dev), *child; + int i = 0; + int ret; + + regmap_write(chip->regmap, SY7802_REG_ENABLE, SY7802_MODE_OFF); + regmap_write(chip->regmap, SY7802_REG_TORCH_BRIGHTNESS, LED_OFF); + + for_each_available_child_of_node(np, child) { + struct sy7802_led *led = chip->leds + i; + + led->chip = chip; + led->led_no = i; + + ret = sy7802_init_flash_properties(chip->dev, led, child); + if (ret) { + of_node_put(child); + return ret; + } + + ret = sy7802_led_register(chip->dev, led, child); + if (ret) { + of_node_put(child); + return ret; + } + + i++; + } + return 0; +} + +static const struct regmap_config sy7802_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, + .cache_type = REGCACHE_MAPLE, + .reg_defaults = sy7802_regmap_defs, + .num_reg_defaults = ARRAY_SIZE(sy7802_regmap_defs), +}; + +static int sy7802_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct sy7802 *chip; + size_t count; + int ret; + + count = device_get_child_node_count(dev); + if (!count || count > SY7802_MAX_LEDS) + return dev_err_probe(dev, -EINVAL, + "No child node or node count over max led number %zu\n", count); + + chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->num_leds = count; + + chip->dev = dev; + i2c_set_clientdata(client, chip); + + chip->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); + ret = PTR_ERR_OR_ZERO(chip->enable_gpio); + if (ret) + return dev_err_probe(dev, ret, "Failed to request enable gpio\n"); + + chip->vin_regulator = devm_regulator_get(dev, "vin"); + ret = PTR_ERR_OR_ZERO(chip->vin_regulator); + if (ret) + return dev_err_probe(dev, ret, "Failed to request regulator\n"); + + ret = regulator_enable(chip->vin_regulator); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable regulator\n"); + + chip->regmap = devm_regmap_init_i2c(client, &sy7802_regmap_config); + if (IS_ERR(chip->regmap)) { + regulator_disable(chip->vin_regulator); + return dev_err_probe(dev, PTR_ERR(chip->regmap), + "Failed to allocate register map.\n"); + } + + ret = sy7802_probe_dt(chip); + if (ret < 0) { + regulator_disable(chip->vin_regulator); + return ret; + } + + sy7802_enable(chip); + + ret = sy7802_chip_check(chip); + if (ret) { + sy7802_disable(chip); + regulator_disable(chip->vin_regulator); + return ret; + } + + mutex_init(&chip->mutex); + + return ret; +} + +static void sy7802_remove(struct i2c_client *client) +{ + struct sy7802 *chip = i2c_get_clientdata(client); + + sy7802_disable(chip); + + mutex_destroy(&chip->mutex); + regulator_disable(chip->vin_regulator); +} + +static const struct of_device_id __maybe_unused sy7802_leds_match[] = { + { .compatible = "silergy,sy7802", }, + {} +}; + +MODULE_DEVICE_TABLE(of, sy7802_leds_match); + +static struct i2c_driver sy7802_driver = { + .driver = { + .name = "sy7802", + .of_match_table = of_match_ptr(sy7802_leds_match), + }, + .probe = sy7802_probe, + .remove = sy7802_remove, +}; + +module_i2c_driver(sy7802_driver); + +MODULE_AUTHOR("André Apitzsch <git@apitzsch.eu>"); +MODULE_DESCRIPTION("Silergy SY7802 flash LED driver"); +MODULE_LICENSE("GPL"); -- 2.44.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH 3/3] arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash 2024-03-27 22:51 ` André Apitzsch @ 2024-03-27 22:51 ` André Apitzsch -1 siblings, 0 replies; 10+ messages in thread From: André Apitzsch via B4 Relay @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch From: André Apitzsch <git@apitzsch.eu> The phone has a Silergy SY7802 flash LED controller. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- .../boot/dts/qcom/msm8939-longcheer-l9100.dts | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts b/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts index e3404c4455cf..528737929274 100644 --- a/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts +++ b/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts @@ -159,6 +159,25 @@ led@2 { }; }; }; + + flash-led-controller@53 { + compatible = "silergy,sy7802"; + reg = <0x53>; + #address-cells = <1>; + #size-cells = <0>; + + enable-gpios = <&tlmm 16 GPIO_ACTIVE_HIGH>; + + pinctrl-0 = <&camera_rear_flash_default>; + pinctrl-names = "default"; + + led@0 { + reg = <0>; + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_WHITE>; + led-sources = <0>, <1>; + }; + }; }; &blsp_i2c3 { @@ -318,6 +337,13 @@ camera_front_flash_default: camera-front-flash-default-state { bias-disable; }; + camera_rear_flash_default: camera-rear-flash-default-state { + pins = "gpio9", "gpio16", "gpio51"; + function = "gpio"; + drive-strength = <2>; + bias-disable; + }; + gpio_hall_sensor_default: gpio-hall-sensor-default-state { pins = "gpio20"; function = "gpio"; -- 2.44.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH 3/3] arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash @ 2024-03-27 22:51 ` André Apitzsch 0 siblings, 0 replies; 10+ messages in thread From: André Apitzsch @ 2024-03-27 22:51 UTC (permalink / raw) To: Pavel Machek, Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Kees Cook, Gustavo A. R. Silva, Bjorn Andersson, Konrad Dybcio Cc: linux-leds, devicetree, linux-kernel, linux-hardening, linux-arm-msm, ~postmarketos/upstreaming, André Apitzsch The phone has a Silergy SY7802 flash LED controller. Signed-off-by: André Apitzsch <git@apitzsch.eu> --- .../boot/dts/qcom/msm8939-longcheer-l9100.dts | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts b/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts index e3404c4455cf..528737929274 100644 --- a/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts +++ b/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts @@ -159,6 +159,25 @@ led@2 { }; }; }; + + flash-led-controller@53 { + compatible = "silergy,sy7802"; + reg = <0x53>; + #address-cells = <1>; + #size-cells = <0>; + + enable-gpios = <&tlmm 16 GPIO_ACTIVE_HIGH>; + + pinctrl-0 = <&camera_rear_flash_default>; + pinctrl-names = "default"; + + led@0 { + reg = <0>; + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_WHITE>; + led-sources = <0>, <1>; + }; + }; }; &blsp_i2c3 { @@ -318,6 +337,13 @@ camera_front_flash_default: camera-front-flash-default-state { bias-disable; }; + camera_rear_flash_default: camera-rear-flash-default-state { + pins = "gpio9", "gpio16", "gpio51"; + function = "gpio"; + drive-strength = <2>; + bias-disable; + }; + gpio_hall_sensor_default: gpio-hall-sensor-default-state { pins = "gpio20"; function = "gpio"; -- 2.44.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
end of thread, other threads:[~2024-03-28 18:50 UTC | newest] Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-03-27 22:51 [PATCH 0/3] Add sy7802 flash led driver André Apitzsch via B4 Relay 2024-03-27 22:51 ` André Apitzsch 2024-03-27 22:51 ` [PATCH 1/3] dt-bindings: leds: Add Silergy SY7802 flash LED André Apitzsch via B4 Relay 2024-03-27 22:51 ` André Apitzsch 2024-03-28 0:44 ` Rob Herring 2024-03-28 18:50 ` Rob Herring 2024-03-27 22:51 ` [PATCH 2/3] leds: sy7802: Add support for Silergy SY7802 flash LED controller André Apitzsch via B4 Relay 2024-03-27 22:51 ` André Apitzsch 2024-03-27 22:51 ` [PATCH 3/3] arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash André Apitzsch via B4 Relay 2024-03-27 22:51 ` André Apitzsch
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