| Message ID | 20210126140240.1517044-1-nfraprado@protonmail.com |
|---|---|
| Headers | show |
| Series | Add support for QCOM SPMI Flash LEDs | expand |
On Tue 26 Jan 08:06 CST 2021, N?colas F. R. A. Prado wrote: > Enable module for the Qualcomm SPMI Flash LEDs present on the PM8941 > PMIC. > > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@protonmail.com> > --- > Changes in v2: > - Enabled CONFIG_LEDS_CLASS_FLASH since the driver now depends on it. > > arch/arm/configs/qcom_defconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm/configs/qcom_defconfig b/arch/arm/configs/qcom_defconfig > index f6e9675f639c..05cacc59087e 100644 > --- a/arch/arm/configs/qcom_defconfig > +++ b/arch/arm/configs/qcom_defconfig > @@ -202,6 +202,7 @@ CONFIG_MMC_SDHCI_PLTFM=y > CONFIG_MMC_SDHCI_MSM=y > CONFIG_NEW_LEDS=y > CONFIG_LEDS_CLASS=y > +CONFIG_LEDS_CLASS_FLASH=y This doesn't seem critical to boot the system, can we make it =m? Regards, Bjorn > CONFIG_LEDS_GPIO=y > CONFIG_LEDS_PM8058=y > CONFIG_LEDS_TRIGGERS=y > @@ -284,3 +285,4 @@ CONFIG_DYNAMIC_DEBUG=y > CONFIG_DEBUG_INFO=y > CONFIG_MAGIC_SYSRQ=y > # CONFIG_SCHED_DEBUG is not set > +CONFIG_LEDS_QCOM_SPMI_FLASH=m > -- > 2.30.0 > >
Hi Nicolas, On 1/26/21 3:04 PM, Nícolas F. R. A. Prado wrote: > Add devicetree binding for QCOM SPMI Flash LEDs, which are part of > PM8941, and are used both as lantern and camera flash. > > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@protonmail.com> > --- > Changes in v2: > - Add this commit > > .../bindings/leds/leds-qcom-spmi-flash.yaml | 94 +++++++++++++++++++ > .../dt-bindings/leds/leds-qcom-spmi-flash.h | 15 +++ > 2 files changed, 109 insertions(+) > create mode 100644 Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml > create mode 100644 include/dt-bindings/leds/leds-qcom-spmi-flash.h > > diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml > new file mode 100644 > index 000000000000..169716e14f67 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml > @@ -0,0 +1,94 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/leds/leds-qcom-spmi-flash.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm SPMI Flash LEDs > + > +maintainers: > + - Nícolas F. R. A. Prado <nfraprado@protonmail.com> > + > +description: | > + The Qualcomm SPMI Flash LEDs are part of Qualcomm PMICs and are used primarily > + as a camera or video flash. They can also be used as a lantern when on torch > + mode. > + The PMIC is connected to Host processor via SPMI bus. > + > +properties: > + compatible: > + const: qcom,spmi-flash > + > + reg: > + maxItems: 1 > + > + flash-boost-supply: > + description: SMBB regulator for LED flash mode > + > + torch-boost-supply: > + description: SMBB regulator for LED torch mode > + > +patternProperties: > + "^led[0-1]$": > + type: object > + $ref: common.yaml# > + > + properties: > + qcom,clamp-curr: > + description: current to clamp at, in uA You're already using led-max-microamp and flash-max-microamp, so I'm not sure how this is related to those. > + $ref: /schemas/types.yaml#definitions/uint32 > + > + qcom,headroom: > + description: | > + headroom to use. Use one of QCOM_SPMI_FLASH_HEADROOM_* defined in > + include/dt-bindings/leds/leds-qcom-spmi-flash.h More information would be welcome here on how it impacts device operation. > + $ref: /schemas/types.yaml#definitions/uint32 > + minimum: 0 > + maximum: 3 > + > + qcom,startup-dly: > + description: | > + delay before flashing. Use one of QCOM_SPMI_FLASH_STARTUP_DLY_* > + defined in include/dt-bindings/leds/leds-qcom-spmi-flash.h I don't see much gain in having this exposed. We don't have related constructs in the API to handle that, so I propose to always set it to 0 and not expose this setting at all. > + $ref: /schemas/types.yaml#definitions/uint32 > + minimum: 0 > + maximum: 3 > + > + qcom,safety-timer: > + description: include for safety timer use, otherwise watchdog timer will be used > + type: boolean What's the difference between watchdog timer and safety timer? Either way, I propose to choose the option best fitting for handling flash timeout setting and hide this inside the driver. > +required: > + - compatible > + - reg > + - flash-boost-supply > + - torch-boost-supply > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/leds/common.h> > + #include <dt-bindings/leds/leds-qcom-spmi-flash.h> > + > + qcom,leds@d300 { > + compatible = "qcom,spmi-flash"; > + reg = <0xd300 0x100>; > + flash-boost-supply = <&pm8941_5vs1>; > + torch-boost-supply = <&pm8941_5v>; > + > + led0 { > + led-sources = <0>; Please use reg property for this purpose instead. > + function = LED_FUNCTION_FLASH; > + color = <LED_COLOR_ID_WHITE>; > + led-max-microamp = <200000>; > + flash-max-microamp = <1000000>; > + flash-max-timeout-us = <1280000>; You should mention this properties above and provide constraints (min, max, step). > + default-state = "off"; There's no point in having this in the example. > + qcom,clamp-curr = <200000>; > + qcom,headroom = <QCOM_SPMI_FLASH_HEADROOM_500MV>; > + qcom,startup-dly = <QCOM_SPMI_FLASH_STARTUP_DLY_128US>; > + qcom,safety-timer; > + }; > + }; > +... > diff --git a/include/dt-bindings/leds/leds-qcom-spmi-flash.h b/include/dt-bindings/leds/leds-qcom-spmi-flash.h > new file mode 100644 > index 000000000000..8bd54a8e831d > --- /dev/null > +++ b/include/dt-bindings/leds/leds-qcom-spmi-flash.h > @@ -0,0 +1,15 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#ifndef _DT_BINDINGS_LEDS_QCOM_SPMI_FLASH_H > +#define _DT_BINDINGS_LEDS_QCOM_SPMI_FLASH_H > + > +#define QCOM_SPMI_FLASH_HEADROOM_250MV 0 > +#define QCOM_SPMI_FLASH_HEADROOM_300MV 1 > +#define QCOM_SPMI_FLASH_HEADROOM_400MV 2 > +#define QCOM_SPMI_FLASH_HEADROOM_500MV 3 > + > +#define QCOM_SPMI_FLASH_STARTUP_DLY_10US 0 > +#define QCOM_SPMI_FLASH_STARTUP_DLY_32US 1 > +#define QCOM_SPMI_FLASH_STARTUP_DLY_64US 2 > +#define QCOM_SPMI_FLASH_STARTUP_DLY_128US 3 > + > +#endif >