linux-kernel - [PATCH RESEND v6] arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash

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Message-Id: <20240729-sy7802-v6-1-86bb9083e40b@apitzsch.eu>
Date: Mon, 29 Jul 2024 23:23:04 +0200
From: André Apitzsch via B4 Relay <devnull+git.apitzsch.eu@...nel.org>
To: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>, 
 Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
 "Gustavo A. R. Silva" <gustavoars@...nel.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Christophe JAILLET <christophe.jaillet@...adoo.fr>, 
 Trilok Soni <quic_tsoni@...cinc.com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Kees Cook <kees@...nel.org>
Cc: linux-leds@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 phone-devel@...r.kernel.org, 
 André Apitzsch <git@...tzsch.eu>
Subject: [PATCH RESEND v6] arm64: dts: qcom: msm8939-longcheer-l9100: Add
 rear flash

From: André Apitzsch <git@...tzsch.eu>

The phone has a Silergy SY7802 flash LED controller.

Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Signed-off-by: André Apitzsch <git@...tzsch.eu>
---
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.
---
Changes in v6:
- Drop applied patches 1/3 and 2/3
- Move #address-/size-cells to the end
- Add R-b tag
- Link to v5: https://lore.kernel.org/r/20240624-sy7802-v5-0-7abc9d96bfa6@apitzsch.eu

Changes in v5:
- Fix language in driver description comment
- Unwrap function arguments
- Remove unnecessary empty lines
- Add Acked-by tag to second patch
- Link to v4: https://lore.kernel.org/r/20240616-sy7802-v4-0-789994180e05@apitzsch.eu

Changes in v4:
- Use for_each_available_child_of_node_scoped() to simplify code
- Use dev_err_probe() to be consistent with the other code in
  sy7802_probe()
- Split devm_add_action() into 2 devm_add_action_or_reset() to simplify
  code and balance regulator_enable()
- Link to v3: https://lore.kernel.org/r/20240612-sy7802-v3-0-1e9cc1c79b79@apitzsch.eu

Changes in v3:
- Add R-b tag to first patch
- Extend driver commit message
- Improve readability of defines by using BIT()
- Rename some variables/parameters
  * led_no -> led_id
  * level -> brightness
  * curr -> fled_{strobe,torch}_used_tmp
  * mask -> {flash,torch}_mask
  * i -> child_num
- Restructure structs ("Place th big stuff at the top")
- Declare 'child' on a separate line
- Move multi-line assignments out of declaration block
- Update warning/error messages and comments
- Use gotos to handle error path
- Use devm API to cleanup module's resources
- Init mutex before LED class device is registered to avoid race
  condition
- Link to v2: https://lore.kernel.org/r/20240401-sy7802-v2-0-1138190a7448@apitzsch.eu

Changes in v2:
- bindings: remove unneeded allOf
- bindings: example: move flash-led-controller under i2c node to fix
  check error
- Cc to phone-devel
- Link to v1: https://lore.kernel.org/r/20240327-sy7802-v1-0-db74ab32faaf@apitzsch.eu
---
 .../boot/dts/qcom/msm8939-longcheer-l9100.dts      | 27 ++++++++++++++++++++++
 1 file changed, 27 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..b845da4fa23e 100644
--- a/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts
+++ b/arch/arm64/boot/dts/qcom/msm8939-longcheer-l9100.dts
@@ -159,6 +159,26 @@ led@2 {
 			};
 		};
 	};
+
+	flash-led-controller@53 {
+		compatible = "silergy,sy7802";
+		reg = <0x53>;
+
+		enable-gpios = <&tlmm 16 GPIO_ACTIVE_HIGH>;
+
+		pinctrl-0 = <&camera_rear_flash_default>;
+		pinctrl-names = "default";
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		led@0 {
+			reg = <0>;
+			function = LED_FUNCTION_FLASH;
+			color = <LED_COLOR_ID_WHITE>;
+			led-sources = <0>, <1>;
+		};
+	};
 };
 
 &blsp_i2c3 {
@@ -318,6 +338,13 @@ 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";

---
base-commit: 0b58e108042b0ed28a71cd7edf5175999955b233
change-id: 20240325-sy7802-f40fc6f56525

Best regards,
-- 
André Apitzsch <git@...tzsch.eu>