Re: [PATCH v8 1/2] leds: flash: add driver to support flash LED module in QCOM PMICs

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On 3/26/2023 1:09 AM, Pavel Machek wrote:
Hi!
@@ -61,6 +61,21 @@ config LEDS_MT6360
  	  Independent current sources supply for each flash LED support torch
  	  and strobe mode.
+config LEDS_QCOM_FLASH
+	tristate "LED support for flash module inside Qualcomm Technologies, Inc. PMIC"
+	depends on MFD_SPMI_PMIC || COMPILE_TEST
+	depends on LEDS_CLASS && OF
+	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+	select REGMAP
+	help
+	  This option enables support for the flash module found in Qualcomm
+	  Technologies, Inc. PMICs. The flash module can have 3 or 4 flash LED
+	  channels and each channel is programmable to support up to 1.5 A full
+	  scale current. It also supports connecting two channels' output together
+	  to supply one LED component to achieve current up to 2 A. In such case,
+	  the total LED current will be split symmetrically on each channel and
+	  they will be enabled/disabled at the same time.

"This can be built as a module, module will be called..."

I can update it in a new change considering the initial change has been applied.


+static int qcom_flash_led_brightness_set(struct led_classdev *led_cdev,
+					enum led_brightness brightness)
+{
+	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+	u32 current_ma = brightness * led->max_torch_current_ma / LED_FULL;
+	bool enable = !!brightness;
+	int rc;
+
+	rc = set_flash_current(led, current_ma, TORCH_MODE);
+	if (rc)
+		return rc;

I'd not mind supporting more than one brightness level -- AFAICT hw can do that.

It does support multiple levels and the 'current_ma' is calculated based on different brightness level.


BR,
									Pavel



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