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
