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

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Date:   Sat, 25 Mar 2023 18:36:40 +0100
From:   Pavel Machek <pavel@....cz>
To:     Fenglin Wu <quic_fenglinw@...cinc.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        lee@...nel.org, krzysztof.kozlowski@...aro.org,
        linux-leds@...r.kernel.org, quic_collinsd@...cinc.com,
        quic_subbaram@...cinc.com, Luca Weiss <luca.weiss@...rphone.com>
Subject: Re: [PATCH v8 1/2] leds: flash: add driver to support flash LED
 module in QCOM PMICs

On Fri 2023-03-03 17:50:22, Fenglin Wu wrote:
> Add initial driver to support flash LED module found in Qualcomm
> Technologies, Inc. PMICs. The flash module can have 3 or 4 channels
> and each channel can be controlled indepedently and support full scale
> current up to 1.5 A. It also supports connecting two channels together
> to supply one LED component with full scale current up to 2 A. In that
> case, the current will be split on each channel symmetrically and the
> channels will be enabled and disabled at the same time.
> 
> Signed-off-by: Fenglin Wu <quic_fenglinw@...cinc.com>
> Tested-by: Luca Weiss <luca.weiss@...rphone.com> # sm7225-fairphone-fp4 + pm6150l

> +	flash->led_cdev.brightness_set_blocking = qcom_flash_led_brightness_set;
> +
> +	init_data.fwnode = node;
> +	init_data.devicename = NULL;
> +	init_data.default_label = NULL;
> +	init_data.devname_mandatory = false;
> +
> +	rc = devm_led_classdev_flash_register_ext(dev, flash, &init_data);
> +	if (rc < 0) {
> +		dev_err(dev, "Register flash LED classdev failed, rc=%d\n", rc);
> +		return rc;
> +	}

I'd expect setting max_brightness somewhere around here.

What does cat /sys/class/leds/*/max_brightness say (and what directory
name are you using)?

BR,								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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