Hi!
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index ed943140e1fd..6445b39fe4fc 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -886,6 +886,16 @@ config LEDS_SGM3140
> This option enables support for the SGM3140 500mA Buck/Boost Charge
> Pump LED Driver.
>
> +config LEDS_LGM_SSO
> + tristate "LED support for Intel LGM SOC series"
> + depends on LEDS_CLASS
> + depends on MFD_SYSCON
> + depends on OF
> + help
> + Parallel to serial conversion, which is also called SSO controller,
> + can drive external shift register for LED outputs.
> + This enables LED support for Serial Shift Output Controller(SSO).
Something is wrong with indentation here.
> diff --git a/drivers/leds/leds-lgm-sso.c b/drivers/leds/leds-lgm-sso.c
Could we put it into drivers/leds/blink/ directory? You'll need to
create it.
> index 000000000000..f1bae1c6ed3c
> --- /dev/null
> +++ b/drivers/leds/leds-lgm-sso.c
> @@ -0,0 +1,881 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Intel LGM Soc LED SSO driver
Spell out LGM, SSO. Soc->SoC.
Pointer to documentation would be welcome here.
> +enum {
> + US_SW = 0,
> + US_GPTC = 1,
> + US_FPID = 2
> +};
This is not really useful without additional comments.
> +static u32 sso_rectify_brightness(u32 brightness)
> +{
> + if (brightness > LED_FULL)
> + return LED_FULL;
> + else
> + return brightness;
> +}
Why?
> +static int sso_rectify_blink_rate(struct sso_led_priv *priv, u32 rate)
> +{
> + int i;
> +
> + for (i = 0; i < MAX_FREQ_RANK; i++) {
> + if (rate <= priv->freq[i])
> + return i;
> + }
> +
> + return i - 1;
> +}
Can return -1. Is that expected?
> +
> + desc->np = to_of_node(fwnode_child);
> + if (fwnode_property_read_string(fwnode_child, "label",
> + &desc->name)) {
> + dev_err(dev, "LED no label name!\n");
> + goto __dt_err;
> + }
Can you use appropriate helper from the core? labels are getting
deprecated...
> + if (fwnode_property_present(fwnode_child,
> + "retain-state-suspended"))
> + desc->retain_state_suspended = 1;
Was this documented in the binding?
> + if (fwnode_property_read_u32(fwnode_child, "intel,led-pin",
> + &prop)) {
> + dev_err(dev, "Failed to find led pin id!\n");
> + goto __dt_err;
Would not we normally use something like reg = <x> to indicate pin?
> + if (fwnode_property_present(fwnode_child,
> + "intel,sso-hw-trigger"))
> + desc->hw_trig = 1;
Should not that be selectable on runtime?
> + if (fwnode_property_read_u32(fwnode_child,
> + "intel,sso-brightness", &prop))
> + desc->brightness = priv->brightness;
> + else
> + desc->brightness = sso_rectify_brightness(prop);
Can you look at "default-state" property?
> + ret = sso_gpio_gc_init(dev, priv);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
Just return ret.
> +
> + ret = clk_prepare_enable(priv->gclk);
> + if (ret) {
> + dev_err(dev, "Failed to prepate/enable sso gate clock!\n");
> + return ret;
> + }
> +
> + priv->fpid_clk = devm_clk_get(dev, "fpid");
> + if (IS_ERR(priv->fpid_clk)) {
> + dev_err(dev, "Failed to get fpid clock!\n");
> + return PTR_ERR(priv->fpid_clk);
> + }
clk disable here?
> + ret = clk_prepare_enable(priv->fpid_clk);
> + if (ret) {
> + dev_err(dev, "Failed to prepare/enable fpid clock!\n");
> + return ret;
> + }
> + priv->fpid_clkrate = clk_get_rate(priv->fpid_clk);
> +
> + priv->mmap = syscon_node_to_regmap(dev->of_node);
> + if (IS_ERR(priv->mmap)) {
> + dev_err(dev, "Failed to map iomem!\n");
> + return PTR_ERR(priv->mmap);
> + }
clk disable here? ... and probably elsewhere?
Best regards,
Pavel
--
http://www.livejournal.com/~pavelmachek
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