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Message-ID: <fe0bb552-52d8-4ae1-a20b-c7236cf1f255@redhat.com>
Date: Mon, 29 Apr 2024 13:05:23 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: Kate Hsuan <hpa@...hat.com>, Pavel Machek <pavel@....cz>,
Lee Jones <lee@...nel.org>, linux-leds@...r.kernel.org,
platform-driver-x86@...r.kernel.org,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
André Apitzsch <git@...tzsch.eu>,
linux-kernel@...r.kernel.org, Andy Shevchenko <andy.shevchenko@...il.com>,
Sebastian Reichel <sre@...nel.org>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v7 1/6] leds: rgb: leds-ktd202x: Get device properties
through fwnode to support ACPI
Hi,
On 4/24/24 8:52 AM, Kate Hsuan wrote:
> This LED controller is installed on a Xiaomi pad2 and it is an x86
> platform. The original driver is based on the device tree and can't be
> used for this ACPI based system. This patch migrated the driver to use
> fwnode to access the properties. Moreover, the fwnode API supports the
> device tree so this work won't affect the original implementations.
>
> Signed-off-by: Kate Hsuan <hpa@...hat.com>
> Tested-by: André Apitzsch <git@...tzsch.eu> # on BQ Aquaris M5
Thanks, patch looks good to me:
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Regards,
Hans
> ---
> drivers/leds/rgb/Kconfig | 1 -
> drivers/leds/rgb/leds-ktd202x.c | 64 +++++++++++++++++----------------
> 2 files changed, 34 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig
> index e66bd21b9852..14d6b294a786 100644
> --- a/drivers/leds/rgb/Kconfig
> +++ b/drivers/leds/rgb/Kconfig
> @@ -17,7 +17,6 @@ config LEDS_GROUP_MULTICOLOR
> config LEDS_KTD202X
> tristate "LED support for KTD202x Chips"
> depends on I2C
> - depends on OF
> select REGMAP_I2C
> help
> This option enables support for the Kinetic KTD2026/KTD2027
> diff --git a/drivers/leds/rgb/leds-ktd202x.c b/drivers/leds/rgb/leds-ktd202x.c
> index 514965795a10..f1c810c415a4 100644
> --- a/drivers/leds/rgb/leds-ktd202x.c
> +++ b/drivers/leds/rgb/leds-ktd202x.c
> @@ -99,7 +99,7 @@ struct ktd202x {
> struct device *dev;
> struct regmap *regmap;
> bool enabled;
> - int num_leds;
> + unsigned long num_leds;
> struct ktd202x_led leds[] __counted_by(num_leds);
> };
>
> @@ -381,16 +381,19 @@ static int ktd202x_blink_mc_set(struct led_classdev *cdev,
> mc->num_colors);
> }
>
> -static int ktd202x_setup_led_rgb(struct ktd202x *chip, struct device_node *np,
> +static int ktd202x_setup_led_rgb(struct ktd202x *chip, struct fwnode_handle *fwnode,
> struct ktd202x_led *led, struct led_init_data *init_data)
> {
> + struct fwnode_handle *child;
> struct led_classdev *cdev;
> - struct device_node *child;
> struct mc_subled *info;
> int num_channels;
> int i = 0;
>
> - num_channels = of_get_available_child_count(np);
> + num_channels = 0;
> + fwnode_for_each_available_child_node(fwnode, child)
> + num_channels++;
> +
> if (!num_channels || num_channels > chip->num_leds)
> return -EINVAL;
>
> @@ -398,22 +401,22 @@ static int ktd202x_setup_led_rgb(struct ktd202x *chip, struct device_node *np,
> if (!info)
> return -ENOMEM;
>
> - for_each_available_child_of_node(np, child) {
> + fwnode_for_each_available_child_node(fwnode, child) {
> u32 mono_color;
> u32 reg;
> int ret;
>
> - ret = of_property_read_u32(child, "reg", ®);
> + ret = fwnode_property_read_u32(child, "reg", ®);
> if (ret != 0 || reg >= chip->num_leds) {
> - dev_err(chip->dev, "invalid 'reg' of %pOFn\n", child);
> - of_node_put(child);
> - return -EINVAL;
> + dev_err(chip->dev, "invalid 'reg' of %pfw\n", child);
> + fwnode_handle_put(child);
> + return ret;
> }
>
> - ret = of_property_read_u32(child, "color", &mono_color);
> + ret = fwnode_property_read_u32(child, "color", &mono_color);
> if (ret < 0 && ret != -EINVAL) {
> - dev_err(chip->dev, "failed to parse 'color' of %pOF\n", child);
> - of_node_put(child);
> + dev_err(chip->dev, "failed to parse 'color' of %pfw\n", child);
> + fwnode_handle_put(child);
> return ret;
> }
>
> @@ -433,16 +436,16 @@ static int ktd202x_setup_led_rgb(struct ktd202x *chip, struct device_node *np,
> return devm_led_classdev_multicolor_register_ext(chip->dev, &led->mcdev, init_data);
> }
>
> -static int ktd202x_setup_led_single(struct ktd202x *chip, struct device_node *np,
> +static int ktd202x_setup_led_single(struct ktd202x *chip, struct fwnode_handle *fwnode,
> struct ktd202x_led *led, struct led_init_data *init_data)
> {
> struct led_classdev *cdev;
> u32 reg;
> int ret;
>
> - ret = of_property_read_u32(np, "reg", ®);
> + ret = fwnode_property_read_u32(fwnode, "reg", ®);
> if (ret != 0 || reg >= chip->num_leds) {
> - dev_err(chip->dev, "invalid 'reg' of %pOFn\n", np);
> + dev_err(chip->dev, "invalid 'reg' of %pfw\n", fwnode);
> return -EINVAL;
> }
> led->index = reg;
> @@ -454,7 +457,7 @@ static int ktd202x_setup_led_single(struct ktd202x *chip, struct device_node *np
> return devm_led_classdev_register_ext(chip->dev, &led->cdev, init_data);
> }
>
> -static int ktd202x_add_led(struct ktd202x *chip, struct device_node *np, unsigned int index)
> +static int ktd202x_add_led(struct ktd202x *chip, struct fwnode_handle *fwnode, unsigned int index)
> {
> struct ktd202x_led *led = &chip->leds[index];
> struct led_init_data init_data = {};
> @@ -463,21 +466,21 @@ static int ktd202x_add_led(struct ktd202x *chip, struct device_node *np, unsigne
> int ret;
>
> /* Color property is optional in single color case */
> - ret = of_property_read_u32(np, "color", &color);
> + ret = fwnode_property_read_u32(fwnode, "color", &color);
> if (ret < 0 && ret != -EINVAL) {
> - dev_err(chip->dev, "failed to parse 'color' of %pOF\n", np);
> + dev_err(chip->dev, "failed to parse 'color' of %pfw\n", fwnode);
> return ret;
> }
>
> led->chip = chip;
> - init_data.fwnode = of_fwnode_handle(np);
> + init_data.fwnode = fwnode;
>
> if (color == LED_COLOR_ID_RGB) {
> cdev = &led->mcdev.led_cdev;
> - ret = ktd202x_setup_led_rgb(chip, np, led, &init_data);
> + ret = ktd202x_setup_led_rgb(chip, fwnode, led, &init_data);
> } else {
> cdev = &led->cdev;
> - ret = ktd202x_setup_led_single(chip, np, led, &init_data);
> + ret = ktd202x_setup_led_single(chip, fwnode, led, &init_data);
> }
>
> if (ret) {
> @@ -490,15 +493,14 @@ static int ktd202x_add_led(struct ktd202x *chip, struct device_node *np, unsigne
> return 0;
> }
>
> -static int ktd202x_probe_dt(struct ktd202x *chip)
> +static int ktd202x_probe_fw(struct ktd202x *chip)
> {
> - struct device_node *np = dev_of_node(chip->dev), *child;
> + struct fwnode_handle *child;
> + struct device *dev = chip->dev;
> int count;
> int i = 0;
>
> - chip->num_leds = (int)(unsigned long)of_device_get_match_data(chip->dev);
> -
> - count = of_get_available_child_count(np);
> + count = device_get_child_node_count(dev);
> if (!count || count > chip->num_leds)
> return -EINVAL;
>
> @@ -507,11 +509,11 @@ static int ktd202x_probe_dt(struct ktd202x *chip)
> /* Allow the device to execute the complete reset */
> usleep_range(200, 300);
>
> - for_each_available_child_of_node(np, child) {
> + device_for_each_child_node(dev, child) {
> int ret = ktd202x_add_led(chip, child, i);
>
> if (ret) {
> - of_node_put(child);
> + fwnode_handle_put(child);
> return ret;
> }
> i++;
> @@ -554,6 +556,8 @@ static int ktd202x_probe(struct i2c_client *client)
> return ret;
> }
>
> + chip->num_leds = (unsigned long)i2c_get_match_data(client);
> +
> chip->regulators[0].supply = "vin";
> chip->regulators[1].supply = "vio";
> ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(chip->regulators), chip->regulators);
> @@ -568,7 +572,7 @@ static int ktd202x_probe(struct i2c_client *client)
> return ret;
> }
>
> - ret = ktd202x_probe_dt(chip);
> + ret = ktd202x_probe_fw(chip);
> if (ret < 0) {
> regulator_bulk_disable(ARRAY_SIZE(chip->regulators), chip->regulators);
> return ret;
> @@ -605,7 +609,7 @@ static void ktd202x_shutdown(struct i2c_client *client)
> static const struct of_device_id ktd202x_match_table[] = {
> { .compatible = "kinetic,ktd2026", .data = (void *)KTD2026_NUM_LEDS },
> { .compatible = "kinetic,ktd2027", .data = (void *)KTD2027_NUM_LEDS },
> - {},
> + {}
> };
> MODULE_DEVICE_TABLE(of, ktd202x_match_table);
>
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