linux-kernel - [PATCH v7 01/12] leds: pwm: Remove platform

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Date:   Mon,  5 Oct 2020 22:34:40 +0200
From:   Alexander Dahl <post@...pocky.de>
To:     Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Alexander Dahl <ada@...rsis.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Alexander Dahl <post@...pocky.de>, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-amlogic@...ts.infradead.org, linux-mips@...r.kernel.org,
        Denis Osterland-Heim <denis.osterland@...hl.com>,
        Marek Behún <marek.behun@....cz>
Subject: [PATCH v7 01/12] leds: pwm: Remove platform_data support

Since commit 141f15c66d94 ("leds: pwm: remove header") that platform
interface is not usable from outside and there seems to be no in tree
user anymore.  All in-tree users of the leds-pwm driver seem to use DT
currently.  Getting rid of the old platform interface allows the
leds-pwm driver to switch over from 'devm_led_classdev_register()' to
'devm_led_classdev_register_ext()'.

Signed-off-by: Alexander Dahl <post@...pocky.de>
Cc: Denis Osterland-Heim <denis.osterland@...hl.com>
Reviewed-by: Marek Behún <marek.behun@....cz>
---

Notes:
    v6 -> v7:
      * (no changes on this patch)
    
    v5 -> v6:
      * added Reviewed-by from Marek
      * minimal commit message rewording, because a later patch was
        already applied
    
    v5:
      * added this patch to series (replacing another patch with a not
        working, different approach)

 drivers/leds/leds-pwm.c | 30 +++++-------------------------
 1 file changed, 5 insertions(+), 25 deletions(-)

diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 2a16ae0bf022..f53f9309ca6c 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -24,11 +24,6 @@ struct led_pwm {
 	unsigned int	max_brightness;
 };
 
-struct led_pwm_platform_data {
-	int		num_leds;
-	struct led_pwm	*leds;
-};
-
 struct led_pwm_data {
 	struct led_classdev	cdev;
 	struct pwm_device	*pwm;
@@ -60,6 +55,7 @@ static int led_pwm_set(struct led_classdev *led_cdev,
 	return pwm_apply_state(led_dat->pwm, &led_dat->pwmstate);
 }
 
+__attribute__((nonnull))
 static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
 		       struct led_pwm *led, struct fwnode_handle *fwnode)
 {
@@ -73,10 +69,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
 	led_data->cdev.max_brightness = led->max_brightness;
 	led_data->cdev.flags = LED_CORE_SUSPENDRESUME;
 
-	if (fwnode)
-		led_data->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL);
-	else
-		led_data->pwm = devm_pwm_get(dev, led->name);
+	led_data->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL);
 	if (IS_ERR(led_data->pwm))
 		return dev_err_probe(dev, PTR_ERR(led_data->pwm),
 				     "unable to request PWM for %s\n",
@@ -139,15 +132,11 @@ static int led_pwm_create_fwnode(struct device *dev, struct led_pwm_priv *priv)
 
 static int led_pwm_probe(struct platform_device *pdev)
 {
-	struct led_pwm_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct led_pwm_priv *priv;
-	int count, i;
 	int ret = 0;
+	int count;
 
-	if (pdata)
-		count = pdata->num_leds;
-	else
-		count = device_get_child_node_count(&pdev->dev);
+	count = device_get_child_node_count(&pdev->dev);
 
 	if (!count)
 		return -EINVAL;
@@ -157,16 +146,7 @@ static int led_pwm_probe(struct platform_device *pdev)
 	if (!priv)
 		return -ENOMEM;
 
-	if (pdata) {
-		for (i = 0; i < count; i++) {
-			ret = led_pwm_add(&pdev->dev, priv, &pdata->leds[i],
-					  NULL);
-			if (ret)
-				break;
-		}
-	} else {
-		ret = led_pwm_create_fwnode(&pdev->dev, priv);
-	}
+	ret = led_pwm_create_fwnode(&pdev->dev, priv);
 
 	if (ret)
 		return ret;
-- 
2.20.1