linux-kernel - [PATCH v2] leds: lp55xx: Use devm_clk_get

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Message-ID: <20240821013725.785956-1-link@vivo.com>
Date: Wed, 21 Aug 2024 09:37:25 +0800
From: Huan Yang <link@...o.com>
To: Pavel Machek <pavel@....cz>,
	Lee Jones <lee@...nel.org>,
	linux-leds@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: opensource.kernel@...o.com,
	Huan Yang <link@...o.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH v2] leds: lp55xx: Use devm_clk_get_enabled() helpers

lp55xx lp55xx_is_extclk_used get, enable clk and
deinit_device disable and unprepare it.

This can use a simplifies helper to cover. And no need to save clk
pointer, this can save a little memory.

Signed-off-by: Huan Yang <link@...o.com>
Suggested-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
v1 -> v2: remove clk pointer from lp55xx_chip

 drivers/leds/leds-lp55xx-common.c | 15 ++-------------
 drivers/leds/leds-lp55xx-common.h |  1 -
 2 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 29e7142dca72..1bbe170a217b 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -965,24 +965,16 @@ EXPORT_SYMBOL_GPL(lp55xx_update_bits);
 bool lp55xx_is_extclk_used(struct lp55xx_chip *chip)
 {
 	struct clk *clk;
-	int err;
 
-	clk = devm_clk_get(&chip->cl->dev, "32k_clk");
+	clk = devm_clk_get_enabled(&chip->cl->dev, "32k_clk");
 	if (IS_ERR(clk))
 		goto use_internal_clk;
 
-	err = clk_prepare_enable(clk);
-	if (err)
+	if (clk_get_rate(clk) != LP55XX_CLK_32K)
 		goto use_internal_clk;
 
-	if (clk_get_rate(clk) != LP55XX_CLK_32K) {
-		clk_disable_unprepare(clk);
-		goto use_internal_clk;
-	}
-
 	dev_info(&chip->cl->dev, "%dHz external clock used\n",	LP55XX_CLK_32K);
 
-	chip->clk = clk;
 	return true;
 
 use_internal_clk:
@@ -995,9 +987,6 @@ static void lp55xx_deinit_device(struct lp55xx_chip *chip)
 {
 	struct lp55xx_platform_data *pdata = chip->pdata;
 
-	if (chip->clk)
-		clk_disable_unprepare(chip->clk);
-
 	if (pdata->enable_gpiod)
 		gpiod_set_value(pdata->enable_gpiod, 0);
 }
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index 1bb7c559662c..8fd64ec40919 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -193,7 +193,6 @@ struct lp55xx_engine {
  */
 struct lp55xx_chip {
 	struct i2c_client *cl;
-	struct clk *clk;
 	struct lp55xx_platform_data *pdata;
 	struct mutex lock;	/* lock for user-space interface */
 	int num_leds;
-- 
2.45.2