[PATCH 5.13 655/800] leds: lgm-sso: Fix clock handling

From: Greg Kroah-Hartman
Date: Mon Jul 12 2021 - 05:04:02 EST


From: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>

[ Upstream commit fba8a6f2263bc54683cf3fd75df4dbd5d041c195 ]

The clock handling has a few issues:
- when getting second clock fails, the first one left prepared and enabled
- on ->remove() clocks are unprepared and disabled twice

Fix all these by converting to use bulk clock operations since both clocks
are mandatory.

Fixes: c3987cd2bca3 ("leds: lgm: Add LED controller driver for LGM SoC")
Cc: Amireddy Mallikarjuna reddy <mallikarjunax.reddy@xxxxxxxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Signed-off-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/leds/blink/leds-lgm-sso.c | 44 ++++++++++++-------------------
1 file changed, 17 insertions(+), 27 deletions(-)

diff --git a/drivers/leds/blink/leds-lgm-sso.c b/drivers/leds/blink/leds-lgm-sso.c
index 6a63846d10b5..7d5f0bf2817a 100644
--- a/drivers/leds/blink/leds-lgm-sso.c
+++ b/drivers/leds/blink/leds-lgm-sso.c
@@ -132,8 +132,7 @@ struct sso_led_priv {
struct regmap *mmap;
struct device *dev;
struct platform_device *pdev;
- struct clk *gclk;
- struct clk *fpid_clk;
+ struct clk_bulk_data clocks[2];
u32 fpid_clkrate;
u32 gptc_clkrate;
u32 freq[MAX_FREQ_RANK];
@@ -763,12 +762,11 @@ static int sso_probe_gpios(struct sso_led_priv *priv)
return sso_gpio_gc_init(dev, priv);
}

-static void sso_clk_disable(void *data)
+static void sso_clock_disable_unprepare(void *data)
{
struct sso_led_priv *priv = data;

- clk_disable_unprepare(priv->fpid_clk);
- clk_disable_unprepare(priv->gclk);
+ clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clocks), priv->clocks);
}

static int intel_sso_led_probe(struct platform_device *pdev)
@@ -785,36 +783,30 @@ static int intel_sso_led_probe(struct platform_device *pdev)
priv->dev = dev;

/* gate clock */
- priv->gclk = devm_clk_get(dev, "sso");
- if (IS_ERR(priv->gclk)) {
- dev_err(dev, "get sso gate clock failed!\n");
- return PTR_ERR(priv->gclk);
- }
+ priv->clocks[0].id = "sso";
+
+ /* fpid clock */
+ priv->clocks[1].id = "fpid";

- ret = clk_prepare_enable(priv->gclk);
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(priv->clocks), priv->clocks);
if (ret) {
- dev_err(dev, "Failed to prepare/enable sso gate clock!\n");
+ dev_err(dev, "Getting clocks failed!\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);
- }
-
- ret = clk_prepare_enable(priv->fpid_clk);
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clocks), priv->clocks);
if (ret) {
- dev_err(dev, "Failed to prepare/enable fpid clock!\n");
+ dev_err(dev, "Failed to prepare and enable clocks!\n");
return ret;
}
- priv->fpid_clkrate = clk_get_rate(priv->fpid_clk);

- ret = devm_add_action_or_reset(dev, sso_clk_disable, priv);
- if (ret) {
- dev_err(dev, "Failed to devm_add_action_or_reset, %d\n", ret);
+ ret = devm_add_action_or_reset(dev, sso_clock_disable_unprepare, priv);
+ if (ret)
return ret;
- }
+
+ priv->fpid_clkrate = clk_get_rate(priv->clocks[1].clk);
+
+ priv->mmap = syscon_node_to_regmap(dev->of_node);

priv->mmap = syscon_node_to_regmap(dev->of_node);
if (IS_ERR(priv->mmap)) {
@@ -859,8 +851,6 @@ static int intel_sso_led_remove(struct platform_device *pdev)
sso_led_shutdown(led);
}

- clk_disable_unprepare(priv->fpid_clk);
- clk_disable_unprepare(priv->gclk);
regmap_exit(priv->mmap);

return 0;
--
2.30.2