clk: s2mps11: Use kcalloc instead of kzalloc for array allocation

This patch cleans up the driver for,

  - Use devm_kcalloc() variant instead of devm_kzalloc() for array
    allocation.
  - clk_prepare()/unprepare(), remove "ret" variable as it is not required
  - use __exit for cleanup function

As I am referring this driver as a reference for my 88pm800 clk driver,
applying same changes here as well.

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
index ba7fb1b..d266299 100644 (file)
--- a/drivers/clk/clk-s2mps11.c
+++ b/drivers/clk/clk-s2mps11.c
@@ -58,21 +58,17 @@ static struct s2mps11_clk *to_s2mps11_clk(struct clk_hw *hw)
 static int s2mps11_clk_prepare(struct clk_hw *hw)
 {
        struct s2mps11_clk *s2mps11 = to_s2mps11_clk(hw);
-       int ret;
 
-       ret = regmap_update_bits(s2mps11->iodev->regmap_pmic,
+       return regmap_update_bits(s2mps11->iodev->regmap_pmic,
                                 s2mps11->reg,
                                 s2mps11->mask, s2mps11->mask);
-
-       return ret;
 }
 
 static void s2mps11_clk_unprepare(struct clk_hw *hw)
 {
        struct s2mps11_clk *s2mps11 = to_s2mps11_clk(hw);
-       int ret;
 
-       ret = regmap_update_bits(s2mps11->iodev->regmap_pmic, s2mps11->reg,
+       regmap_update_bits(s2mps11->iodev->regmap_pmic, s2mps11->reg,
                           s2mps11->mask, ~s2mps11->mask);
 }
 
@@ -186,15 +182,15 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
        struct clk_init_data *clks_init;
        int i, ret = 0;
 
-       s2mps11_clks = devm_kzalloc(&pdev->dev, sizeof(*s2mps11_clk) *
-                                       S2MPS11_CLKS_NUM, GFP_KERNEL);
+       s2mps11_clks = devm_kcalloc(&pdev->dev, S2MPS11_CLKS_NUM,
+                               sizeof(*s2mps11_clk), GFP_KERNEL);
        if (!s2mps11_clks)
                return -ENOMEM;
 
        s2mps11_clk = s2mps11_clks;
 
-       clk_table = devm_kzalloc(&pdev->dev, sizeof(struct clk *) *
-                                S2MPS11_CLKS_NUM, GFP_KERNEL);
+       clk_table = devm_kcalloc(&pdev->dev, S2MPS11_CLKS_NUM,
+                               sizeof(struct clk *), GFP_KERNEL);
        if (!clk_table)
                return -ENOMEM;
 
@@ -316,7 +312,7 @@ static int __init s2mps11_clk_init(void)
 }
 subsys_initcall(s2mps11_clk_init);
 
-static void __init s2mps11_clk_cleanup(void)
+static void __exit s2mps11_clk_cleanup(void)
 {
        platform_driver_unregister(&s2mps11_clk_driver);
 }