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| author | Karol Wrona <k.wrona@samsung.com> | 2014-07-01 19:13:59 +0200 |
|---|---|---|
| committer | Mike Turquette <mturquette@linaro.org> | 2014-07-02 09:44:47 -0700 |
| commit | 89ed7e6e68c176e77c7e2677551c91d4185fe0b4 (patch) | |
| tree | 992eb3a4f77b6b03b594b0d45bba136a182efc40 /drivers/clk/clk-s2mps11.c | |
| parent | 4da66b631f6bee2dfdb77b571418f11016a7ba68 (diff) | |
| download | lwn-89ed7e6e68c176e77c7e2677551c91d4185fe0b4.tar.gz lwn-89ed7e6e68c176e77c7e2677551c91d4185fe0b4.zip | |
clk: s2mps11: Fix clk_ops
s2mps11 clocks had registered callbacks for prepare ,unprepare and is_enabled.
During disabling unused clocks the lack of is_prepared caused that unused
s2mps11 clocks were not unprepared and stayed active.
Regmap_read is cached so it can be called in is_prepare callback
to achieve this information. Enabled field was removed from struct s2mps11_clk.
Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk/clk-s2mps11.c')
| -rw-r--r-- | drivers/clk/clk-s2mps11.c | 33 |
1 files changed, 11 insertions, 22 deletions
diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c index 9b7b5859a420..13878da1e2e4 100644 --- a/drivers/clk/clk-s2mps11.c +++ b/drivers/clk/clk-s2mps11.c @@ -46,7 +46,6 @@ struct s2mps11_clk { struct clk *clk; struct clk_lookup *lookup; u32 mask; - bool enabled; unsigned int reg; }; @@ -63,8 +62,6 @@ static int s2mps11_clk_prepare(struct clk_hw *hw) ret = regmap_update_bits(s2mps11->iodev->regmap_pmic, s2mps11->reg, s2mps11->mask, s2mps11->mask); - if (!ret) - s2mps11->enabled = true; return ret; } @@ -76,32 +73,32 @@ static void s2mps11_clk_unprepare(struct clk_hw *hw) ret = regmap_update_bits(s2mps11->iodev->regmap_pmic, s2mps11->reg, s2mps11->mask, ~s2mps11->mask); - - if (!ret) - s2mps11->enabled = false; } -static int s2mps11_clk_is_enabled(struct clk_hw *hw) +static int s2mps11_clk_is_prepared(struct clk_hw *hw) { + int ret; + u32 val; struct s2mps11_clk *s2mps11 = to_s2mps11_clk(hw); - return s2mps11->enabled; + ret = regmap_read(s2mps11->iodev->regmap_pmic, + s2mps11->reg, &val); + if (ret < 0) + return -EINVAL; + + return val & s2mps11->mask; } static unsigned long s2mps11_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { - struct s2mps11_clk *s2mps11 = to_s2mps11_clk(hw); - if (s2mps11->enabled) - return 32768; - else - return 0; + return 32768; } static struct clk_ops s2mps11_clk_ops = { .prepare = s2mps11_clk_prepare, .unprepare = s2mps11_clk_unprepare, - .is_enabled = s2mps11_clk_is_enabled, + .is_prepared = s2mps11_clk_is_prepared, .recalc_rate = s2mps11_clk_recalc_rate, }; @@ -169,7 +166,6 @@ static int s2mps11_clk_probe(struct platform_device *pdev) unsigned int s2mps11_reg; struct clk_init_data *clks_init; int i, ret = 0; - u32 val; s2mps11_clks = devm_kzalloc(&pdev->dev, sizeof(*s2mps11_clk) * S2MPS11_CLKS_NUM, GFP_KERNEL); @@ -214,13 +210,6 @@ static int s2mps11_clk_probe(struct platform_device *pdev) s2mps11_clk->mask = 1 << i; s2mps11_clk->reg = s2mps11_reg; - ret = regmap_read(s2mps11_clk->iodev->regmap_pmic, - s2mps11_clk->reg, &val); - if (ret < 0) - goto err_reg; - - s2mps11_clk->enabled = val & s2mps11_clk->mask; - s2mps11_clk->clk = devm_clk_register(&pdev->dev, &s2mps11_clk->hw); if (IS_ERR(s2mps11_clk->clk)) { |