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| author | Axel Lin <axel.lin@ingics.com> | 2013-03-31 23:04:31 +0800 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@avionic-design.de> | 2013-04-02 11:31:37 +0200 |
| commit | b014a30c5991e67aa90b6ff9bd4ec16435bbcefd (patch) | |
| tree | bd8053a202515f8d5d6792d6958c4e82b589a007 /drivers/pwm/pwm-pxa.c | |
| parent | 72da70e77f885ec9a79af9c13ff1c79b6136b75f (diff) | |
| download | lwn-b014a30c5991e67aa90b6ff9bd4ec16435bbcefd.tar.gz lwn-b014a30c5991e67aa90b6ff9bd4ec16435bbcefd.zip | |
pwm: pxa: Remove clk_enabled field from struct pxa_pwm_chip
clk_enable/clk_disable maintain an enable_count, clk_prepare and clk_unprepare
also maintain a prepare_count. These APIs will do prepare/enable when the first
user calling these APIs, and do disable/unprepare when the corresponding counter
reach 0. Thus We don't need to maintain a clk_enabled counter here.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Diffstat (limited to 'drivers/pwm/pwm-pxa.c')
| -rw-r--r-- | drivers/pwm/pwm-pxa.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c index 20370e61de5a..b78988255aee 100644 --- a/drivers/pwm/pwm-pxa.c +++ b/drivers/pwm/pwm-pxa.c @@ -48,7 +48,6 @@ struct pxa_pwm_chip { struct device *dev; struct clk *clk; - int clk_enabled; void __iomem *mmio_base; }; @@ -108,24 +107,15 @@ static int pxa_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, static int pxa_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) { struct pxa_pwm_chip *pc = to_pxa_pwm_chip(chip); - int rc = 0; - if (!pc->clk_enabled) { - rc = clk_prepare_enable(pc->clk); - if (!rc) - pc->clk_enabled++; - } - return rc; + return clk_prepare_enable(pc->clk); } static void pxa_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) { struct pxa_pwm_chip *pc = to_pxa_pwm_chip(chip); - if (pc->clk_enabled) { - clk_disable_unprepare(pc->clk); - pc->clk_enabled--; - } + clk_disable_unprepare(pc->clk); } static struct pwm_ops pxa_pwm_ops = { @@ -152,8 +142,6 @@ static int pwm_probe(struct platform_device *pdev) if (IS_ERR(pwm->clk)) return PTR_ERR(pwm->clk); - pwm->clk_enabled = 0; - pwm->chip.dev = &pdev->dev; pwm->chip.ops = &pxa_pwm_ops; pwm->chip.base = -1; |