diff options
Diffstat (limited to 'arch/arm/mach-pxa/pwm.c')
| -rw-r--r-- | arch/arm/mach-pxa/pwm.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/arm/mach-pxa/pwm.c b/arch/arm/mach-pxa/pwm.c index 92fef391d99..7c86dd1d108 100644 --- a/arch/arm/mach-pxa/pwm.c +++ b/arch/arm/mach-pxa/pwm.c @@ -36,6 +36,7 @@ struct pwm_device { const char *label; struct clk *clk; + int clk_enabled; void __iomem *mmio_base; unsigned int use_count; @@ -87,13 +88,23 @@ EXPORT_SYMBOL(pwm_config); int pwm_enable(struct pwm_device *pwm) { - return clk_enable(pwm->clk); + int rc = 0; + + if (!pwm->clk_enabled) { + rc = clk_enable(pwm->clk); + if (!rc) + pwm->clk_enabled = 1; + } + return rc; } EXPORT_SYMBOL(pwm_enable); void pwm_disable(struct pwm_device *pwm) { - clk_disable(pwm->clk); + if (pwm->clk_enabled) { + clk_disable(pwm->clk); + pwm->clk_enabled = 0; + } } EXPORT_SYMBOL(pwm_disable); @@ -161,6 +172,7 @@ static struct pwm_device *pwm_probe(struct platform_device *pdev, ret = PTR_ERR(pwm->clk); goto err_free; } + pwm->clk_enabled = 0; pwm->use_count = 0; pwm->pwm_id = pwm_id; |