diff options
Diffstat (limited to 'drivers/misc/atmel-ssc.c')
| -rw-r--r-- | drivers/misc/atmel-ssc.c | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c index 1abd5ad5992..22de1372764 100644 --- a/drivers/misc/atmel-ssc.c +++ b/drivers/misc/atmel-ssc.c @@ -19,7 +19,6 @@ #include <linux/module.h> #include <linux/of.h> -#include <linux/pinctrl/consumer.h> /* Serialize access to ssc_list and user count */ static DEFINE_SPINLOCK(user_lock); @@ -58,7 +57,7 @@ struct ssc_device *ssc_request(unsigned int ssc_num) ssc->user++; spin_unlock(&user_lock); - clk_enable(ssc->clk); + clk_prepare_enable(ssc->clk); return ssc; } @@ -66,14 +65,19 @@ EXPORT_SYMBOL(ssc_request); void ssc_free(struct ssc_device *ssc) { + bool disable_clk = true; + spin_lock(&user_lock); - if (ssc->user) { + if (ssc->user) ssc->user--; - clk_disable(ssc->clk); - } else { + else { + disable_clk = false; dev_dbg(&ssc->pdev->dev, "device already free\n"); } spin_unlock(&user_lock); + + if (disable_clk) + clk_disable_unprepare(ssc->clk); } EXPORT_SYMBOL(ssc_free); @@ -132,13 +136,6 @@ static int ssc_probe(struct platform_device *pdev) struct resource *regs; struct ssc_device *ssc; const struct atmel_ssc_platform_data *plat_dat; - struct pinctrl *pinctrl; - - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); - if (IS_ERR(pinctrl)) { - dev_err(&pdev->dev, "Failed to request pinctrl\n"); - return PTR_ERR(pinctrl); - } ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL); if (!ssc) { @@ -153,6 +150,12 @@ static int ssc_probe(struct platform_device *pdev) return -ENODEV; ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat; + if (pdev->dev.of_node) { + struct device_node *np = pdev->dev.of_node; + ssc->clk_from_rk_pin = + of_property_read_bool(np, "atmel,clk-from-rk-pin"); + } + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); ssc->regs = devm_ioremap_resource(&pdev->dev, regs); if (IS_ERR(ssc->regs)) @@ -167,10 +170,10 @@ static int ssc_probe(struct platform_device *pdev) } /* disable all interrupts */ - clk_enable(ssc->clk); + clk_prepare_enable(ssc->clk); ssc_writel(ssc->regs, IDR, -1); ssc_readl(ssc->regs, SR); - clk_disable(ssc->clk); + clk_disable_unprepare(ssc->clk); ssc->irq = platform_get_irq(pdev, 0); if (!ssc->irq) { |