diff options
Diffstat (limited to 'drivers/misc/atmel_pwm.c')
| -rw-r--r-- | drivers/misc/atmel_pwm.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/drivers/misc/atmel_pwm.c b/drivers/misc/atmel_pwm.c index f8d3b9a76cb..a6dc56e1bc5 100644 --- a/drivers/misc/atmel_pwm.c +++ b/drivers/misc/atmel_pwm.c @@ -1,6 +1,7 @@ #include <linux/module.h> #include <linux/clk.h> #include <linux/err.h> +#include <linux/slab.h> #include <linux/io.h> #include <linux/interrupt.h> #include <linux/platform_device.h> @@ -89,8 +90,10 @@ int pwm_channel_alloc(int index, struct pwm_channel *ch) unsigned long flags; int status = 0; - /* insist on PWM init, with this signal pinned out */ - if (!pwm || !(pwm->mask & 1 << index)) + if (!pwm) + return -EPROBE_DEFER; + + if (!(pwm->mask & 1 << index)) return -ENODEV; if (index < 0 || index >= PWM_NCHAN || !ch) @@ -211,8 +214,7 @@ int pwm_clk_alloc(unsigned prescale, unsigned div) if ((mr & 0xffff) == 0) { mr |= val; ret = PWM_CPR_CLKA; - } - if ((mr & (0xffff << 16)) == 0) { + } else if ((mr & (0xffff << 16)) == 0) { mr |= val << 16; ret = PWM_CPR_CLKB; } @@ -329,10 +331,10 @@ static int __init pwm_probe(struct platform_device *pdev) p->pdev = pdev; p->mask = *mp; p->irq = irq; - p->base = ioremap(r->start, r->end - r->start + 1); + p->base = ioremap(r->start, resource_size(r)); if (!p->base) goto fail; - p->clk = clk_get(&pdev->dev, "mck"); + p->clk = clk_get(&pdev->dev, "pwm_clk"); if (IS_ERR(p->clk)) { status = PTR_ERR(p->clk); p->clk = NULL; @@ -393,17 +395,8 @@ static struct platform_driver atmel_pwm_driver = { */ }; -static int __init pwm_init(void) -{ - return platform_driver_probe(&atmel_pwm_driver, pwm_probe); -} -module_init(pwm_init); - -static void __exit pwm_exit(void) -{ - platform_driver_unregister(&atmel_pwm_driver); -} -module_exit(pwm_exit); +module_platform_driver_probe(atmel_pwm_driver, pwm_probe); MODULE_DESCRIPTION("Driver for AT32/AT91 PWM module"); MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:atmel_pwm"); |