clocksource: samsung_pwm_timer: Do not request PWM mem region

PWM registers are shared between clocksource and PWM drivers and so can
not be claimed for exclusive use.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Mark Brown <broonie@linaro.org>
Tested-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 1 insertions, 10 deletions

diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c
index 584b5472eea3..3fa5b07fa50d 100644
--- a/drivers/clocksource/samsung_pwm_timer.c
+++ b/drivers/clocksource/samsung_pwm_timer.c
@@ -404,7 +404,6 @@ void __init samsung_pwm_clocksource_init(void __iomem *base,
 static void __init samsung_pwm_alloc(struct device_node *np,
                                      const struct samsung_pwm_variant *variant)
 {
-        struct resource res;
         struct property *prop;
         const __be32 *cur;
         u32 val;
@@ -423,17 +422,9 @@ static void __init samsung_pwm_alloc(struct device_node *np,
                 pwm.variant.output_mask |= 1 << val;
         }
 
-        of_address_to_resource(np, 0, &res);
-        if (!request_mem_region(res.start,
-                                resource_size(&res), "samsung-pwm")) {
-                pr_err("%s: failed to request IO mem region\n", __func__);
-                return;
-        }
-
-        pwm.base = ioremap(res.start, resource_size(&res));
+        pwm.base = of_iomap(np, 0);
         if (!pwm.base) {
                 pr_err("%s: failed to map PWM registers\n", __func__);
-                release_mem_region(res.start, resource_size(&res));
                 return;
         }