[media] exynos4-is: Simplify fimc-is hardware polling helpers

The fimc_is_hw_wait_intsr0_intsd0() function is currently unused and
can be safely removed. The other polling function simplified and ETIME
error code is replaced with more commonly used ETIMEDOUT.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/platform/exynos4-is/fimc-is-regs.c b/drivers/media/platform/exynos4-is/fimc-is-regs.c
index f758e26..2628733 100644 (file)
--- a/drivers/media/platform/exynos4-is/fimc-is-regs.c
+++ b/drivers/media/platform/exynos4-is/fimc-is-regs.c
@@ -33,47 +33,23 @@ void fimc_is_hw_set_intgr0_gd0(struct fimc_is *is)
        mcuctl_write(INTGR0_INTGD(0), is, MCUCTL_REG_INTGR0);
 }
 
-int fimc_is_hw_wait_intsr0_intsd0(struct fimc_is *is)
-{
-       unsigned int timeout = 2000;
-       u32 cfg, status;
-
-       cfg = mcuctl_read(is, MCUCTL_REG_INTSR0);
-       status = INTSR0_GET_INTSD(0, cfg);
-
-       while (status) {
-               cfg = mcuctl_read(is, MCUCTL_REG_INTSR0);
-               status = INTSR0_GET_INTSD(0, cfg);
-               if (timeout == 0) {
-                       dev_warn(&is->pdev->dev, "%s timeout\n",
-                                __func__);
-                       return -ETIME;
-               }
-               timeout--;
-               udelay(1);
-       }
-       return 0;
-}
-
 int fimc_is_hw_wait_intmsr0_intmsd0(struct fimc_is *is)
 {
        unsigned int timeout = 2000;
        u32 cfg, status;
 
-       cfg = mcuctl_read(is, MCUCTL_REG_INTMSR0);
-       status = INTMSR0_GET_INTMSD(0, cfg);
-
-       while (status) {
+       do {
                cfg = mcuctl_read(is, MCUCTL_REG_INTMSR0);
                status = INTMSR0_GET_INTMSD(0, cfg);
-               if (timeout == 0) {
+
+               if (--timeout == 0) {
                        dev_warn(&is->pdev->dev, "%s timeout\n",
                                 __func__);
-                       return -ETIME;
+                       return -ETIMEDOUT;
                }
-               timeout--;
                udelay(1);
-       }
+       } while (status != 0);
+
        return 0;
 }
 

diff --git a/drivers/media/platform/exynos4-is/fimc-is-regs.h b/drivers/media/platform/exynos4-is/fimc-is-regs.h
index 5fa2fda..1d9d4ff 100644 (file)
--- a/drivers/media/platform/exynos4-is/fimc-is-regs.h
+++ b/drivers/media/platform/exynos4-is/fimc-is-regs.h
@@ -145,7 +145,6 @@ void fimc_is_fw_clear_irq2(struct fimc_is *is);
 int fimc_is_hw_get_params(struct fimc_is *is, unsigned int num);
 
 void fimc_is_hw_set_intgr0_gd0(struct fimc_is *is);
-int fimc_is_hw_wait_intsr0_intsd0(struct fimc_is *is);
 int fimc_is_hw_wait_intmsr0_intmsd0(struct fimc_is *is);
 void fimc_is_hw_set_sensor_num(struct fimc_is *is);
 void fimc_is_hw_stream_on(struct fimc_is *is);