[media] exynos4-is: Remove dependency on SYSCON for non-dt platforms

Currently the whole driver depends on MFD_SYSCON, which in turn
depends on OF. To allow to use the driver on non-dt platforms
(S5PV210) the SYSREG support is made conditional (it is needed
only for dt enabled platforms) and MFD_SYSCON is selected if
OF is enabled, instead of depending on OF.

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/Kconfig b/drivers/media/platform/exynos4-is/Kconfig
index 91dbd4b..ae57920 100644 (file)
--- a/drivers/media/platform/exynos4-is/Kconfig
+++ b/drivers/media/platform/exynos4-is/Kconfig
@@ -2,7 +2,6 @@
 config VIDEO_SAMSUNG_EXYNOS4_IS
        bool "Samsung S5P/EXYNOS4 SoC series Camera Subsystem driver"
        depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && PLAT_S5P && PM_RUNTIME
-       depends on MFD_SYSCON
        help
          Say Y here to enable camera host interface devices for
          Samsung S5P and EXYNOS SoC series.
@@ -14,6 +13,7 @@ config VIDEO_S5P_FIMC
        depends on I2C
        select VIDEOBUF2_DMA_CONTIG
        select V4L2_MEM2MEM_DEV
+       select MFD_SYSCON if OF
        help
          This is a V4L2 driver for Samsung S5P and EXYNOS4 SoC camera host
          interface and video postprocessor (FIMC) devices.

diff --git a/drivers/media/platform/exynos4-is/fimc-core.c b/drivers/media/platform/exynos4-is/fimc-core.c
index 44239e5..6b4a244 100644 (file)
--- a/drivers/media/platform/exynos4-is/fimc-core.c
+++ b/drivers/media/platform/exynos4-is/fimc-core.c
@@ -966,8 +966,7 @@ static int fimc_probe(struct platform_device *pdev)
        spin_lock_init(&fimc->slock);
        mutex_init(&fimc->lock);
 
-       fimc->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
-                                               "samsung,sysreg");
+       fimc->sysreg = fimc_get_sysreg_regmap(dev->of_node);
        if (IS_ERR(fimc->sysreg))
                return PTR_ERR(fimc->sysreg);
 

diff --git a/drivers/media/platform/exynos4-is/fimc-core.h b/drivers/media/platform/exynos4-is/fimc-core.h
index 793333a..7d361b2 100644 (file)
--- a/drivers/media/platform/exynos4-is/fimc-core.h
+++ b/drivers/media/platform/exynos4-is/fimc-core.h
@@ -15,6 +15,7 @@
 #include <linux/regmap.h>
 #include <linux/sched.h>
 #include <linux/spinlock.h>
+#include <linux/mfd/syscon.h>
 #include <linux/types.h>
 #include <linux/videodev2.h>
 #include <linux/io.h>
@@ -645,6 +646,15 @@ void fimc_unregister_m2m_device(struct fimc_dev *fimc);
 int fimc_register_driver(void);
 void fimc_unregister_driver(void);
 
+#ifdef CONFIG_MFD_SYSCON
+static inline struct regmap * fimc_get_sysreg_regmap(struct device_node *node)
+{
+       return syscon_regmap_lookup_by_phandle(node, "samsung,sysreg");
+}
+#else
+#define fimc_get_sysreg_regmap(node) (NULL)
+#endif
+
 /* -----------------------------------------------------*/
 /* fimc-m2m.c */
 void fimc_m2m_job_finish(struct fimc_ctx *ctx, int vb_state);

diff --git a/drivers/media/platform/exynos4-is/fimc-reg.c b/drivers/media/platform/exynos4-is/fimc-reg.c
index c276eb8..c82e9bd 100644 (file)
--- a/drivers/media/platform/exynos4-is/fimc-reg.c
+++ b/drivers/media/platform/exynos4-is/fimc-reg.c
@@ -805,6 +805,9 @@ int fimc_hw_camblk_cfg_writeback(struct fimc_dev *fimc)
        unsigned int mask, val, camblk_cfg;
        int ret;
 
+       if (map == NULL)
+               return 0;
+
        ret = regmap_read(map, SYSREG_CAMBLK, &camblk_cfg);
        if (ret < 0 || ((camblk_cfg & 0x00700000) >> 20 != 0x3))
                return ret;