[PATCH v2] drm/exynos: dsi: use generic of_device_get_match_data helper

[Marek Szyprowski]

Simplify code by replacing custom code by generic helper and add missing
const qualifier to driver data structures.

Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
---
v2:
- added missing const qualifier to driver data structures
---
 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c 
b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 63c84a106c0b..72c3565d22ee 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -280,7 +280,7 @@ struct exynos_dsi {
        spinlock_t transfer_lock; /* protects transfer_list */
        struct list_head transfer_list;

-       struct exynos_dsi_driver_data *driver_data;
+       const struct exynos_dsi_driver_data *driver_data;
        struct device_node *bridge_node;
 };

@@ -532,15 +532,6 @@ static const struct of_device_id exynos_dsi_of_match[] = {
        { }
 };

-static inline struct exynos_dsi_driver_data *exynos_dsi_get_driver_data(
-                                               struct platform_device *pdev)
-{
-       const struct of_device_id *of_id =
-                       of_match_device(exynos_dsi_of_match, &pdev->dev);
-
-       return (struct exynos_dsi_driver_data *)of_id->data;
-}
-
 static void exynos_dsi_wait_for_reset(struct exynos_dsi *dsi)
 {
        if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300)))
@@ -564,7 +555,7 @@ static void exynos_dsi_reset(struct exynos_dsi *dsi)
 static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi,
                unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s)
 {
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
        unsigned long best_freq = 0;
        u32 min_delta = 0xffffffff;
        u8 p_min, p_max;
@@ -618,7 +609,7 @@ static unsigned long exynos_dsi_pll_find_pms(struct 
exynos_dsi *dsi,
 static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi,
                                        unsigned long freq)
 {
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
        unsigned long fin, fout;
        int timeout;
        u8 p, s;
@@ -712,7 +703,7 @@ static int exynos_dsi_enable_clock(struct exynos_dsi *dsi)

 static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
 {
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
        const unsigned int *reg_values = driver_data->reg_values;
        u32 reg;

@@ -790,7 +781,7 @@ static void exynos_dsi_enable_lane(struct exynos_dsi *dsi, 
u32 lane)

 static int exynos_dsi_init_link(struct exynos_dsi *dsi)
 {
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
        int timeout;
        u32 reg;
        u32 lanes_mask;
@@ -1334,7 +1325,7 @@ static void exynos_dsi_disable_irq(struct exynos_dsi *dsi)

 static int exynos_dsi_init(struct exynos_dsi *dsi)
 {
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;

        exynos_dsi_reset(dsi);
        exynos_dsi_enable_irq(dsi);
@@ -1833,7 +1824,7 @@ static int exynos_dsi_probe(struct platform_device *pdev)
        dsi->dsi_host.dev = dev;

        dsi->dev = dev;
-       dsi->driver_data = exynos_dsi_get_driver_data(pdev);
+       dsi->driver_data = of_device_get_match_data(dev);

        ret = exynos_dsi_parse_dt(dsi);
        if (ret)
@@ -1917,7 +1908,7 @@ static int __maybe_unused exynos_dsi_suspend(struct 
device *dev)
 {
        struct drm_encoder *encoder = dev_get_drvdata(dev);
        struct exynos_dsi *dsi = encoder_to_dsi(encoder);
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
        int ret, i;

        usleep_range(10000, 20000);
@@ -1948,7 +1939,7 @@ static int __maybe_unused exynos_dsi_resume(struct device 
*dev)
 {
        struct drm_encoder *encoder = dev_get_drvdata(dev);
        struct exynos_dsi *dsi = encoder_to_dsi(encoder);
-       struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+       const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
        int ret, i;

        ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
-- 
1.9.2