[PATCH 4/8] drm/exynos/dsi: Use clk bulk API
Maciej Purski
m.purski at samsung.com
Mon Feb 19 07:44:02 PST 2018
Using bulk clk functions simplifies the driver's code. Use devm_clk_bulk
functions instead of iterating over an array of clks.
In order to achieve consistency with other drivers, define clock names
in driver's variants structures.
Signed-off-by: Maciej Purski <m.purski at samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 68 +++++++++++++++------------------
1 file changed, 30 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 7904ffa..46a8b5c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -209,11 +209,7 @@
#define DSI_XFER_TIMEOUT_MS 100
#define DSI_RX_FIFO_EMPTY 0x30800002
-#define OLD_SCLK_MIPI_CLK_NAME "pll_clk"
-
-static char *clk_names[5] = { "bus_clk", "sclk_mipi",
- "phyclk_mipidphy0_bitclkdiv8", "phyclk_mipidphy0_rxclkesc0",
- "sclk_rgb_vclk_to_dsim0" };
+#define DSI_MAX_CLOCKS 5
enum exynos_dsi_transfer_type {
EXYNOS_DSI_TX,
@@ -243,6 +239,7 @@ struct exynos_dsi_driver_data {
unsigned int plltmr_reg;
unsigned int has_freqband:1;
unsigned int has_clklane_stop:1;
+ const char *clock_names[DSI_MAX_CLOCKS];
unsigned int num_clks;
unsigned int max_freq;
unsigned int wait_for_reset;
@@ -259,7 +256,7 @@ struct exynos_dsi {
void __iomem *reg_base;
struct phy *phy;
- struct clk **clks;
+ struct clk_bulk_data *clks;
struct regulator_bulk_data supplies[2];
int irq;
int te_gpio;
@@ -453,6 +450,7 @@ static const struct exynos_dsi_driver_data exynos3_dsi_driver_data = {
.plltmr_reg = 0x50,
.has_freqband = 1,
.has_clklane_stop = 1,
+ .clock_names = {"bus_clk", "pll_clk"},
.num_clks = 2,
.max_freq = 1000,
.wait_for_reset = 1,
@@ -465,6 +463,7 @@ static const struct exynos_dsi_driver_data exynos4_dsi_driver_data = {
.plltmr_reg = 0x50,
.has_freqband = 1,
.has_clklane_stop = 1,
+ .clock_names = {"bus_clk", "sclk_mipi"},
.num_clks = 2,
.max_freq = 1000,
.wait_for_reset = 1,
@@ -475,6 +474,7 @@ static const struct exynos_dsi_driver_data exynos4_dsi_driver_data = {
static const struct exynos_dsi_driver_data exynos5_dsi_driver_data = {
.reg_ofs = exynos_reg_ofs,
.plltmr_reg = 0x58,
+ .clock_names = {"bus_clk", "pll_clk"},
.num_clks = 2,
.max_freq = 1000,
.wait_for_reset = 1,
@@ -486,6 +486,10 @@ static const struct exynos_dsi_driver_data exynos5433_dsi_driver_data = {
.reg_ofs = exynos5433_reg_ofs,
.plltmr_reg = 0xa0,
.has_clklane_stop = 1,
+ .clock_names = {"bus_clk", "phyclk_mipidphy0_bitclkdiv8",
+ "phyclk_mipidphy0_rxclkesc0",
+ "sclk_rgb_vclk_to_dsim0",
+ "sclk_mipi"},
.num_clks = 5,
.max_freq = 1500,
.wait_for_reset = 0,
@@ -497,6 +501,7 @@ static const struct exynos_dsi_driver_data exynos5422_dsi_driver_data = {
.reg_ofs = exynos5433_reg_ofs,
.plltmr_reg = 0xa0,
.has_clklane_stop = 1,
+ .clock_names = {"bus_clk", "pll_clk"},
.num_clks = 2,
.max_freq = 1500,
.wait_for_reset = 1,
@@ -1711,7 +1716,7 @@ static int exynos_dsi_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct resource *res;
struct exynos_dsi *dsi;
- int ret, i;
+ int ret;
dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
if (!dsi)
@@ -1743,26 +1748,15 @@ static int exynos_dsi_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
}
- dsi->clks = devm_kzalloc(dev,
- sizeof(*dsi->clks) * dsi->driver_data->num_clks,
- GFP_KERNEL);
- if (!dsi->clks)
- return -ENOMEM;
+ dsi->clks = devm_clk_bulk_alloc(dev, dsi->driver_data->num_clks,
+ dsi->driver_data->clock_names);
+ if (IS_ERR(dsi->clks))
+ return PTR_ERR(dsi->clks);
- for (i = 0; i < dsi->driver_data->num_clks; i++) {
- dsi->clks[i] = devm_clk_get(dev, clk_names[i]);
- if (IS_ERR(dsi->clks[i])) {
- if (strcmp(clk_names[i], "sclk_mipi") == 0) {
- strcpy(clk_names[i], OLD_SCLK_MIPI_CLK_NAME);
- i--;
- continue;
- }
-
- dev_info(dev, "failed to get the clock: %s\n",
- clk_names[i]);
- return PTR_ERR(dsi->clks[i]);
- }
- }
+ ret = devm_clk_bulk_get(dev, dsi->driver_data->num_clks,
+ dsi->clks);
+ if (ret < 0)
+ return ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dsi->reg_base = devm_ioremap_resource(dev, res);
@@ -1817,7 +1811,7 @@ 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);
const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- int ret, i;
+ int ret;
usleep_range(10000, 20000);
@@ -1833,8 +1827,7 @@ static int __maybe_unused exynos_dsi_suspend(struct device *dev)
phy_power_off(dsi->phy);
- for (i = driver_data->num_clks - 1; i > -1; i--)
- clk_disable_unprepare(dsi->clks[i]);
+ clk_bulk_disable_unprepare(driver_data->num_clks, dsi->clks);
ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
if (ret < 0)
@@ -1848,7 +1841,7 @@ 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);
const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- int ret, i;
+ int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
if (ret < 0) {
@@ -1856,23 +1849,22 @@ static int __maybe_unused exynos_dsi_resume(struct device *dev)
return ret;
}
- for (i = 0; i < driver_data->num_clks; i++) {
- ret = clk_prepare_enable(dsi->clks[i]);
- if (ret < 0)
- goto err_clk;
- }
+ ret = clk_bulk_prepare_enable(driver_data->num_clks, dsi->clks);
+ if (ret < 0)
+ goto err_clk;
ret = phy_power_on(dsi->phy);
if (ret < 0) {
dev_err(dsi->dev, "cannot enable phy %d\n", ret);
- goto err_clk;
+ goto err_phy;
}
return 0;
+err_phy:
+ clk_bulk_disable_unprepare(driver_data->num_clks, dsi->clks);
+
err_clk:
- while (--i > -1)
- clk_disable_unprepare(dsi->clks[i]);
regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
return ret;
--
2.7.4
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