From 26269af95af83145a3bccca41344c66502fdded9 Mon Sep 17 00:00:00 2001 From: Hyungwon Hwang Date: Fri, 12 Jun 2015 21:59:03 +0900 Subject: [PATCH] drm/exynos: dsi: rename pll_clk to sclk_clk This patch renames pll_clk to sclk_clk. The clock referenced by pll_clk is actually not the pll input clock for dsi. The pll input clock comes from the board's oscillator directly. But for the backward compatibility, the old clock name "pll_clk" is also OK. Signed-off-by: Hyungwon Hwang Signed-off-by: Inki Dae --- .../devicetree/bindings/video/exynos_dsim.txt | 7 ++-- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 36 +++++++++---------- 2 files changed, 20 insertions(+), 23 deletions(-) diff --git a/Documentation/devicetree/bindings/video/exynos_dsim.txt b/Documentation/devicetree/bindings/video/exynos_dsim.txt index 802aa7ef64e5..44659dd62b80 100644 --- a/Documentation/devicetree/bindings/video/exynos_dsim.txt +++ b/Documentation/devicetree/bindings/video/exynos_dsim.txt @@ -10,13 +10,14 @@ Required properties: - interrupts: should contain DSI interrupt - clocks: list of clock specifiers, must contain an entry for each required entry in clock-names - - clock-names: should include "bus_clk"and "pll_clk" entries + - clock-names: should include "bus_clk"and "sclk_mipi" entries + the use of "pll_clk" is deprecated - phys: list of phy specifiers, must contain an entry for each required entry in phy-names - phy-names: should include "dsim" entry - vddcore-supply: MIPI DSIM Core voltage supply (e.g. 1.1V) - vddio-supply: MIPI DSIM I/O and PLL voltage supply (e.g. 1.8V) - - samsung,pll-clock-frequency: specifies frequency of the "pll_clk" clock + - samsung,pll-clock-frequency: specifies frequency of the oscillator clock - #address-cells, #size-cells: should be set respectively to <1> and <0> according to DSI host bindings (see MIPI DSI bindings [1]) @@ -48,7 +49,7 @@ Example: reg = <0x11C80000 0x10000>; interrupts = <0 79 0>; clocks = <&clock 286>, <&clock 143>; - clock-names = "bus_clk", "pll_clk"; + clock-names = "bus_clk", "sclk_mipi"; phys = <&mipi_phy 1>; phy-names = "dsim"; vddcore-supply = <&vusb_reg>; diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index c1999ad4cdcb..a3bfac2bb713 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -235,6 +235,8 @@ #define DSI_XFER_TIMEOUT_MS 100 #define DSI_RX_FIFO_EMPTY 0x30800002 +#define OLD_SCLK_MIPI_CLK_NAME "pll_clk" + enum exynos_dsi_transfer_type { EXYNOS_DSI_TX, EXYNOS_DSI_RX, @@ -279,7 +281,7 @@ struct exynos_dsi { void __iomem *reg_base; struct phy *phy; - struct clk *pll_clk; + struct clk *sclk_clk; struct clk *bus_clk; struct regulator_bulk_data supplies[2]; int irq; @@ -433,16 +435,7 @@ static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi, u16 m; u32 reg; - clk_set_rate(dsi->pll_clk, dsi->pll_clk_rate); - - fin = clk_get_rate(dsi->pll_clk); - if (!fin) { - dev_err(dsi->dev, "failed to get PLL clock frequency\n"); - return 0; - } - - dev_dbg(dsi->dev, "PLL input frequency: %lu\n", fin); - + fin = dsi->pll_clk_rate; fout = exynos_dsi_pll_find_pms(dsi, fin, freq, &p, &m, &s); if (!fout) { dev_err(dsi->dev, @@ -1313,10 +1306,10 @@ static int exynos_dsi_poweron(struct exynos_dsi *dsi) goto err_bus_clk; } - ret = clk_prepare_enable(dsi->pll_clk); + ret = clk_prepare_enable(dsi->sclk_clk); if (ret < 0) { dev_err(dsi->dev, "cannot enable pll clock %d\n", ret); - goto err_pll_clk; + goto err_sclk_clk; } ret = phy_power_on(dsi->phy); @@ -1328,8 +1321,8 @@ static int exynos_dsi_poweron(struct exynos_dsi *dsi) return 0; err_phy: - clk_disable_unprepare(dsi->pll_clk); -err_pll_clk: + clk_disable_unprepare(dsi->sclk_clk); +err_sclk_clk: clk_disable_unprepare(dsi->bus_clk); err_bus_clk: regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies); @@ -1355,7 +1348,7 @@ static void exynos_dsi_poweroff(struct exynos_dsi *dsi) phy_power_off(dsi->phy); - clk_disable_unprepare(dsi->pll_clk); + clk_disable_unprepare(dsi->sclk_clk); clk_disable_unprepare(dsi->bus_clk); ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies); @@ -1722,10 +1715,13 @@ static int exynos_dsi_probe(struct platform_device *pdev) return -EPROBE_DEFER; } - dsi->pll_clk = devm_clk_get(dev, "pll_clk"); - if (IS_ERR(dsi->pll_clk)) { - dev_info(dev, "failed to get dsi pll input clock\n"); - return PTR_ERR(dsi->pll_clk); + dsi->sclk_clk = devm_clk_get(dev, "sclk_mipi"); + if (IS_ERR(dsi->sclk_clk)) { + dsi->sclk_clk = devm_clk_get(dev, OLD_SCLK_MIPI_CLK_NAME); + if (IS_ERR(dsi->sclk_clk)) { + dev_info(dev, "failed to get dsi sclk clock\n"); + eturn PTR_ERR(dsi->sclk_clk); + } } dsi->bus_clk = devm_clk_get(dev, "bus_clk"); -- 2.20.1