Get the ref clock of the PHY from the device tree instead of hardcoding its name and rate. Use default values if the ref clock is not specified.
Signed-off-by: Matthias Kaehlcke <m...@chromium.org> --- Changes in v3: - use default name and rate if the ref clock is not specified in the DT - store vco_ref_clk_name instead of vco_ref_clk - fixed check for EPROBE_DEFER - renamed VCO_REF_CLK_RATE to VCO_REF_CLK_DEFAULT_RATE Changes in v2: - patch added to the series --- .../gpu/drm/msm/dsi/pll/dsi_pll_28nm_8960.c | 28 +++++++++++++++---- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm_8960.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm_8960.c index 49008451085b8..3af678d3317f6 100644 --- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm_8960.c +++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm_8960.c @@ -47,9 +47,9 @@ #define NUM_PROVIDED_CLKS 2 -#define VCO_REF_CLK_RATE 27000000 -#define VCO_MIN_RATE 600000000 -#define VCO_MAX_RATE 1200000000 +#define VCO_REF_CLK_DEFAULT_RATE 27000000 +#define VCO_MIN_RATE 600000000 +#define VCO_MAX_RATE 1200000000 #define DSI_BYTE_PLL_CLK 0 #define DSI_PIXEL_PLL_CLK 1 @@ -75,6 +75,8 @@ struct dsi_pll_28nm { struct platform_device *pdev; void __iomem *mmio; + const char *vco_ref_clk_name; + /* custom byte clock divider */ struct clk_bytediv *bytediv; @@ -125,7 +127,10 @@ static int dsi_pll_28nm_clk_set_rate(struct clk_hw *hw, unsigned long rate, DBG("rate=%lu, parent's=%lu", rate, parent_rate); temp = rate / 10; - val = VCO_REF_CLK_RATE / 10; + if (parent_rate) + val = parent_rate / 10; + else + val = VCO_REF_CLK_DEFAULT_RATE / 10; fb_divider = (temp * VCO_PREF_DIV_RATIO) / val; fb_divider = fb_divider / 2 - 1; pll_write(base + REG_DSI_28nm_8960_PHY_PLL_CTRL_1, @@ -410,7 +415,7 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm) { char *clk_name, *parent_name, *vco_name; struct clk_init_data vco_init = { - .parent_names = (const char *[]){ "pxo" }, + .parent_names = &pll_28nm->vco_ref_clk_name, .num_parents = 1, .flags = CLK_IGNORE_UNUSED, .ops = &clk_ops_dsi_pll_28nm_vco, @@ -494,6 +499,7 @@ struct msm_dsi_pll *msm_dsi_pll_28nm_8960_init(struct platform_device *pdev, { struct dsi_pll_28nm *pll_28nm; struct msm_dsi_pll *pll; + struct clk *vco_ref_clk; int ret; if (!pdev) @@ -506,6 +512,18 @@ struct msm_dsi_pll *msm_dsi_pll_28nm_8960_init(struct platform_device *pdev, pll_28nm->pdev = pdev; pll_28nm->id = id + 1; + vco_ref_clk = devm_clk_get(&pdev->dev, "ref"); + if (!IS_ERR(vco_ref_clk)) { + pll_28nm->vco_ref_clk_name = __clk_get_name(vco_ref_clk); + } else { + ret = PTR_ERR(vco_ref_clk); + if (ret == -EPROBE_DEFER) + return ERR_PTR(ret); + + dev_warn(&pdev->dev, "'ref' clock is not specified, using default name\n"); + pll_28nm->vco_ref_clk_name = "pxo"; + } + pll_28nm->mmio = msm_ioremap(pdev, "dsi_pll", "DSI_PLL"); if (IS_ERR_OR_NULL(pll_28nm->mmio)) { dev_err(&pdev->dev, "%s: failed to map pll base\n", __func__); -- 2.20.0.rc1.387.gf8505762e3-goog _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel