[PATCH v1 05/17] drm/mediatek: hdmi: use a syscon/regmap instead of iomem

[Guillaume Ranquet]

To prepare support for newer chips that need to share their address
range with a dedicated ddc driver, move to a syscon.

Signed-off-by: Guillaume Ranquet <granquet at baylibre.com>

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 3196189429bc..5cd05d4fe1a9 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -172,7 +172,7 @@ struct mtk_hdmi {
 	u32 ibias_up;
 	struct regmap *sys_regmap;
 	unsigned int sys_offset;
-	void __iomem *regs;
+	struct regmap *regs;
 	enum hdmi_colorspace csp;
 	struct hdmi_audio_param aud_param;
 	bool audio_enable;
@@ -188,44 +188,29 @@ static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
 	return container_of(b, struct mtk_hdmi, bridge);
 }
 
-static u32 mtk_hdmi_read(struct mtk_hdmi *hdmi, u32 offset)
+static int mtk_hdmi_read(struct mtk_hdmi *hdmi, u32 offset, u32 *val)
 {
-	return readl(hdmi->regs + offset);
+	return regmap_read(hdmi->regs, offset, val);
 }
 
 static void mtk_hdmi_write(struct mtk_hdmi *hdmi, u32 offset, u32 val)
 {
-	writel(val, hdmi->regs + offset);
+	regmap_write(hdmi->regs, offset, val);
 }
 
 static void mtk_hdmi_clear_bits(struct mtk_hdmi *hdmi, u32 offset, u32 bits)
 {
-	void __iomem *reg = hdmi->regs + offset;
-	u32 tmp;
-
-	tmp = readl(reg);
-	tmp &= ~bits;
-	writel(tmp, reg);
+	regmap_clear_bits(hdmi->regs, offset, bits);
 }
 
 static void mtk_hdmi_set_bits(struct mtk_hdmi *hdmi, u32 offset, u32 bits)
 {
-	void __iomem *reg = hdmi->regs + offset;
-	u32 tmp;
-
-	tmp = readl(reg);
-	tmp |= bits;
-	writel(tmp, reg);
+	regmap_set_bits(hdmi->regs, offset, bits);
 }
 
 static void mtk_hdmi_mask(struct mtk_hdmi *hdmi, u32 offset, u32 val, u32 mask)
 {
-	void __iomem *reg = hdmi->regs + offset;
-	u32 tmp;
-
-	tmp = readl(reg);
-	tmp = (tmp & ~mask) | (val & mask);
-	writel(tmp, reg);
+	regmap_update_bits(hdmi->regs, offset, mask, val);
 }
 
 static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
@@ -474,7 +459,7 @@ static void mtk_hdmi_hw_aud_set_i2s_fmt(struct mtk_hdmi *hdmi,
 {
 	u32 val;
 
-	val = mtk_hdmi_read(hdmi, GRL_CFG0);
+	mtk_hdmi_read(hdmi, GRL_CFG0, &val);
 	val &= ~(CFG0_W_LENGTH_MASK | CFG0_I2S_MODE_MASK);
 
 	switch (i2s_fmt) {
@@ -566,7 +551,7 @@ static void mtk_hdmi_hw_aud_set_input_type(struct mtk_hdmi *hdmi,
 {
 	u32 val;
 
-	val = mtk_hdmi_read(hdmi, GRL_CFG1);
+	mtk_hdmi_read(hdmi, GRL_CFG1, &val);
 	if (input_type == HDMI_AUD_INPUT_I2S &&
 	    (val & CFG1_SPDIF) == CFG1_SPDIF) {
 		val &= ~CFG1_SPDIF;
@@ -597,7 +582,7 @@ static void mtk_hdmi_hw_aud_src_reenable(struct mtk_hdmi *hdmi)
 {
 	u32 val;
 
-	val = mtk_hdmi_read(hdmi, GRL_MIX_CTRL);
+	mtk_hdmi_read(hdmi, GRL_MIX_CTRL, &val);
 	if (val & MIX_CTRL_SRC_EN) {
 		val &= ~MIX_CTRL_SRC_EN;
 		mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
@@ -611,7 +596,7 @@ static void mtk_hdmi_hw_aud_src_disable(struct mtk_hdmi *hdmi)
 {
 	u32 val;
 
-	val = mtk_hdmi_read(hdmi, GRL_MIX_CTRL);
+	mtk_hdmi_read(hdmi, GRL_MIX_CTRL, &val);
 	val &= ~MIX_CTRL_SRC_EN;
 	mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
 	mtk_hdmi_write(hdmi, GRL_SHIFT_L1, 0x00);
@@ -622,7 +607,7 @@ static void mtk_hdmi_hw_aud_set_mclk(struct mtk_hdmi *hdmi,
 {
 	u32 val;
 
-	val = mtk_hdmi_read(hdmi, GRL_CFG5);
+	mtk_hdmi_read(hdmi, GRL_CFG5, &val);
 	val &= CFG5_CD_RATIO_MASK;
 
 	switch (mclk) {
@@ -1428,7 +1413,6 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 	struct device_node *cec_np, *remote, *i2c_np;
 	struct platform_device *cec_pdev;
 	struct regmap *regmap;
-	struct resource *mem;
 	int ret;
 
 	ret = mtk_hdmi_get_all_clk(hdmi, np);
@@ -1474,8 +1458,7 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 	}
 	hdmi->sys_regmap = regmap;
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	hdmi->regs = devm_ioremap_resource(dev, mem);
+	hdmi->regs = syscon_node_to_regmap(dev->of_node);
 	if (IS_ERR(hdmi->regs)) {
 		ret = PTR_ERR(hdmi->regs);
 		goto put_device;

-- 
b4 0.10.0-dev