Re: [PATCH 1/3] phy: mediatek: phy-mtk-mipi-dsi: Switch to regmap for mmio access

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On Mon, 2022-01-03 at 15:53 +0100, AngeloGioacchino Del Regno wrote:
> Switch to using the generic regmap API instead of calls to
> readl/writel
> for MMIO register access, removing custom crafted
> update/set/clear_bits
> functions and also allowing us to reduce code size.
It seems make the driver more complex and may consume more cpu time. we
prefer to use readl/writel here.

> 
> Signed-off-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@xxxxxxxxxxxxx>
> ---
>  .../phy/mediatek/phy-mtk-mipi-dsi-mt8173.c    | 45 ++++++-------
>  .../phy/mediatek/phy-mtk-mipi-dsi-mt8183.c    | 63 ++++++++++-------
> --
>  drivers/phy/mediatek/phy-mtk-mipi-dsi.c       | 43 +++++--------
>  drivers/phy/mediatek/phy-mtk-mipi-dsi.h       |  6 +-
>  4 files changed, 72 insertions(+), 85 deletions(-)
> 
> diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8173.c
> b/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8173.c
> index 7a847954594f..95a0d9a3cca7 100644
> --- a/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8173.c
> +++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8173.c
> @@ -4,6 +4,7 @@
>   * Author: jitao.shi <jitao.shi@xxxxxxxxxxxx>
>   */
>  
> +#include <linux/regmap.h>
>  #include "phy-mtk-mipi-dsi.h"
>  
>  #define MIPITX_DSI_CON		0x00
> @@ -145,7 +146,7 @@ static int mtk_mipi_tx_pll_prepare(struct clk_hw
> *hw)
>  		return -EINVAL;
>  	}
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_BG_CON,
>  				RG_DSI_VOUT_MSK |
>  				RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN,
>  				(4 << 20) | (4 << 17) | (4 << 14) |
> @@ -154,22 +155,22 @@ static int mtk_mipi_tx_pll_prepare(struct
> clk_hw *hw)
>  
>  	usleep_range(30, 100);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_TOP_CON,
>  				RG_DSI_LNT_IMP_CAL_CODE |
> RG_DSI_LNT_HS_BIAS_EN,
>  				(8 << 4) | RG_DSI_LNT_HS_BIAS_EN);
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON,
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_DSI_CON,
>  			     RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_PLL_PWR,
>  				RG_DSI_MPPLL_SDM_PWR_ON |
>  				RG_DSI_MPPLL_SDM_ISO_EN,
>  				RG_DSI_MPPLL_SDM_PWR_ON);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON0,
>  			       RG_DSI_MPPLL_PLL_EN);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON0,
>  				RG_DSI_MPPLL_TXDIV0 |
> RG_DSI_MPPLL_TXDIV1 |
>  				RG_DSI_MPPLL_PREDIV,
>  				(txdiv0 << 3) | (txdiv1 << 5));
> @@ -184,19 +185,19 @@ static int mtk_mipi_tx_pll_prepare(struct
> clk_hw *hw)
>  	 */
>  	pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24,
>  		      26000000);
> -	writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2);
> +	regmap_write(mipi_tx->regmap, MIPITX_DSI_PLL_CON2, pcw);
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON1,
>  			     RG_DSI_MPPLL_SDM_FRA_EN);
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> RG_DSI_MPPLL_PLL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON0,
> RG_DSI_MPPLL_PLL_EN);
>  
>  	usleep_range(20, 100);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON1,
>  			       RG_DSI_MPPLL_SDM_SSC_EN);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_PLL_TOP,
>  				RG_DSI_MPPLL_PRESERVE,
>  				mipi_tx->driver_data->mppll_preserve);
>  
> @@ -209,27 +210,27 @@ static void mtk_mipi_tx_pll_unprepare(struct
> clk_hw *hw)
>  
>  	dev_dbg(mipi_tx->dev, "unprepare\n");
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON0,
>  			       RG_DSI_MPPLL_PLL_EN);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_PLL_TOP,
>  				RG_DSI_MPPLL_PRESERVE, 0);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_DSI_PLL_PWR,
>  				RG_DSI_MPPLL_SDM_ISO_EN |
>  				RG_DSI_MPPLL_SDM_PWR_ON,
>  				RG_DSI_MPPLL_SDM_ISO_EN);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_TOP_CON,
>  			       RG_DSI_LNT_HS_BIAS_EN);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_CON,
>  			       RG_DSI_CKG_LDOOUT_EN |
> RG_DSI_LDOCORE_EN);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_BG_CON,
>  			       RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_PLL_CON0,
>  			       RG_DSI_MPPLL_DIV_MSK);
>  }
>  
> @@ -254,9 +255,9 @@ static void mtk_mipi_tx_power_on_signal(struct
> phy *phy)
>  
>  	for (reg = MIPITX_DSI_CLOCK_LANE;
>  	     reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
> -		mtk_mipi_tx_set_bits(mipi_tx, reg,
> RG_DSI_LNTx_LDOOUT_EN);
> +		regmap_set_bits(mipi_tx->regmap, reg,
> RG_DSI_LNTx_LDOOUT_EN);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_DSI_TOP_CON,
>  			       RG_DSI_PAD_TIE_LOW_EN);
>  }
>  
> @@ -265,12 +266,12 @@ static void mtk_mipi_tx_power_off_signal(struct
> phy *phy)
>  	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
>  	u32 reg;
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_DSI_TOP_CON,
>  			     RG_DSI_PAD_TIE_LOW_EN);
>  
>  	for (reg = MIPITX_DSI_CLOCK_LANE;
>  	     reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
> -		mtk_mipi_tx_clear_bits(mipi_tx, reg,
> RG_DSI_LNTx_LDOOUT_EN);
> +		regmap_clear_bits(mipi_tx->regmap, reg,
> RG_DSI_LNTx_LDOOUT_EN);
>  }
>  
>  const struct mtk_mipitx_data mt2701_mipitx_data = {
> diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8183.c
> b/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8183.c
> index 99108426d57c..01b59527669e 100644
> --- a/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8183.c
> +++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8183.c
> @@ -4,6 +4,7 @@
>   * Author: jitao.shi <jitao.shi@xxxxxxxxxxxx>
>   */
>  
> +#include <linux/regmap.h>
>  #include "phy-mtk-mipi-dsi.h"
>  
>  #define MIPITX_LANE_CON		0x000c
> @@ -70,17 +71,17 @@ static int mtk_mipi_tx_pll_enable(struct clk_hw
> *hw)
>  		return -EINVAL;
>  	}
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON4,
> RG_DSI_PLL_IBIAS);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_PLL_CON4,
> RG_DSI_PLL_IBIAS);
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_PWR_ON);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1,
> RG_DSI_PLL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_PWR_ON);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_PLL_CON1,
> RG_DSI_PLL_EN);
>  	udelay(1);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_ISO_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_ISO_EN);
>  	pcw = div_u64(((u64)mipi_tx->data_rate * txdiv) << 24,
> 26000000);
> -	writel(pcw, mipi_tx->regs + MIPITX_PLL_CON0);
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_PLL_CON1,
> RG_DSI_PLL_POSDIV,
> +	regmap_write(mipi_tx->regmap, MIPITX_PLL_CON0, pcw);
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_PLL_CON1,
> RG_DSI_PLL_POSDIV,
>  				txdiv0 << 8);
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_PLL_CON1,
> RG_DSI_PLL_EN);
>  
>  	return 0;
>  }
> @@ -89,10 +90,10 @@ static void mtk_mipi_tx_pll_disable(struct clk_hw
> *hw)
>  {
>  	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
>  
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1,
> RG_DSI_PLL_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_PLL_CON1,
> RG_DSI_PLL_EN);
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_ISO_EN);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_PWR_ON);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_ISO_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_PLL_PWR,
> AD_DSI_PLL_SDM_PWR_ON);
>  }
>  
>  static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned
> long rate,
> @@ -121,7 +122,7 @@ static void
> mtk_mipi_tx_config_calibration_data(struct mtk_mipi_tx *mipi_tx)
>  			mipi_tx->rt_code[i] |= 0x10 << 5;
>  
>  		for (j = 0; j < 10; j++)
> -			mtk_mipi_tx_update_bits(mipi_tx,
> +			regmap_update_bits(mipi_tx->regmap,
>  				MIPITX_D2P_RTCODE * (i + 1) + j * 4,
>  				1, mipi_tx->rt_code[i] >> j & 1);
>  	}
> @@ -132,26 +133,26 @@ static void mtk_mipi_tx_power_on_signal(struct
> phy *phy)
>  	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
>  
>  	/* BG_LPF_EN / BG_CORE_EN */
> -	writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,
> -	       mipi_tx->regs + MIPITX_LANE_CON);
> +	regmap_write(mipi_tx->regmap, MIPITX_LANE_CON,
> +		    (RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN));
>  	usleep_range(30, 100);
> -	writel(RG_DSI_BG_CORE_EN | RG_DSI_BG_LPF_EN,
> -	       mipi_tx->regs + MIPITX_LANE_CON);
> +	regmap_write(mipi_tx->regmap, MIPITX_LANE_CON,
> +		    (RG_DSI_BG_LPF_EN | RG_DSI_BG_CORE_EN));
>  
>  	/* Switch OFF each Lane */
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D0_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D1_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D2_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D3_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_CK_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_D0_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_D1_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_D2_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_D3_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_clear_bits(mipi_tx->regmap, MIPITX_CK_SW_CTL_EN,
> DSI_SW_CTL_EN);
>  
> -	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_VOLTAGE_SEL,
> +	regmap_update_bits(mipi_tx->regmap, MIPITX_VOLTAGE_SEL,
>  				RG_DSI_HSTX_LDO_REF_SEL,
>  				(mipi_tx->mipitx_drive - 3000) / 200 <<
> 6);
>  
>  	mtk_mipi_tx_config_calibration_data(mipi_tx);
>  
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_CKMODE_EN,
> DSI_CK_CKMODE_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_CK_CKMODE_EN,
> DSI_CK_CKMODE_EN);
>  }
>  
>  static void mtk_mipi_tx_power_off_signal(struct phy *phy)
> @@ -159,15 +160,15 @@ static void mtk_mipi_tx_power_off_signal(struct
> phy *phy)
>  	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
>  
>  	/* Switch ON each Lane */
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D0_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D1_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D2_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D3_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_SW_CTL_EN,
> DSI_SW_CTL_EN);
> -
> -	writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,
> -	       mipi_tx->regs + MIPITX_LANE_CON);
> -	writel(RG_DSI_PAD_TIEL_SEL, mipi_tx->regs + MIPITX_LANE_CON);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_D0_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_D1_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_D2_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_D3_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +	regmap_set_bits(mipi_tx->regmap, MIPITX_CK_SW_CTL_EN,
> DSI_SW_CTL_EN);
> +
> +	regmap_write(mipi_tx->regmap, MIPITX_LANE_CON,
> +		    (RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN));
> +	regmap_write(mipi_tx->regmap, MIPITX_LANE_CON,
> RG_DSI_PAD_TIEL_SEL);
>  }
>  
>  const struct mtk_mipitx_data mt8183_mipitx_data = {
> diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
> b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
> index 28ad9403c441..51b1b1d4ad38 100644
> --- a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
> +++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2015 MediaTek Inc.
>   */
>  
> +#include <linux/regmap.h>
>  #include "phy-mtk-mipi-dsi.h"
>  
>  inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw
> *hw)
> @@ -10,30 +11,6 @@ inline struct mtk_mipi_tx
> *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw)
>  	return container_of(hw, struct mtk_mipi_tx, pll_hw);
>  }
>  
> -void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> -			    u32 bits)
> -{
> -	u32 temp = readl(mipi_tx->regs + offset);
> -
> -	writel(temp & ~bits, mipi_tx->regs + offset);
> -}
> -
> -void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> -			  u32 bits)
> -{
> -	u32 temp = readl(mipi_tx->regs + offset);
> -
> -	writel(temp | bits, mipi_tx->regs + offset);
> -}
> -
> -void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32
> offset,
> -			     u32 mask, u32 data)
> -{
> -	u32 temp = readl(mipi_tx->regs + offset);
> -
> -	writel((temp & ~mask) | (data & mask), mipi_tx->regs + offset);
> -}
> -
>  int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
>  			     unsigned long parent_rate)
>  {
> @@ -126,6 +103,13 @@ static void
> mtk_mipi_tx_get_calibration_datal(struct mtk_mipi_tx *mipi_tx)
>  	kfree(buf);
>  }
>  
> +static const struct regmap_config mtk_mipi_tx_regmap_config = {
> +	.reg_bits = 32,
> +	.reg_stride = 4,
> +	.val_bits = 32,
> +	.disable_locking = true,
> +};
> +
>  static int mtk_mipi_tx_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -139,6 +123,7 @@ static int mtk_mipi_tx_probe(struct
> platform_device *pdev)
>  	};
>  	struct phy *phy;
>  	struct phy_provider *phy_provider;
> +	void __iomem *regs;
>  	int ret;
>  
>  	mipi_tx = devm_kzalloc(dev, sizeof(*mipi_tx), GFP_KERNEL);
> @@ -147,9 +132,13 @@ static int mtk_mipi_tx_probe(struct
> platform_device *pdev)
>  
>  	mipi_tx->driver_data = of_device_get_match_data(dev);
>  
> -	mipi_tx->regs = devm_platform_ioremap_resource(pdev, 0);
> -	if (IS_ERR(mipi_tx->regs))
> -		return PTR_ERR(mipi_tx->regs);
> +	regs = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(regs))
> +		return PTR_ERR(regs);
> +
> +	mipi_tx->regmap = devm_regmap_init_mmio(dev, regs,
> &mtk_mipi_tx_regmap_config);
> +	if (IS_ERR(mipi_tx->regmap))
> +		return PTR_ERR(mipi_tx->regmap);
>  
>  	ref_clk = devm_clk_get(dev, NULL);
>  	if (IS_ERR(ref_clk)) {
> diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.h
> b/drivers/phy/mediatek/phy-mtk-mipi-dsi.h
> index c76f07c3fdeb..8d32e9027a15 100644
> --- a/drivers/phy/mediatek/phy-mtk-mipi-dsi.h
> +++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.h
> @@ -27,7 +27,7 @@ struct mtk_mipitx_data {
>  
>  struct mtk_mipi_tx {
>  	struct device *dev;
> -	void __iomem *regs;
> +	struct regmap *regmap;
>  	u32 data_rate;
>  	u32 mipitx_drive;
>  	u32 rt_code[5];
> @@ -37,10 +37,6 @@ struct mtk_mipi_tx {
>  };
>  
>  struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw);
> -void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> u32 bits);
> -void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> u32 bits);
> -void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32
> offset, u32 mask,
> -			     u32 data);
>  int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
>  			     unsigned long parent_rate);
>  unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,




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