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Message-ID: <ZuEm0t7HgA5dxe0n@atmark-techno.com>
Date: Wed, 11 Sep 2024 14:12:50 +0900
From: Dominique Martinet <dominique.martinet@...ark-techno.com>
To: Adam Ford <aford173@...il.com>
Cc: linux-phy@...ts.infradead.org, linux-imx@....com, festevam@...il.com,
	frieder.schrempf@...tron.de, aford@...conembedded.com,
	Sandor.yu@....com, Marco Felsch <m.felsch@...gutronix.de>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Lucas Stach <l.stach@...gutronix.de>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V7 1/5] phy: freescale: fsl-samsung-hdmi: Replace
 register defines with macro

Adam Ford wrote on Tue, Sep 10, 2024 at 08:28:07PM -0500:
> There are 47 registers defined as PHY_REG_xx were xx goes from 00 to
> 47.  Simplify this by replacing them all with a macro which is passed
> the register number to return the proper register offset.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> Reviewed-by: Marco Felsch <m.felsch@...gutronix.de>
> Reviewed-by: Frieder Schrempf <frieder.schrempf@...tron.de>
> Tested-by: Frieder Schrempf <frieder.schrempf@...tron.de>

Reviewed-by: Dominique Martinet <dominique.martinet@...ark-techno.com>
Tested-by: Dominique Martinet <dominique.martinet@...ark-techno.com>

> ---
>  drivers/phy/freescale/phy-fsl-samsung-hdmi.c | 133 ++++++-------------
>  1 file changed, 43 insertions(+), 90 deletions(-)
> 
> diff --git a/drivers/phy/freescale/phy-fsl-samsung-hdmi.c b/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
> index 9048cdc760c2..acea7008aefc 100644
> --- a/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
> +++ b/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
> @@ -14,76 +14,29 @@
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  
> -#define PHY_REG_00		0x00
> -#define PHY_REG_01		0x04
> -#define PHY_REG_02		0x08
> -#define PHY_REG_08		0x20
> -#define PHY_REG_09		0x24
> -#define PHY_REG_10		0x28
> -#define PHY_REG_11		0x2c
> -
> -#define PHY_REG_12		0x30
> -#define  REG12_CK_DIV_MASK	GENMASK(5, 4)
> -
> -#define PHY_REG_13		0x34
> -#define  REG13_TG_CODE_LOW_MASK	GENMASK(7, 0)
> -
> -#define PHY_REG_14		0x38
> -#define  REG14_TOL_MASK		GENMASK(7, 4)
> -#define  REG14_RP_CODE_MASK	GENMASK(3, 1)
> -#define  REG14_TG_CODE_HIGH_MASK	GENMASK(0, 0)
> -
> -#define PHY_REG_15		0x3c
> -#define PHY_REG_16		0x40
> -#define PHY_REG_17		0x44
> -#define PHY_REG_18		0x48
> -#define PHY_REG_19		0x4c
> -#define PHY_REG_20		0x50
> -
> -#define PHY_REG_21		0x54
> -#define  REG21_SEL_TX_CK_INV	BIT(7)
> -#define  REG21_PMS_S_MASK	GENMASK(3, 0)
> -
> -#define PHY_REG_22		0x58
> -#define PHY_REG_23		0x5c
> -#define PHY_REG_24		0x60
> -#define PHY_REG_25		0x64
> -#define PHY_REG_26		0x68
> -#define PHY_REG_27		0x6c
> -#define PHY_REG_28		0x70
> -#define PHY_REG_29		0x74
> -#define PHY_REG_30		0x78
> -#define PHY_REG_31		0x7c
> -#define PHY_REG_32		0x80
> +#define PHY_REG(reg)		(reg * 4)
>  
> +#define REG12_CK_DIV_MASK	GENMASK(5, 4)
> +
> +#define REG13_TG_CODE_LOW_MASK	GENMASK(7, 0)
> +
> +#define REG14_TOL_MASK		GENMASK(7, 4)
> +#define REG14_RP_CODE_MASK	GENMASK(3, 1)
> +#define REG14_TG_CODE_HIGH_MASK	GENMASK(0, 0)
> +
> +#define REG21_SEL_TX_CK_INV	BIT(7)
> +#define REG21_PMS_S_MASK	GENMASK(3, 0)
>  /*
>   * REG33 does not match the ref manual. According to Sandor Yu from NXP,
>   * "There is a doc issue on the i.MX8MP latest RM"
>   * REG33 is being used per guidance from Sandor
>   */
> +#define REG33_MODE_SET_DONE	BIT(7)
> +#define REG33_FIX_DA		BIT(1)
>  
> -#define PHY_REG_33		0x84
> -#define  REG33_MODE_SET_DONE	BIT(7)
> -#define  REG33_FIX_DA		BIT(1)
> -
> -#define PHY_REG_34		0x88
> -#define  REG34_PHY_READY	BIT(7)
> -#define  REG34_PLL_LOCK		BIT(6)
> -#define  REG34_PHY_CLK_READY	BIT(5)
> -
> -#define PHY_REG_35		0x8c
> -#define PHY_REG_36		0x90
> -#define PHY_REG_37		0x94
> -#define PHY_REG_38		0x98
> -#define PHY_REG_39		0x9c
> -#define PHY_REG_40		0xa0
> -#define PHY_REG_41		0xa4
> -#define PHY_REG_42		0xa8
> -#define PHY_REG_43		0xac
> -#define PHY_REG_44		0xb0
> -#define PHY_REG_45		0xb4
> -#define PHY_REG_46		0xb8
> -#define PHY_REG_47		0xbc
> +#define REG34_PHY_READY	BIT(7)
> +#define REG34_PLL_LOCK		BIT(6)
> +#define REG34_PHY_CLK_READY	BIT(5)
>  
>  #define PHY_PLL_DIV_REGS_NUM 6
>  
> @@ -369,29 +322,29 @@ struct reg_settings {
>  };
>  
>  static const struct reg_settings common_phy_cfg[] = {
> -	{ PHY_REG_00, 0x00 }, { PHY_REG_01, 0xd1 },
> -	{ PHY_REG_08, 0x4f }, { PHY_REG_09, 0x30 },
> -	{ PHY_REG_10, 0x33 }, { PHY_REG_11, 0x65 },
> +	{ PHY_REG(0), 0x00 }, { PHY_REG(1), 0xd1 },
> +	{ PHY_REG(8), 0x4f }, { PHY_REG(9), 0x30 },
> +	{ PHY_REG(10), 0x33 }, { PHY_REG(11), 0x65 },
>  	/* REG12 pixclk specific */
>  	/* REG13 pixclk specific */
>  	/* REG14 pixclk specific */
> -	{ PHY_REG_15, 0x80 }, { PHY_REG_16, 0x6c },
> -	{ PHY_REG_17, 0xf2 }, { PHY_REG_18, 0x67 },
> -	{ PHY_REG_19, 0x00 }, { PHY_REG_20, 0x10 },
> +	{ PHY_REG(15), 0x80 }, { PHY_REG(16), 0x6c },
> +	{ PHY_REG(17), 0xf2 }, { PHY_REG(18), 0x67 },
> +	{ PHY_REG(19), 0x00 }, { PHY_REG(20), 0x10 },
>  	/* REG21 pixclk specific */
> -	{ PHY_REG_22, 0x30 }, { PHY_REG_23, 0x32 },
> -	{ PHY_REG_24, 0x60 }, { PHY_REG_25, 0x8f },
> -	{ PHY_REG_26, 0x00 }, { PHY_REG_27, 0x00 },
> -	{ PHY_REG_28, 0x08 }, { PHY_REG_29, 0x00 },
> -	{ PHY_REG_30, 0x00 }, { PHY_REG_31, 0x00 },
> -	{ PHY_REG_32, 0x00 }, { PHY_REG_33, 0x80 },
> -	{ PHY_REG_34, 0x00 }, { PHY_REG_35, 0x00 },
> -	{ PHY_REG_36, 0x00 }, { PHY_REG_37, 0x00 },
> -	{ PHY_REG_38, 0x00 }, { PHY_REG_39, 0x00 },
> -	{ PHY_REG_40, 0x00 }, { PHY_REG_41, 0xe0 },
> -	{ PHY_REG_42, 0x83 }, { PHY_REG_43, 0x0f },
> -	{ PHY_REG_44, 0x3E }, { PHY_REG_45, 0xf8 },
> -	{ PHY_REG_46, 0x00 }, { PHY_REG_47, 0x00 }
> +	{ PHY_REG(22), 0x30 }, { PHY_REG(23), 0x32 },
> +	{ PHY_REG(24), 0x60 }, { PHY_REG(25), 0x8f },
> +	{ PHY_REG(26), 0x00 }, { PHY_REG(27), 0x00 },
> +	{ PHY_REG(28), 0x08 }, { PHY_REG(29), 0x00 },
> +	{ PHY_REG(30), 0x00 }, { PHY_REG(31), 0x00 },
> +	{ PHY_REG(32), 0x00 }, { PHY_REG(33), 0x80 },
> +	{ PHY_REG(34), 0x00 }, { PHY_REG(35), 0x00 },
> +	{ PHY_REG(36), 0x00 }, { PHY_REG(37), 0x00 },
> +	{ PHY_REG(38), 0x00 }, { PHY_REG(39), 0x00 },
> +	{ PHY_REG(40), 0x00 }, { PHY_REG(41), 0xe0 },
> +	{ PHY_REG(42), 0x83 }, { PHY_REG(43), 0x0f },
> +	{ PHY_REG(44), 0x3E }, { PHY_REG(45), 0xf8 },
> +	{ PHY_REG(46), 0x00 }, { PHY_REG(47), 0x00 }
>  };
>  
>  struct fsl_samsung_hdmi_phy {
> @@ -442,7 +395,7 @@ fsl_samsung_hdmi_phy_configure_pixclk(struct fsl_samsung_hdmi_phy *phy,
>  	}
>  
>  	writeb(REG21_SEL_TX_CK_INV | FIELD_PREP(REG21_PMS_S_MASK, div),
> -	       phy->regs + PHY_REG_21);
> +	       phy->regs + PHY_REG(21));
>  }
>  
>  static void
> @@ -469,7 +422,7 @@ fsl_samsung_hdmi_phy_configure_pll_lock_det(struct fsl_samsung_hdmi_phy *phy,
>  		break;
>  	}
>  
> -	writeb(FIELD_PREP(REG12_CK_DIV_MASK, ilog2(div)), phy->regs + PHY_REG_12);
> +	writeb(FIELD_PREP(REG12_CK_DIV_MASK, ilog2(div)), phy->regs + PHY_REG(12));
>  
>  	/*
>  	 * Calculation for the frequency lock detector target code (fld_tg_code)
> @@ -489,11 +442,11 @@ fsl_samsung_hdmi_phy_configure_pll_lock_det(struct fsl_samsung_hdmi_phy *phy,
>  
>  	/* FLD_TOL and FLD_RP_CODE taken from downstream driver */
>  	writeb(FIELD_PREP(REG13_TG_CODE_LOW_MASK, fld_tg_code),
> -	       phy->regs + PHY_REG_13);
> +	       phy->regs + PHY_REG(13));
>  	writeb(FIELD_PREP(REG14_TOL_MASK, 2) |
>  	       FIELD_PREP(REG14_RP_CODE_MASK, 2) |
>  	       FIELD_PREP(REG14_TG_CODE_HIGH_MASK, fld_tg_code >> 8),
> -	       phy->regs + PHY_REG_14);
> +	       phy->regs + PHY_REG(14));
>  }
>  
>  static int fsl_samsung_hdmi_phy_configure(struct fsl_samsung_hdmi_phy *phy,
> @@ -503,7 +456,7 @@ static int fsl_samsung_hdmi_phy_configure(struct fsl_samsung_hdmi_phy *phy,
>  	u8 val;
>  
>  	/* HDMI PHY init */
> -	writeb(REG33_FIX_DA, phy->regs + PHY_REG_33);
> +	writeb(REG33_FIX_DA, phy->regs + PHY_REG(33));
>  
>  	/* common PHY registers */
>  	for (i = 0; i < ARRAY_SIZE(common_phy_cfg); i++)
> @@ -511,14 +464,14 @@ static int fsl_samsung_hdmi_phy_configure(struct fsl_samsung_hdmi_phy *phy,
>  
>  	/* set individual PLL registers PHY_REG2 ... PHY_REG7 */
>  	for (i = 0; i < PHY_PLL_DIV_REGS_NUM; i++)
> -		writeb(cfg->pll_div_regs[i], phy->regs + PHY_REG_02 + i * 4);
> +		writeb(cfg->pll_div_regs[i], phy->regs + PHY_REG(2) + i * 4);
>  
>  	fsl_samsung_hdmi_phy_configure_pixclk(phy, cfg);
>  	fsl_samsung_hdmi_phy_configure_pll_lock_det(phy, cfg);
>  
> -	writeb(REG33_FIX_DA | REG33_MODE_SET_DONE, phy->regs + PHY_REG_33);
> +	writeb(REG33_FIX_DA | REG33_MODE_SET_DONE, phy->regs + PHY_REG(33));
>  
> -	ret = readb_poll_timeout(phy->regs + PHY_REG_34, val,
> +	ret = readb_poll_timeout(phy->regs + PHY_REG(34), val,
>  				 val & REG34_PLL_LOCK, 50, 20000);
>  	if (ret)
>  		dev_err(phy->dev, "PLL failed to lock\n");

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