[PATCH 02/34] sunxi: mmc: remove usage of struct sunxi_ccm_reg
Jernej Škrabec
jernej.skrabec at gmail.com
Sun Mar 23 13:04:18 CET 2025
Dne nedelja, 23. marec 2025 ob 12:35:12 Srednjeevropski standardni čas je Andre Przywara napisal(a):
> The Allwinner MMC code uses a complex C struct, modelling the clock
> device's register frame. We rely on sharing the member names across all
> Allwinner SoCs, which is fragile.
>
> Drop the usage of the struct in the MMC code, by using #define'd
> register names and their offset, and then adding those names to the base
> pointer. This requires to define those offsets for all SoCs, but since we
> only use between four and six clock registers in the MMC code, this is
> easily done.
>
> This removes one common user of the clock register struct.
>
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
> ---
> arch/arm/include/asm/arch-sunxi/clock_sun4i.h | 6 ++++++
> .../include/asm/arch-sunxi/clock_sun50i_h6.h | 4 ++++
> arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 7 +++++++
> .../include/asm/arch-sunxi/clock_sun8i_a83t.h | 7 +++++++
> arch/arm/include/asm/arch-sunxi/clock_sun9i.h | 7 +++++++
> drivers/mmc/sunxi_mmc.c | 20 +++++++++----------
> 6 files changed, 41 insertions(+), 10 deletions(-)
>
> diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
> index 2cec91cb20e..00bdd5f938d 100644
> --- a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
> +++ b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
> @@ -10,6 +10,12 @@
> #ifndef _SUNXI_CLOCK_SUN4I_H
> #define _SUNXI_CLOCK_SUN4I_H
>
> +#define CCU_AHB_GATE0 0x60
> +#define CCU_MMC0_CLK_CFG 0x88
> +#define CCU_MMC1_CLK_CFG 0x8c
> +#define CCU_MMC2_CLK_CFG 0x90
> +#define CCU_MMC3_CLK_CFG 0x94
> +
> struct sunxi_ccm_reg {
> u32 pll1_cfg; /* 0x00 pll1 control */
> u32 pll1_tun; /* 0x04 pll1 tuning */
> diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun50i_h6.h b/arch/arm/include/asm/arch-sunxi/clock_sun50i_h6.h
> index a485e00f1f3..655f562c2af 100644
> --- a/arch/arm/include/asm/arch-sunxi/clock_sun50i_h6.h
> +++ b/arch/arm/include/asm/arch-sunxi/clock_sun50i_h6.h
> @@ -22,6 +22,10 @@
> #define CCU_H6_APB1_CFG 0x520
> #define CCU_H6_APB2_CFG 0x524
> #define CCU_H6_MBUS_CFG 0x540
> +#define CCU_MMC0_CLK_CFG 0x830
> +#define CCU_MMC1_CLK_CFG 0x834
> +#define CCU_MMC2_CLK_CFG 0x838
> +#define CCU_H6_MMC_GATE_RESET 0x84c
> #define CCU_H6_UART_GATE_RESET 0x90c
> #define CCU_H6_I2C_GATE_RESET 0x91c
>
> diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
> index 7fcf340db69..28c3faccbbc 100644
> --- a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
> +++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
> @@ -10,6 +10,13 @@
> #ifndef _SUNXI_CLOCK_SUN6I_H
> #define _SUNXI_CLOCK_SUN6I_H
>
> +#define CCU_AHB_GATE0 0x060
> +#define CCU_MMC0_CLK_CFG 0x088
> +#define CCU_MMC1_CLK_CFG 0x08c
> +#define CCU_MMC2_CLK_CFG 0x090
> +#define CCU_MMC3_CLK_CFG 0x094
> +#define CCU_AHB_RESET0_CFG 0x2c0
> +
> struct sunxi_ccm_reg {
> u32 pll1_cfg; /* 0x00 pll1 control */
> u32 reserved0;
> diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun8i_a83t.h b/arch/arm/include/asm/arch-sunxi/clock_sun8i_a83t.h
> index 35ca0491ac9..5ad2163926a 100644
> --- a/arch/arm/include/asm/arch-sunxi/clock_sun8i_a83t.h
> +++ b/arch/arm/include/asm/arch-sunxi/clock_sun8i_a83t.h
> @@ -13,6 +13,13 @@
> #ifndef _SUNXI_CLOCK_SUN8I_A83T_H
> #define _SUNXI_CLOCK_SUN8I_A83T_H
>
> +#define CCU_AHB_GATE0 0x060
> +#define CCU_MMC0_CLK_CFG 0x088
> +#define CCU_MMC1_CLK_CFG 0x08c
> +#define CCU_MMC2_CLK_CFG 0x090
> +#define CCU_MMC3_CLK_CFG 0x094
> +#define CCU_AHB_RESET0_CFG 0x2c0
> +
> struct sunxi_ccm_reg {
> u32 pll1_c0_cfg; /* 0x00 c1cpu# pll control */
> u32 pll1_c1_cfg; /* 0x04 c1cpu# pll control */
> diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun9i.h b/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
> index 006f7761fc6..8d696e533f8 100644
> --- a/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
> +++ b/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
> @@ -12,6 +12,13 @@
> #include <linux/bitops.h>
> #endif
>
> +#define CCU_MMC0_CLK_CFG 0x410
> +#define CCU_MMC1_CLK_CFG 0x414
> +#define CCU_MMC2_CLK_CFG 0x418
> +#define CCU_MMC3_CLK_CFG 0x41c
> +#define CCU_AHB_GATE0 0x580
> +#define CCU_AHB_RESET0_CFG 0x5a0
> +
> struct sunxi_ccm_reg {
> u32 pll1_c0_cfg; /* 0x00 c0cpu# pll configuration */
> u32 pll2_c1_cfg; /* 0x04 c1cpu# pll configuration */
> diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
> index 0b56d1405be..432be66c632 100644
> --- a/drivers/mmc/sunxi_mmc.c
> +++ b/drivers/mmc/sunxi_mmc.c
> @@ -451,29 +451,29 @@ struct sunxi_mmc_priv mmc_host[4];
> static int mmc_resource_init(int sdc_no)
> {
> struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
> - struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
> + void *ccm = (void *)SUNXI_CCM_BASE;
>
> debug("init mmc %d resource\n", sdc_no);
>
> switch (sdc_no) {
> case 0:
> priv->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
> - priv->mclkreg = &ccm->sd0_clk_cfg;
> + priv->mclkreg = ccm + CCU_MMC0_CLK_CFG;
> break;
> case 1:
> priv->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
> - priv->mclkreg = &ccm->sd1_clk_cfg;
> + priv->mclkreg = ccm + CCU_MMC1_CLK_CFG;
> break;
> #ifdef SUNXI_MMC2_BASE
> case 2:
> priv->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
> - priv->mclkreg = &ccm->sd2_clk_cfg;
> + priv->mclkreg = ccm + CCU_MMC2_CLK_CFG;
> break;
> #endif
> #ifdef SUNXI_MMC3_BASE
> case 3:
> priv->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
> - priv->mclkreg = &ccm->sd3_clk_cfg;
> + priv->mclkreg = ccm + CCU_MMC3_CLK_CFG;
> break;
> #endif
> default:
> @@ -520,7 +520,7 @@ static const struct mmc_ops sunxi_mmc_ops = {
>
> struct mmc *sunxi_mmc_init(int sdc_no)
> {
> - struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
> + void *ccm = (void *)SUNXI_CCM_BASE;
> struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
> struct mmc_config *cfg = &priv->cfg;
> int ret;
> @@ -549,11 +549,11 @@ struct mmc *sunxi_mmc_init(int sdc_no)
> /* config ahb clock */
> debug("init mmc %d clock and io\n", sdc_no);
> #if !defined(CONFIG_SUN50I_GEN_H6) && !defined(CONFIG_SUNXI_GEN_NCAT2)
> - setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));
> + setbits_le32(ccm + CCU_AHB_GATE0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));
>
> #ifdef CONFIG_SUNXI_GEN_SUN6I
> /* unassert reset */
> - setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
> + setbits_le32(ccm + CCU_AHB_RESET0_CFG, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
> #endif
> #if defined(CONFIG_MACH_SUN9I)
> /* sun9i has a mmc-common module, also set the gate and reset there */
> @@ -561,9 +561,9 @@ struct mmc *sunxi_mmc_init(int sdc_no)
> SUNXI_MMC_COMMON_BASE + 4 * sdc_no);
> #endif
> #else /* CONFIG_SUN50I_GEN_H6 */
> - setbits_le32(&ccm->sd_gate_reset, 1 << sdc_no);
> + setbits_le32(ccm + CCU_H6_MMC_GATE_RESET, 1 << sdc_no);
> /* unassert reset */
> - setbits_le32(&ccm->sd_gate_reset, 1 << (RESET_SHIFT + sdc_no));
> + setbits_le32(ccm + CCU_H6_MMC_GATE_RESET, 1 << (RESET_SHIFT + sdc_no));
I guess this is in SPL path, so DT can't be used here? Anyway, can you use
some little more generic macro name? I assume there could be other generations
which can use same concept.
Best regards,
Jernej
> #endif
> ret = mmc_set_mod_clk(priv, 24000000);
> if (ret)
>
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