[RFC] ARM: at91: sama5d3: Migrate to MFD-based SMC driver

[Alexander Shiyan]

Hi Ahmad, any news on this?

вт, 24 июн. 2025 г. в 12:15, Alexander Shiyan <eagle.alexander923 at gmail.com>:
>
> This replaces the low-level SMC driver implementation with the
> MFD-based driver for SAMA5D3 platforms.
>
> Signed-off-by: Alexander Shiyan <eagle.alexander923 at gmail.com>
> ---
>  arch/arm/boards/sama5d3_xplained/board.c | 46 ------------------------
>  arch/arm/mach-at91/Kconfig               |  1 -
>  arch/arm/mach-at91/sam9_smc.c            |  5 +--
>  3 files changed, 1 insertion(+), 51 deletions(-)
>
> diff --git a/arch/arm/boards/sama5d3_xplained/board.c b/arch/arm/boards/sama5d3_xplained/board.c
> index 4d908e6b9f..3ee3f2166e 100644
> --- a/arch/arm/boards/sama5d3_xplained/board.c
> +++ b/arch/arm/boards/sama5d3_xplained/board.c
> @@ -3,60 +3,14 @@
>  #include <common.h>
>  #include <init.h>
>  #include <envfs.h>
> -#include <mach/at91/at91sam9_smc.h>
> -#include <mach/at91/hardware.h>
> -#include <linux/clk.h>
> -
> -static struct sam9_smc_config sama5d3_xplained_nand_smc_config = {
> -       .ncs_read_setup         = 1,
> -       .nrd_setup              = 2,
> -       .ncs_write_setup        = 1,
> -       .nwe_setup              = 2,
> -
> -       .ncs_read_pulse         = 5,
> -       .nrd_pulse              = 3,
> -       .ncs_write_pulse        = 5,
> -       .nwe_pulse              = 3,
> -
> -       .read_cycle             = 8,
> -       .write_cycle            = 8,
> -
> -       .mode                   = AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
> -                                 AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_DBW_8,
> -       .tdf_cycles             = 3,
> -
> -       .tclr                   = 3,
> -       .tadl                   = 10,
> -       .tar                    = 3,
> -       .ocms                   = 0,
> -       .trr                    = 4,
> -       .twb                    = 5,
> -       .rbnsel                 = 3,
> -       .nfsel                  = 1
> -};
>
>  static int sama5d3_xplained_probe(struct device *dev)
>  {
> -       struct clk *clk;
> -
>         barebox_set_hostname("sama5d3_xplained");
>
>         if (IS_ENABLED(CONFIG_DEFAULT_ENVIRONMENT_GENERIC))
>                 defaultenv_append_directory(defaultenv_sama5d3_xplained);
>
> -       add_generic_device("at91sam9-smc", DEVICE_ID_SINGLE, NULL,
> -                          SAMA5D3_BASE_HSMC + 0x600, 0xa0,
> -                          IORESOURCE_MEM, NULL);
> -
> -       clk = clk_lookup("hsmc_clk");
> -       if (IS_ERR(clk))
> -               dev_warn(dev, "couldn't get hsmc_clk: %pe\n", clk);
> -
> -       clk_enable(clk);
> -
> -       /* configure chip-select 3 (NAND) */
> -       sama5_smc_configure(0, 3, &sama5d3_xplained_nand_smc_config);
> -
>         return 0;
>  }
>
> diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
> index db79ad2d26..22ab99d9c8 100644
> --- a/arch/arm/mach-at91/Kconfig
> +++ b/arch/arm/mach-at91/Kconfig
> @@ -107,7 +107,6 @@ config SOC_SAMA5D2
>  config SOC_SAMA5D3
>         bool
>         select SOC_SAMA5
> -       select AT91SAM9_SMC
>         select CLOCKSOURCE_ATMEL_PIT
>         select HAVE_AT91_SMD
>         select HAVE_AT91_USB_CLK
> diff --git a/arch/arm/mach-at91/sam9_smc.c b/arch/arm/mach-at91/sam9_smc.c
> index 6c9e169a8e..66b30694ce 100644
> --- a/arch/arm/mach-at91/sam9_smc.c
> +++ b/arch/arm/mach-at91/sam9_smc.c
> @@ -14,8 +14,7 @@
>
>  #define AT91_SAM9_SMC_CS_STRIDE                0x10
>  #define AT91_SAMA5_SMC_CS_STRIDE       0x14
> -#define AT91_SMC_CS_STRIDE     ((at91_soc_initdata.type == AT91_SOC_SAMA5D3 \
> -                                || at91_soc_initdata.type == AT91_SOC_SAMA5D4) \
> +#define AT91_SMC_CS_STRIDE     ((at91_soc_initdata.type == AT91_SOC_SAMA5D4) \
>                                  ? AT91_SAMA5_SMC_CS_STRIDE : AT91_SAM9_SMC_CS_STRIDE)
>  #define AT91_SMC_CS(id, n)     (smc_base_addr[id] + ((n) * AT91_SMC_CS_STRIDE))
>
> @@ -27,7 +26,6 @@ static void sam9_smc_cs_write_mode(void __iomem *base,
>         void __iomem *mode_reg;
>
>         switch (at91_soc_initdata.type) {
> -       case AT91_SOC_SAMA5D3:
>         case AT91_SOC_SAMA5D4:
>                 mode_reg = base + AT91_SAMA5_SMC_MODE;
>                 break;
> @@ -101,7 +99,6 @@ static void sam9_smc_cs_read_mode(void __iomem *base,
>         void __iomem *mode_reg;
>
>         switch (at91_soc_initdata.type) {
> -       case AT91_SOC_SAMA5D3:
>         case AT91_SOC_SAMA5D4:
>                 mode_reg = base + AT91_SAMA5_SMC_MODE;
>                 break;
> --
> 2.39.1
>