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

[Ahmad Fatoum]

On 14.07.25 22:00, Alexander Shiyan wrote:
> Hi Ahmad, any news on this?

Sorry, haven't come around to yet, but will try to soon.

> 
> 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
>>
> 


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