From: John Madieu <john.madieu.xa@xxxxxxxxxxxxxx> The RZ/G3E system controller has various registers that control or report some properties specific to individual IPs. The regmap is registered as a syscon device to allow these IP drivers to access the registers through the regmap API. As other RZ SoCs might have custom read/write callbacks or max-offsets, add register a custom regmap configuration. Signed-off-by: John Madieu <john.madieu.xa@xxxxxxxxxxxxxx> [claudiu.beznea: - s/rzg3e_sysc_regmap/rzv2h_sysc_regmap in RZ/V2H sysc file - do not check the match->data validity in rz_sysc_probe() as it is always valid - register the regmap if data->regmap_cfg is valid] Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> --- Changes in v3: - none, this patch is new, it was picked from John after he addressed the review comments received at [1]; - I adjusted as specified in the SoB area, and included it here as it is the base for the signal support presented in the next commits [1] https://lore.kernel.org/all/20250330214945.185725-2-john.madieu.xa@xxxxxxxxxxxxxx/ drivers/soc/renesas/Kconfig | 1 + drivers/soc/renesas/r9a08g045-sysc.c | 10 ++++++++++ drivers/soc/renesas/r9a09g047-sys.c | 10 ++++++++++ drivers/soc/renesas/r9a09g057-sys.c | 10 ++++++++++ drivers/soc/renesas/rz-sysc.c | 17 ++++++++++++++++- drivers/soc/renesas/rz-sysc.h | 3 +++ 6 files changed, 50 insertions(+), 1 deletion(-) diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig index fbc3b69d21a7..f3b7546092d6 100644 --- a/drivers/soc/renesas/Kconfig +++ b/drivers/soc/renesas/Kconfig @@ -437,6 +437,7 @@ config RST_RCAR config SYSC_RZ bool "System controller for RZ SoCs" if COMPILE_TEST + select MFD_SYSCON config SYSC_R9A08G045 bool "Renesas RZ/G3S System controller support" if COMPILE_TEST diff --git a/drivers/soc/renesas/r9a08g045-sysc.c b/drivers/soc/renesas/r9a08g045-sysc.c index f4db1431e036..0ef6df77e25f 100644 --- a/drivers/soc/renesas/r9a08g045-sysc.c +++ b/drivers/soc/renesas/r9a08g045-sysc.c @@ -18,6 +18,16 @@ static const struct rz_sysc_soc_id_init_data rzg3s_sysc_soc_id_init_data __initc .specific_id_mask = GENMASK(27, 0), }; +static const struct regmap_config rzg3s_sysc_regmap __initconst = { + .name = "rzg3s_sysc_regs", + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, + .max_register = 0xe20, +}; + const struct rz_sysc_init_data rzg3s_sysc_init_data __initconst = { .soc_id_init_data = &rzg3s_sysc_soc_id_init_data, + .regmap_cfg = &rzg3s_sysc_regmap, }; diff --git a/drivers/soc/renesas/r9a09g047-sys.c b/drivers/soc/renesas/r9a09g047-sys.c index cd2eb7782cfe..a3acf6dd2867 100644 --- a/drivers/soc/renesas/r9a09g047-sys.c +++ b/drivers/soc/renesas/r9a09g047-sys.c @@ -62,6 +62,16 @@ static const struct rz_sysc_soc_id_init_data rzg3e_sys_soc_id_init_data __initco .print_id = rzg3e_sys_print_id, }; +static const struct regmap_config rzg3e_sysc_regmap __initconst = { + .name = "rzg3e_sysc_regs", + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, + .max_register = 0x170c, +}; + const struct rz_sysc_init_data rzg3e_sys_init_data = { .soc_id_init_data = &rzg3e_sys_soc_id_init_data, + .regmap_cfg = &rzg3e_sysc_regmap, }; diff --git a/drivers/soc/renesas/r9a09g057-sys.c b/drivers/soc/renesas/r9a09g057-sys.c index 4c21cc29edbc..c26821636dce 100644 --- a/drivers/soc/renesas/r9a09g057-sys.c +++ b/drivers/soc/renesas/r9a09g057-sys.c @@ -62,6 +62,16 @@ static const struct rz_sysc_soc_id_init_data rzv2h_sys_soc_id_init_data __initco .print_id = rzv2h_sys_print_id, }; +static const struct regmap_config rzv2h_sysc_regmap __initconst = { + .name = "rzv2h_sysc_regs", + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, + .max_register = 0x170c, +}; + const struct rz_sysc_init_data rzv2h_sys_init_data = { .soc_id_init_data = &rzv2h_sys_soc_id_init_data, + .regmap_cfg = &rzv2h_sysc_regmap, }; diff --git a/drivers/soc/renesas/rz-sysc.c b/drivers/soc/renesas/rz-sysc.c index ffa65fb4dade..70556a2f55e6 100644 --- a/drivers/soc/renesas/rz-sysc.c +++ b/drivers/soc/renesas/rz-sysc.c @@ -6,8 +6,10 @@ */ #include <linux/io.h> +#include <linux/mfd/syscon.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/sys_soc.h> #include "rz-sysc.h" @@ -100,14 +102,19 @@ MODULE_DEVICE_TABLE(of, rz_sysc_match); static int rz_sysc_probe(struct platform_device *pdev) { + const struct rz_sysc_init_data *data; const struct of_device_id *match; struct device *dev = &pdev->dev; + struct regmap *regmap; struct rz_sysc *sysc; + int ret; match = of_match_node(rz_sysc_match, dev->of_node); if (!match) return -ENODEV; + data = match->data; + sysc = devm_kzalloc(dev, sizeof(*sysc), GFP_KERNEL); if (!sysc) return -ENOMEM; @@ -117,7 +124,15 @@ static int rz_sysc_probe(struct platform_device *pdev) return PTR_ERR(sysc->base); sysc->dev = dev; - return rz_sysc_soc_init(sysc, match); + ret = rz_sysc_soc_init(sysc, match); + if (ret || !data->regmap_cfg) + return ret; + + regmap = devm_regmap_init_mmio(dev, sysc->base, data->regmap_cfg); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return of_syscon_register_regmap(dev->of_node, regmap); } static struct platform_driver rz_sysc_driver = { diff --git a/drivers/soc/renesas/rz-sysc.h b/drivers/soc/renesas/rz-sysc.h index 56bc047a1bff..447008140634 100644 --- a/drivers/soc/renesas/rz-sysc.h +++ b/drivers/soc/renesas/rz-sysc.h @@ -9,6 +9,7 @@ #define __SOC_RENESAS_RZ_SYSC_H__ #include <linux/device.h> +#include <linux/regmap.h> #include <linux/sys_soc.h> #include <linux/types.h> @@ -34,9 +35,11 @@ struct rz_sysc_soc_id_init_data { /** * struct rz_sysc_init_data - RZ SYSC initialization data * @soc_id_init_data: RZ SYSC SoC ID initialization data + * @regmap_cfg: SoC-specific regmap config */ struct rz_sysc_init_data { const struct rz_sysc_soc_id_init_data *soc_id_init_data; + const struct regmap_config *regmap_cfg; }; extern const struct rz_sysc_init_data rzg3e_sys_init_data; -- 2.43.0
