From dd2ae2ecb0b98c7b196fc44ad07010093b7cd3cc Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Sun, 14 Aug 2022 23:12:46 -0500 Subject: [PATCH] soc: sunxi: sram: Export the LDO control register Some newer Allwinner SoCs contain internal LDOs managed by a register in the system control MMIO space. Export this from the regmap in addtion to the EMAC register. Use generic names now that the regmap is no longer EMAC-specific. Acked-by: Jernej Skrabec Signed-off-by: Samuel Holland Reviewed-by: Heiko Stuebner Tested-by: Heiko Stuebner Link: https://lore.kernel.org/r/20220815041248.53268-10-samuel@sholland.org Signed-off-by: Jernej Skrabec --- drivers/soc/sunxi/sunxi_sram.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index 7c6fb17..7e8dab0 100644 --- a/drivers/soc/sunxi/sunxi_sram.c +++ b/drivers/soc/sunxi/sunxi_sram.c @@ -283,6 +283,7 @@ EXPORT_SYMBOL(sunxi_sram_release); struct sunxi_sramc_variant { int num_emac_clocks; + bool has_ldo_ctrl; }; static const struct sunxi_sramc_variant sun4i_a10_sramc_variant = { @@ -302,25 +303,28 @@ static const struct sunxi_sramc_variant sun50i_h616_sramc_variant = { }; #define SUNXI_SRAM_EMAC_CLOCK_REG 0x30 +#define SUNXI_SYS_LDO_CTRL_REG 0x150 + static bool sunxi_sram_regmap_accessible_reg(struct device *dev, unsigned int reg) { const struct sunxi_sramc_variant *variant = dev_get_drvdata(dev); - if (reg < SUNXI_SRAM_EMAC_CLOCK_REG) - return false; - if (reg > SUNXI_SRAM_EMAC_CLOCK_REG + variant->num_emac_clocks * 4) - return false; + if (reg >= SUNXI_SRAM_EMAC_CLOCK_REG && + reg < SUNXI_SRAM_EMAC_CLOCK_REG + variant->num_emac_clocks * 4) + return true; + if (reg == SUNXI_SYS_LDO_CTRL_REG && variant->has_ldo_ctrl) + return true; - return true; + return false; } -static struct regmap_config sunxi_sram_emac_clock_regmap = { +static struct regmap_config sunxi_sram_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, /* last defined register */ - .max_register = SUNXI_SRAM_EMAC_CLOCK_REG + 4, + .max_register = SUNXI_SYS_LDO_CTRL_REG, /* other devices have no business accessing other registers */ .readable_reg = sunxi_sram_regmap_accessible_reg, .writeable_reg = sunxi_sram_regmap_accessible_reg, @@ -328,9 +332,9 @@ static struct regmap_config sunxi_sram_emac_clock_regmap = { static int __init sunxi_sram_probe(struct platform_device *pdev) { - struct regmap *emac_clock; const struct sunxi_sramc_variant *variant; struct device *dev = &pdev->dev; + struct regmap *regmap; sram_dev = &pdev->dev; @@ -344,12 +348,10 @@ static int __init sunxi_sram_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); - if (variant->num_emac_clocks > 0) { - emac_clock = devm_regmap_init_mmio(&pdev->dev, base, - &sunxi_sram_emac_clock_regmap); - - if (IS_ERR(emac_clock)) - return PTR_ERR(emac_clock); + if (variant->num_emac_clocks || variant->has_ldo_ctrl) { + regmap = devm_regmap_init_mmio(dev, base, &sunxi_sram_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); } of_platform_populate(dev->of_node, NULL, NULL, dev); -- 2.7.4