Commit dd2ae2ec authored by Samuel Holland's avatar Samuel Holland Committed by Jernej Skrabec
Browse files

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: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: default avatarSamuel Holland <samuel@sholland.org>
Reviewed-by: default avatarHeiko Stuebner <heiko@sntech.de>
Tested-by: default avatarHeiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220815041248.53268-10-samuel@sholland.org


Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
parent ee07b905

drivers/soc/sunxi/sunxi_sram.c

+16 −14
Original line number Diff line number Diff line
@@ -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 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);