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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 <jernej.skrabec@gmail.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220815041248.53268-10-samuel@sholland.org
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
This commit is contained in:
Samuel Holland 2022-08-14 23:12:46 -05:00 committed by Jernej Skrabec
parent ee07b9056e
commit dd2ae2ecb0
1 changed files with 16 additions and 14 deletions
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30
drivers/soc/sunxi/sunxi_sram.c
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@ -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);