Only GMAC register is allowed to be written, read access to registers is not restricted.
Export a regmap of the CCU. Signed-off-by: Priit Laes <[email protected]> --- drivers/clk/sunxi-ng/ccu-sun4i-a10.c | 31 ++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c index 839e9d5a1cff..cba51c2c7eba 100644 --- a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c +++ b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c @@ -1426,6 +1426,30 @@ static const struct sunxi_ccu_desc sun7i_a20_ccu_desc = { .num_resets = ARRAY_SIZE(sunxi_a10_a20_ccu_resets), }; +/* + * Add regmap for the GMAC driver (dwmac-sun8i) to allow access to + * GMAC configuration register. + */ + +#define SUN7I_A20_GMAC_CFG_REG 0x164 +static bool sun7i_a20_ccu_regmap_accessible_reg(struct device *dev, + unsigned int reg) +{ + if (reg == SUN7I_A20_GMAC_CFG_REG) + return true; + return false; +} + +static struct regmap_config sun7i_a20_ccu_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x1f4, /* clk_out_b */ + + .readable_reg = sun7i_a20_ccu_regmap_accessible_reg, + .writeable_reg = sun7i_a20_ccu_regmap_accessible_reg, +}; + static void bootstrap_clocks(void __iomem *reg) { u32 val; @@ -1474,6 +1498,7 @@ static int sun4i_a10_ccu_probe(struct platform_device *pdev) static int sun7i_a20_ccu_probe(struct platform_device *pdev) { + struct regmap *regmap; struct resource *res; void __iomem *reg; @@ -1484,6 +1509,12 @@ static int sun7i_a20_ccu_probe(struct platform_device *pdev) bootstrap_clocks(reg); + regmap = devm_regmap_init_mmio(&pdev->dev, reg, + &sun7i_a20_ccu_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return sunxi_ccu_probe(pdev->dev.of_node, reg, &sun7i_a20_ccu_desc); } -- 2.25.2 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/20200417221730.555954-3-plaes%40plaes.org.
