78 lines
2.3 KiB
Diff
78 lines
2.3 KiB
Diff
diff --git a/drivers/soc/rockchip/io-domain.c b/drivers/soc/rockchip/io-domain.c
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index 9df513d12..83f5354ba 100644
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--- a/drivers/soc/rockchip/io-domain.c
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+++ b/drivers/soc/rockchip/io-domain.c
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@@ -39,6 +39,10 @@
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#define RK3288_SOC_CON2_FLASH0 BIT(7)
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#define RK3288_SOC_FLASH_SUPPLY_NUM 2
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+#define RK3308_SOC_CON0 0x300
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+#define RK3308_SOC_CON0_VCCIO3 BIT(8)
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+#define RK3308_SOC_VCCIO3_SUPPLY_NUM 3
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+
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#define RK3328_SOC_CON4 0x410
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#define RK3328_SOC_CON4_VCCIO2 BIT(7)
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#define RK3328_SOC_VCCIO2_SUPPLY_NUM 1
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@@ -229,6 +233,30 @@ static void rk3288_iodomain_init(struct rockchip_iodomain *iod)
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dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
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}
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+static void rk3308_iodomain_init(struct rockchip_iodomain *iod)
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+{
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+ int ret;
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+ u32 val;
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+
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+ /* if no vccio3 supply we should leave things alone */
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+ if (!iod->supplies[RK3308_SOC_VCCIO3_SUPPLY_NUM].reg)
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+ return;
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+
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+ /*
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+ * vccio3 iodomain voltage should be determined by GPIO4 input state
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+ * RockPI-S uses this to drive the SDIO interface at 50Mhz
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+ * (otherwise SDIO clock will be limited to 10Mhz)
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+ *
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+ * Note that setting vccio4 [rather than vccio3] is observed to reduce
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+ * the rise time of SDIO-clk from 30ns to 5ns.
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+ * The CON0_VCCIO3 control bit appears to influence vccio4.
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+ */
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+ val = RK3308_SOC_CON0_VCCIO3 | (RK3308_SOC_CON0_VCCIO3 << 16);
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+ ret = regmap_write(iod->grf, RK3308_SOC_CON0, val);
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+ if (ret < 0)
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+ dev_warn(iod->dev, "couldn't update vccio3 vsel ctrl\n");
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+}
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+
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static void rk3328_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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@@ -376,6 +404,19 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
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.init = rk3288_iodomain_init,
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};
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+static const struct rockchip_iodomain_soc_data soc_data_rk3308 = {
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+ .grf_offset = 0x300,
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+ .supply_names = {
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+ "vccio0",
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+ "vccio1",
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+ "vccio2",
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+ "vccio3",
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+ "vccio4",
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+ "vccio5",
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+ },
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+ .init = rk3308_iodomain_init,
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+};
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+
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static const struct rockchip_iodomain_soc_data soc_data_rk3328 = {
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.grf_offset = 0x410,
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.supply_names = {
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@@ -512,6 +553,10 @@ static const struct of_device_id rockchip_iodomain_match[] = {
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.compatible = "rockchip,rk3288-io-voltage-domain",
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.data = &soc_data_rk3288
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},
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+ {
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+ .compatible = "rockchip,rk3308-io-voltage-domain",
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+ .data = &soc_data_rk3308
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+ },
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{
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.compatible = "rockchip,rk3328-io-voltage-domain",
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.data = &soc_data_rk3328
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