power: pmic: rk817: support rk817 pmic

The RK817 is a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
    - Regulators(4*BUCKs, 1* BOOST, 9*LDOs, 1*SWITCH)
    - RTC
    - Clocking

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

1 files changed, 81 insertions, 3 deletions

diff --git a/drivers/power/pmic/rk8xx.c b/drivers/power/pmic/rk8xx.c
index 00c8a2e091..df0bf83a05 100644
--- a/drivers/power/pmic/rk8xx.c
+++ b/drivers/power/pmic/rk8xx.c
@@ -10,6 +10,13 @@
 #include <power/rk8xx_pmic.h>
 #include <power/pmic.h>
 
+static struct reg_data rk817_init_reg[] = {
+/* enable the under-voltage protection,
+ * the under-voltage protection will shutdown the LDO3 and reset the PMIC
+ */
+	{ RK817_BUCK4_CMIN, 0x60, 0x60},
+};
+
 static const struct pmic_child_info pmic_children_info[] = {
 	{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
 	{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
@@ -76,13 +83,83 @@ static int rk8xx_bind(struct udevice *dev)
 static int rk8xx_probe(struct udevice *dev)
 {
 	struct rk8xx_priv *priv = dev_get_priv(dev);
-	uint8_t msb, lsb;
+	struct reg_data *init_data = NULL;
+	int init_data_num = 0;
+	int ret = 0, i, show_variant;
+	u8 msb, lsb, id_msb, id_lsb;
+	u8 on_source = 0, off_source = 0;
+	u8 power_en0, power_en1, power_en2, power_en3;
+	u8 value;
 
 	/* read Chip variant */
-	rk8xx_read(dev, ID_MSB, &msb, 1);
-	rk8xx_read(dev, ID_LSB, &lsb, 1);
+	if (device_is_compatible(dev, "rockchip,rk817")) {
+		id_msb = RK817_ID_MSB;
+		id_lsb = RK817_ID_LSB;
+	} else {
+		id_msb = ID_MSB;
+		id_lsb = ID_LSB;
+	}
+
+	ret = rk8xx_read(dev, id_msb, &msb, 1);
+	if (ret)
+		return ret;
+	ret = rk8xx_read(dev, id_lsb, &lsb, 1);
+	if (ret)
+		return ret;
 
 	priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
+	show_variant = priv->variant;
+	switch (priv->variant) {
+	case RK808_ID:
+		show_variant = 0x808;	/* RK808 hardware ID is 0 */
+		break;
+	case RK805_ID:
+	case RK816_ID:
+	case RK818_ID:
+		on_source = RK8XX_ON_SOURCE;
+		off_source = RK8XX_OFF_SOURCE;
+		break;
+	case RK817_ID:
+		on_source = RK817_ON_SOURCE;
+		off_source = RK817_OFF_SOURCE;
+		init_data = rk817_init_reg;
+		init_data_num = ARRAY_SIZE(rk817_init_reg);
+		power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
+		power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
+		power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
+		power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
+
+		value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
+		pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
+		value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
+		pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
+		break;
+	default:
+		printf("Unknown PMIC: RK%x!!\n", priv->variant);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < init_data_num; i++) {
+		ret = pmic_clrsetbits(dev,
+				      init_data[i].reg,
+				      init_data[i].mask,
+				      init_data[i].val);
+		if (ret < 0) {
+			printf("%s: i2c set reg 0x%x failed, ret=%d\n",
+			       __func__, init_data[i].reg, ret);
+		}
+
+		debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
+		      pmic_reg_read(dev, init_data[i].reg));
+	}
+
+	printf("PMIC:  RK%x ", show_variant);
+
+	if (on_source && off_source)
+		printf("(on=0x%02x, off=0x%02x)",
+		       pmic_reg_read(dev, on_source),
+		       pmic_reg_read(dev, off_source));
+	printf("\n");
 
 	return 0;
 }
@@ -97,6 +174,7 @@ static const struct udevice_id rk8xx_ids[] = {
 	{ .compatible = "rockchip,rk805" },
 	{ .compatible = "rockchip,rk808" },
 	{ .compatible = "rockchip,rk816" },
+	{ .compatible = "rockchip,rk817" },
 	{ .compatible = "rockchip,rk818" },
 	{ }
 };