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Message-Id: <20260112124351.17707-3-chenjh@rock-chips.com>
Date: Mon, 12 Jan 2026 20:43:50 +0800
From: Joseph Chen <chenjh@...k-chips.com>
To: Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Lee Jones <lee@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Rob Herring <robh@...nel.org>
Cc: Heiko Stuebner <heiko@...ech.de>,
devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
Joseph Chen <chenjh@...k-chips.com>
Subject: [PATCH v3 2/3] mfd: rk8xx: Add RK801 support
The RK801 is a Power Management IC (PMIC) for multimedia
and handheld devices. It contains the following components:
- 4 BUCK
- 2 LDO
- 1 SWITCH
Signed-off-by: Joseph Chen <chenjh@...k-chips.com>
---
drivers/mfd/Kconfig | 6 +-
drivers/mfd/rk8xx-core.c | 81 ++++++++++++++++++++++++++
drivers/mfd/rk8xx-i2c.c | 33 ++++++++++-
include/linux/mfd/rk808.h | 118 ++++++++++++++++++++++++++++++++++++++
4 files changed, 234 insertions(+), 4 deletions(-)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 6cec1858947..2f11f95343e 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1355,15 +1355,15 @@ config MFD_RK8XX
select MFD_CORE
config MFD_RK8XX_I2C
- tristate "Rockchip RK805/RK808/RK809/RK816/RK817/RK818 Power Management Chip"
+ tristate "Rockchip RK8xx Power Management Chips"
depends on I2C && OF
select MFD_CORE
select REGMAP_I2C
select REGMAP_IRQ
select MFD_RK8XX
help
- If you say yes here you get support for the RK805, RK808, RK809,
- RK816, RK817 and RK818 Power Management chips.
+ If you say yes here you get support for the RK801, RK805, RK808,
+ RK809, RK816, RK817 and RK818 Power Management chips.
This driver provides common support for accessing the device
through I2C interface. The device supports multiple sub-devices
including interrupts, RTC, LDO & DCDC regulators, and onkey.
diff --git a/drivers/mfd/rk8xx-core.c b/drivers/mfd/rk8xx-core.c
index def4587fdfb..3dcf6abfda7 100644
--- a/drivers/mfd/rk8xx-core.c
+++ b/drivers/mfd/rk8xx-core.c
@@ -37,6 +37,11 @@ static const struct resource rk817_rtc_resources[] = {
DEFINE_RES_IRQ(RK817_IRQ_RTC_ALARM),
};
+static const struct resource rk801_key_resources[] = {
+ DEFINE_RES_IRQ(RK801_IRQ_PWRON_FALL),
+ DEFINE_RES_IRQ(RK801_IRQ_PWRON_RISE),
+};
+
static const struct resource rk805_key_resources[] = {
DEFINE_RES_IRQ(RK805_IRQ_PWRON_RISE),
DEFINE_RES_IRQ(RK805_IRQ_PWRON_FALL),
@@ -57,6 +62,14 @@ static const struct resource rk817_charger_resources[] = {
DEFINE_RES_IRQ(RK817_IRQ_PLUG_OUT),
};
+static const struct mfd_cell rk801s[] = {
+ { .name = "rk808-regulator", },
+ { .name = "rk805-pwrkey",
+ .num_resources = ARRAY_SIZE(rk801_key_resources),
+ .resources = &rk801_key_resources[0],
+ },
+};
+
static const struct mfd_cell rk805s[] = {
{ .name = "rk808-clkout", },
{ .name = "rk808-regulator", },
@@ -139,6 +152,15 @@ static const struct mfd_cell rk818s[] = {
},
};
+static const struct rk808_reg_data rk801_pre_init_reg[] = {
+ { RK801_SLEEP_CFG_REG, RK801_SLEEP_FUN_MSK, RK801_NONE_FUN },
+ { RK801_SYS_CFG2_REG, RK801_RST_MSK, RK801_RST_RESTART_REG_RESETB },
+ { RK801_INT_CONFIG_REG, RK801_INT_POL_MSK, RK801_INT_ACT_L },
+ { RK801_POWER_FPWM_EN_REG, RK801_PLDO_HRDEC_EN, RK801_PLDO_HRDEC_EN },
+ { RK801_BUCK_DEBUG5_REG, MASK_ALL, 0x54 },
+ { RK801_CON_BACK1_REG, MASK_ALL, 0x18 },
+};
+
static const struct rk808_reg_data rk805_pre_init_reg[] = {
{RK805_BUCK1_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
RK805_BUCK1_2_ILMAX_4000MA},
@@ -284,6 +306,37 @@ static const struct rk808_reg_data rk818_pre_init_reg[] = {
VB_LO_SEL_3500MV },
};
+static const struct regmap_irq rk801_irqs[] = {
+ [RK801_IRQ_PWRON_FALL] = {
+ .mask = RK801_IRQ_PWRON_FALL_MSK,
+ .reg_offset = 0,
+ },
+ [RK801_IRQ_PWRON_RISE] = {
+ .mask = RK801_IRQ_PWRON_RISE_MSK,
+ .reg_offset = 0,
+ },
+ [RK801_IRQ_PWRON] = {
+ .mask = RK801_IRQ_PWRON_MSK,
+ .reg_offset = 0,
+ },
+ [RK801_IRQ_PWRON_LP] = {
+ .mask = RK801_IRQ_PWRON_LP_MSK,
+ .reg_offset = 0,
+ },
+ [RK801_IRQ_HOTDIE] = {
+ .mask = RK801_IRQ_HOTDIE_MSK,
+ .reg_offset = 0,
+ },
+ [RK801_IRQ_VDC_RISE] = {
+ .mask = RK801_IRQ_VDC_RISE_MSK,
+ .reg_offset = 0,
+ },
+ [RK801_IRQ_VDC_FALL] = {
+ .mask = RK801_IRQ_VDC_FALL_MSK,
+ .reg_offset = 0,
+ },
+};
+
static const struct regmap_irq rk805_irqs[] = {
[RK805_IRQ_PWRON_RISE] = {
.mask = RK805_IRQ_PWRON_RISE_MSK,
@@ -532,6 +585,17 @@ static const struct regmap_irq rk817_irqs[RK817_IRQ_END] = {
REGMAP_IRQ_REG_LINE(23, 8)
};
+static const struct regmap_irq_chip rk801_irq_chip = {
+ .name = "rk801",
+ .irqs = rk801_irqs,
+ .num_irqs = ARRAY_SIZE(rk801_irqs),
+ .num_regs = 1,
+ .status_base = RK801_INT_STS0_REG,
+ .mask_base = RK801_INT_MASK0_REG,
+ .ack_base = RK801_INT_STS0_REG,
+ .init_ack_masked = true,
+};
+
static const struct regmap_irq_chip rk805_irq_chip = {
.name = "rk805",
.irqs = rk805_irqs,
@@ -610,6 +674,10 @@ static int rk808_power_off(struct sys_off_data *data)
unsigned int reg, bit;
switch (rk808->variant) {
+ case RK801_ID:
+ reg = RK801_SYS_CFG2_REG;
+ bit = DEV_OFF;
+ break;
case RK805_ID:
reg = RK805_DEV_CTRL_REG;
bit = DEV_OFF;
@@ -714,6 +782,13 @@ int rk8xx_probe(struct device *dev, int variant, unsigned int irq, struct regmap
dev_set_drvdata(dev, rk808);
switch (rk808->variant) {
+ case RK801_ID:
+ rk808->regmap_irq_chip = &rk801_irq_chip;
+ pre_init_reg = rk801_pre_init_reg;
+ nr_pre_init_regs = ARRAY_SIZE(rk801_pre_init_reg);
+ cells = rk801s;
+ nr_cells = ARRAY_SIZE(rk801s);
+ break;
case RK805_ID:
rk808->regmap_irq_chip = &rk805_irq_chip;
pre_init_reg = rk805_pre_init_reg;
@@ -831,6 +906,12 @@ int rk8xx_suspend(struct device *dev)
int ret = 0;
switch (rk808->variant) {
+ case RK801_ID:
+ ret = regmap_update_bits(rk808->regmap,
+ RK801_SLEEP_CFG_REG,
+ RK801_SLEEP_FUN_MSK,
+ RK801_SLEEP_FUN);
+ break;
case RK805_ID:
ret = regmap_update_bits(rk808->regmap,
RK805_GPIO_IO_POL_REG,
diff --git a/drivers/mfd/rk8xx-i2c.c b/drivers/mfd/rk8xx-i2c.c
index 37287b06dab..2951b2911a3 100644
--- a/drivers/mfd/rk8xx-i2c.c
+++ b/drivers/mfd/rk8xx-i2c.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Rockchip RK805/RK808/RK816/RK817/RK818 Core (I2C) driver
+ * Rockchip RK801/RK805/RK808/RK816/RK817/RK818 Core (I2C) driver
*
* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
* Copyright (C) 2016 PHYTEC Messtechnik GmbH
@@ -21,6 +21,23 @@ struct rk8xx_i2c_platform_data {
int variant;
};
+static bool rk801_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RK801_SYS_STS_REG:
+ case RK801_INT_STS0_REG:
+ case RK801_SYS_CFG0_REG:
+ case RK801_SYS_CFG1_REG:
+ case RK801_SYS_CFG2_REG:
+ case RK801_SYS_CFG3_REG:
+ case RK801_SYS_CFG4_REG:
+ case RK801_SLEEP_CFG_REG:
+ return true;
+ }
+
+ return false;
+}
+
static bool rk806_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
@@ -124,6 +141,14 @@ static const struct regmap_config rk818_regmap_config = {
.volatile_reg = rk808_is_volatile_reg,
};
+static const struct regmap_config rk801_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RK801_SYS_CFG3_OTP_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = rk801_is_volatile_reg,
+};
+
static const struct regmap_config rk805_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
@@ -164,6 +189,11 @@ static const struct regmap_config rk817_regmap_config = {
.volatile_reg = rk817_is_volatile_reg,
};
+static const struct rk8xx_i2c_platform_data rk801_data = {
+ .regmap_cfg = &rk801_regmap_config,
+ .variant = RK801_ID,
+};
+
static const struct rk8xx_i2c_platform_data rk805_data = {
.regmap_cfg = &rk805_regmap_config,
.variant = RK805_ID,
@@ -224,6 +254,7 @@ static void rk8xx_i2c_shutdown(struct i2c_client *client)
static SIMPLE_DEV_PM_OPS(rk8xx_i2c_pm_ops, rk8xx_suspend, rk8xx_resume);
static const struct of_device_id rk8xx_i2c_of_match[] = {
+ { .compatible = "rockchip,rk801", .data = &rk801_data },
{ .compatible = "rockchip,rk805", .data = &rk805_data },
{ .compatible = "rockchip,rk806", .data = &rk806_data },
{ .compatible = "rockchip,rk808", .data = &rk808_data },
diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h
index 28170ee0889..7ffc904c864 100644
--- a/include/linux/mfd/rk808.h
+++ b/include/linux/mfd/rk808.h
@@ -340,6 +340,123 @@ enum rk818_reg {
#define RK818_USB_ILMIN_2000MA 0x7
#define RK818_USB_CHG_SD_VSEL_MASK 0x70
+/* RK801 */
+enum rk801_reg {
+ RK801_ID_DCDC1,
+ RK801_ID_DCDC2,
+ RK801_ID_DCDC4,
+ RK801_ID_DCDC3,
+ RK801_ID_LDO1,
+ RK801_ID_LDO2,
+ RK801_ID_SWITCH,
+ RK801_ID_MAX,
+};
+
+#define RK801_SLP_REG_OFFSET 5
+#define RK801_NUM_REGULATORS 7
+
+#define RK801_HW_SYNC_US 32
+
+/* RK801 Register Definitions */
+#define RK801_ID_MSB 0x00
+#define RK801_ID_LSB 0x01
+#define RK801_OTP_VER_REG 0x02
+#define RK801_POWER_EN0_REG 0x03
+#define RK801_POWER_EN1_REG 0x04
+#define RK801_POWER_SLP_EN_REG 0x05
+#define RK801_POWER_FPWM_EN_REG 0x06
+#define RK801_SLP_LP_CONFIG_REG 0x07
+#define RK801_BUCK_CONFIG_REG 0x08
+#define RK801_BUCK1_ON_VSEL_REG 0x09
+#define RK801_BUCK2_ON_VSEL_REG 0x0a
+#define RK801_BUCK4_ON_VSEL_REG 0x0b
+#define RK801_LDO1_ON_VSEL_REG 0x0c
+#define RK801_LDO2_ON_VSEL_REG 0x0d
+#define RK801_BUCK1_SLP_VSEL_REG 0x0e
+#define RK801_BUCK2_SLP_VSEL_REG 0x0f
+#define RK801_BUCK4_SLP_VSEL_REG 0x10
+#define RK801_LDO1_SLP_VSEL_REG 0x11
+#define RK801_LDO2_SLP_VSEL_REG 0x12
+#define RK801_LDO_SW_IMAX_REG 0x13
+#define RK801_SYS_STS_REG 0x14
+#define RK801_SYS_CFG0_REG 0x15
+#define RK801_SYS_CFG1_REG 0x16
+#define RK801_SYS_CFG2_REG 0x17
+#define RK801_SYS_CFG3_REG 0x18
+#define RK801_SYS_CFG4_REG 0x19
+#define RK801_SLEEP_CFG_REG 0x1a
+#define RK801_ON_SOURCE_REG 0x1b
+#define RK801_OFF_SOURCE_REG 0x1c
+#define RK801_PWRON_KEY_REG 0x1d
+#define RK801_INT_STS0_REG 0x1e
+#define RK801_INT_MASK0_REG 0x1f
+#define RK801_INT_CONFIG_REG 0x20
+#define RK801_CON_BACK1_REG 0x21
+#define RK801_CON_BACK2_REG 0x22
+#define RK801_DATA_CON0_REG 0x23
+#define RK801_DATA_CON1_REG 0x24
+#define RK801_DATA_CON2_REG 0x25
+#define RK801_DATA_CON3_REG 0x26
+#define RK801_POWER_EXIT_SLP_SEQ0_REG 0x27
+#define RK801_POWER_EXIT_SLP_SEQ1_REG 0x28
+#define RK801_POWER_EXIT_SLP_SEQ2_REG 0x29
+#define RK801_POWER_EXIT_SLP_SEQ3_REG 0x2a
+#define RK801_POWER_ENTER_SLP_OR_SHTD_SEQ0_REG 0x2b
+#define RK801_POWER_ENTER_SLP_OR_SHTD_SEQ1_REG 0x2c
+#define RK801_POWER_ENTER_SLP_OR_SHTD_SEQ2_REG 0x2d
+#define RK801_POWER_ENTER_SLP_OR_SHTD_SEQ3_REG 0x2e
+#define RK801_BUCK_DEBUG1_REG 0x2f
+#define RK801_BUCK_DEBUG2_REG 0x30
+#define RK801_BUCK_DEBUG3_REG 0x31
+#define RK801_BUCK_DEBUG4_REG 0x32
+#define RK801_BUCK_DEBUG5_REG 0x33
+#define RK801_BUCK_DEBUG7_REG 0x34
+#define RK801_OTP_EN_CON_REG 0x35
+#define RK801_TEST_CON_REG 0x36
+#define RK801_EFUSE_CONTROL_REG 0x37
+#define RK801_SYS_CFG3_OTP_REG 0x38
+
+/* RK801 IRQ Definitions */
+#define RK801_IRQ_PWRON_FALL 0
+#define RK801_IRQ_PWRON_RISE 1
+#define RK801_IRQ_PWRON 2
+#define RK801_IRQ_PWRON_LP 3
+#define RK801_IRQ_HOTDIE 4
+#define RK801_IRQ_VDC_RISE 5
+#define RK801_IRQ_VDC_FALL 6
+#define RK801_IRQ_PWRON_FALL_MSK BIT(0)
+#define RK801_IRQ_PWRON_RISE_MSK BIT(1)
+#define RK801_IRQ_PWRON_MSK BIT(2)
+#define RK801_IRQ_PWRON_LP_MSK BIT(3)
+#define RK801_IRQ_HOTDIE_MSK BIT(4)
+#define RK801_IRQ_VDC_RISE_MSK BIT(5)
+#define RK801_IRQ_VDC_FALL_MSK BIT(6)
+/* RK801_SLP_LP_CONFIG_REG */
+#define RK801_BUCK_SLP_LP_EN BIT(3)
+#define RK801_PLDO_SLP_LP_EN BIT(1)
+#define RK801_SLP_LP_MASK (RK801_PLDO_SLP_LP_EN | RK801_BUCK_SLP_LP_EN)
+/* RK801_SLEEP_CFG_REG */
+#define RK801_SLEEP_FUN_MSK 0x3
+#define RK801_NONE_FUN 0x0
+#define RK801_SLEEP_FUN 0x1
+#define RK801_SHUTDOWN_FUN 0x2
+#define RK801_RESET_FUN 0x3
+/* RK801_SYS_CFG2_REG */
+#define RK801_SLEEP_POL_MSK BIT(1)
+#define RK801_SLEEP_ACT_H BIT(1)
+#define RK801_SLEEP_ACT_L 0
+#define RK801_RST_MSK (0x3 << 4)
+#define RK801_RST_RESTART_PMU (0x0 << 4)
+#define RK801_RST_RESTART_REG (0x1 << 4)
+#define RK801_RST_RESTART_REG_RESETB (0x2 << 4)
+/* RK801_INT_CONFIG_REG */
+#define RK801_INT_POL_MSK BIT(1)
+#define RK801_INT_ACT_H BIT(1)
+#define RK801_INT_ACT_L 0
+#define RK801_FPWM_MODE 1
+#define RK801_AUTO_PWM_MODE 0
+#define RK801_PLDO_HRDEC_EN BIT(6)
+
/* RK805 */
enum rk805_reg {
RK805_ID_DCDC1,
@@ -1332,6 +1449,7 @@ enum {
};
enum {
+ RK801_ID = 0x8010,
RK805_ID = 0x8050,
RK806_ID = 0x8060,
RK808_ID = 0x0000,
--
2.25.1
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