power: regulator: add regulator support for CPCAP PMIC
The driver provides regulator set/get voltage and enable/disable functions
for CPCAP PMIC.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index bab6831..bec2d2d 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -493,3 +493,12 @@
Enable this option to support controlling the VBUS supply in
the USB PHY peripheral of the Renesas RZ/G2L SoC. This option
is required in order to use the USB OTG port.
+
+config DM_REGULATOR_CPCAP
+ bool "Enable driver for CPCAP PMIC regulators"
+ depends on DM_REGULATOR && DM_PMIC_CPCAP
+ ---help---
+ Enable implementation of driver-model regulator uclass features for
+ REGULATOR CPCAP. The driver supports both DC-to-DC Step-Down Switching
+ (SW) Regulators and Low-Dropout Linear (LDO) Regulators found in CPCAP
+ PMIC and implements get/set api for voltage and state.
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index cb6d5b2..99affa2 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -44,3 +44,4 @@
obj-$(CONFIG_$(PHASE_)DM_REGULATOR_ANATOP) += anatop_regulator.o
obj-$(CONFIG_DM_REGULATOR_TPS65219) += tps65219_regulator.o
obj-$(CONFIG_REGULATOR_RZG2L_USBPHY) += rzg2l-usbphy-regulator.o
+obj-$(CONFIG_$(PHASE_)DM_REGULATOR_CPCAP) += cpcap_regulator.o
diff --git a/drivers/power/regulator/cpcap_regulator.c b/drivers/power/regulator/cpcap_regulator.c
new file mode 100644
index 0000000..04cd665
--- /dev/null
+++ b/drivers/power/regulator/cpcap_regulator.c
@@ -0,0 +1,275 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2025 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <dm.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/cpcap.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+
+/* CPCAP_REG_ASSIGN2 bits - Resource Assignment 2 */
+#define CPCAP_BIT_VSDIO_SEL BIT(15)
+#define CPCAP_BIT_VDIG_SEL BIT(14)
+#define CPCAP_BIT_VCAM_SEL BIT(13)
+#define CPCAP_BIT_SW6_SEL BIT(12)
+#define CPCAP_BIT_SW5_SEL BIT(11)
+#define CPCAP_BIT_SW4_SEL BIT(10)
+#define CPCAP_BIT_SW3_SEL BIT(9)
+#define CPCAP_BIT_SW2_SEL BIT(8)
+#define CPCAP_BIT_SW1_SEL BIT(7)
+
+/* CPCAP_REG_ASSIGN3 bits - Resource Assignment 3 */
+#define CPCAP_BIT_VUSBINT2_SEL BIT(15)
+#define CPCAP_BIT_VUSBINT1_SEL BIT(14)
+#define CPCAP_BIT_VVIB_SEL BIT(13)
+#define CPCAP_BIT_VWLAN1_SEL BIT(12)
+#define CPCAP_BIT_VRF1_SEL BIT(11)
+#define CPCAP_BIT_VHVIO_SEL BIT(10)
+#define CPCAP_BIT_VDAC_SEL BIT(9)
+#define CPCAP_BIT_VUSB_SEL BIT(8)
+#define CPCAP_BIT_VSIM_SEL BIT(7)
+#define CPCAP_BIT_VRFREF_SEL BIT(6)
+#define CPCAP_BIT_VPLL_SEL BIT(5)
+#define CPCAP_BIT_VFUSE_SEL BIT(4)
+#define CPCAP_BIT_VCSI_SEL BIT(3)
+#define CPCAP_BIT_SPARE_14_2 BIT(2)
+#define CPCAP_BIT_VWLAN2_SEL BIT(1)
+#define CPCAP_BIT_VRF2_SEL BIT(0)
+#define CPCAP_BIT_NONE 0
+
+/* CPCAP_REG_ASSIGN4 bits - Resource Assignment 4 */
+#define CPCAP_BIT_VAUDIO_SEL BIT(0)
+
+/*
+ * Off mode configuration bit. Used currently only by SW5 on omap4. There's
+ * the following comment in Motorola Linux kernel tree for it:
+ *
+ * When set in the regulator mode, the regulator assignment will be changed
+ * to secondary when the regulator is disabled. The mode will be set back to
+ * primary when the regulator is turned on.
+ */
+#define CPCAP_REG_OFF_MODE_SEC BIT(15)
+
+#define CPCAP_REG(_reg, _assignment_reg, _assignment_mask, _mode_mask, \
+ _volt_mask, _volt_shft, _mode_val, _off_mode_val, _val_tbl, \
+ _mode_cntr, _volt_trans_time, _turn_on_time, _bit_offset) { \
+ .reg = CPCAP_REG_##_reg, \
+ .assignment_reg = CPCAP_REG_##_assignment_reg, \
+ .assignment_mask = CPCAP_BIT_##_assignment_mask, \
+ .mode_mask = _mode_mask, \
+ .volt_mask = _volt_mask, \
+ .volt_shft = _volt_shft, \
+ .mode_val = _mode_val, \
+ .off_mode_val = _off_mode_val, \
+ .val_tbl_sz = ARRAY_SIZE(_val_tbl), \
+ .val_tbl = _val_tbl, \
+ .mode_cntr = _mode_cntr, \
+ .volt_trans_time = _volt_trans_time, \
+ .turn_on_time = _turn_on_time, \
+ .bit_offset_from_cpcap_lowest_voltage = _bit_offset, \
+}
+
+static const struct cpcap_regulator_data tegra20_regulators[CPCAP_REGULATORS_COUNT] = {
+ /* BUCK */
+ [CPCAP_SW1] = CPCAP_REG(S1C1, ASSIGN2, SW1_SEL, 0x6f00, 0x007f,
+ 0, 0x6800, 0, sw1_val_tbl, 0, 0, 1500, 0x0c),
+ [CPCAP_SW2] = CPCAP_REG(S2C1, ASSIGN2, SW2_SEL, 0x6f00, 0x007f,
+ 0, 0x4804, 0, sw2_sw4_val_tbl, 0, 0, 1500, 0x18),
+ [CPCAP_SW3] = CPCAP_REG(S3C, ASSIGN2, SW3_SEL, 0x0578, 0x0003,
+ 0, 0x043c, 0, sw3_val_tbl, 0, 0, 0, 0),
+ [CPCAP_SW4] = CPCAP_REG(S4C1, ASSIGN2, SW4_SEL, 0x6f00, 0x007f,
+ 0, 0x4909, 0, sw2_sw4_val_tbl, 0, 0, 1500, 0x18),
+ [CPCAP_SW5] = CPCAP_REG(S5C, ASSIGN2, SW5_SEL, 0x0028, 0x0000,
+ 0, 0x0020, 0, sw5_val_tbl, 0, 0, 1500, 0),
+ [CPCAP_SW6] = CPCAP_REG(S6C, ASSIGN2, SW6_SEL, 0x0000, 0x0000,
+ 0, 0, 0, unknown_val_tbl, 0, 0, 0, 0),
+ /* LDO */
+ [CPCAP_VCAM] = CPCAP_REG(VCAMC, ASSIGN2, VCAM_SEL, 0x0087, 0x0030,
+ 4, 0x7, 0, vcam_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VCSI] = CPCAP_REG(VCSIC, ASSIGN3, VCSI_SEL, 0x0047, 0x0010,
+ 4, 0x7, 0, vcsi_val_tbl, 0, 350, 1000, 0),
+ [CPCAP_VDAC] = CPCAP_REG(VDACC, ASSIGN3, VDAC_SEL, 0x0087, 0x0030,
+ 4, 0x0, 0, vdac_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VDIG] = CPCAP_REG(VDIGC, ASSIGN2, VDIG_SEL, 0x0087, 0x0030,
+ 4, 0x0, 0, vdig_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VFUSE] = CPCAP_REG(VFUSEC, ASSIGN3, VFUSE_SEL, 0x00a0, 0x000f,
+ 0, 0x0, 0, vfuse_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VHVIO] = CPCAP_REG(VHVIOC, ASSIGN3, VHVIO_SEL, 0x0017, 0x0000,
+ 0, 0x2, 0, vhvio_val_tbl, 0, 0, 1000, 0),
+ [CPCAP_VSDIO] = CPCAP_REG(VSDIOC, ASSIGN2, VSDIO_SEL, 0x0087, 0x0038,
+ 3, 0x2, 0, vsdio_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VPLL] = CPCAP_REG(VPLLC, ASSIGN3, VPLL_SEL, 0x0047, 0x0018,
+ 3, 0x1, 0, vpll_val_tbl, 0, 420, 100, 0),
+ [CPCAP_VRF1] = CPCAP_REG(VRF1C, ASSIGN3, VRF1_SEL, 0x00ac, 0x0002,
+ 1, 0x0, 0, vrf1_val_tbl, 0, 10, 1000, 0),
+ [CPCAP_VRF2] = CPCAP_REG(VRF2C, ASSIGN3, VRF2_SEL, 0x0023, 0x0008,
+ 3, 0x0, 0, vrf2_val_tbl, 0, 10, 1000, 0),
+ [CPCAP_VRFREF] = CPCAP_REG(VRFREFC, ASSIGN3, VRFREF_SEL, 0x0023, 0x0008,
+ 3, 0x0, 0, vrfref_val_tbl, 0, 420, 100, 0),
+ [CPCAP_VWLAN1] = CPCAP_REG(VWLAN1C, ASSIGN3, VWLAN1_SEL, 0x0047, 0x0010,
+ 4, 0x0, 0, vwlan1_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VWLAN2] = CPCAP_REG(VWLAN2C, ASSIGN3, VWLAN2_SEL, 0x020c, 0x00c0,
+ 6, 0xd, 0, vwlan2_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VSIM] = CPCAP_REG(VSIMC, ASSIGN3, NONE, 0x0023, 0x0008,
+ 3, 0x0, 0, vsim_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VSIMCARD] = CPCAP_REG(VSIMC, ASSIGN3, NONE, 0x1e80, 0x0008,
+ 3, 0x1E00, 0, vsimcard_val_tbl, 0, 420, 1000, 0),
+ [CPCAP_VVIB] = CPCAP_REG(VVIBC, ASSIGN3, VVIB_SEL, 0x0001, 0x000c,
+ 2, 0x1, 0, vvib_val_tbl, 0, 500, 500, 0),
+ [CPCAP_VUSB] = CPCAP_REG(VUSBC, ASSIGN3, VUSB_SEL, 0x011c, 0x0040,
+ 6, 0xc, 0, vusb_val_tbl, 0, 0, 1000, 0),
+ [CPCAP_VAUDIO] = CPCAP_REG(VAUDIOC, ASSIGN4, VAUDIO_SEL, 0x0016, 0x0001,
+ 0, 0x5, 0, vaudio_val_tbl, 0, 0, 1000, 0),
+};
+
+static int cpcap_regulator_get_value(struct udevice *dev)
+{
+ const struct cpcap_regulator_data *regulator =
+ &tegra20_regulators[dev->driver_data];
+ int value, volt_shift = regulator->volt_shft;
+
+ value = pmic_reg_read(dev->parent, regulator->reg);
+ if (value < 0)
+ return value;
+
+ if (!(value & regulator->mode_mask))
+ return 0;
+
+ value &= regulator->volt_mask;
+ value -= regulator->bit_offset_from_cpcap_lowest_voltage;
+
+ return regulator->val_tbl[value >> volt_shift];
+}
+
+static int cpcap_regulator_set_value(struct udevice *dev, int uV)
+{
+ const struct cpcap_regulator_data *regulator =
+ &tegra20_regulators[dev->driver_data];
+ int value, ret, volt_shift = regulator->volt_shft;
+
+ if (dev->driver_data == CPCAP_VRF1) {
+ if (uV > 2500000)
+ value = 0;
+ else
+ value = regulator->volt_mask;
+ } else {
+ for (value = 0; value < regulator->val_tbl_sz; value++)
+ if (regulator->val_tbl[value] >= uV)
+ break;
+
+ if (value >= regulator->val_tbl_sz)
+ value = regulator->val_tbl_sz;
+
+ value <<= volt_shift;
+ value += regulator->bit_offset_from_cpcap_lowest_voltage;
+ }
+
+ ret = pmic_clrsetbits(dev->parent, regulator->reg, regulator->volt_mask,
+ value);
+ if (ret)
+ return ret;
+
+ if (regulator->volt_trans_time)
+ udelay(regulator->volt_trans_time);
+
+ return 0;
+}
+
+static int cpcap_regulator_get_enable(struct udevice *dev)
+{
+ const struct cpcap_regulator_data *regulator =
+ &tegra20_regulators[dev->driver_data];
+ int value;
+
+ value = pmic_reg_read(dev->parent, regulator->reg);
+ if (value < 0)
+ return value;
+
+ return (value & regulator->mode_mask) ? 1 : 0;
+}
+
+static int cpcap_regulator_set_enable(struct udevice *dev, bool enable)
+{
+ const struct cpcap_regulator_data *regulator =
+ &tegra20_regulators[dev->driver_data];
+ int ret;
+
+ if (enable) {
+ ret = pmic_clrsetbits(dev->parent, regulator->reg, regulator->mode_mask,
+ regulator->mode_val);
+ if (ret)
+ return ret;
+ }
+
+ if (regulator->mode_val & CPCAP_REG_OFF_MODE_SEC) {
+ ret = pmic_clrsetbits(dev->parent, regulator->assignment_reg,
+ regulator->assignment_mask,
+ enable ? 0 : regulator->assignment_mask);
+ if (ret)
+ return ret;
+ }
+
+ if (!enable) {
+ ret = pmic_clrsetbits(dev->parent, regulator->reg, regulator->mode_mask,
+ regulator->off_mode_val);
+ if (ret)
+ return ret;
+ }
+
+ if (regulator->turn_on_time)
+ udelay(regulator->turn_on_time);
+
+ return 0;
+}
+
+static int cpcap_regulator_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
+ int id;
+
+ for (id = 0; id < CPCAP_REGULATORS_COUNT; id++)
+ if (cpcap_regulator_to_name[id])
+ if (!strcmp(dev->name, cpcap_regulator_to_name[id]))
+ break;
+
+ switch (id) {
+ case CPCAP_SW1 ... CPCAP_SW6:
+ uc_pdata->type = REGULATOR_TYPE_BUCK;
+ break;
+
+ case CPCAP_VCAM ... CPCAP_VAUDIO:
+ uc_pdata->type = REGULATOR_TYPE_LDO;
+ break;
+
+ default:
+ log_err("CPCAP: Invalid regulator ID\n");
+ return -ENODEV;
+ }
+
+ dev->driver_data = id;
+ return 0;
+}
+
+static const struct dm_regulator_ops cpcap_regulator_ops = {
+ .get_value = cpcap_regulator_get_value,
+ .set_value = cpcap_regulator_set_value,
+ .get_enable = cpcap_regulator_get_enable,
+ .set_enable = cpcap_regulator_set_enable,
+};
+
+U_BOOT_DRIVER(cpcap_sw) = {
+ .name = CPCAP_SW_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &cpcap_regulator_ops,
+ .probe = cpcap_regulator_probe,
+};
+
+U_BOOT_DRIVER(cpcap_ldo) = {
+ .name = CPCAP_LDO_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &cpcap_regulator_ops,
+ .probe = cpcap_regulator_probe,
+};