[U-Boot] [PATCH v4 2/2] regulator: bd718x7: support ROHM BD71837 and BD71847 PMICs
Matti Vaittinen
matti.vaittinen at fi.rohmeurope.com
Tue May 7 07:45:55 UTC 2019
BD71837 and BD71847 is PMIC intended for powering single-core,
dual-core, and quad-core SoC’s such as NXP-i.MX 8M. BD71847
is used for example on NXP imx8mm EVK.
Add regulator driver for ROHM BD71837 and BD71847 PMICs.
BD71837 contains 8 bucks and 7 LDOS. BD71847 is reduced
version containing 6 bucks and 6 LDOs. Voltages for DVS
bucks (1-4 on BD71837, 1 and 2 on BD71847) can be adjusted
when regulators are enabled. For other bucks and LDOs we may
have over- or undershooting if voltage is adjusted when
regulator is enabled. Thus this is prevented by default.
BD718x7 has a quirk which may leave power output disabled
after reset if enable/disable state was controlled by SW.
Thus the SW control is only allowed for BD71837 bucks
3 and 4 by default. The impact of this limitation must be
evaluated board-by board and restrictions may need to be
modified. (Linux driver get's these limitations from DT and we
may want to implement same on u-Boot driver).
Signed-off-by: Matti Vaittinen <matti.vaittinen at fi.rohmeurope.com>
---
Changelog v3 => v4:
- prefer u8 over uint8_t
- prefer types with natural alignment over u8 on function arguments
- remove inclusion of errno.h from drivers/power/regulator/bd71837.c
drivers/power/pmic/bd71837.c | 32 +-
drivers/power/regulator/Kconfig | 17 ++
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/bd71837.c | 468 ++++++++++++++++++++++++++++++
include/power/bd71837.h | 147 ++++++----
5 files changed, 607 insertions(+), 58 deletions(-)
create mode 100644 drivers/power/regulator/bd71837.c
diff --git a/drivers/power/pmic/bd71837.c b/drivers/power/pmic/bd71837.c
index 24d9f7fab7..e292d42a8c 100644
--- a/drivers/power/pmic/bd71837.c
+++ b/drivers/power/pmic/bd71837.c
@@ -3,6 +3,8 @@
* Copyright 2018 NXP
*/
+#define DEBUG
+
#include <common.h>
#include <errno.h>
#include <dm.h>
@@ -15,15 +17,15 @@ DECLARE_GLOBAL_DATA_PTR;
static const struct pmic_child_info pmic_children_info[] = {
/* buck */
- { .prefix = "b", .driver = BD71837_REGULATOR_DRIVER},
+ { .prefix = "b", .driver = BD718XX_REGULATOR_DRIVER},
/* ldo */
- { .prefix = "l", .driver = BD71837_REGULATOR_DRIVER},
+ { .prefix = "l", .driver = BD718XX_REGULATOR_DRIVER},
{ },
};
static int bd71837_reg_count(struct udevice *dev)
{
- return BD71837_REG_NUM;
+ return BD718XX_MAX_REGISTER - 1;
}
static int bd71837_write(struct udevice *dev, uint reg, const uint8_t *buff,
@@ -54,7 +56,7 @@ static int bd71837_bind(struct udevice *dev)
regulators_node = dev_read_subnode(dev, "regulators");
if (!ofnode_valid(regulators_node)) {
- debug("%s: %s regulators subnode not found!", __func__,
+ debug("%s: %s regulators subnode not found!\n", __func__,
dev->name);
return -ENXIO;
}
@@ -69,6 +71,24 @@ static int bd71837_bind(struct udevice *dev)
return 0;
}
+static int bd718x7_probe(struct udevice *dev)
+{
+ int ret;
+ uint8_t mask = BD718XX_REGLOCK_PWRSEQ | BD718XX_REGLOCK_VREG;
+
+ /* Unlock the PMIC regulator control before probing the children */
+ ret = pmic_clrsetbits(dev, BD718XX_REGLOCK, mask, 0);
+ if (ret) {
+ debug("%s: %s Failed to unlock regulator control\n", __func__,
+ dev->name);
+ return ret;
+ }
+ debug("%s: '%s' - BD718x7 PMIC registers unlocked\n", __func__,
+ dev->name);
+
+ return 0;
+}
+
static struct dm_pmic_ops bd71837_ops = {
.reg_count = bd71837_reg_count,
.read = bd71837_read,
@@ -76,7 +96,8 @@ static struct dm_pmic_ops bd71837_ops = {
};
static const struct udevice_id bd71837_ids[] = {
- { .compatible = "rohm,bd71837", .data = 0x4b, },
+ { .compatible = "rohm,bd71837", .data = ROHM_CHIP_TYPE_BD71837, },
+ { .compatible = "rohm,bd71847", .data = ROHM_CHIP_TYPE_BD71847, },
{ }
};
@@ -85,5 +106,6 @@ U_BOOT_DRIVER(pmic_bd71837) = {
.id = UCLASS_PMIC,
.of_match = bd71837_ids,
.bind = bd71837_bind,
+ .probe = bd718x7_probe,
.ops = &bd71837_ops,
};
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 3ed0dd2264..4687bee09c 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -43,6 +43,23 @@ config REGULATOR_AS3722
but does not yet support change voltages. Currently this must be
done using direct register writes to the PMIC.
+config DM_REGULATOR_BD71837
+ bool "Enable Driver Model for ROHM BD71837/BD71847 regulators"
+ depends on DM_REGULATOR && DM_PMIC_BD71837
+ help
+ This config enables implementation of driver-model regulator uclass
+ features for regulators on ROHM BD71837 and BD71847 PMICs.
+ BD71837 contains 8 bucks and 7 LDOS. BD71847 is reduced version
+ containing 6 bucks and 6 LDOs. The driver implements get/set api for
+ value and enable.
+
+config SPL_DM_REGULATOR_BD71837
+ bool "Enable Driver Model for ROHM BD71837/BD71847 regulators in SPL"
+ depends on DM_REGULATOR_BD71837
+ help
+ This config enables implementation of driver-model regulator uclass
+ features for regulators on ROHM BD71837 and BD71847 in SPL.
+
config DM_REGULATOR_PFUZE100
bool "Enable Driver Model for REGULATOR PFUZE100"
depends on DM_REGULATOR && DM_PMIC_PFUZE100
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index f617ce723a..898ed5f084 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_REGULATOR_ACT8846) += act8846.o
obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o
obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o
obj-$(CONFIG_$(SPL_)DM_PMIC_PFUZE100) += pfuze100.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_BD71837) += bd71837.o
obj-$(CONFIG_$(SPL_)REGULATOR_PWM) += pwm_regulator.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_FAN53555) += fan53555.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_FIXED) += fixed.o
diff --git a/drivers/power/regulator/bd71837.c b/drivers/power/regulator/bd71837.c
new file mode 100644
index 0000000000..575429aa2d
--- /dev/null
+++ b/drivers/power/regulator/bd71837.c
@@ -0,0 +1,468 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2019 ROHM Semiconductors
+ *
+ * ROHM BD71837 regulator driver
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <power/bd71837.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+
+#define HW_STATE_CONTROL 0
+#define DEBUG
+
+/**
+ * struct bd71837_vrange - describe linear range of voltages
+ *
+ * @min_volt: smallest voltage in range
+ * @step: how much voltage changes at each selector step
+ * @min_sel: smallest selector in the range
+ * @max_sel: maximum selector in the range
+ * @rangeval: register value used to select this range if selectible
+ * ranges are supported
+ */
+struct bd71837_vrange {
+ unsigned int min_volt;
+ unsigned int step;
+ u8 min_sel;
+ u8 max_sel;
+ u8 rangeval;
+};
+
+/**
+ * struct bd71837_platdata - describe regulator control registers
+ *
+ * @name: name of the regulator. Used for matching the dt-entry
+ * @enable_reg: register address used to enable/disable regulator
+ * @enablemask: register mask used to enable/disable regulator
+ * @volt_reg: register address used to configure regulator voltage
+ * @volt_mask: register mask used to configure regulator voltage
+ * @ranges: pointer to ranges of regulator voltages and matching register
+ * values
+ * @numranges: number of voltage ranges pointed by ranges
+ * @rangemask: mask for selecting used ranges if multiple ranges are supported
+ * @sel_mask: bit to toggle in order to transfer the register control to SW
+ * @dvs: whether the voltage can be changed when regulator is enabled
+ */
+struct bd71837_platdata {
+ const char *name;
+ u8 enable_reg;
+ u8 enablemask;
+ u8 volt_reg;
+ u8 volt_mask;
+ struct bd71837_vrange *ranges;
+ unsigned int numranges;
+ u8 rangemask;
+ u8 sel_mask;
+ bool dvs;
+};
+
+#define BD_RANGE(_min, _vstep, _sel_low, _sel_hi, _range_sel) \
+{ \
+ .min_volt = (_min), .step = (_vstep), .min_sel = (_sel_low), \
+ .max_sel = (_sel_hi), .rangeval = (_range_sel) \
+}
+
+#define BD_DATA(_name, enreg, enmask, vreg, vmask, _range, rmask, _dvs, sel) \
+{ \
+ .name = (_name), .enable_reg = (enreg), .enablemask = (enmask), \
+ .volt_reg = (vreg), .volt_mask = (vmask), .ranges = (_range), \
+ .numranges = ARRAY_SIZE(_range), .rangemask = (rmask), .dvs = (_dvs), \
+ .sel_mask = (sel) \
+}
+
+static struct bd71837_vrange dvs_buck_vranges[] = {
+ BD_RANGE(700000, 10000, 0, 0x3c, 0),
+ BD_RANGE(1300000, 0, 0x3d, 0x3f, 0),
+};
+
+static struct bd71837_vrange bd71847_buck3_vranges[] = {
+ BD_RANGE(700000, 100000, 0x00, 0x03, 0),
+ BD_RANGE(1050000, 50000, 0x04, 0x05, 0),
+ BD_RANGE(1200000, 150000, 0x06, 0x07, 0),
+ BD_RANGE(550000, 50000, 0x0, 0x7, 0x40),
+ BD_RANGE(675000, 100000, 0x0, 0x3, 0x80),
+ BD_RANGE(1025000, 50000, 0x4, 0x5, 0x80),
+ BD_RANGE(1175000, 150000, 0x6, 0x7, 0x80),
+};
+
+static struct bd71837_vrange bd71847_buck4_vranges[] = {
+ BD_RANGE(3000000, 100000, 0x00, 0x03, 0),
+ BD_RANGE(2600000, 100000, 0x00, 0x03, 40),
+};
+
+static struct bd71837_vrange bd71837_buck5_vranges[] = {
+ BD_RANGE(700000, 100000, 0, 0x3, 0),
+ BD_RANGE(1050000, 50000, 0x04, 0x05, 0),
+ BD_RANGE(1200000, 150000, 0x06, 0x07, 0),
+ BD_RANGE(675000, 100000, 0x0, 0x3, 0x80),
+ BD_RANGE(1025000, 50000, 0x04, 0x05, 0x80),
+ BD_RANGE(1175000, 150000, 0x06, 0x07, 0x80),
+};
+
+static struct bd71837_vrange bd71837_buck6_vranges[] = {
+ BD_RANGE(3000000, 100000, 0x00, 0x03, 0),
+};
+
+static struct bd71837_vrange nodvs_buck3_vranges[] = {
+ BD_RANGE(1605000, 90000, 0, 1, 0),
+ BD_RANGE(1755000, 45000, 2, 4, 0),
+ BD_RANGE(1905000, 45000, 5, 7, 0),
+};
+
+static struct bd71837_vrange nodvs_buck4_vranges[] = {
+ BD_RANGE(800000, 10000, 0x00, 0x3C, 0),
+};
+
+static struct bd71837_vrange ldo1_vranges[] = {
+ BD_RANGE(3000000, 100000, 0x00, 0x03, 0),
+ BD_RANGE(1600000, 100000, 0x00, 0x03, 0x20),
+};
+
+static struct bd71837_vrange ldo2_vranges[] = {
+ BD_RANGE(900000, 0, 0, 0, 0),
+ BD_RANGE(800000, 0, 1, 1, 0),
+};
+
+static struct bd71837_vrange ldo3_vranges[] = {
+ BD_RANGE(1800000, 100000, 0x00, 0x0f, 0),
+};
+
+static struct bd71837_vrange ldo4_vranges[] = {
+ BD_RANGE(900000, 100000, 0x00, 0x09, 0),
+};
+
+static struct bd71837_vrange bd71837_ldo5_vranges[] = {
+ BD_RANGE(1800000, 100000, 0x00, 0x0f, 0),
+};
+
+static struct bd71837_vrange bd71847_ldo5_vranges[] = {
+ BD_RANGE(1800000, 100000, 0x00, 0x0f, 0),
+ BD_RANGE(800000, 100000, 0x00, 0x0f, 0x20),
+};
+
+static struct bd71837_vrange ldo6_vranges[] = {
+ BD_RANGE(900000, 100000, 0x00, 0x09, 0),
+};
+
+static struct bd71837_vrange ldo7_vranges[] = {
+ BD_RANGE(1800000, 100000, 0x00, 0x0f, 0),
+};
+
+/*
+ * We use enable mask 'HW_STATE_CONTROL' to indicate that this regulator
+ * must not be enabled or disabled by SW. The typical use-case for BD71837
+ * is powering NXP i.MX8. In this use-case we (for now) only allow control
+ * for BUCK3 and BUCK4 which are not boot critical.
+ */
+static struct bd71837_platdata bd71837_reg_data[] = {
+/* Bucks 1-4 which support dynamic voltage scaling */
+ BD_DATA("BUCK1", BD718XX_BUCK1_CTRL, HW_STATE_CONTROL,
+ BD718XX_BUCK1_VOLT_RUN, DVS_BUCK_RUN_MASK, dvs_buck_vranges, 0,
+ true, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK2", BD718XX_BUCK2_CTRL, HW_STATE_CONTROL,
+ BD718XX_BUCK2_VOLT_RUN, DVS_BUCK_RUN_MASK, dvs_buck_vranges, 0,
+ true, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK3", BD71837_BUCK3_CTRL, BD718XX_BUCK_EN,
+ BD71837_BUCK3_VOLT_RUN, DVS_BUCK_RUN_MASK, dvs_buck_vranges, 0,
+ true, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK4", BD71837_BUCK4_CTRL, BD718XX_BUCK_EN,
+ BD71837_BUCK4_VOLT_RUN, DVS_BUCK_RUN_MASK, dvs_buck_vranges, 0,
+ true, BD718XX_BUCK_SEL),
+/* Bucks 5-8 which do not support dynamic voltage scaling */
+ BD_DATA("BUCK5", BD718XX_1ST_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_1ST_NODVS_BUCK_VOLT, BD718XX_1ST_NODVS_BUCK_MASK,
+ bd71837_buck5_vranges, 0x80, false, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK6", BD718XX_2ND_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_2ND_NODVS_BUCK_VOLT, BD71837_BUCK6_MASK,
+ bd71837_buck6_vranges, 0, false, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK7", BD718XX_3RD_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_3RD_NODVS_BUCK_VOLT, BD718XX_3RD_NODVS_BUCK_MASK,
+ nodvs_buck3_vranges, 0, false, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK8", BD718XX_4TH_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_4TH_NODVS_BUCK_VOLT, BD718XX_4TH_NODVS_BUCK_MASK,
+ nodvs_buck4_vranges, 0, false, BD718XX_BUCK_SEL),
+/* LDOs */
+ BD_DATA("LDO1", BD718XX_LDO1_VOLT, HW_STATE_CONTROL, BD718XX_LDO1_VOLT,
+ BD718XX_LDO1_MASK, ldo1_vranges, 0x20, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO2", BD718XX_LDO2_VOLT, HW_STATE_CONTROL, BD718XX_LDO2_VOLT,
+ BD718XX_LDO2_MASK, ldo2_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO3", BD718XX_LDO3_VOLT, HW_STATE_CONTROL, BD718XX_LDO3_VOLT,
+ BD718XX_LDO3_MASK, ldo3_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO4", BD718XX_LDO4_VOLT, HW_STATE_CONTROL, BD718XX_LDO4_VOLT,
+ BD718XX_LDO4_MASK, ldo4_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO5", BD718XX_LDO5_VOLT, HW_STATE_CONTROL, BD718XX_LDO5_VOLT,
+ BD71837_LDO5_MASK, bd71837_ldo5_vranges, 0, false,
+ BD718XX_LDO_SEL),
+ BD_DATA("LDO6", BD718XX_LDO6_VOLT, HW_STATE_CONTROL, BD718XX_LDO6_VOLT,
+ BD718XX_LDO6_MASK, ldo6_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO7", BD71837_LDO7_VOLT, HW_STATE_CONTROL, BD71837_LDO7_VOLT,
+ BD71837_LDO7_MASK, ldo7_vranges, 0, false, BD718XX_LDO_SEL),
+};
+
+static struct bd71837_platdata bd71847_reg_data[] = {
+/* Bucks 1 and 2 which support dynamic voltage scaling */
+ BD_DATA("BUCK1", BD718XX_BUCK1_CTRL, HW_STATE_CONTROL,
+ BD718XX_BUCK1_VOLT_RUN, DVS_BUCK_RUN_MASK, dvs_buck_vranges, 0,
+ true, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK2", BD718XX_BUCK2_CTRL, HW_STATE_CONTROL,
+ BD718XX_BUCK2_VOLT_RUN, DVS_BUCK_RUN_MASK, dvs_buck_vranges, 0,
+ true, BD718XX_BUCK_SEL),
+/* Bucks 3-6 which do not support dynamic voltage scaling */
+ BD_DATA("BUCK3", BD718XX_1ST_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_1ST_NODVS_BUCK_VOLT, BD718XX_1ST_NODVS_BUCK_MASK,
+ bd71847_buck3_vranges, 0xc0, false, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK4", BD718XX_2ND_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_2ND_NODVS_BUCK_VOLT, BD71837_BUCK6_MASK,
+ bd71847_buck4_vranges, 0x40, false, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK5", BD718XX_3RD_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_3RD_NODVS_BUCK_VOLT, BD718XX_3RD_NODVS_BUCK_MASK,
+ nodvs_buck3_vranges, 0, false, BD718XX_BUCK_SEL),
+ BD_DATA("BUCK6", BD718XX_4TH_NODVS_BUCK_CTRL, HW_STATE_CONTROL,
+ BD718XX_4TH_NODVS_BUCK_VOLT, BD718XX_4TH_NODVS_BUCK_MASK,
+ nodvs_buck4_vranges, 0, false, BD718XX_BUCK_SEL),
+/* LDOs */
+ BD_DATA("LDO1", BD718XX_LDO1_VOLT, HW_STATE_CONTROL, BD718XX_LDO1_VOLT,
+ BD718XX_LDO1_MASK, ldo1_vranges, 0x20, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO2", BD718XX_LDO2_VOLT, HW_STATE_CONTROL, BD718XX_LDO2_VOLT,
+ BD718XX_LDO2_MASK, ldo2_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO3", BD718XX_LDO3_VOLT, HW_STATE_CONTROL, BD718XX_LDO3_VOLT,
+ BD718XX_LDO3_MASK, ldo3_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO4", BD718XX_LDO4_VOLT, HW_STATE_CONTROL, BD718XX_LDO4_VOLT,
+ BD718XX_LDO4_MASK, ldo4_vranges, 0, false, BD718XX_LDO_SEL),
+ BD_DATA("LDO5", BD718XX_LDO5_VOLT, HW_STATE_CONTROL, BD718XX_LDO5_VOLT,
+ BD71847_LDO5_MASK, bd71847_ldo5_vranges, 0x20, false,
+ BD718XX_LDO_SEL),
+ BD_DATA("LDO6", BD718XX_LDO6_VOLT, HW_STATE_CONTROL, BD718XX_LDO6_VOLT,
+ BD718XX_LDO6_MASK, ldo6_vranges, 0, false, BD718XX_LDO_SEL),
+};
+
+static int vrange_find_value(struct bd71837_vrange *r, unsigned int sel,
+ unsigned int *val)
+{
+ if (!val || sel < r->min_sel || sel > r->max_sel)
+ return -EINVAL;
+
+ *val = r->min_volt + r->step * (sel - r->min_sel);
+ return 0;
+}
+
+static int vrange_find_selector(struct bd71837_vrange *r, int val,
+ unsigned int *sel)
+{
+ int ret = -EINVAL;
+ int num_vals = r->max_sel - r->min_sel + 1;
+
+ if (val >= r->min_volt &&
+ val <= r->min_volt + r->step * (num_vals - 1)) {
+ if (r->step) {
+ *sel = r->min_sel + ((val - r->min_volt) / r->step);
+ ret = 0;
+ } else {
+ *sel = r->min_sel;
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+static int bd71837_get_enable(struct udevice *dev)
+{
+ int val;
+ struct bd71837_platdata *plat = dev_get_platdata(dev);
+
+ /*
+ * boot critical regulators on bd71837 must not be controlled by sw
+ * due to the 'feature' which leaves power rails down if bd71837 is
+ * reseted to snvs state. hence we can't get the state here.
+ *
+ * if we are alive it means we probably are on run state and
+ * if the regulator can't be controlled we can assume it is
+ * enabled.
+ */
+ if (plat->enablemask == HW_STATE_CONTROL)
+ return 1;
+
+ val = pmic_reg_read(dev->parent, plat->enable_reg);
+ if (val < 0)
+ return val;
+
+ return (val & plat->enablemask);
+}
+
+static int bd71837_set_enable(struct udevice *dev, bool enable)
+{
+ int val = 0;
+ struct bd71837_platdata *plat = dev_get_platdata(dev);
+
+ /*
+ * boot critical regulators on bd71837 must not be controlled by sw
+ * due to the 'feature' which leaves power rails down if bd71837 is
+ * reseted to snvs state. Hence we can't set the state here.
+ */
+ if (plat->enablemask == HW_STATE_CONTROL)
+ return -EINVAL;
+
+ if (enable)
+ val = plat->enablemask;
+
+ return pmic_clrsetbits(dev->parent, plat->enable_reg, plat->enablemask,
+ val);
+}
+
+static int bd71837_set_value(struct udevice *dev, int uvolt)
+{
+ unsigned int sel;
+ unsigned int range;
+ int i;
+ int found = 0;
+ struct bd71837_platdata *plat = dev_get_platdata(dev);
+
+ /*
+ * An under/overshooting may occur if voltage is changed for other
+ * regulators but buck 1,2,3 or 4 when regulator is enabled. Prevent
+ * change to protect the HW
+ */
+ if (!plat->dvs)
+ if (bd71837_get_enable(dev)) {
+ pr_err("Only DVS bucks can be changed when enabled\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < plat->numranges; i++) {
+ struct bd71837_vrange *r = &plat->ranges[i];
+
+ found = !vrange_find_selector(r, uvolt, &sel);
+ if (found) {
+ unsigned int tmp;
+
+ /*
+ * We require exactly the requested value to be
+ * supported - this can be changed later if needed
+ */
+ range = r->rangeval;
+ found = !vrange_find_value(r, sel, &tmp);
+ if (found && tmp == uvolt)
+ break;
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return -EINVAL;
+
+ sel <<= ffs(plat->volt_mask) - 1;
+
+ if (plat->rangemask)
+ sel |= range;
+
+ return pmic_clrsetbits(dev->parent, plat->volt_reg, plat->volt_mask |
+ plat->rangemask, sel);
+}
+
+static int bd71837_get_value(struct udevice *dev)
+{
+ unsigned int reg, range;
+ unsigned int tmp;
+ struct bd71837_platdata *plat = dev_get_platdata(dev);
+ int i;
+
+ reg = pmic_reg_read(dev->parent, plat->volt_reg);
+ if (((int)reg) < 0)
+ return reg;
+
+ range = reg & plat->rangemask;
+
+ reg &= plat->volt_mask;
+ reg >>= ffs(plat->volt_mask) - 1;
+
+ for (i = 0; i < plat->numranges; i++) {
+ struct bd71837_vrange *r = &plat->ranges[i];
+
+ if (plat->rangemask && ((plat->rangemask & range) !=
+ r->rangeval))
+ continue;
+
+ if (!vrange_find_value(r, reg, &tmp))
+ return tmp;
+ }
+
+ pr_err("Unknown voltage value read from pmic\n");
+
+ return -EINVAL;
+}
+
+static int bd71837_regulator_probe(struct udevice *dev)
+{
+ struct bd71837_platdata *plat = dev_get_platdata(dev);
+ int i, ret;
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ int type;
+ struct bd71837_platdata *init_data;
+ int data_amnt;
+
+ type = dev_get_driver_data(dev_get_parent(dev));
+
+ switch (type) {
+ case ROHM_CHIP_TYPE_BD71837:
+ init_data = bd71837_reg_data;
+ data_amnt = ARRAY_SIZE(bd71837_reg_data);
+ break;
+ case ROHM_CHIP_TYPE_BD71847:
+ init_data = bd71847_reg_data;
+ data_amnt = ARRAY_SIZE(bd71847_reg_data);
+ break;
+ default:
+ debug("Unknown PMIC type\n");
+ init_data = NULL;
+ data_amnt = 0;
+ break;
+ }
+
+ for (i = 0; i < data_amnt; i++) {
+ if (!strcmp(dev->name, init_data[i].name)) {
+ *plat = init_data[i];
+ if (plat->enablemask != HW_STATE_CONTROL) {
+ /*
+ * Take the regulator under SW control. Ensure
+ * the initial state matches dt flags and then
+ * write the SEL bit
+ */
+ uc_pdata = dev_get_uclass_platdata(dev);
+ ret = bd71837_set_enable(dev,
+ !!(uc_pdata->boot_on ||
+ uc_pdata->always_on));
+ if (ret)
+ return ret;
+
+ return pmic_clrsetbits(dev->parent,
+ plat->enable_reg,
+ plat->sel_mask,
+ plat->sel_mask);
+ }
+ return 0;
+ }
+ }
+
+ pr_err("Unknown regulator '%s'\n", dev->name);
+
+ return -ENOENT;
+}
+
+static const struct dm_regulator_ops bd71837_regulator_ops = {
+ .get_value = bd71837_get_value,
+ .set_value = bd71837_set_value,
+ .get_enable = bd71837_get_enable,
+ .set_enable = bd71837_set_enable,
+};
+
+U_BOOT_DRIVER(bd71837_regulator) = {
+ .name = BD718XX_REGULATOR_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &bd71837_regulator_ops,
+ .probe = bd71837_regulator_probe,
+ .platdata_auto_alloc_size = sizeof(struct bd71837_platdata),
+};
diff --git a/include/power/bd71837.h b/include/power/bd71837.h
index 38c69b2b90..75e07e1de3 100644
--- a/include/power/bd71837.h
+++ b/include/power/bd71837.h
@@ -1,62 +1,103 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (C) 2018 ROHM Semiconductors */
-#ifndef BD71837_H_
-#define BD71837_H_
+#ifndef BD718XX_H_
+#define BD718XX_H_
-#define BD71837_REGULATOR_DRIVER "bd71837_regulator"
+#define BD718XX_REGULATOR_DRIVER "bd718x7_regulator"
enum {
- BD71837_REV = 0x00,
- BD71837_SWRESET = 0x01,
- BD71837_I2C_DEV = 0x02,
- BD71837_PWRCTRL0 = 0x03,
- BD71837_PWRCTRL1 = 0x04,
- BD71837_BUCK1_CTRL = 0x05,
- BD71837_BUCK2_CTRL = 0x06,
- BD71837_BUCK3_CTRL = 0x07,
- BD71837_BUCK4_CTRL = 0x08,
- BD71837_BUCK5_CTRL = 0x09,
- BD71837_BUCK6_CTRL = 0x0a,
- BD71837_BUCK7_CTRL = 0x0b,
- BD71837_BUCK8_CTRL = 0x0c,
- BD71837_BUCK1_VOLT_RUN = 0x0d,
- BD71837_BUCK1_VOLT_IDLE = 0x0e,
- BD71837_BUCK1_VOLT_SUSP = 0x0f,
- BD71837_BUCK2_VOLT_RUN = 0x10,
- BD71837_BUCK2_VOLT_IDLE = 0x11,
- BD71837_BUCK3_VOLT_RUN = 0x12,
- BD71837_BUCK4_VOLT_RUN = 0x13,
- BD71837_BUCK5_VOLT = 0x14,
- BD71837_BUCK6_VOLT = 0x15,
- BD71837_BUCK7_VOLT = 0x16,
- BD71837_BUCK8_VOLT = 0x17,
- BD71837_LDO1_VOLT = 0x18,
- BD71837_LDO2_VOLT = 0x19,
- BD71837_LDO3_VOLT = 0x1a,
- BD71837_LDO4_VOLT = 0x1b,
- BD71837_LDO5_VOLT = 0x1c,
- BD71837_LDO6_VOLT = 0x1d,
- BD71837_LDO7_VOLT = 0x1e,
- BD71837_TRANS_COND0 = 0x1f,
- BD71837_TRANS_COND1 = 0x20,
- BD71837_VRFAULTEN = 0x21,
- BD71837_MVRFLTMASK0 = 0x22,
- BD71837_MVRFLTMASK1 = 0x23,
- BD71837_MVRFLTMASK2 = 0x24,
- BD71837_RCVCFG = 0x25,
- BD71837_RCVNUM = 0x26,
- BD71837_PWRONCONFIG0 = 0x27,
- BD71837_PWRONCONFIG1 = 0x28,
- BD71837_RESETSRC = 0x29,
- BD71837_MIRQ = 0x2a,
- BD71837_IRQ = 0x2b,
- BD71837_IN_MON = 0x2c,
- BD71837_POW_STATE = 0x2d,
- BD71837_OUT32K = 0x2e,
- BD71837_REGLOCK = 0x2f,
- BD71837_MUXSW_EN = 0x30,
- BD71837_REG_NUM,
+ ROHM_CHIP_TYPE_BD71837 = 0,
+ ROHM_CHIP_TYPE_BD71847,
+ ROHM_CHIP_TYPE_BD70528,
+ ROHM_CHIP_TYPE_AMOUNT
};
+enum {
+ BD718XX_REV = 0x00,
+ BD718XX_SWRESET = 0x01,
+ BD718XX_I2C_DEV = 0x02,
+ BD718XX_PWRCTRL0 = 0x03,
+ BD718XX_PWRCTRL1 = 0x04,
+ BD718XX_BUCK1_CTRL = 0x05,
+ BD718XX_BUCK2_CTRL = 0x06,
+ BD71837_BUCK3_CTRL = 0x07,
+ BD71837_BUCK4_CTRL = 0x08,
+ BD718XX_1ST_NODVS_BUCK_CTRL = 0x09,
+ BD718XX_2ND_NODVS_BUCK_CTRL = 0x0a,
+ BD718XX_3RD_NODVS_BUCK_CTRL = 0x0b,
+ BD718XX_4TH_NODVS_BUCK_CTRL = 0x0c,
+ BD718XX_BUCK1_VOLT_RUN = 0x0d,
+ BD718XX_BUCK1_VOLT_IDLE = 0x0e,
+ BD718XX_BUCK1_VOLT_SUSP = 0x0f,
+ BD718XX_BUCK2_VOLT_RUN = 0x10,
+ BD718XX_BUCK2_VOLT_IDLE = 0x11,
+ BD71837_BUCK3_VOLT_RUN = 0x12,
+ BD71837_BUCK4_VOLT_RUN = 0x13,
+ BD718XX_1ST_NODVS_BUCK_VOLT = 0x14,
+ BD718XX_2ND_NODVS_BUCK_VOLT = 0x15,
+ BD718XX_3RD_NODVS_BUCK_VOLT = 0x16,
+ BD718XX_4TH_NODVS_BUCK_VOLT = 0x17,
+ BD718XX_LDO1_VOLT = 0x18,
+ BD718XX_LDO2_VOLT = 0x19,
+ BD718XX_LDO3_VOLT = 0x1a,
+ BD718XX_LDO4_VOLT = 0x1b,
+ BD718XX_LDO5_VOLT = 0x1c,
+ BD718XX_LDO6_VOLT = 0x1d,
+ BD71837_LDO7_VOLT = 0x1e,
+ BD718XX_TRANS_COND0 = 0x1f,
+ BD718XX_TRANS_COND1 = 0x20,
+ BD718XX_VRFAULTEN = 0x21,
+ BD718XX_MVRFLTMASK0 = 0x22,
+ BD718XX_MVRFLTMASK1 = 0x23,
+ BD718XX_MVRFLTMASK2 = 0x24,
+ BD718XX_RCVCFG = 0x25,
+ BD718XX_RCVNUM = 0x26,
+ BD718XX_PWRONCONFIG0 = 0x27,
+ BD718XX_PWRONCONFIG1 = 0x28,
+ BD718XX_RESETSRC = 0x29,
+ BD718XX_MIRQ = 0x2a,
+ BD718XX_IRQ = 0x2b,
+ BD718XX_IN_MON = 0x2c,
+ BD718XX_POW_STATE = 0x2d,
+ BD718XX_OUT32K = 0x2e,
+ BD718XX_REGLOCK = 0x2f,
+ BD718XX_MUXSW_EN = 0x30,
+ BD718XX_REG_OTPVER = 0xff,
+ BD718XX_MAX_REGISTER = 0x100,
+};
+
+#define BD718XX_REGLOCK_PWRSEQ 0x1
+#define BD718XX_REGLOCK_VREG 0x10
+
+#define BD718XX_BUCK_EN 0x01
+#define BD718XX_LDO_EN 0x40
+#define BD718XX_BUCK_SEL 0x02
+#define BD718XX_LDO_SEL 0x80
+
+#define DVS_BUCK_RUN_MASK 0x3f
+#define BD718XX_1ST_NODVS_BUCK_MASK 0x07
+#define BD718XX_3RD_NODVS_BUCK_MASK 0x07
+#define BD718XX_4TH_NODVS_BUCK_MASK 0x3f
+
+#define BD71847_BUCK3_MASK 0x07
+#define BD71847_BUCK3_RANGE_MASK 0xc0
+#define BD71847_BUCK4_MASK 0x03
+#define BD71847_BUCK4_RANGE_MASK 0x40
+
+#define BD71837_BUCK5_RANGE_MASK 0x80
+#define BD71837_BUCK6_MASK 0x03
+
+#define BD718XX_LDO1_MASK 0x03
+#define BD718XX_LDO1_RANGE_MASK 0x20
+#define BD718XX_LDO2_MASK 0x20
+#define BD718XX_LDO3_MASK 0x0f
+#define BD718XX_LDO4_MASK 0x0f
+#define BD718XX_LDO6_MASK 0x0f
+
+#define BD71837_LDO5_MASK 0x0f
+#define BD71847_LDO5_MASK 0x0f
+#define BD71847_LDO5_RANGE_MASK 0x20
+#define BD71837_LDO7_MASK 0x0f
+
#endif
--
2.17.2
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
More information about the U-Boot
mailing list