* [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match
@ 2022-04-24 21:40 Marek Vasut
2022-04-24 21:40 ` [PATCH v2 2/2] pmic: pca9450: Add regulator driver Marek Vasut
2022-05-09 12:40 ` [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match Marek Vasut
0 siblings, 2 replies; 8+ messages in thread
From: Marek Vasut @ 2022-04-24 21:40 UTC (permalink / raw)
To: u-boot; +Cc: Marek Vasut, Fabio Estevam, Peng Fan, Stefano Babic
The upstream DT regulators node subnodes are named BUCKn and LDOn,
the downstream DT regulators node subnodes are named buckn and ldon,
add the upstream match.
Reviewed-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
---
V2: Add RB by Fabio
---
drivers/power/pmic/pca9450.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/power/pmic/pca9450.c b/drivers/power/pmic/pca9450.c
index 2394b196c56..26c876c9c45 100644
--- a/drivers/power/pmic/pca9450.c
+++ b/drivers/power/pmic/pca9450.c
@@ -19,8 +19,10 @@ DECLARE_GLOBAL_DATA_PTR;
static const struct pmic_child_info pmic_children_info[] = {
/* buck */
{ .prefix = "b", .driver = PCA9450_REGULATOR_DRIVER},
+ { .prefix = "B", .driver = PCA9450_REGULATOR_DRIVER},
/* ldo */
{ .prefix = "l", .driver = PCA9450_REGULATOR_DRIVER},
+ { .prefix = "L", .driver = PCA9450_REGULATOR_DRIVER},
{ },
};
--
2.35.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 2/2] pmic: pca9450: Add regulator driver
2022-04-24 21:40 [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match Marek Vasut
@ 2022-04-24 21:40 ` Marek Vasut
2022-05-19 22:24 ` Tim Harvey
2022-05-09 12:40 ` [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match Marek Vasut
1 sibling, 1 reply; 8+ messages in thread
From: Marek Vasut @ 2022-04-24 21:40 UTC (permalink / raw)
To: u-boot; +Cc: Marek Vasut, Fabio Estevam, Peng Fan, Stefano Babic
Add PCA9450 regulator driver. This is complementary driver for the BUCKn
and LDOn regulators provided by the PCA9450 PMIC driver. Currently the
driver permits reading the settngs and configuring the BUCKn and LDOn
regulators.
Reviewed-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
---
V2: Add RB by Fabio
---
drivers/power/pmic/pca9450.c | 6 +-
drivers/power/regulator/Kconfig | 15 ++
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/pca9450.c | 333 ++++++++++++++++++++++++++++++
include/power/pca9450.h | 11 +
5 files changed, 363 insertions(+), 3 deletions(-)
create mode 100644 drivers/power/regulator/pca9450.c
diff --git a/drivers/power/pmic/pca9450.c b/drivers/power/pmic/pca9450.c
index 26c876c9c45..116ac49a8db 100644
--- a/drivers/power/pmic/pca9450.c
+++ b/drivers/power/pmic/pca9450.c
@@ -83,9 +83,9 @@ static struct dm_pmic_ops pca9450_ops = {
};
static const struct udevice_id pca9450_ids[] = {
- { .compatible = "nxp,pca9450a", .data = 0x25, },
- { .compatible = "nxp,pca9450b", .data = 0x25, },
- { .compatible = "nxp,pca9450c", .data = 0x25, },
+ { .compatible = "nxp,pca9450a", .data = NXP_CHIP_TYPE_PCA9450A, },
+ { .compatible = "nxp,pca9450b", .data = NXP_CHIP_TYPE_PCA9450BC, },
+ { .compatible = "nxp,pca9450c", .data = NXP_CHIP_TYPE_PCA9450BC, },
{ }
};
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index cd253b95f2f..d486bad6bdc 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -60,6 +60,21 @@ config SPL_DM_REGULATOR_BD71837
This config enables implementation of driver-model regulator uclass
features for regulators on ROHM BD71837 and BD71847 in SPL.
+config DM_REGULATOR_PCA9450
+ bool "Enable Driver Model for NXP PCA9450 regulators"
+ depends on DM_REGULATOR && DM_PMIC_PCA9450
+ help
+ This config enables implementation of driver-model regulator uclass
+ features for regulators on NXP PCA9450 PMICs. PCA9450 contains 6 bucks
+ and 5 LDOS. The driver implements get/set api for value and enable.
+
+config SPL_DM_REGULATOR_PCA9450
+ bool "Enable Driver Model for NXP PCA9450 regulators in SPL"
+ depends on DM_REGULATOR_PCA9450
+ help
+ This config enables implementation of driver-model regulator uclass
+ features for regulators on ROHM PCA9450 in SPL.
+
config DM_REGULATOR_DA9063
bool "Enable Driver Model for REGULATOR DA9063"
depends on DM_REGULATOR && DM_PMIC_DA9063
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index 4efb32a3228..d2d17f7aed0 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.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_$(SPL_)DM_REGULATOR_PCA9450) += pca9450.o
obj-$(CONFIG_$(SPL_)REGULATOR_PWM) += pwm_regulator.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_FAN53555) += fan53555.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_COMMON) += regulator_common.o
diff --git a/drivers/power/regulator/pca9450.c b/drivers/power/regulator/pca9450.c
new file mode 100644
index 00000000000..4847c9f90f0
--- /dev/null
+++ b/drivers/power/regulator/pca9450.c
@@ -0,0 +1,333 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * NXP PCA9450 regulator driver
+ * Copyright (C) 2022 Marek Vasut <marex@denx.de>
+ *
+ * Largely based on:
+ * ROHM BD71837 regulator driver
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <linux/bitops.h>
+#include <power/pca9450.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+
+#define HW_STATE_CONTROL 0
+#define DEBUG
+
+/**
+ * struct pca9450_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
+ */
+struct pca9450_vrange {
+ unsigned int min_volt;
+ unsigned int step;
+ u8 min_sel;
+ u8 max_sel;
+};
+
+/**
+ * struct pca9450_plat - 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
+ * @dvs: whether the voltage can be changed when regulator is enabled
+ */
+struct pca9450_plat {
+ const char *name;
+ u8 enable_reg;
+ u8 enablemask;
+ u8 volt_reg;
+ u8 volt_mask;
+ struct pca9450_vrange *ranges;
+ unsigned int numranges;
+ bool dvs;
+};
+
+#define PCA_RANGE(_min, _vstep, _sel_low, _sel_hi) \
+{ \
+ .min_volt = (_min), .step = (_vstep), \
+ .min_sel = (_sel_low), .max_sel = (_sel_hi), \
+}
+
+#define PCA_DATA(_name, enreg, enmask, vreg, vmask, _range, _dvs) \
+{ \
+ .name = (_name), .enable_reg = (enreg), .enablemask = (enmask), \
+ .volt_reg = (vreg), .volt_mask = (vmask), .ranges = (_range), \
+ .numranges = ARRAY_SIZE(_range), .dvs = (_dvs), \
+}
+
+static struct pca9450_vrange pca9450_buck123_vranges[] = {
+ PCA_RANGE(600000, 12500, 0, 0x7f),
+};
+
+static struct pca9450_vrange pca9450_buck456_vranges[] = {
+ PCA_RANGE(600000, 25000, 0, 0x70),
+ PCA_RANGE(3400000, 0, 0x71, 0x7f),
+};
+
+static struct pca9450_vrange pca9450_ldo1_vranges[] = {
+ PCA_RANGE(1600000, 100000, 0x0, 0x3),
+ PCA_RANGE(3000000, 100000, 0x4, 0x7),
+};
+
+static struct pca9450_vrange pca9450_ldo2_vranges[] = {
+ PCA_RANGE(800000, 50000, 0x0, 0x7),
+};
+
+static struct pca9450_vrange pca9450_ldo34_vranges[] = {
+ PCA_RANGE(800000, 100000, 0x0, 0x19),
+ PCA_RANGE(3300000, 0, 0x1a, 0x1f),
+};
+
+static struct pca9450_vrange pca9450_ldo5_vranges[] = {
+ PCA_RANGE(1800000, 100000, 0x0, 0xf),
+};
+
+/*
+ * 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 PCA9450
+ * is powering NXP i.MX8. In this use-case we (for now) only allow control
+ * for BUCK4, BUCK5, BUCK6 which are not boot critical.
+ */
+static struct pca9450_plat pca9450_reg_data[] = {
+ /* Bucks 1-3 which support dynamic voltage scaling */
+ PCA_DATA("BUCK1", PCA9450_BUCK1CTRL, HW_STATE_CONTROL,
+ PCA9450_BUCK1OUT_DVS0, DVS_BUCK_RUN_MASK,
+ pca9450_buck123_vranges, true),
+ PCA_DATA("BUCK2", PCA9450_BUCK2CTRL, HW_STATE_CONTROL,
+ PCA9450_BUCK2OUT_DVS0, DVS_BUCK_RUN_MASK,
+ pca9450_buck123_vranges, true),
+ PCA_DATA("BUCK3", PCA9450_BUCK3CTRL, HW_STATE_CONTROL,
+ PCA9450_BUCK3OUT_DVS0, DVS_BUCK_RUN_MASK,
+ pca9450_buck123_vranges, true),
+ /* Bucks 4-6 which do not support dynamic voltage scaling */
+ PCA_DATA("BUCK4", PCA9450_BUCK4CTRL, HW_STATE_CONTROL,
+ PCA9450_BUCK4OUT, DVS_BUCK_RUN_MASK,
+ pca9450_buck456_vranges, false),
+ PCA_DATA("BUCK5", PCA9450_BUCK5CTRL, HW_STATE_CONTROL,
+ PCA9450_BUCK5OUT, DVS_BUCK_RUN_MASK,
+ pca9450_buck456_vranges, false),
+ PCA_DATA("BUCK6", PCA9450_BUCK6CTRL, HW_STATE_CONTROL,
+ PCA9450_BUCK6OUT, DVS_BUCK_RUN_MASK,
+ pca9450_buck456_vranges, false),
+ /* LDOs */
+ PCA_DATA("LDO1", PCA9450_LDO1CTRL, HW_STATE_CONTROL,
+ PCA9450_LDO1CTRL, PCA9450_LDO12_MASK,
+ pca9450_ldo1_vranges, false),
+ PCA_DATA("LDO2", PCA9450_LDO2CTRL, HW_STATE_CONTROL,
+ PCA9450_LDO2CTRL, PCA9450_LDO12_MASK,
+ pca9450_ldo2_vranges, false),
+ PCA_DATA("LDO3", PCA9450_LDO3CTRL, HW_STATE_CONTROL,
+ PCA9450_LDO3CTRL, PCA9450_LDO34_MASK,
+ pca9450_ldo34_vranges, false),
+ PCA_DATA("LDO4", PCA9450_LDO4CTRL, HW_STATE_CONTROL,
+ PCA9450_LDO4CTRL, PCA9450_LDO34_MASK,
+ pca9450_ldo34_vranges, false),
+ PCA_DATA("LDO5", PCA9450_LDO5CTRL_H, HW_STATE_CONTROL,
+ PCA9450_LDO5CTRL_H, PCA9450_LDO5_MASK,
+ pca9450_ldo5_vranges, false),
+};
+
+static int vrange_find_value(struct pca9450_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 pca9450_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 pca9450_get_enable(struct udevice *dev)
+{
+ struct pca9450_plat *plat = dev_get_plat(dev);
+ int val;
+
+ /*
+ * boot critical regulators on pca9450 must not be controlled by sw
+ * due to the 'feature' which leaves power rails down if pca9450 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 pca9450_set_enable(struct udevice *dev, bool enable)
+{
+ int val = 0;
+ struct pca9450_plat *plat = dev_get_plat(dev);
+
+ /*
+ * boot critical regulators on pca9450 must not be controlled by sw
+ * due to the 'feature' which leaves power rails down if pca9450 is
+ * reseted to snvs state. Hence we can't set the state here.
+ */
+ if (plat->enablemask == HW_STATE_CONTROL)
+ return enable ? 0 : -EINVAL;
+
+ if (enable)
+ val = plat->enablemask;
+
+ return pmic_clrsetbits(dev->parent, plat->enable_reg, plat->enablemask,
+ val);
+}
+
+static int pca9450_get_value(struct udevice *dev)
+{
+ struct pca9450_plat *plat = dev_get_plat(dev);
+ unsigned int reg, tmp;
+ int i, ret;
+
+ ret = pmic_reg_read(dev->parent, plat->volt_reg);
+ if (ret < 0)
+ return ret;
+
+ reg = ret;
+ reg &= plat->volt_mask;
+
+ for (i = 0; i < plat->numranges; i++) {
+ struct pca9450_vrange *r = &plat->ranges[i];
+
+ if (!vrange_find_value(r, reg, &tmp))
+ return tmp;
+ }
+
+ pr_err("Unknown voltage value read from pmic\n");
+
+ return -EINVAL;
+}
+
+static int pca9450_set_value(struct udevice *dev, int uvolt)
+{
+ struct pca9450_plat *plat = dev_get_plat(dev);
+ unsigned int sel;
+ int i, found = 0;
+
+ /*
+ * 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 (pca9450_get_enable(dev)) {
+ /* If the value is already set, skip the warning. */
+ if (pca9450_get_value(dev) == uvolt)
+ return 0;
+ pr_err("Only DVS bucks can be changed when enabled\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < plat->numranges; i++) {
+ struct pca9450_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
+ */
+ found = !vrange_find_value(r, sel, &tmp);
+ if (found && tmp == uvolt)
+ break;
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return -EINVAL;
+
+ return pmic_clrsetbits(dev->parent, plat->volt_reg,
+ plat->volt_mask, sel);
+}
+
+static int pca9450_regulator_probe(struct udevice *dev)
+{
+ struct pca9450_plat *plat = dev_get_plat(dev);
+ int i, type;
+
+ type = dev_get_driver_data(dev_get_parent(dev));
+
+ if (type != NXP_CHIP_TYPE_PCA9450A && type != NXP_CHIP_TYPE_PCA9450BC) {
+ debug("Unknown PMIC type\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pca9450_reg_data); i++) {
+ if (strcmp(dev->name, pca9450_reg_data[i].name))
+ continue;
+
+ /* PCA9450B/PCA9450C uses BUCK1 and BUCK3 in dual-phase */
+ if (type == NXP_CHIP_TYPE_PCA9450BC &&
+ !strcmp(pca9450_reg_data[i].name, "BUCK3")) {
+ continue;
+ }
+
+ *plat = pca9450_reg_data[i];
+
+ return 0;
+ }
+
+ pr_err("Unknown regulator '%s'\n", dev->name);
+
+ return -ENOENT;
+}
+
+static const struct dm_regulator_ops pca9450_regulator_ops = {
+ .get_value = pca9450_get_value,
+ .set_value = pca9450_set_value,
+ .get_enable = pca9450_get_enable,
+ .set_enable = pca9450_set_enable,
+};
+
+U_BOOT_DRIVER(pca9450_regulator) = {
+ .name = PCA9450_REGULATOR_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &pca9450_regulator_ops,
+ .probe = pca9450_regulator_probe,
+ .plat_auto = sizeof(struct pca9450_plat),
+};
diff --git a/include/power/pca9450.h b/include/power/pca9450.h
index 27703bb1f91..b714fc3477d 100644
--- a/include/power/pca9450.h
+++ b/include/power/pca9450.h
@@ -56,4 +56,15 @@ enum {
int power_pca9450_init(unsigned char bus, unsigned char addr);
+enum {
+ NXP_CHIP_TYPE_PCA9450A = 0,
+ NXP_CHIP_TYPE_PCA9450BC,
+ NXP_CHIP_TYPE_AMOUNT
+};
+
+#define DVS_BUCK_RUN_MASK 0x7f
+#define PCA9450_LDO12_MASK 0x07
+#define PCA9450_LDO34_MASK 0x1f
+#define PCA9450_LDO5_MASK 0x0f
+
#endif
--
2.35.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match
2022-04-24 21:40 [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match Marek Vasut
2022-04-24 21:40 ` [PATCH v2 2/2] pmic: pca9450: Add regulator driver Marek Vasut
@ 2022-05-09 12:40 ` Marek Vasut
1 sibling, 0 replies; 8+ messages in thread
From: Marek Vasut @ 2022-05-09 12:40 UTC (permalink / raw)
To: u-boot; +Cc: Fabio Estevam, Peng Fan, Stefano Babic, Tom Rini
On 4/24/22 23:40, Marek Vasut wrote:
> The upstream DT regulators node subnodes are named BUCKn and LDOn,
> the downstream DT regulators node subnodes are named buckn and ldon,
> add the upstream match.
>
> Reviewed-by: Fabio Estevam <festevam@denx.de>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Fabio Estevam <festevam@denx.de>
> Cc: Peng Fan <peng.fan@nxp.com>
> Cc: Stefano Babic <sbabic@denx.de>
> ---
> V2: Add RB by Fabio
> ---
> drivers/power/pmic/pca9450.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/power/pmic/pca9450.c b/drivers/power/pmic/pca9450.c
> index 2394b196c56..26c876c9c45 100644
> --- a/drivers/power/pmic/pca9450.c
> +++ b/drivers/power/pmic/pca9450.c
> @@ -19,8 +19,10 @@ DECLARE_GLOBAL_DATA_PTR;
> static const struct pmic_child_info pmic_children_info[] = {
> /* buck */
> { .prefix = "b", .driver = PCA9450_REGULATOR_DRIVER},
> + { .prefix = "B", .driver = PCA9450_REGULATOR_DRIVER},
> /* ldo */
> { .prefix = "l", .driver = PCA9450_REGULATOR_DRIVER},
> + { .prefix = "L", .driver = PCA9450_REGULATOR_DRIVER},
> { },
> };
Can this be applied soon ?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] pmic: pca9450: Add regulator driver
2022-04-24 21:40 ` [PATCH v2 2/2] pmic: pca9450: Add regulator driver Marek Vasut
@ 2022-05-19 22:24 ` Tim Harvey
2022-05-20 3:12 ` Marek Vasut
2022-05-20 7:00 ` Stefano Babic
0 siblings, 2 replies; 8+ messages in thread
From: Tim Harvey @ 2022-05-19 22:24 UTC (permalink / raw)
To: Marek Vasut; +Cc: u-boot, Fabio Estevam, Peng Fan, Stefano Babic
On Sun, Apr 24, 2022 at 2:41 PM Marek Vasut <marex@denx.de> wrote:
>
> Add PCA9450 regulator driver. This is complementary driver for the BUCKn
> and LDOn regulators provided by the PCA9450 PMIC driver. Currently the
> driver permits reading the settngs and configuring the BUCKn and LDOn
> regulators.
>
> Reviewed-by: Fabio Estevam <festevam@denx.de>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Fabio Estevam <festevam@denx.de>
> Cc: Peng Fan <peng.fan@nxp.com>
> Cc: Stefano Babic <sbabic@denx.de>
> ---
> V2: Add RB by Fabio
> ---
> drivers/power/pmic/pca9450.c | 6 +-
> drivers/power/regulator/Kconfig | 15 ++
> drivers/power/regulator/Makefile | 1 +
> drivers/power/regulator/pca9450.c | 333 ++++++++++++++++++++++++++++++
> include/power/pca9450.h | 11 +
> 5 files changed, 363 insertions(+), 3 deletions(-)
> create mode 100644 drivers/power/regulator/pca9450.c
>
> diff --git a/drivers/power/pmic/pca9450.c b/drivers/power/pmic/pca9450.c
> index 26c876c9c45..116ac49a8db 100644
> --- a/drivers/power/pmic/pca9450.c
> +++ b/drivers/power/pmic/pca9450.c
> @@ -83,9 +83,9 @@ static struct dm_pmic_ops pca9450_ops = {
> };
>
> static const struct udevice_id pca9450_ids[] = {
> - { .compatible = "nxp,pca9450a", .data = 0x25, },
> - { .compatible = "nxp,pca9450b", .data = 0x25, },
> - { .compatible = "nxp,pca9450c", .data = 0x25, },
> + { .compatible = "nxp,pca9450a", .data = NXP_CHIP_TYPE_PCA9450A, },
> + { .compatible = "nxp,pca9450b", .data = NXP_CHIP_TYPE_PCA9450BC, },
> + { .compatible = "nxp,pca9450c", .data = NXP_CHIP_TYPE_PCA9450BC, },
> { }
> };
>
> diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
> index cd253b95f2f..d486bad6bdc 100644
> --- a/drivers/power/regulator/Kconfig
> +++ b/drivers/power/regulator/Kconfig
> @@ -60,6 +60,21 @@ config SPL_DM_REGULATOR_BD71837
> This config enables implementation of driver-model regulator uclass
> features for regulators on ROHM BD71837 and BD71847 in SPL.
>
> +config DM_REGULATOR_PCA9450
> + bool "Enable Driver Model for NXP PCA9450 regulators"
> + depends on DM_REGULATOR && DM_PMIC_PCA9450
> + help
> + This config enables implementation of driver-model regulator uclass
> + features for regulators on NXP PCA9450 PMICs. PCA9450 contains 6 bucks
> + and 5 LDOS. The driver implements get/set api for value and enable.
> +
> +config SPL_DM_REGULATOR_PCA9450
> + bool "Enable Driver Model for NXP PCA9450 regulators in SPL"
> + depends on DM_REGULATOR_PCA9450
> + help
> + This config enables implementation of driver-model regulator uclass
> + features for regulators on ROHM PCA9450 in SPL.
> +
> config DM_REGULATOR_DA9063
> bool "Enable Driver Model for REGULATOR DA9063"
> depends on DM_REGULATOR && DM_PMIC_DA9063
> diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
> index 4efb32a3228..d2d17f7aed0 100644
> --- a/drivers/power/regulator/Makefile
> +++ b/drivers/power/regulator/Makefile
> @@ -11,6 +11,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.o
> obj-$(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_)DM_REGULATOR_PCA9450) += pca9450.o
> obj-$(CONFIG_$(SPL_)REGULATOR_PWM) += pwm_regulator.o
> obj-$(CONFIG_$(SPL_)DM_REGULATOR_FAN53555) += fan53555.o
> obj-$(CONFIG_$(SPL_)DM_REGULATOR_COMMON) += regulator_common.o
> diff --git a/drivers/power/regulator/pca9450.c b/drivers/power/regulator/pca9450.c
> new file mode 100644
> index 00000000000..4847c9f90f0
> --- /dev/null
> +++ b/drivers/power/regulator/pca9450.c
> @@ -0,0 +1,333 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * NXP PCA9450 regulator driver
> + * Copyright (C) 2022 Marek Vasut <marex@denx.de>
> + *
> + * Largely based on:
> + * ROHM BD71837 regulator driver
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <log.h>
> +#include <linux/bitops.h>
> +#include <power/pca9450.h>
> +#include <power/pmic.h>
> +#include <power/regulator.h>
> +
> +#define HW_STATE_CONTROL 0
> +#define DEBUG
> +
> +/**
> + * struct pca9450_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
> + */
> +struct pca9450_vrange {
> + unsigned int min_volt;
> + unsigned int step;
> + u8 min_sel;
> + u8 max_sel;
> +};
> +
> +/**
> + * struct pca9450_plat - 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
> + * @dvs: whether the voltage can be changed when regulator is enabled
> + */
> +struct pca9450_plat {
> + const char *name;
> + u8 enable_reg;
> + u8 enablemask;
> + u8 volt_reg;
> + u8 volt_mask;
> + struct pca9450_vrange *ranges;
> + unsigned int numranges;
> + bool dvs;
> +};
> +
> +#define PCA_RANGE(_min, _vstep, _sel_low, _sel_hi) \
> +{ \
> + .min_volt = (_min), .step = (_vstep), \
> + .min_sel = (_sel_low), .max_sel = (_sel_hi), \
> +}
> +
> +#define PCA_DATA(_name, enreg, enmask, vreg, vmask, _range, _dvs) \
> +{ \
> + .name = (_name), .enable_reg = (enreg), .enablemask = (enmask), \
> + .volt_reg = (vreg), .volt_mask = (vmask), .ranges = (_range), \
> + .numranges = ARRAY_SIZE(_range), .dvs = (_dvs), \
> +}
> +
> +static struct pca9450_vrange pca9450_buck123_vranges[] = {
> + PCA_RANGE(600000, 12500, 0, 0x7f),
> +};
> +
> +static struct pca9450_vrange pca9450_buck456_vranges[] = {
> + PCA_RANGE(600000, 25000, 0, 0x70),
> + PCA_RANGE(3400000, 0, 0x71, 0x7f),
> +};
> +
> +static struct pca9450_vrange pca9450_ldo1_vranges[] = {
> + PCA_RANGE(1600000, 100000, 0x0, 0x3),
> + PCA_RANGE(3000000, 100000, 0x4, 0x7),
> +};
> +
> +static struct pca9450_vrange pca9450_ldo2_vranges[] = {
> + PCA_RANGE(800000, 50000, 0x0, 0x7),
> +};
> +
> +static struct pca9450_vrange pca9450_ldo34_vranges[] = {
> + PCA_RANGE(800000, 100000, 0x0, 0x19),
> + PCA_RANGE(3300000, 0, 0x1a, 0x1f),
> +};
> +
> +static struct pca9450_vrange pca9450_ldo5_vranges[] = {
> + PCA_RANGE(1800000, 100000, 0x0, 0xf),
> +};
> +
> +/*
> + * 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 PCA9450
> + * is powering NXP i.MX8. In this use-case we (for now) only allow control
> + * for BUCK4, BUCK5, BUCK6 which are not boot critical.
> + */
> +static struct pca9450_plat pca9450_reg_data[] = {
> + /* Bucks 1-3 which support dynamic voltage scaling */
> + PCA_DATA("BUCK1", PCA9450_BUCK1CTRL, HW_STATE_CONTROL,
> + PCA9450_BUCK1OUT_DVS0, DVS_BUCK_RUN_MASK,
> + pca9450_buck123_vranges, true),
> + PCA_DATA("BUCK2", PCA9450_BUCK2CTRL, HW_STATE_CONTROL,
> + PCA9450_BUCK2OUT_DVS0, DVS_BUCK_RUN_MASK,
> + pca9450_buck123_vranges, true),
> + PCA_DATA("BUCK3", PCA9450_BUCK3CTRL, HW_STATE_CONTROL,
> + PCA9450_BUCK3OUT_DVS0, DVS_BUCK_RUN_MASK,
> + pca9450_buck123_vranges, true),
> + /* Bucks 4-6 which do not support dynamic voltage scaling */
> + PCA_DATA("BUCK4", PCA9450_BUCK4CTRL, HW_STATE_CONTROL,
> + PCA9450_BUCK4OUT, DVS_BUCK_RUN_MASK,
> + pca9450_buck456_vranges, false),
> + PCA_DATA("BUCK5", PCA9450_BUCK5CTRL, HW_STATE_CONTROL,
> + PCA9450_BUCK5OUT, DVS_BUCK_RUN_MASK,
> + pca9450_buck456_vranges, false),
> + PCA_DATA("BUCK6", PCA9450_BUCK6CTRL, HW_STATE_CONTROL,
> + PCA9450_BUCK6OUT, DVS_BUCK_RUN_MASK,
> + pca9450_buck456_vranges, false),
> + /* LDOs */
> + PCA_DATA("LDO1", PCA9450_LDO1CTRL, HW_STATE_CONTROL,
> + PCA9450_LDO1CTRL, PCA9450_LDO12_MASK,
> + pca9450_ldo1_vranges, false),
> + PCA_DATA("LDO2", PCA9450_LDO2CTRL, HW_STATE_CONTROL,
> + PCA9450_LDO2CTRL, PCA9450_LDO12_MASK,
> + pca9450_ldo2_vranges, false),
> + PCA_DATA("LDO3", PCA9450_LDO3CTRL, HW_STATE_CONTROL,
> + PCA9450_LDO3CTRL, PCA9450_LDO34_MASK,
> + pca9450_ldo34_vranges, false),
> + PCA_DATA("LDO4", PCA9450_LDO4CTRL, HW_STATE_CONTROL,
> + PCA9450_LDO4CTRL, PCA9450_LDO34_MASK,
> + pca9450_ldo34_vranges, false),
> + PCA_DATA("LDO5", PCA9450_LDO5CTRL_H, HW_STATE_CONTROL,
> + PCA9450_LDO5CTRL_H, PCA9450_LDO5_MASK,
> + pca9450_ldo5_vranges, false),
> +};
> +
> +static int vrange_find_value(struct pca9450_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 pca9450_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 pca9450_get_enable(struct udevice *dev)
> +{
> + struct pca9450_plat *plat = dev_get_plat(dev);
> + int val;
> +
> + /*
> + * boot critical regulators on pca9450 must not be controlled by sw
> + * due to the 'feature' which leaves power rails down if pca9450 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 pca9450_set_enable(struct udevice *dev, bool enable)
> +{
> + int val = 0;
> + struct pca9450_plat *plat = dev_get_plat(dev);
> +
> + /*
> + * boot critical regulators on pca9450 must not be controlled by sw
> + * due to the 'feature' which leaves power rails down if pca9450 is
> + * reseted to snvs state. Hence we can't set the state here.
> + */
> + if (plat->enablemask == HW_STATE_CONTROL)
> + return enable ? 0 : -EINVAL;
> +
> + if (enable)
> + val = plat->enablemask;
> +
> + return pmic_clrsetbits(dev->parent, plat->enable_reg, plat->enablemask,
> + val);
> +}
> +
> +static int pca9450_get_value(struct udevice *dev)
> +{
> + struct pca9450_plat *plat = dev_get_plat(dev);
> + unsigned int reg, tmp;
> + int i, ret;
> +
> + ret = pmic_reg_read(dev->parent, plat->volt_reg);
> + if (ret < 0)
> + return ret;
> +
> + reg = ret;
> + reg &= plat->volt_mask;
> +
> + for (i = 0; i < plat->numranges; i++) {
> + struct pca9450_vrange *r = &plat->ranges[i];
> +
> + if (!vrange_find_value(r, reg, &tmp))
> + return tmp;
> + }
> +
> + pr_err("Unknown voltage value read from pmic\n");
> +
> + return -EINVAL;
> +}
> +
> +static int pca9450_set_value(struct udevice *dev, int uvolt)
> +{
> + struct pca9450_plat *plat = dev_get_plat(dev);
> + unsigned int sel;
> + int i, found = 0;
> +
> + /*
> + * 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 (pca9450_get_enable(dev)) {
> + /* If the value is already set, skip the warning. */
> + if (pca9450_get_value(dev) == uvolt)
> + return 0;
> + pr_err("Only DVS bucks can be changed when enabled\n");
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < plat->numranges; i++) {
> + struct pca9450_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
> + */
> + found = !vrange_find_value(r, sel, &tmp);
> + if (found && tmp == uvolt)
> + break;
> + found = 0;
> + }
> + }
> +
> + if (!found)
> + return -EINVAL;
> +
> + return pmic_clrsetbits(dev->parent, plat->volt_reg,
> + plat->volt_mask, sel);
> +}
> +
> +static int pca9450_regulator_probe(struct udevice *dev)
> +{
> + struct pca9450_plat *plat = dev_get_plat(dev);
> + int i, type;
> +
> + type = dev_get_driver_data(dev_get_parent(dev));
> +
> + if (type != NXP_CHIP_TYPE_PCA9450A && type != NXP_CHIP_TYPE_PCA9450BC) {
> + debug("Unknown PMIC type\n");
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(pca9450_reg_data); i++) {
> + if (strcmp(dev->name, pca9450_reg_data[i].name))
> + continue;
> +
> + /* PCA9450B/PCA9450C uses BUCK1 and BUCK3 in dual-phase */
> + if (type == NXP_CHIP_TYPE_PCA9450BC &&
> + !strcmp(pca9450_reg_data[i].name, "BUCK3")) {
> + continue;
> + }
> +
> + *plat = pca9450_reg_data[i];
> +
> + return 0;
> + }
> +
> + pr_err("Unknown regulator '%s'\n", dev->name);
> +
> + return -ENOENT;
> +}
> +
> +static const struct dm_regulator_ops pca9450_regulator_ops = {
> + .get_value = pca9450_get_value,
> + .set_value = pca9450_set_value,
> + .get_enable = pca9450_get_enable,
> + .set_enable = pca9450_set_enable,
> +};
> +
> +U_BOOT_DRIVER(pca9450_regulator) = {
> + .name = PCA9450_REGULATOR_DRIVER,
> + .id = UCLASS_REGULATOR,
> + .ops = &pca9450_regulator_ops,
> + .probe = pca9450_regulator_probe,
> + .plat_auto = sizeof(struct pca9450_plat),
> +};
> diff --git a/include/power/pca9450.h b/include/power/pca9450.h
> index 27703bb1f91..b714fc3477d 100644
> --- a/include/power/pca9450.h
> +++ b/include/power/pca9450.h
> @@ -56,4 +56,15 @@ enum {
>
> int power_pca9450_init(unsigned char bus, unsigned char addr);
>
> +enum {
> + NXP_CHIP_TYPE_PCA9450A = 0,
> + NXP_CHIP_TYPE_PCA9450BC,
> + NXP_CHIP_TYPE_AMOUNT
> +};
> +
> +#define DVS_BUCK_RUN_MASK 0x7f
Marek,
Looks like DVS_BUCK_RUN_MASK is a bad choice of names and should be
something like PCA9450_DVS_BUCK_RUN_MASK.
It's defined differently in include/power/bd71837.h (where it should
also likely be changed to something that doesn't collide)
$ git grep DVS_BUCK_RUN_MASK include/
include/power/bd71837.h:#define DVS_BUCK_RUN_MASK 0x3f
include/power/pca9450.h:#define DVS_BUCK_RUN_MASK 0x7f
Granted, board/gateworks/venice/spl.c is the only file I see that
includes both of those.
Is this merged yet?
Best Regards,
Tim
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] pmic: pca9450: Add regulator driver
2022-05-19 22:24 ` Tim Harvey
@ 2022-05-20 3:12 ` Marek Vasut
2022-05-20 7:00 ` Stefano Babic
1 sibling, 0 replies; 8+ messages in thread
From: Marek Vasut @ 2022-05-20 3:12 UTC (permalink / raw)
To: Tim Harvey; +Cc: u-boot, Fabio Estevam, Peng Fan, Stefano Babic
On 5/20/22 00:24, Tim Harvey wrote:
[...]
>> diff --git a/include/power/pca9450.h b/include/power/pca9450.h
>> index 27703bb1f91..b714fc3477d 100644
>> --- a/include/power/pca9450.h
>> +++ b/include/power/pca9450.h
>> @@ -56,4 +56,15 @@ enum {
>>
>> int power_pca9450_init(unsigned char bus, unsigned char addr);
>>
>> +enum {
>> + NXP_CHIP_TYPE_PCA9450A = 0,
>> + NXP_CHIP_TYPE_PCA9450BC,
>> + NXP_CHIP_TYPE_AMOUNT
>> +};
>> +
>> +#define DVS_BUCK_RUN_MASK 0x7f
>
> Marek,
>
> Looks like DVS_BUCK_RUN_MASK is a bad choice of names and should be
> something like PCA9450_DVS_BUCK_RUN_MASK.
>
> It's defined differently in include/power/bd71837.h (where it should
> also likely be changed to something that doesn't collide)
> $ git grep DVS_BUCK_RUN_MASK include/
> include/power/bd71837.h:#define DVS_BUCK_RUN_MASK 0x3f
> include/power/pca9450.h:#define DVS_BUCK_RUN_MASK 0x7f
>
> Granted, board/gateworks/venice/spl.c is the only file I see that
> includes both of those.
>
> Is this merged yet?
No, I am eagerly waiting for this to be merged.
I sent V3, that should address the ventana .
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] pmic: pca9450: Add regulator driver
2022-05-19 22:24 ` Tim Harvey
2022-05-20 3:12 ` Marek Vasut
@ 2022-05-20 7:00 ` Stefano Babic
2022-05-20 7:19 ` Marek Vasut
1 sibling, 1 reply; 8+ messages in thread
From: Stefano Babic @ 2022-05-20 7:00 UTC (permalink / raw)
To: Tim Harvey, Marek Vasut; +Cc: u-boot, Fabio Estevam, Peng Fan, Stefano Babic
Hi Tim, Marek,
On 20.05.22 00:24, Tim Harvey wrote:
> On Sun, Apr 24, 2022 at 2:41 PM Marek Vasut <marex@denx.de> wrote:
>>
>> Add PCA9450 regulator driver. This is complementary driver for the BUCKn
>> and LDOn regulators provided by the PCA9450 PMIC driver. Currently the
>> driver permits reading the settngs and configuring the BUCKn and LDOn
>> regulators.
>>
>> Reviewed-by: Fabio Estevam <festevam@denx.de>
>> Signed-off-by: Marek Vasut <marex@denx.de>
>> Cc: Fabio Estevam <festevam@denx.de>
>> Cc: Peng Fan <peng.fan@nxp.com>
>> Cc: Stefano Babic <sbabic@denx.de>
>> ---
>> V2: Add RB by Fabio
>> ---
>> drivers/power/pmic/pca9450.c | 6 +-
>> drivers/power/regulator/Kconfig | 15 ++
>> drivers/power/regulator/Makefile | 1 +
>> drivers/power/regulator/pca9450.c | 333 ++++++++++++++++++++++++++++++
>> include/power/pca9450.h | 11 +
>> 5 files changed, 363 insertions(+), 3 deletions(-)
>> create mode 100644 drivers/power/regulator/pca9450.c
>>
>> diff --git a/drivers/power/pmic/pca9450.c b/drivers/power/pmic/pca9450.c
>> index 26c876c9c45..116ac49a8db 100644
>> --- a/drivers/power/pmic/pca9450.c
>> +++ b/drivers/power/pmic/pca9450.c
>> @@ -83,9 +83,9 @@ static struct dm_pmic_ops pca9450_ops = {
>> };
>>
>> static const struct udevice_id pca9450_ids[] = {
>> - { .compatible = "nxp,pca9450a", .data = 0x25, },
>> - { .compatible = "nxp,pca9450b", .data = 0x25, },
>> - { .compatible = "nxp,pca9450c", .data = 0x25, },
>> + { .compatible = "nxp,pca9450a", .data = NXP_CHIP_TYPE_PCA9450A, },
>> + { .compatible = "nxp,pca9450b", .data = NXP_CHIP_TYPE_PCA9450BC, },
>> + { .compatible = "nxp,pca9450c", .data = NXP_CHIP_TYPE_PCA9450BC, },
>> { }
>> };
>>
>> diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
>> index cd253b95f2f..d486bad6bdc 100644
>> --- a/drivers/power/regulator/Kconfig
>> +++ b/drivers/power/regulator/Kconfig
>> @@ -60,6 +60,21 @@ config SPL_DM_REGULATOR_BD71837
>> This config enables implementation of driver-model regulator uclass
>> features for regulators on ROHM BD71837 and BD71847 in SPL.
>>
>> +config DM_REGULATOR_PCA9450
>> + bool "Enable Driver Model for NXP PCA9450 regulators"
>> + depends on DM_REGULATOR && DM_PMIC_PCA9450
>> + help
>> + This config enables implementation of driver-model regulator uclass
>> + features for regulators on NXP PCA9450 PMICs. PCA9450 contains 6 bucks
>> + and 5 LDOS. The driver implements get/set api for value and enable.
>> +
>> +config SPL_DM_REGULATOR_PCA9450
>> + bool "Enable Driver Model for NXP PCA9450 regulators in SPL"
>> + depends on DM_REGULATOR_PCA9450
>> + help
>> + This config enables implementation of driver-model regulator uclass
>> + features for regulators on ROHM PCA9450 in SPL.
>> +
>> config DM_REGULATOR_DA9063
>> bool "Enable Driver Model for REGULATOR DA9063"
>> depends on DM_REGULATOR && DM_PMIC_DA9063
>> diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
>> index 4efb32a3228..d2d17f7aed0 100644
>> --- a/drivers/power/regulator/Makefile
>> +++ b/drivers/power/regulator/Makefile
>> @@ -11,6 +11,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.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_$(SPL_)DM_REGULATOR_PCA9450) += pca9450.o
>> obj-$(CONFIG_$(SPL_)REGULATOR_PWM) += pwm_regulator.o
>> obj-$(CONFIG_$(SPL_)DM_REGULATOR_FAN53555) += fan53555.o
>> obj-$(CONFIG_$(SPL_)DM_REGULATOR_COMMON) += regulator_common.o
>> diff --git a/drivers/power/regulator/pca9450.c b/drivers/power/regulator/pca9450.c
>> new file mode 100644
>> index 00000000000..4847c9f90f0
>> --- /dev/null
>> +++ b/drivers/power/regulator/pca9450.c
>> @@ -0,0 +1,333 @@
>> +// SPDX-License-Identifier: GPL-2.0-or-later
>> +/*
>> + * NXP PCA9450 regulator driver
>> + * Copyright (C) 2022 Marek Vasut <marex@denx.de>
>> + *
>> + * Largely based on:
>> + * ROHM BD71837 regulator driver
>> + */
>> +
>> +#include <common.h>
>> +#include <dm.h>
>> +#include <log.h>
>> +#include <linux/bitops.h>
>> +#include <power/pca9450.h>
>> +#include <power/pmic.h>
>> +#include <power/regulator.h>
>> +
>> +#define HW_STATE_CONTROL 0
>> +#define DEBUG
>> +
>> +/**
>> + * struct pca9450_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
>> + */
>> +struct pca9450_vrange {
>> + unsigned int min_volt;
>> + unsigned int step;
>> + u8 min_sel;
>> + u8 max_sel;
>> +};
>> +
>> +/**
>> + * struct pca9450_plat - 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
>> + * @dvs: whether the voltage can be changed when regulator is enabled
>> + */
>> +struct pca9450_plat {
>> + const char *name;
>> + u8 enable_reg;
>> + u8 enablemask;
>> + u8 volt_reg;
>> + u8 volt_mask;
>> + struct pca9450_vrange *ranges;
>> + unsigned int numranges;
>> + bool dvs;
>> +};
>> +
>> +#define PCA_RANGE(_min, _vstep, _sel_low, _sel_hi) \
>> +{ \
>> + .min_volt = (_min), .step = (_vstep), \
>> + .min_sel = (_sel_low), .max_sel = (_sel_hi), \
>> +}
>> +
>> +#define PCA_DATA(_name, enreg, enmask, vreg, vmask, _range, _dvs) \
>> +{ \
>> + .name = (_name), .enable_reg = (enreg), .enablemask = (enmask), \
>> + .volt_reg = (vreg), .volt_mask = (vmask), .ranges = (_range), \
>> + .numranges = ARRAY_SIZE(_range), .dvs = (_dvs), \
>> +}
>> +
>> +static struct pca9450_vrange pca9450_buck123_vranges[] = {
>> + PCA_RANGE(600000, 12500, 0, 0x7f),
>> +};
>> +
>> +static struct pca9450_vrange pca9450_buck456_vranges[] = {
>> + PCA_RANGE(600000, 25000, 0, 0x70),
>> + PCA_RANGE(3400000, 0, 0x71, 0x7f),
>> +};
>> +
>> +static struct pca9450_vrange pca9450_ldo1_vranges[] = {
>> + PCA_RANGE(1600000, 100000, 0x0, 0x3),
>> + PCA_RANGE(3000000, 100000, 0x4, 0x7),
>> +};
>> +
>> +static struct pca9450_vrange pca9450_ldo2_vranges[] = {
>> + PCA_RANGE(800000, 50000, 0x0, 0x7),
>> +};
>> +
>> +static struct pca9450_vrange pca9450_ldo34_vranges[] = {
>> + PCA_RANGE(800000, 100000, 0x0, 0x19),
>> + PCA_RANGE(3300000, 0, 0x1a, 0x1f),
>> +};
>> +
>> +static struct pca9450_vrange pca9450_ldo5_vranges[] = {
>> + PCA_RANGE(1800000, 100000, 0x0, 0xf),
>> +};
>> +
>> +/*
>> + * 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 PCA9450
>> + * is powering NXP i.MX8. In this use-case we (for now) only allow control
>> + * for BUCK4, BUCK5, BUCK6 which are not boot critical.
>> + */
>> +static struct pca9450_plat pca9450_reg_data[] = {
>> + /* Bucks 1-3 which support dynamic voltage scaling */
>> + PCA_DATA("BUCK1", PCA9450_BUCK1CTRL, HW_STATE_CONTROL,
>> + PCA9450_BUCK1OUT_DVS0, DVS_BUCK_RUN_MASK,
>> + pca9450_buck123_vranges, true),
>> + PCA_DATA("BUCK2", PCA9450_BUCK2CTRL, HW_STATE_CONTROL,
>> + PCA9450_BUCK2OUT_DVS0, DVS_BUCK_RUN_MASK,
>> + pca9450_buck123_vranges, true),
>> + PCA_DATA("BUCK3", PCA9450_BUCK3CTRL, HW_STATE_CONTROL,
>> + PCA9450_BUCK3OUT_DVS0, DVS_BUCK_RUN_MASK,
>> + pca9450_buck123_vranges, true),
>> + /* Bucks 4-6 which do not support dynamic voltage scaling */
>> + PCA_DATA("BUCK4", PCA9450_BUCK4CTRL, HW_STATE_CONTROL,
>> + PCA9450_BUCK4OUT, DVS_BUCK_RUN_MASK,
>> + pca9450_buck456_vranges, false),
>> + PCA_DATA("BUCK5", PCA9450_BUCK5CTRL, HW_STATE_CONTROL,
>> + PCA9450_BUCK5OUT, DVS_BUCK_RUN_MASK,
>> + pca9450_buck456_vranges, false),
>> + PCA_DATA("BUCK6", PCA9450_BUCK6CTRL, HW_STATE_CONTROL,
>> + PCA9450_BUCK6OUT, DVS_BUCK_RUN_MASK,
>> + pca9450_buck456_vranges, false),
>> + /* LDOs */
>> + PCA_DATA("LDO1", PCA9450_LDO1CTRL, HW_STATE_CONTROL,
>> + PCA9450_LDO1CTRL, PCA9450_LDO12_MASK,
>> + pca9450_ldo1_vranges, false),
>> + PCA_DATA("LDO2", PCA9450_LDO2CTRL, HW_STATE_CONTROL,
>> + PCA9450_LDO2CTRL, PCA9450_LDO12_MASK,
>> + pca9450_ldo2_vranges, false),
>> + PCA_DATA("LDO3", PCA9450_LDO3CTRL, HW_STATE_CONTROL,
>> + PCA9450_LDO3CTRL, PCA9450_LDO34_MASK,
>> + pca9450_ldo34_vranges, false),
>> + PCA_DATA("LDO4", PCA9450_LDO4CTRL, HW_STATE_CONTROL,
>> + PCA9450_LDO4CTRL, PCA9450_LDO34_MASK,
>> + pca9450_ldo34_vranges, false),
>> + PCA_DATA("LDO5", PCA9450_LDO5CTRL_H, HW_STATE_CONTROL,
>> + PCA9450_LDO5CTRL_H, PCA9450_LDO5_MASK,
>> + pca9450_ldo5_vranges, false),
>> +};
>> +
>> +static int vrange_find_value(struct pca9450_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 pca9450_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 pca9450_get_enable(struct udevice *dev)
>> +{
>> + struct pca9450_plat *plat = dev_get_plat(dev);
>> + int val;
>> +
>> + /*
>> + * boot critical regulators on pca9450 must not be controlled by sw
>> + * due to the 'feature' which leaves power rails down if pca9450 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 pca9450_set_enable(struct udevice *dev, bool enable)
>> +{
>> + int val = 0;
>> + struct pca9450_plat *plat = dev_get_plat(dev);
>> +
>> + /*
>> + * boot critical regulators on pca9450 must not be controlled by sw
>> + * due to the 'feature' which leaves power rails down if pca9450 is
>> + * reseted to snvs state. Hence we can't set the state here.
>> + */
>> + if (plat->enablemask == HW_STATE_CONTROL)
>> + return enable ? 0 : -EINVAL;
>> +
>> + if (enable)
>> + val = plat->enablemask;
>> +
>> + return pmic_clrsetbits(dev->parent, plat->enable_reg, plat->enablemask,
>> + val);
>> +}
>> +
>> +static int pca9450_get_value(struct udevice *dev)
>> +{
>> + struct pca9450_plat *plat = dev_get_plat(dev);
>> + unsigned int reg, tmp;
>> + int i, ret;
>> +
>> + ret = pmic_reg_read(dev->parent, plat->volt_reg);
>> + if (ret < 0)
>> + return ret;
>> +
>> + reg = ret;
>> + reg &= plat->volt_mask;
>> +
>> + for (i = 0; i < plat->numranges; i++) {
>> + struct pca9450_vrange *r = &plat->ranges[i];
>> +
>> + if (!vrange_find_value(r, reg, &tmp))
>> + return tmp;
>> + }
>> +
>> + pr_err("Unknown voltage value read from pmic\n");
>> +
>> + return -EINVAL;
>> +}
>> +
>> +static int pca9450_set_value(struct udevice *dev, int uvolt)
>> +{
>> + struct pca9450_plat *plat = dev_get_plat(dev);
>> + unsigned int sel;
>> + int i, found = 0;
>> +
>> + /*
>> + * 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 (pca9450_get_enable(dev)) {
>> + /* If the value is already set, skip the warning. */
>> + if (pca9450_get_value(dev) == uvolt)
>> + return 0;
>> + pr_err("Only DVS bucks can be changed when enabled\n");
>> + return -EINVAL;
>> + }
>> +
>> + for (i = 0; i < plat->numranges; i++) {
>> + struct pca9450_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
>> + */
>> + found = !vrange_find_value(r, sel, &tmp);
>> + if (found && tmp == uvolt)
>> + break;
>> + found = 0;
>> + }
>> + }
>> +
>> + if (!found)
>> + return -EINVAL;
>> +
>> + return pmic_clrsetbits(dev->parent, plat->volt_reg,
>> + plat->volt_mask, sel);
>> +}
>> +
>> +static int pca9450_regulator_probe(struct udevice *dev)
>> +{
>> + struct pca9450_plat *plat = dev_get_plat(dev);
>> + int i, type;
>> +
>> + type = dev_get_driver_data(dev_get_parent(dev));
>> +
>> + if (type != NXP_CHIP_TYPE_PCA9450A && type != NXP_CHIP_TYPE_PCA9450BC) {
>> + debug("Unknown PMIC type\n");
>> + return -EINVAL;
>> + }
>> +
>> + for (i = 0; i < ARRAY_SIZE(pca9450_reg_data); i++) {
>> + if (strcmp(dev->name, pca9450_reg_data[i].name))
>> + continue;
>> +
>> + /* PCA9450B/PCA9450C uses BUCK1 and BUCK3 in dual-phase */
>> + if (type == NXP_CHIP_TYPE_PCA9450BC &&
>> + !strcmp(pca9450_reg_data[i].name, "BUCK3")) {
>> + continue;
>> + }
>> +
>> + *plat = pca9450_reg_data[i];
>> +
>> + return 0;
>> + }
>> +
>> + pr_err("Unknown regulator '%s'\n", dev->name);
>> +
>> + return -ENOENT;
>> +}
>> +
>> +static const struct dm_regulator_ops pca9450_regulator_ops = {
>> + .get_value = pca9450_get_value,
>> + .set_value = pca9450_set_value,
>> + .get_enable = pca9450_get_enable,
>> + .set_enable = pca9450_set_enable,
>> +};
>> +
>> +U_BOOT_DRIVER(pca9450_regulator) = {
>> + .name = PCA9450_REGULATOR_DRIVER,
>> + .id = UCLASS_REGULATOR,
>> + .ops = &pca9450_regulator_ops,
>> + .probe = pca9450_regulator_probe,
>> + .plat_auto = sizeof(struct pca9450_plat),
>> +};
>> diff --git a/include/power/pca9450.h b/include/power/pca9450.h
>> index 27703bb1f91..b714fc3477d 100644
>> --- a/include/power/pca9450.h
>> +++ b/include/power/pca9450.h
>> @@ -56,4 +56,15 @@ enum {
>>
>> int power_pca9450_init(unsigned char bus, unsigned char addr);
>>
>> +enum {
>> + NXP_CHIP_TYPE_PCA9450A = 0,
>> + NXP_CHIP_TYPE_PCA9450BC,
>> + NXP_CHIP_TYPE_AMOUNT
>> +};
>> +
>> +#define DVS_BUCK_RUN_MASK 0x7f
>
> Marek,
>
> Looks like DVS_BUCK_RUN_MASK is a bad choice of names and should be
> something like PCA9450_DVS_BUCK_RUN_MASK.
>
You have anticipated me - DVS_BUCK_RUN_MASK is redefined and breaks CI.
https://source.denx.de/u-boot/custodians/u-boot-imx/-/jobs/436881
> It's defined differently in include/power/bd71837.h (where it should
> also likely be changed to something that doesn't collide)
> $ git grep DVS_BUCK_RUN_MASK include/
> include/power/bd71837.h:#define DVS_BUCK_RUN_MASK 0x3f
> include/power/pca9450.h:#define DVS_BUCK_RUN_MASK 0x7f
>
> Granted, board/gateworks/venice/spl.c is the only file I see that
> includes both of those.
>
> Is this merged yet?
No, I set in patchworks that a new version is needed.
Regards,
Stefano
>
> Best Regards,
>
> Tim
--
=====================================================================
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic@denx.de
=====================================================================
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] pmic: pca9450: Add regulator driver
2022-05-20 7:00 ` Stefano Babic
@ 2022-05-20 7:19 ` Marek Vasut
2022-05-20 7:26 ` Stefano Babic
0 siblings, 1 reply; 8+ messages in thread
From: Marek Vasut @ 2022-05-20 7:19 UTC (permalink / raw)
To: Stefano Babic, Tim Harvey; +Cc: u-boot, Fabio Estevam, Peng Fan
On 5/20/22 09:00, Stefano Babic wrote:
> Hi Tim, Marek,
Hi,
>> It's defined differently in include/power/bd71837.h (where it should
>> also likely be changed to something that doesn't collide)
>> $ git grep DVS_BUCK_RUN_MASK include/
>> include/power/bd71837.h:#define DVS_BUCK_RUN_MASK 0x3f
>> include/power/pca9450.h:#define DVS_BUCK_RUN_MASK 0x7f
>>
>> Granted, board/gateworks/venice/spl.c is the only file I see that
>> includes both of those.
>>
>> Is this merged yet?
>
> No, I set in patchworks that a new version is needed.
Just to be sure this won't miss another MR, there is already V3 posted
and you are explicitly in To:
[PATCH v3 1/2] pmic: pca9450: Add upstream regulators subnode match
[PATCH v3 2/2] pmic: pca9450: Add regulator driver
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] pmic: pca9450: Add regulator driver
2022-05-20 7:19 ` Marek Vasut
@ 2022-05-20 7:26 ` Stefano Babic
0 siblings, 0 replies; 8+ messages in thread
From: Stefano Babic @ 2022-05-20 7:26 UTC (permalink / raw)
To: Marek Vasut, Stefano Babic, Tim Harvey; +Cc: u-boot, Fabio Estevam, Peng Fan
On 20.05.22 09:19, Marek Vasut wrote:
> On 5/20/22 09:00, Stefano Babic wrote:
>> Hi Tim, Marek,
>
> Hi,
>
>>> It's defined differently in include/power/bd71837.h (where it should
>>> also likely be changed to something that doesn't collide)
>>> $ git grep DVS_BUCK_RUN_MASK include/
>>> include/power/bd71837.h:#define DVS_BUCK_RUN_MASK 0x3f
>>> include/power/pca9450.h:#define DVS_BUCK_RUN_MASK 0x7f
>>>
>>> Granted, board/gateworks/venice/spl.c is the only file I see that
>>> includes both of those.
>>>
>>> Is this merged yet?
>>
>> No, I set in patchworks that a new version is needed.
>
> Just to be sure this won't miss another MR, there is already V3 posted
> and you are explicitly in To:
>
> [PATCH v3 1/2] pmic: pca9450: Add upstream regulators subnode match
> [PATCH v3 2/2] pmic: pca9450: Add regulator driver
Sure, I applied this to my test branch.
Stefano
--
=====================================================================
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic@denx.de
=====================================================================
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2022-05-20 7:26 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-24 21:40 [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match Marek Vasut
2022-04-24 21:40 ` [PATCH v2 2/2] pmic: pca9450: Add regulator driver Marek Vasut
2022-05-19 22:24 ` Tim Harvey
2022-05-20 3:12 ` Marek Vasut
2022-05-20 7:00 ` Stefano Babic
2022-05-20 7:19 ` Marek Vasut
2022-05-20 7:26 ` Stefano Babic
2022-05-09 12:40 ` [PATCH v2 1/2] pmic: pca9450: Add upstream regulators subnode match Marek Vasut
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