--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * NXP PF9453 regulator driver
+ * Copyright 2024 NXP
+ */
+
+#include <dm.h>
+#include <errno.h>
+#include <log.h>
+#include <linux/bitops.h>
+#include <power/pf9453.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+
+/**
+ * struct pf9453_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 pf9453_vrange {
+ unsigned int min_volt;
+ unsigned int step;
+ u8 min_sel;
+ u8 max_sel;
+};
+
+/**
+ * struct pf9453_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
+ */
+struct pf9453_plat {
+ const char *name;
+ u8 enable_reg;
+ u8 enablemask;
+ u8 volt_reg;
+ u8 volt_mask;
+ struct pf9453_vrange *ranges;
+ unsigned int numranges;
+};
+
+#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, _numranges) \
+{ \
+ .name = (_name), .enable_reg = (enreg), .enablemask = (enmask), \
+ .volt_reg = (vreg), .volt_mask = (vmask), .ranges = (_range), \
+ .numranges = _numranges \
+}
+
+static struct pf9453_vrange pf9453_buck134_vranges[] = {
+ PCA_RANGE(600000, 25000, 0, 0x7f),
+};
+
+static struct pf9453_vrange pf9453_buck2_vranges[] = {
+ PCA_RANGE(600000, 12500, 0, 0x7f),
+};
+
+static struct pf9453_vrange pf9453_ldo1_vranges[] = {
+ PCA_RANGE(800000, 25000, 0x0, 0x64),
+};
+
+static struct pf9453_vrange pf9453_ldo2_vranges[] = {
+ PCA_RANGE(500000, 25000, 0x0, 0x3a),
+};
+
+static struct pf9453_vrange pf9453_ldosnvs_vranges[] = {
+ PCA_RANGE(800000, 25000, 0x0, 0x58),
+};
+
+static struct pf9453_plat pf9453_reg_data[] = {
+ PCA_DATA("BUCK1", PF9453_BUCK1CTRL, PF9453_EN_MODE_MASK,
+ PF9453_BUCK1OUT, PF9453_BUCK_RUN_MASK,
+ pf9453_buck134_vranges, ARRAY_SIZE(pf9453_buck134_vranges)),
+ PCA_DATA("BUCK2", PF9453_BUCK2CTRL, PF9453_EN_MODE_MASK,
+ PF9453_BUCK2OUT, PF9453_BUCK_RUN_MASK,
+ pf9453_buck2_vranges, ARRAY_SIZE(pf9453_buck2_vranges)),
+ PCA_DATA("BUCK3", PF9453_BUCK3CTRL, PF9453_EN_MODE_MASK,
+ PF9453_BUCK3OUT, PF9453_BUCK_RUN_MASK,
+ pf9453_buck134_vranges, ARRAY_SIZE(pf9453_buck134_vranges)),
+ PCA_DATA("BUCK4", PF9453_BUCK4CTRL, PF9453_EN_MODE_MASK,
+ PF9453_BUCK4OUT, PF9453_BUCK_RUN_MASK,
+ pf9453_buck134_vranges, ARRAY_SIZE(pf9453_buck134_vranges)),
+ /* LDOs */
+ PCA_DATA("LDO1", PF9453_LDO1CFG, PF9453_EN_MODE_MASK,
+ PF9453_LDO1OUT_H, PF9453_LDO1_MASK,
+ pf9453_ldo1_vranges, ARRAY_SIZE(pf9453_ldo1_vranges)),
+ PCA_DATA("LDO2", PF9453_LDO2CFG, PF9453_EN_MODE_MASK,
+ PF9453_LDO2OUT, PF9453_LDO2_MASK,
+ pf9453_ldo2_vranges, ARRAY_SIZE(pf9453_ldo2_vranges)),
+ PCA_DATA("LDO-SNVS", PF9453_LDOSNVS_CFG2, PF9453_EN_MODE_MASK,
+ PF9453_LDOSNVS_CFG1, PF9453_LDOSNVS_MASK,
+ pf9453_ldosnvs_vranges, ARRAY_SIZE(pf9453_ldosnvs_vranges)),
+};
+
+static int vrange_find_value(struct pf9453_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 pf9453_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 pf9453_get_enable(struct udevice *dev)
+{
+ struct pf9453_plat *plat = dev_get_plat(dev);
+ int val;
+
+ val = pmic_reg_read(dev->parent, plat->enable_reg);
+ if (val < 0)
+ return val;
+
+ return (val & plat->enablemask);
+}
+
+static int pf9453_set_enable(struct udevice *dev, bool enable)
+{
+ int val = 0;
+ struct pf9453_plat *plat = dev_get_plat(dev);
+
+ if (enable)
+ val = plat->enablemask;
+
+ return pmic_clrsetbits(dev->parent, plat->enable_reg, plat->enablemask,
+ val);
+}
+
+static int pf9453_get_value(struct udevice *dev)
+{
+ struct pf9453_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 pf9453_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 pf9453_set_value(struct udevice *dev, int uvolt)
+{
+ struct pf9453_plat *plat = dev_get_plat(dev);
+ unsigned int sel;
+ int i, found = 0;
+
+ for (i = 0; i < plat->numranges; i++) {
+ struct pf9453_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 pf9453_regulator_probe(struct udevice *dev)
+{
+ struct pf9453_plat *plat = dev_get_plat(dev);
+ int i, type;
+
+ type = dev_get_driver_data(dev_get_parent(dev));
+
+ if (type != NXP_CHIP_TYPE_PF9453) {
+ debug("Unknown PMIC type\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pf9453_reg_data); i++) {
+ if (strcmp(dev->name, pf9453_reg_data[i].name))
+ continue;
+ *plat = pf9453_reg_data[i];
+ return 0;
+ }
+
+ pr_err("Unknown regulator '%s'\n", dev->name);
+
+ return -ENOENT;
+}
+
+static const struct dm_regulator_ops pf9453_regulator_ops = {
+ .get_value = pf9453_get_value,
+ .set_value = pf9453_set_value,
+ .get_enable = pf9453_get_enable,
+ .set_enable = pf9453_set_enable,
+};
+
+U_BOOT_DRIVER(pf9453_regulator) = {
+ .name = PF9453_REGULATOR_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &pf9453_regulator_ops,
+ .probe = pf9453_regulator_probe,
+ .plat_auto = sizeof(struct pf9453_plat),
+};
projects / thirdparty / u-boot.git / commitdiff
