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b29f42c662
'id' is an enum, thus cast of pointer on 64-bit compile test with W=1 causes: max77857-regulator.c:56:24: error: cast to smaller integer type 'enum max77857_id' from 'void *' [-Werror,-Wvoid-pointer-to-enum-cast] Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230810111914.204847-2-krzysztof.kozlowski@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
462 lines
12 KiB
C
462 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2023 Analog Devices, Inc.
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* ADI Regulator driver for the MAX77857
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* MAX77859 and MAX77831.
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*/
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#include <linux/bitfield.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/util_macros.h>
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#define MAX77857_REG_INT_SRC 0x10
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#define MAX77857_REG_INT_MASK 0x11
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#define MAX77857_REG_CONT1 0x12
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#define MAX77857_REG_CONT2 0x13
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#define MAX77857_REG_CONT3 0x14
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#define MAX77857_INT_SRC_OCP BIT(0)
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#define MAX77857_INT_SRC_THS BIT(1)
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#define MAX77857_INT_SRC_HARDSHORT BIT(2)
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#define MAX77857_INT_SRC_OVP BIT(3)
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#define MAX77857_INT_SRC_POK BIT(4)
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#define MAX77857_ILIM_MASK GENMASK(2, 0)
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#define MAX77857_CONT1_FREQ GENMASK(4, 3)
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#define MAX77857_CONT3_FPWM BIT(5)
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#define MAX77859_REG_INT_SRC 0x11
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#define MAX77859_REG_CONT1 0x13
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#define MAX77859_REG_CONT2 0x14
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#define MAX77859_REG_CONT3 0x15
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#define MAX77859_REG_CONT5 0x17
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#define MAX77859_CONT2_FPWM BIT(2)
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#define MAX77859_CONT2_INTB BIT(3)
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#define MAX77859_CONT3_DVS_START BIT(2)
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#define MAX77859_VOLTAGE_SEL_MASK GENMASK(9, 0)
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#define MAX77859_CURRENT_MIN 1000000
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#define MAX77859_CURRENT_MAX 5000000
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#define MAX77859_CURRENT_STEP 50000
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enum max77857_id {
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ID_MAX77831 = 1,
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ID_MAX77857,
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ID_MAX77859,
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ID_MAX77859A,
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};
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static bool max77857_volatile_reg(struct device *dev, unsigned int reg)
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{
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enum max77857_id id = (uintptr_t)dev_get_drvdata(dev);
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switch (id) {
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case ID_MAX77831:
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case ID_MAX77857:
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return reg == MAX77857_REG_INT_SRC;
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case ID_MAX77859:
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case ID_MAX77859A:
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return reg == MAX77859_REG_INT_SRC;
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default:
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return true;
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}
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}
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static struct regmap_config max77857_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.cache_type = REGCACHE_MAPLE,
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.volatile_reg = max77857_volatile_reg,
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};
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static int max77857_get_status(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, MAX77857_REG_INT_SRC, &val);
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if (ret)
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return ret;
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if (FIELD_GET(MAX77857_INT_SRC_POK, val))
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return REGULATOR_STATUS_ON;
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return REGULATOR_STATUS_ERROR;
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}
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static unsigned int max77857_get_mode(struct regulator_dev *rdev)
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{
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enum max77857_id id = (uintptr_t)rdev_get_drvdata(rdev);
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unsigned int regval;
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int ret;
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switch (id) {
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case ID_MAX77831:
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case ID_MAX77857:
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ret = regmap_read(rdev->regmap, MAX77857_REG_CONT3, ®val);
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if (ret)
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return ret;
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if (FIELD_GET(MAX77857_CONT3_FPWM, regval))
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return REGULATOR_MODE_FAST;
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break;
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case ID_MAX77859:
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case ID_MAX77859A:
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ret = regmap_read(rdev->regmap, MAX77859_REG_CONT2, ®val);
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if (ret)
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return ret;
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if (FIELD_GET(MAX77859_CONT2_FPWM, regval))
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return REGULATOR_MODE_FAST;
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break;
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default:
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return -EINVAL;
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}
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return REGULATOR_MODE_NORMAL;
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}
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static int max77857_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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enum max77857_id id = (uintptr_t)rdev_get_drvdata(rdev);
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unsigned int reg, val;
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switch (id) {
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case ID_MAX77831:
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case ID_MAX77857:
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reg = MAX77857_REG_CONT3;
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val = MAX77857_CONT3_FPWM;
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break;
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case ID_MAX77859:
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case ID_MAX77859A:
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reg = MAX77859_REG_CONT2;
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val = MAX77859_CONT2_FPWM;
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break;
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default:
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return -EINVAL;
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}
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switch (mode) {
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case REGULATOR_MODE_FAST:
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return regmap_set_bits(rdev->regmap, reg, val);
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case REGULATOR_MODE_NORMAL:
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return regmap_clear_bits(rdev->regmap, reg, val);
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default:
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return -EINVAL;
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}
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}
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static int max77857_get_error_flags(struct regulator_dev *rdev,
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unsigned int *flags)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, MAX77857_REG_INT_SRC, &val);
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if (ret)
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return ret;
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*flags = 0;
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if (FIELD_GET(MAX77857_INT_SRC_OVP, val))
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*flags |= REGULATOR_ERROR_OVER_VOLTAGE_WARN;
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if (FIELD_GET(MAX77857_INT_SRC_OCP, val) ||
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FIELD_GET(MAX77857_INT_SRC_HARDSHORT, val))
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*flags |= REGULATOR_ERROR_OVER_CURRENT;
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if (FIELD_GET(MAX77857_INT_SRC_THS, val))
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*flags |= REGULATOR_ERROR_OVER_TEMP;
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if (!FIELD_GET(MAX77857_INT_SRC_POK, val))
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*flags |= REGULATOR_ERROR_FAIL;
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return 0;
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}
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static struct linear_range max77859_lin_ranges[] = {
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REGULATOR_LINEAR_RANGE(3200000, 0x0A0, 0x320, 20000)
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};
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static const unsigned int max77859_ramp_table[4] = {
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1000, 500, 250, 125
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};
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static int max77859_set_voltage_sel(struct regulator_dev *rdev,
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unsigned int sel)
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{
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__be16 reg;
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int ret;
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reg = cpu_to_be16(sel);
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ret = regmap_bulk_write(rdev->regmap, MAX77859_REG_CONT3, ®, 2);
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if (ret)
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return ret;
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/* actually apply new voltage */
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return regmap_set_bits(rdev->regmap, MAX77859_REG_CONT3,
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MAX77859_CONT3_DVS_START);
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}
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static int max77859_get_voltage_sel(struct regulator_dev *rdev)
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{
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__be16 reg;
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int ret;
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ret = regmap_bulk_read(rdev->regmap, MAX77859_REG_CONT3, ®, 2);
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if (ret)
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return ret;
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return FIELD_GET(MAX77859_VOLTAGE_SEL_MASK, __be16_to_cpu(reg));
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}
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static int max77859_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA)
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{
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u32 selector;
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if (max_uA < MAX77859_CURRENT_MIN)
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return -EINVAL;
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selector = 0x12 + (max_uA - MAX77859_CURRENT_MIN) / MAX77859_CURRENT_STEP;
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selector = clamp_val(selector, 0x00, 0x7F);
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return regmap_write(rdev->regmap, MAX77859_REG_CONT5, selector);
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}
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static int max77859_get_current_limit(struct regulator_dev *rdev)
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{
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u32 selector;
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int ret;
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ret = regmap_read(rdev->regmap, MAX77859_REG_CONT5, &selector);
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if (ret)
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return ret;
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if (selector <= 0x12)
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return MAX77859_CURRENT_MIN;
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if (selector >= 0x64)
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return MAX77859_CURRENT_MAX;
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return MAX77859_CURRENT_MIN + (selector - 0x12) * MAX77859_CURRENT_STEP;
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}
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static const struct regulator_ops max77859_regulator_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = max77859_set_voltage_sel,
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.get_voltage_sel = max77859_get_voltage_sel,
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.set_ramp_delay = regulator_set_ramp_delay_regmap,
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.get_status = max77857_get_status,
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.set_mode = max77857_set_mode,
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.get_mode = max77857_get_mode,
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.get_error_flags = max77857_get_error_flags,
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};
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static const struct regulator_ops max77859a_regulator_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = max77859_set_voltage_sel,
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.get_voltage_sel = max77859_get_voltage_sel,
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.set_current_limit = max77859_set_current_limit,
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.get_current_limit = max77859_get_current_limit,
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.set_ramp_delay = regulator_set_ramp_delay_regmap,
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.get_status = max77857_get_status,
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.set_mode = max77857_set_mode,
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.get_mode = max77857_get_mode,
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.get_error_flags = max77857_get_error_flags,
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};
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static const struct regulator_ops max77857_regulator_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_ramp_delay = regulator_set_ramp_delay_regmap,
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.get_status = max77857_get_status,
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.set_mode = max77857_set_mode,
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.get_mode = max77857_get_mode,
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.get_error_flags = max77857_get_error_flags,
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};
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static struct linear_range max77857_lin_ranges[] = {
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REGULATOR_LINEAR_RANGE(4485000, 0x3D, 0xCC, 73500)
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};
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static const unsigned int max77857_switch_freq[] = {
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1200000, 1500000, 1800000, 2100000
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};
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#define RAMAP_DELAY_INIT_VAL 1333
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static const unsigned int max77857_ramp_table[2][4] = {
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{ RAMAP_DELAY_INIT_VAL, 667, 333, 227 }, /* when switch freq is 1.8MHz or 2.1MHz */
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{ 1166, 667, 333, 167 }, /* when switch freq is 1.2MHz or 1.5MHz */
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};
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static struct regulator_desc max77857_regulator_desc = {
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.ops = &max77857_regulator_ops,
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.name = "max77857",
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.linear_ranges = max77857_lin_ranges,
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.n_linear_ranges = ARRAY_SIZE(max77857_lin_ranges),
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.vsel_mask = 0xFF,
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.vsel_reg = MAX77857_REG_CONT2,
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.ramp_delay_table = max77857_ramp_table[0],
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.n_ramp_values = ARRAY_SIZE(max77857_ramp_table[0]),
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.ramp_reg = MAX77857_REG_CONT3,
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.ramp_mask = GENMASK(1, 0),
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.ramp_delay = RAMAP_DELAY_INIT_VAL,
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.owner = THIS_MODULE,
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};
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static void max77857_calc_range(struct device *dev, enum max77857_id id)
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{
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struct linear_range *range;
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unsigned long vref_step;
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u32 rtop = 0;
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u32 rbot = 0;
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device_property_read_u32(dev, "adi,rtop-ohms", &rtop);
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device_property_read_u32(dev, "adi,rbot-ohms", &rbot);
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if (!rbot || !rtop)
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return;
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switch (id) {
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case ID_MAX77831:
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case ID_MAX77857:
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range = max77857_lin_ranges;
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vref_step = 4900UL;
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break;
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case ID_MAX77859:
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case ID_MAX77859A:
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range = max77859_lin_ranges;
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vref_step = 1250UL;
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break;
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}
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range->step = DIV_ROUND_CLOSEST(vref_step * (rbot + rtop), rbot);
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range->min = range->step * range->min_sel;
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}
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static int max77857_probe(struct i2c_client *client)
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{
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const struct i2c_device_id *i2c_id;
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struct device *dev = &client->dev;
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struct regulator_config cfg = { };
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struct regulator_dev *rdev;
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struct regmap *regmap;
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enum max77857_id id;
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u32 switch_freq = 0;
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int ret;
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i2c_id = i2c_client_get_device_id(client);
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if (!i2c_id)
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return -EINVAL;
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id = i2c_id->driver_data;
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dev_set_drvdata(dev, (void *)id);
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if (id == ID_MAX77859 || id == ID_MAX77859A) {
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max77857_regulator_desc.ops = &max77859_regulator_ops;
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max77857_regulator_desc.linear_ranges = max77859_lin_ranges;
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max77857_regulator_desc.ramp_delay_table = max77859_ramp_table;
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max77857_regulator_desc.ramp_delay = max77859_ramp_table[0];
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}
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if (id == ID_MAX77859A)
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max77857_regulator_desc.ops = &max77859a_regulator_ops;
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max77857_calc_range(dev, id);
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regmap = devm_regmap_init_i2c(client, &max77857_regmap_config);
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if (IS_ERR(regmap))
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return dev_err_probe(dev, PTR_ERR(regmap),
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"cannot initialize regmap\n");
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device_property_read_u32(dev, "adi,switch-frequency-hz", &switch_freq);
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if (switch_freq) {
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switch_freq = find_closest(switch_freq, max77857_switch_freq,
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ARRAY_SIZE(max77857_switch_freq));
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if (id == ID_MAX77831 && switch_freq == 3)
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switch_freq = 2;
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switch (id) {
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case ID_MAX77831:
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case ID_MAX77857:
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ret = regmap_update_bits(regmap, MAX77857_REG_CONT1,
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MAX77857_CONT1_FREQ, switch_freq);
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if (switch_freq >= 2)
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break;
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max77857_regulator_desc.ramp_delay_table = max77857_ramp_table[1];
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max77857_regulator_desc.ramp_delay = max77857_ramp_table[1][0];
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break;
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case ID_MAX77859:
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case ID_MAX77859A:
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ret = regmap_update_bits(regmap, MAX77859_REG_CONT1,
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MAX77857_CONT1_FREQ, switch_freq);
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break;
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}
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if (ret)
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return ret;
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}
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cfg.dev = dev;
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cfg.driver_data = (void *)id;
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cfg.regmap = regmap;
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cfg.init_data = of_get_regulator_init_data(dev, dev->of_node,
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&max77857_regulator_desc);
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if (!cfg.init_data)
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return -ENOMEM;
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rdev = devm_regulator_register(dev, &max77857_regulator_desc, &cfg);
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if (IS_ERR(rdev))
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return dev_err_probe(dev, PTR_ERR(rdev),
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"cannot register regulator\n");
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return 0;
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}
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const struct i2c_device_id max77857_id[] = {
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{ "max77831", ID_MAX77831 },
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{ "max77857", ID_MAX77857 },
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{ "max77859", ID_MAX77859 },
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{ "max77859a", ID_MAX77859A },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max77857_id);
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static const struct of_device_id max77857_of_id[] = {
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{ .compatible = "adi,max77831", .data = (void *)ID_MAX77831 },
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{ .compatible = "adi,max77857", .data = (void *)ID_MAX77857 },
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{ .compatible = "adi,max77859", .data = (void *)ID_MAX77859 },
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{ .compatible = "adi,max77859a", .data = (void *)ID_MAX77859A },
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{ }
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};
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MODULE_DEVICE_TABLE(of, max77857_of_id);
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static struct i2c_driver max77857_driver = {
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.driver = {
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.name = "max77857",
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.of_match_table = max77857_of_id,
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},
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.id_table = max77857_id,
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.probe = max77857_probe,
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};
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module_i2c_driver(max77857_driver);
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MODULE_DESCRIPTION("Analog Devices MAX77857 Buck-Boost Converter Driver");
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MODULE_AUTHOR("Ibrahim Tilki <Ibrahim.Tilki@analog.com>");
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MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>");
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MODULE_LICENSE("GPL");
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