367 lines
10 KiB
C
367 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Broadcom BCM590xx regulator driver
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*
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* Copyright 2014 Linaro Limited
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* Author: Matt Porter <mporter@linaro.org>
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mfd/bcm590xx.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.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/slab.h>
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/* I2C slave 0 registers */
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#define BCM590XX_RFLDOPMCTRL1 0x60
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#define BCM590XX_IOSR1PMCTRL1 0x7a
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#define BCM590XX_IOSR2PMCTRL1 0x7c
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#define BCM590XX_CSRPMCTRL1 0x7e
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#define BCM590XX_SDSR1PMCTRL1 0x82
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#define BCM590XX_SDSR2PMCTRL1 0x86
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#define BCM590XX_MSRPMCTRL1 0x8a
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#define BCM590XX_VSRPMCTRL1 0x8e
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#define BCM590XX_RFLDOCTRL 0x96
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#define BCM590XX_CSRVOUT1 0xc0
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/* I2C slave 1 registers */
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#define BCM590XX_GPLDO5PMCTRL1 0x16
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#define BCM590XX_GPLDO6PMCTRL1 0x18
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#define BCM590XX_GPLDO1CTRL 0x1a
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#define BCM590XX_GPLDO2CTRL 0x1b
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#define BCM590XX_GPLDO3CTRL 0x1c
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#define BCM590XX_GPLDO4CTRL 0x1d
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#define BCM590XX_GPLDO5CTRL 0x1e
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#define BCM590XX_GPLDO6CTRL 0x1f
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#define BCM590XX_OTG_CTRL 0x40
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#define BCM590XX_GPLDO1PMCTRL1 0x57
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#define BCM590XX_GPLDO2PMCTRL1 0x59
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#define BCM590XX_GPLDO3PMCTRL1 0x5b
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#define BCM590XX_GPLDO4PMCTRL1 0x5d
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#define BCM590XX_REG_ENABLE BIT(7)
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#define BCM590XX_VBUS_ENABLE BIT(2)
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#define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3)
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#define BCM590XX_SR_VSEL_MASK GENMASK(5, 0)
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/*
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* RFLDO to VSR regulators are
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* accessed via I2C slave 0
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*/
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/* LDO regulator IDs */
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#define BCM590XX_REG_RFLDO 0
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#define BCM590XX_REG_CAMLDO1 1
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#define BCM590XX_REG_CAMLDO2 2
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#define BCM590XX_REG_SIMLDO1 3
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#define BCM590XX_REG_SIMLDO2 4
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#define BCM590XX_REG_SDLDO 5
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#define BCM590XX_REG_SDXLDO 6
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#define BCM590XX_REG_MMCLDO1 7
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#define BCM590XX_REG_MMCLDO2 8
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#define BCM590XX_REG_AUDLDO 9
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#define BCM590XX_REG_MICLDO 10
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#define BCM590XX_REG_USBLDO 11
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#define BCM590XX_REG_VIBLDO 12
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/* DCDC regulator IDs */
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#define BCM590XX_REG_CSR 13
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#define BCM590XX_REG_IOSR1 14
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#define BCM590XX_REG_IOSR2 15
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#define BCM590XX_REG_MSR 16
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#define BCM590XX_REG_SDSR1 17
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#define BCM590XX_REG_SDSR2 18
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#define BCM590XX_REG_VSR 19
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/*
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* GPLDO1 to VBUS regulators are
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* accessed via I2C slave 1
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*/
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#define BCM590XX_REG_GPLDO1 20
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#define BCM590XX_REG_GPLDO2 21
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#define BCM590XX_REG_GPLDO3 22
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#define BCM590XX_REG_GPLDO4 23
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#define BCM590XX_REG_GPLDO5 24
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#define BCM590XX_REG_GPLDO6 25
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#define BCM590XX_REG_VBUS 26
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#define BCM590XX_NUM_REGS 27
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#define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR)
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#define BCM590XX_REG_IS_GPLDO(n) \
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((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))
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#define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS)
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/* LDO group A: supported voltages in microvolts */
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static const unsigned int ldo_a_table[] = {
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1200000, 1800000, 2500000, 2700000, 2800000,
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2900000, 3000000, 3300000,
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};
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/* LDO group C: supported voltages in microvolts */
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static const unsigned int ldo_c_table[] = {
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3100000, 1800000, 2500000, 2700000, 2800000,
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2900000, 3000000, 3300000,
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};
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static const unsigned int ldo_vbus[] = {
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5000000,
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};
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/* DCDC group CSR: supported voltages in microvolts */
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static const struct linear_range dcdc_csr_ranges[] = {
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REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
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REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
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REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
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};
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/* DCDC group IOSR1: supported voltages in microvolts */
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static const struct linear_range dcdc_iosr1_ranges[] = {
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REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
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REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
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REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
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REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
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};
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/* DCDC group SDSR1: supported voltages in microvolts */
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static const struct linear_range dcdc_sdsr1_ranges[] = {
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REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
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REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
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REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
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};
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struct bcm590xx_info {
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const char *name;
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const char *vin_name;
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u8 n_voltages;
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const unsigned int *volt_table;
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u8 n_linear_ranges;
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const struct linear_range *linear_ranges;
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};
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#define BCM590XX_REG_TABLE(_name, _table) \
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{ \
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.name = #_name, \
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.n_voltages = ARRAY_SIZE(_table), \
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.volt_table = _table, \
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}
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#define BCM590XX_REG_RANGES(_name, _ranges) \
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{ \
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.name = #_name, \
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.n_voltages = 64, \
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.n_linear_ranges = ARRAY_SIZE(_ranges), \
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.linear_ranges = _ranges, \
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}
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static struct bcm590xx_info bcm590xx_regs[] = {
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BCM590XX_REG_TABLE(rfldo, ldo_a_table),
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BCM590XX_REG_TABLE(camldo1, ldo_c_table),
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BCM590XX_REG_TABLE(camldo2, ldo_c_table),
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BCM590XX_REG_TABLE(simldo1, ldo_a_table),
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BCM590XX_REG_TABLE(simldo2, ldo_a_table),
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BCM590XX_REG_TABLE(sdldo, ldo_c_table),
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BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
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BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
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BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
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BCM590XX_REG_TABLE(audldo, ldo_a_table),
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BCM590XX_REG_TABLE(micldo, ldo_a_table),
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BCM590XX_REG_TABLE(usbldo, ldo_a_table),
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BCM590XX_REG_TABLE(vibldo, ldo_c_table),
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BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
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BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
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BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
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BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
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BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
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BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
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BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
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BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
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BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
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BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
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BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
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BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
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BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
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BCM590XX_REG_TABLE(vbus, ldo_vbus),
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};
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struct bcm590xx_reg {
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struct regulator_desc *desc;
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struct bcm590xx *mfd;
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};
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static int bcm590xx_get_vsel_register(int id)
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{
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if (BCM590XX_REG_IS_LDO(id))
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return BCM590XX_RFLDOCTRL + id;
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else if (BCM590XX_REG_IS_GPLDO(id))
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return BCM590XX_GPLDO1CTRL + id;
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else
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return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
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}
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static int bcm590xx_get_enable_register(int id)
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{
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int reg = 0;
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if (BCM590XX_REG_IS_LDO(id))
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reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
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else if (BCM590XX_REG_IS_GPLDO(id))
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reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
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else
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switch (id) {
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case BCM590XX_REG_CSR:
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reg = BCM590XX_CSRPMCTRL1;
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break;
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case BCM590XX_REG_IOSR1:
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reg = BCM590XX_IOSR1PMCTRL1;
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break;
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case BCM590XX_REG_IOSR2:
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reg = BCM590XX_IOSR2PMCTRL1;
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break;
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case BCM590XX_REG_MSR:
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reg = BCM590XX_MSRPMCTRL1;
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break;
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case BCM590XX_REG_SDSR1:
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reg = BCM590XX_SDSR1PMCTRL1;
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break;
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case BCM590XX_REG_SDSR2:
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reg = BCM590XX_SDSR2PMCTRL1;
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break;
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case BCM590XX_REG_VSR:
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reg = BCM590XX_VSRPMCTRL1;
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break;
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case BCM590XX_REG_VBUS:
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reg = BCM590XX_OTG_CTRL;
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break;
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}
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return reg;
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}
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static const struct regulator_ops bcm590xx_ops_ldo = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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};
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static const struct regulator_ops bcm590xx_ops_dcdc = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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};
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static const struct regulator_ops bcm590xx_ops_vbus = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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};
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static int bcm590xx_probe(struct platform_device *pdev)
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{
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struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
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struct bcm590xx_reg *pmu;
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struct regulator_config config = { };
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struct bcm590xx_info *info;
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struct regulator_dev *rdev;
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int i;
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pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
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if (!pmu)
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return -ENOMEM;
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pmu->mfd = bcm590xx;
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platform_set_drvdata(pdev, pmu);
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pmu->desc = devm_kcalloc(&pdev->dev,
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BCM590XX_NUM_REGS,
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sizeof(struct regulator_desc),
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GFP_KERNEL);
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if (!pmu->desc)
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return -ENOMEM;
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info = bcm590xx_regs;
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for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
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/* Register the regulators */
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pmu->desc[i].name = info->name;
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pmu->desc[i].of_match = of_match_ptr(info->name);
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pmu->desc[i].regulators_node = of_match_ptr("regulators");
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pmu->desc[i].supply_name = info->vin_name;
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pmu->desc[i].id = i;
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pmu->desc[i].volt_table = info->volt_table;
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pmu->desc[i].n_voltages = info->n_voltages;
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pmu->desc[i].linear_ranges = info->linear_ranges;
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pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
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if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
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pmu->desc[i].ops = &bcm590xx_ops_ldo;
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pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
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} else if (BCM590XX_REG_IS_VBUS(i))
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pmu->desc[i].ops = &bcm590xx_ops_vbus;
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else {
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pmu->desc[i].ops = &bcm590xx_ops_dcdc;
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pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
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}
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if (BCM590XX_REG_IS_VBUS(i))
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pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
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else {
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pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
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pmu->desc[i].enable_is_inverted = true;
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pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
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}
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pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
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pmu->desc[i].type = REGULATOR_VOLTAGE;
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pmu->desc[i].owner = THIS_MODULE;
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config.dev = bcm590xx->dev;
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config.driver_data = pmu;
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if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
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config.regmap = bcm590xx->regmap_sec;
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else
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config.regmap = bcm590xx->regmap_pri;
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rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(bcm590xx->dev,
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"failed to register %s regulator\n",
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pdev->name);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static struct platform_driver bcm590xx_regulator_driver = {
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.driver = {
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.name = "bcm590xx-vregs",
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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},
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.probe = bcm590xx_probe,
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};
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module_platform_driver(bcm590xx_regulator_driver);
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MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
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MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:bcm590xx-vregs");
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