power: Add support for RK808 regulators
Add regulator support for the RK808 PMIC. It integrated 4 BUCKs and 8 LDOs all of which are supported by this driver. Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
parent
2a4febfd91
commit
e1227764cd
@ -49,6 +49,15 @@ config DM_REGULATOR_FIXED
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features for fixed value regulators. The driver implements get/set api
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for enable and get only for voltage value.
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config REGULATOR_RK808
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bool "Enable driver for RK808 regulators"
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depends on DM_REGULATOR && PMIC_RK808
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---help---
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Enable support for the regulator functions of the RK808 PMIC. The
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driver implements get/set api for the various BUCKS and LDOs supported
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by the PMIC device. This driver is controlled by a device tree node
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which includes voltage limits.
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config REGULATOR_S5M8767
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bool "Enable support for S5M8767 regulator"
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depends on DM_REGULATOR && PMIC_S5M8767
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@ -10,6 +10,7 @@ obj-$(CONFIG_REGULATOR_ACT8846) += act8846.o
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obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o
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obj-$(CONFIG_DM_REGULATOR_PFUZE100) += pfuze100.o
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obj-$(CONFIG_DM_REGULATOR_FIXED) += fixed.o
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obj-$(CONFIG_REGULATOR_RK808) += rk808.o
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obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
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obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o
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obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o
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301
drivers/power/regulator/rk808.c
Normal file
301
drivers/power/regulator/rk808.c
Normal file
@ -0,0 +1,301 @@
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/*
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* Copyright (C) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* Based on Rockchip's drivers/power/pmic/pmic_rk808.c:
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* Copyright (C) 2012 rockchips
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* zyw <zyw@rock-chips.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <power/rk808_pmic.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#ifndef CONFIG_SPL_BUILD
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#define ENABLE_DRIVER
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#endif
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struct rk808_reg_info {
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uint min_uv;
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uint step_uv;
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s8 vsel_reg;
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u8 vsel_bits;
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};
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static const struct rk808_reg_info rk808_buck[] = {
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{ 712500, 12500, REG_BUCK1_ON_VSEL, 6, },
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{ 712500, 12500, REG_BUCK2_ON_VSEL, 6, },
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{ 712500, 12500, -1, 6, },
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{ 1800000, 100000, REG_BUCK4_ON_VSEL, 4, },
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};
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static const struct rk808_reg_info rk808_ldo[] = {
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{ 1800000, 100000, LDO1_ON_VSEL, 5, },
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{ 1800000, 100000, LDO2_ON_VSEL, 5, },
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{ 800000, 100000, LDO3_ON_VSEL, 4, },
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{ 1800000, 100000, LDO4_ON_VSEL, 5, },
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{ 1800000, 100000, LDO5_ON_VSEL, 5, },
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{ 800000, 100000, LDO6_ON_VSEL, 5, },
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{ 800000, 100000, LDO7_ON_VSEL, 5, },
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{ 1800000, 100000, LDO8_ON_VSEL, 5, },
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};
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static int _buck_set_value(struct udevice *pmic, int buck, int uvolt)
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{
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const struct rk808_reg_info *info = &rk808_buck[buck - 1];
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int mask = (1 << info->vsel_bits) - 1;
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int val;
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if (info->vsel_reg == -1)
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return -ENOSYS;
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val = (uvolt - info->min_uv) / info->step_uv;
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debug("%s: reg=%x, mask=%x, val=%x\n", __func__, info->vsel_reg, mask,
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val);
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return pmic_clrsetbits(pmic, info->vsel_reg, mask, val);
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}
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static int _buck_set_enable(struct udevice *pmic, int buck, bool enable)
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{
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uint mask;
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int ret;
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buck--;
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mask = 1 << buck;
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if (enable) {
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ret = pmic_clrsetbits(pmic, DCDC_ILMAX, 0, 3 << (buck * 2));
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if (ret)
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return ret;
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ret = pmic_clrsetbits(pmic, REG_DCDC_UV_ACT, 1 << buck, 0);
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if (ret)
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return ret;
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}
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return pmic_clrsetbits(pmic, REG_DCDC_EN, mask, enable ? mask : 0);
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}
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#ifdef ENABLE_DRIVER
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static int buck_get_value(struct udevice *dev)
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{
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int buck = dev->driver_data - 1;
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const struct rk808_reg_info *info = &rk808_buck[buck];
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int mask = (1 << info->vsel_bits) - 1;
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int ret, val;
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if (info->vsel_reg == -1)
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return -ENOSYS;
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ret = pmic_reg_read(dev->parent, info->vsel_reg);
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if (ret < 0)
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return ret;
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val = ret & mask;
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return info->min_uv + val * info->step_uv;
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}
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static int buck_set_value(struct udevice *dev, int uvolt)
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{
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int buck = dev->driver_data;
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return _buck_set_value(dev->parent, buck, uvolt);
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}
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static int buck_set_enable(struct udevice *dev, bool enable)
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{
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int buck = dev->driver_data;
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return _buck_set_enable(dev->parent, buck, enable);
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}
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static bool buck_get_enable(struct udevice *dev)
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{
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int buck = dev->driver_data - 1;
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int ret;
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uint mask;
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mask = 1 << buck;
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ret = pmic_reg_read(dev->parent, REG_DCDC_EN);
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if (ret < 0)
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return ret;
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return ret & mask ? true : false;
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}
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static int ldo_get_value(struct udevice *dev)
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{
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int ldo = dev->driver_data - 1;
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const struct rk808_reg_info *info = &rk808_ldo[ldo];
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int mask = (1 << info->vsel_bits) - 1;
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int ret, val;
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if (info->vsel_reg == -1)
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return -ENOSYS;
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ret = pmic_reg_read(dev->parent, info->vsel_reg);
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if (ret < 0)
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return ret;
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val = ret & mask;
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return info->min_uv + val * info->step_uv;
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}
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static int ldo_set_value(struct udevice *dev, int uvolt)
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{
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int ldo = dev->driver_data - 1;
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const struct rk808_reg_info *info = &rk808_ldo[ldo];
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int mask = (1 << info->vsel_bits) - 1;
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int val;
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if (info->vsel_reg == -1)
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return -ENOSYS;
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val = (uvolt - info->min_uv) / info->step_uv;
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debug("%s: reg=%x, mask=%x, val=%x\n", __func__, info->vsel_reg, mask,
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val);
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return pmic_clrsetbits(dev->parent, info->vsel_reg, mask, val);
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}
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static int ldo_set_enable(struct udevice *dev, bool enable)
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{
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int ldo = dev->driver_data - 1;
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uint mask;
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mask = 1 << ldo;
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return pmic_clrsetbits(dev->parent, REG_LDO_EN, mask,
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enable ? mask : 0);
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}
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static bool ldo_get_enable(struct udevice *dev)
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{
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int ldo = dev->driver_data - 1;
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int ret;
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uint mask;
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mask = 1 << ldo;
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ret = pmic_reg_read(dev->parent, REG_LDO_EN);
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if (ret < 0)
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return ret;
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return ret & mask ? true : false;
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}
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static int switch_set_enable(struct udevice *dev, bool enable)
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{
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int sw = dev->driver_data - 1;
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uint mask;
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mask = 1 << (sw + 5);
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return pmic_clrsetbits(dev->parent, REG_DCDC_EN, mask,
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enable ? mask : 0);
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}
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static bool switch_get_enable(struct udevice *dev)
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{
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int sw = dev->driver_data - 1;
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int ret;
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uint mask;
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mask = 1 << (sw + 5);
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ret = pmic_reg_read(dev->parent, REG_DCDC_EN);
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if (ret < 0)
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return ret;
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return ret & mask ? true : false;
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}
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static int rk808_buck_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_BUCK;
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uc_pdata->mode_count = 0;
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return 0;
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}
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static int rk808_ldo_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_LDO;
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uc_pdata->mode_count = 0;
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return 0;
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}
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static int rk808_switch_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_FIXED;
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uc_pdata->mode_count = 0;
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return 0;
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}
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static const struct dm_regulator_ops rk808_buck_ops = {
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.get_value = buck_get_value,
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.set_value = buck_set_value,
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.get_enable = buck_get_enable,
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.set_enable = buck_set_enable,
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};
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static const struct dm_regulator_ops rk808_ldo_ops = {
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.get_value = ldo_get_value,
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.set_value = ldo_set_value,
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.get_enable = ldo_get_enable,
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.set_enable = ldo_set_enable,
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};
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static const struct dm_regulator_ops rk808_switch_ops = {
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.get_enable = switch_get_enable,
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.set_enable = switch_set_enable,
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};
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U_BOOT_DRIVER(rk808_buck) = {
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.name = "rk808_buck",
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.id = UCLASS_REGULATOR,
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.ops = &rk808_buck_ops,
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.probe = rk808_buck_probe,
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};
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U_BOOT_DRIVER(rk808_ldo) = {
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.name = "rk808_ldo",
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.id = UCLASS_REGULATOR,
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.ops = &rk808_ldo_ops,
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.probe = rk808_ldo_probe,
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};
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U_BOOT_DRIVER(rk808_switch) = {
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.name = "rk808_switch",
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.id = UCLASS_REGULATOR,
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.ops = &rk808_switch_ops,
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.probe = rk808_switch_probe,
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};
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#endif
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int rk808_spl_configure_buck(struct udevice *pmic, int buck, int uvolt)
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{
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int ret;
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ret = _buck_set_value(pmic, buck, uvolt);
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if (ret)
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return ret;
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return _buck_set_enable(pmic, buck, true);
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}
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