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https://github.com/AsahiLinux/u-boot
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power: regulator: tps65941: add regulator support
The driver provides regulator set/get voltage enable/disable functions for tps65941 family of PMICs. Signed-off-by: Keerthy <j-keerthy@ti.com>
This commit is contained in:
Keerthy
Tom Rini
parent
6b86dd0c1e
commit
065a452ae6
3 changed files with 418 additions and 0 deletions
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@ -323,3 +323,13 @@ config SPL_DM_REGULATOR_LP873X
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This enables implementation of driver-model regulator uclass
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features for REGULATOR LP873X and the family of LP873X PMICs.
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The driver implements get/set api for: value and enable in SPL.
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config DM_REGULATOR_TPS65941
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bool "Enable driver for TPS65941 PMIC regulators"
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depends on PMIC_TPS65941
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help
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This enables implementation of driver-model regulator uclass
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features for REGULATOR TPS65941 and the family of TPS65941 PMICs.
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TPS65941 series of PMICs have 5 single phase BUCKs that can also
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be configured in multi phase modes & 4 LDOs. The driver implements
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get/set api for value and enable.
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@ -28,3 +28,4 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o
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obj-$(CONFIG_DM_REGULATOR_TPS65910) += tps65910_regulator.o
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obj-$(CONFIG_DM_REGULATOR_TPS62360) += tps62360_regulator.o
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obj-$(CONFIG_$(SPL_)DM_REGULATOR_STPMIC1) += stpmic1.o
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obj-$(CONFIG_DM_REGULATOR_TPS65941) += tps65941_regulator.o
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407
drivers/power/regulator/tps65941_regulator.c
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407
drivers/power/regulator/tps65941_regulator.c
Normal file
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@ -0,0 +1,407 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2019
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* Texas Instruments Incorporated, <www.ti.com>
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*
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* Keerthy <j-keerthy@ti.com>
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/tps65941.h>
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static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
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0xC};
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static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
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0x14, 0x16};
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static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
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0x20};
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static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
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0x26};
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static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
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{
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int ret;
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unsigned int adr;
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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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adr = uc_pdata->ctrl_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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ret &= TPS65941_BUCK_MODE_MASK;
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if (ret)
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*enable = true;
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else
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*enable = false;
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return 0;
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} else if (op == PMIC_OP_SET) {
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if (*enable)
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ret |= TPS65941_BUCK_MODE_MASK;
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else
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ret &= ~TPS65941_BUCK_MODE_MASK;
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ret = pmic_reg_write(dev->parent, adr, ret);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int tps65941_buck_volt2val(int uV)
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{
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if (uV > TPS65941_BUCK_VOLT_MAX)
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return -EINVAL;
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else if (uV > 1650000)
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return (uV - 1660000) / 20000 + 0xAB;
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else if (uV > 1110000)
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return (uV - 1110000) / 10000 + 0x73;
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else if (uV > 600000)
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return (uV - 600000) / 5000 + 0x0F;
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else if (uV >= 300000)
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return (uV - 300000) / 20000 + 0x00;
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else
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return -EINVAL;
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}
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static int tps65941_buck_val2volt(int val)
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{
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if (val > TPS65941_BUCK_VOLT_MAX_HEX)
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return -EINVAL;
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else if (val > 0xAB)
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return 1660000 + (val - 0xAB) * 20000;
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else if (val > 0x73)
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return 1100000 + (val - 0x73) * 10000;
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else if (val > 0xF)
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return 600000 + (val - 0xF) * 5000;
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else if (val >= 0x0)
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return 300000 + val * 5000;
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else
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return -EINVAL;
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}
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int tps65941_lookup_slew(int id)
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{
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switch (id) {
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case 0:
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return 33000;
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case 1:
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return 20000;
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case 2:
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return 10000;
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case 3:
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return 5000;
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case 4:
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return 2500;
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case 5:
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return 1300;
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case 6:
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return 630;
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case 7:
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return 310;
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default:
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return -1;
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}
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}
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static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
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{
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unsigned int hex, adr;
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int ret, delta, uwait, slew;
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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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if (op == PMIC_OP_GET)
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*uV = 0;
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adr = uc_pdata->volt_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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ret &= TPS65941_BUCK_VOLT_MASK;
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ret = tps65941_buck_val2volt(ret);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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*uV = ret;
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return 0;
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}
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/*
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* Compute the delta voltage, find the slew rate and wait
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* for the appropriate amount of time after voltage switch
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*/
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if (*uV > ret)
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delta = *uV - ret;
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else
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delta = ret - *uV;
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slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
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if (slew < 0)
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return ret;
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slew &= TP65941_BUCK_CONF_SLEW_MASK;
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slew = tps65941_lookup_slew(slew);
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if (slew <= 0)
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return ret;
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uwait = delta / slew;
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hex = tps65941_buck_volt2val(*uV);
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if (hex < 0)
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return hex;
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ret &= 0x0;
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ret = hex;
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ret = pmic_reg_write(dev->parent, adr, ret);
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udelay(uwait);
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return ret;
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}
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static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
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{
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int ret;
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unsigned int adr;
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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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adr = uc_pdata->ctrl_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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ret &= TPS65941_LDO_MODE_MASK;
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if (ret)
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*enable = true;
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else
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*enable = false;
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return 0;
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} else if (op == PMIC_OP_SET) {
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if (*enable)
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ret |= TPS65941_LDO_MODE_MASK;
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else
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ret &= ~TPS65941_LDO_MODE_MASK;
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ret = pmic_reg_write(dev->parent, adr, ret);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int tps65941_ldo_val2volt(int val)
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{
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if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
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return -EINVAL;
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else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
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return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
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else
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return -EINVAL;
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}
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static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
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{
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unsigned int hex, adr;
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int ret;
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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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if (op == PMIC_OP_GET)
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*uV = 0;
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adr = uc_pdata->volt_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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ret &= TPS65941_LDO_VOLT_MASK;
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ret = tps65941_ldo_val2volt(ret);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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*uV = ret;
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return 0;
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}
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hex = tps65941_buck_volt2val(*uV);
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if (hex < 0)
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return hex;
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ret &= 0x0;
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ret = hex;
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ret = pmic_reg_write(dev->parent, adr, ret);
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return ret;
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}
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static int tps65941_ldo_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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int idx;
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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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idx = dev->driver_data;
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if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
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debug("Single phase regulator\n");
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} else {
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printf("Wrong ID for regulator\n");
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return -EINVAL;
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}
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uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
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uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
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return 0;
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}
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static int tps65941_buck_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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int idx;
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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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idx = dev->driver_data;
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if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
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debug("Single phase regulator\n");
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} else if (idx == 12) {
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idx = 1;
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} else if (idx == 34) {
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idx = 3;
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} else if (idx == 1234) {
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idx = 1;
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} else {
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printf("Wrong ID for regulator\n");
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return -EINVAL;
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}
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uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
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uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
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return 0;
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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 uV;
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int ret;
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ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
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if (ret)
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return ret;
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return uV;
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}
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static int ldo_set_value(struct udevice *dev, int uV)
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{
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return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
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}
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static int ldo_get_enable(struct udevice *dev)
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{
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bool enable = false;
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int ret;
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ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
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if (ret)
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return ret;
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return enable;
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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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return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
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}
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static int buck_get_value(struct udevice *dev)
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{
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int uV;
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int ret;
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ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
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if (ret)
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return ret;
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return uV;
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}
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static int buck_set_value(struct udevice *dev, int uV)
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{
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return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
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}
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static int buck_get_enable(struct udevice *dev)
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{
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bool enable = false;
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int ret;
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ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
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if (ret)
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return ret;
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return enable;
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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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return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
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}
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static const struct dm_regulator_ops tps65941_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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U_BOOT_DRIVER(tps65941_ldo) = {
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.name = TPS65941_LDO_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &tps65941_ldo_ops,
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.probe = tps65941_ldo_probe,
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};
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static const struct dm_regulator_ops tps65941_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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U_BOOT_DRIVER(tps65941_buck) = {
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.name = TPS65941_BUCK_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &tps65941_buck_ops,
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.probe = tps65941_buck_probe,
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};
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