From: "Ying-Chun Liu (PaulLiu)" paul.liu@linaro.org
This patch adds the support of MC34708 regulators.
Signed-off-by: Robin Gong B38343@freescale.com Signed-off-by: Ying-Chun Liu (PaulLiu) paul.liu@linaro.org Cc: Liam Girdwood lrg@ti.com Cc: Mark Brown broonie@opensource.wolfsonmicro.com Cc: Samuel Ortiz sameo@linux.intel.com Cc: Shawn Guo shawn.guo@linaro.org --- drivers/regulator/Kconfig | 7 + drivers/regulator/Makefile | 1 + drivers/regulator/mc34708-regulator.c | 729 +++++++++++++++++++++++++++++++++ drivers/regulator/mc34708.h | 79 ++++ 4 files changed, 816 insertions(+) create mode 100644 drivers/regulator/mc34708-regulator.c create mode 100644 drivers/regulator/mc34708.h
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 36db5a4..ca63e7f 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -129,6 +129,13 @@ config REGULATOR_MC13892 Say y here to support the regulators found on the Freescale MC13892 PMIC.
+config REGULATOR_MC34708 + tristate "Freescale MC34708 regulator driver" + depends on MFD_MC34708 + help + Say y here to support the regulators found on the Freescale MC34708 + PMIC. + config REGULATOR_ISL6271A tristate "Intersil ISL6271A Power regulator" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 94b5274..435fb6b 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o +obj-$(CONFIG_REGULATOR_MC34708) += mc34708-regulator.o obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o diff --git a/drivers/regulator/mc34708-regulator.c b/drivers/regulator/mc34708-regulator.c new file mode 100644 index 0000000..d306e6e --- /dev/null +++ b/drivers/regulator/mc34708-regulator.c @@ -0,0 +1,729 @@ +/* + * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/mfd/mc34708.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/driver.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/regulator/of_regulator.h> +#include <linux/of.h> +#include "mc34708.h" + +static const int mc34708_sw1A[] = { + 650000, 662500, 675000, 687500, 700000, 712500, + 725000, 737500, 750000, 762500, 775000, 787500, + 800000, 812500, 825000, 837500, 850000, 862500, + 875000, 887500, 900000, 912500, 925000, 937500, + 950000, 962500, 975000, 987500, 1000000, 1012500, + 1025000, 1037500, 1050000, 1062500, 1075000, 1087500, + 1100000, 1112500, 1125000, 1137500, 1150000, 1162500, + 1175000, 1187500, 1200000, 1212500, 1225000, 1237500, + 1250000, 1262500, 1275000, 1287500, 1300000, 1312500, + 1325000, 1337500, 1350000, 1362500, 1375000, 1387500, + 1400000, 1412500, 1425000, 1437500, +}; + + +static const int mc34708_sw2[] = { + 650000, 662500, 675000, 687500, 700000, 712500, + 725000, 737500, 750000, 762500, 775000, 787500, + 800000, 812500, 825000, 837500, 850000, 862500, + 875000, 887500, 900000, 912500, 925000, 937500, + 950000, 962500, 975000, 987500, 1000000, 1012500, + 1025000, 1037500, 1050000, 1062500, 1075000, 1087500, + 1100000, 1112500, 1125000, 1137500, 1150000, 1162500, + 1175000, 1187500, 1200000, 1212500, 1225000, 1237500, + 1250000, 1262500, 1275000, 1287500, 1300000, 1312500, + 1325000, 1337500, 1350000, 1362500, 1375000, 1387500, + 1400000, 1412500, 1425000, 1437500, +}; + +static const int mc34708_sw3[] = { + 650000, 675000, 700000, 725000, 750000, 775000, + 800000, 825000, 850000, 875000, 900000, 925000, + 950000, 975000, 1000000, 1025000, 1050000, 1075000, + 1100000, 1125000, 1150000, 1175000, 1200000, 1225000, + 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, + 1400000, 1425000, +}; + +static const int mc34708_sw4A[] = { + 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, + 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, + 1500000, 1525000, 1550000, 1575000, 1600000, 1625000, + 1650000, 1675000, 1700000, 1725000, 1750000, 1775000, + 1800000, 1825000, 1850000, 2500000, 3150000, +}; + + +static const int mc34708_sw5[] = { + 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, + 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, + 1500000, 1525000, 1550000, 1575000, 1600000, 1625000, + 1650000, 1675000, 1700000, 1725000, 1750000, 1775000, + 1800000, 1825000, 1850000, +}; + +static const int mc34708_swbst[] = { + 5000000, 5050000, 5100000, 5150000, +}; + +static const int mc34708_vpll[] = { + 1200000, 1250000, 1500000, 1800000, +}; + +static const int mc34708_vrefddr[] = { + 600000, +}; + +static const int mc34708_vusb[] = { + 3300000, +}; + +static const int mc34708_vusb2[] = { + 2500000, 2600000, 2750000, 3000000, +}; + +static const int mc34708_vdac[] = { + 2500000, 2600000, 2750000, 2775000, +}; + +static const int mc34708_vgen1[] = { + 1200000, 1250000, 1300000, 1350000, + 1400000, 1450000, 1500000, 1550000, +}; + +static const int mc34708_vgen2[] = { + 2500000, 2700000, 2800000, 2900000, + 3000000, 3100000, 3150000, 3300000, +}; + +static struct regulator_ops mc34708_regulator_ops; +static struct regulator_ops mc34708_fixed_regulator_ops; +/* sw regulators need special care due to the "hi bit" */ +static struct regulator_ops mc34708_sw_regulator_ops; +static struct regulator_ops mc34708_sw4_regulator_ops; + +#define MC34708_FIXED_VOL_DEFINE(name, reg, voltages) \ + MC34708_FIXED_DEFINE(MC34708_, name, reg, voltages, \ + mc34708_fixed_regulator_ops) + +#define MC34708_SW_DEFINE(name, reg, vsel_reg, voltages) \ + MC34708_DEFINE(MC34708_, name, reg, vsel_reg, voltages, \ + mc34708_sw_regulator_ops) + +#define MC34708_DEFINE_REGU(name, reg, vsel_reg, voltages) \ + MC34708_DEFINE(MC34708_, name, reg, vsel_reg, voltages, \ + mc34708_regulator_ops) + +#define MC34708_SW4_DEFINE(name, reg, vsel_reg, voltages) \ + MC34708_DEFINE(MC34708_, name, reg, vsel_reg, voltages, \ + mc34708_sw4_regulator_ops) + +#define MC34708_REVISION 7 + +#define MC34708_SW1ABVOL 24 +#define MC34708_SW1ABVOL_SW1AVSEL 0 +#define MC34708_SW1ABVOL_SW1AVSEL_M (0x3f<<0) +#define MC34708_SW1ABVOL_SW1AEN 0 +#define MC34708_SW1ABVOL_SW1BVSEL 0 +#define MC34708_SW1ABVOL_SW1BVSEL_M (0x3f<<0) +#define MC34708_SW1ABVOL_SW1BEN 0 + +#define MC34708_SW23VOL 25 +#define MC34708_SW23VOL_SW2VSEL 0 +#define MC34708_SW23VOL_SW2VSEL_M (0x3f<<0) +#define MC34708_SW23VOL_SW2EN 0 +#define MC34708_SW23VOL_SW3VSEL 12 +#define MC34708_SW23VOL_SW3VSEL_M (0x3f<<12) +#define MC34708_SW23VOL_SW3EN 0 + +#define MC34708_SW4ABVOL 26 +#define MC34708_SW4ABVOL_SW4AVSEL 0 +#define MC34708_SW4ABVOL_SW4AVSEL_M (0x1f<<0) +#define MC34708_SW4ABVOL_SW4AHI 10 +#define MC34708_SW4ABVOL_SW4AHI_M (0x3<<10) +#define MC34708_SW4ABVOL_SW4AEN 0 +#define MC34708_SW4ABVOL_SW4BVSEL 12 +#define MC34708_SW4ABVOL_SW4BVSEL_M (0x1f<<12) +#define MC34708_SW4ABVOL_SW4BHI 22 +#define MC34708_SW4ABVOL_SW4BHI_M (0x3<<22) +#define MC34708_SW4ABVOL_SW4BEN 0 + +#define MC34708_SW5VOL 27 +#define MC34708_SW5VOL_SW5VSEL 0 +#define MC34708_SW5VOL_SW5VSEL_M (0x1f<<0) +#define MC34708_SW5VOL_SW5EN 0 + +#define MC34708_SW12OP 28 +#define MC34708_SW12OP_SW1AMODE_M (0xf<<0) +#define MC34708_SW12OP_SW1AMODE_VALUE (0xc<<0) /*Normal:APS,Standby:PFM */ +#define MC34708_SW12OP_SW2MODE_M (0xf<<14) +#define MC34708_SW12OP_SW2MODE_VALUE (0xc<<14) /*Normal:APS,Standby:PFM */ + +#define MC34708_SW345OP 29 +#define MC34708_SW345OP_SW3MODE_M (0xf<<0) +#define MC34708_SW345OP_SW3MODE_VALUE (0x0<<0) /*Normal:OFF,Standby:OFF */ +#define MC34708_SW345OP_SW4AMODE_M (0xf<<6) +#define MC34708_SW345OP_SW4AMODE_VALUE (0xc<<6) /*Normal:APS,Standby:PFM */ +#define MC34708_SW345OP_SW4BMODE_M (0xf<<12) +#define MC34708_SW345OP_SW4BMODE_VALUE (0xc<<12) /*Normal:APS,Standby:PFM */ +#define MC34708_SW345OP_SW5MODE_M (0xf<<18) +#define MC34708_SW345OP_SW5MODE_VALUE (0xc<<18) /*Normal:APS,Standby:PFM */ + +#define MC34708_REGULATORSET0 30 +#define MC34708_REGULATORSET0_VGEN1VSEL 0 +#define MC34708_REGULATORSET0_VGEN1VSEL_M (0x7<<0) +#define MC34708_REGULATORSET0_VDACVSEL 4 +#define MC34708_REGULATORSET0_VDACVSEL_M (0x3<<4) +#define MC34708_REGULATORSET0_VGEN2VSEL 6 +#define MC34708_REGULATORSET0_VGEN2VSEL_M (0x7<<6) +#define MC34708_REGULATORSET0_VPLLVSEL 9 +#define MC34708_REGULATORSET0_VPLLVSEL_M (0x3<<9) +#define MC34708_REGULATORSET0_VUSB2VSEL 11 +#define MC34708_REGULATORSET0_VUSB2VSEL_M (0x3<<9) + +#define MC34708_SWBSTCONTROL 31 +#define MC34708_SWBSTCONTROL_SWBSTVSEL 0 +#define MC34708_SWBSTCONTROL_SWBSTVSEL_M (0x3<<0) +#define MC34708_SWBSTCONTROL_SWBSTMODE_M (0x3<<5) +#define MC34708_SWBSTCONTROL_SWBSTMODE_VALUE (0x2<<5) /*auto mode */ +#define MC34708_SWBSTCONTROL_SWBSTEN 0 + +#define MC34708_REGULATORMODE0 32 +#define MC34708_REGULATORMODE0_VGEN1EN 0 +#define MC34708_REGULATORMODE0_VUSBEN 3 +#define MC34708_REGULATORMODE0_VDACEN 4 +#define MC34708_REGULATORMODE0_VREFDDREN 10 +#define MC34708_REGULATORMODE0_VGEN2EN 12 +#define MC34708_REGULATORMODE0_VPLLEN 15 +#define MC34708_REGULATORMODE0_VUSB2EN 18 + +#define MC34708_USBCONTROL 39 +#define MC34708_USBCONTROL_SWHOLD_M (0x1<<12) +#define MC34708_USBCONTROL_SWHOLD_NORM (0x0<<12) + +static struct mc34708_regulator mc34708_regulators[] = { + MC34708_SW_DEFINE(SW1A, SW1ABVOL, SW1ABVOL, mc34708_sw1A), + MC34708_SW_DEFINE(SW1B, SW1ABVOL, SW1ABVOL, mc34708_sw1A), + MC34708_SW_DEFINE(SW2, SW23VOL, SW23VOL, mc34708_sw2), + MC34708_SW_DEFINE(SW3, SW23VOL, SW23VOL, mc34708_sw3), + MC34708_SW4_DEFINE(SW4A, SW4ABVOL, SW4ABVOL, mc34708_sw4A), + MC34708_SW4_DEFINE(SW4B, SW4ABVOL, SW4ABVOL, mc34708_sw4A), + MC34708_SW_DEFINE(SW5, SW5VOL, SW5VOL, mc34708_sw5), + MC34708_SW_DEFINE(SWBST, SWBSTCONTROL, SWBSTCONTROL, mc34708_swbst), + MC34708_DEFINE_REGU(VPLL, REGULATORMODE0, REGULATORSET0, mc34708_vpll), + MC34708_FIXED_VOL_DEFINE(VREFDDR, REGULATORMODE0, mc34708_vrefddr), + MC34708_FIXED_VOL_DEFINE(VUSB, REGULATORMODE0, mc34708_vusb), + MC34708_DEFINE_REGU(VUSB2, REGULATORMODE0, REGULATORSET0, + mc34708_vusb2), + MC34708_DEFINE_REGU(VDAC, REGULATORMODE0, REGULATORSET0, mc34708_vdac), + MC34708_DEFINE_REGU(VGEN1, REGULATORMODE0, REGULATORSET0, + mc34708_vgen1), + MC34708_DEFINE_REGU(VGEN2, REGULATORMODE0, REGULATORSET0, + mc34708_vgen2), +}; + +static int mc34708_regulator_enable(struct regulator_dev *rdev) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int id = rdev_get_id(rdev); + int ret; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); + + mc34708_lock(priv->mc34708); + ret = mc34708_reg_rmw(priv->mc34708, mc34708_regulators[id].reg, + mc34708_regulators[id].enable_bit, + mc34708_regulators[id].enable_bit); + mc34708_unlock(priv->mc34708); + + return ret; +} + +static int mc34708_regulator_disable(struct regulator_dev *rdev) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int id = rdev_get_id(rdev); + int ret; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); + + mc34708_lock(priv->mc34708); + ret = mc34708_reg_rmw(priv->mc34708, mc34708_regulators[id].reg, + mc34708_regulators[id].enable_bit, 0); + mc34708_unlock(priv->mc34708); + + return ret; +} + +static int mc34708_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int ret, id = rdev_get_id(rdev); + unsigned int val; + + mc34708_lock(priv->mc34708); + ret = mc34708_reg_read(priv->mc34708, mc34708_regulators[id].reg, &val); + mc34708_unlock(priv->mc34708); + + if (ret) + return ret; + + return (val & mc34708_regulators[id].enable_bit) != 0; +} + +int +mc34708_regulator_list_voltage(struct regulator_dev *rdev, unsigned selector) +{ + int id = rdev_get_id(rdev); + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + + if (selector >= mc34708_regulators[id].desc.n_voltages) + return -EINVAL; + + return mc34708_regulators[id].voltages[selector]; +} +EXPORT_SYMBOL_GPL(mc34708_regulator_list_voltage); + +int +mc34708_get_best_voltage_index(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int reg_id = rdev_get_id(rdev); + int i; + int bestmatch; + int bestindex; + + /* + * Locate the minimum voltage fitting the criteria on + * this regulator. The switchable voltages are not + * in strict falling order so we need to check them + * all for the best match. + */ + bestmatch = INT_MAX; + bestindex = -1; + for (i = 0; i < mc34708_regulators[reg_id].desc.n_voltages; i++) { + if (mc34708_regulators[reg_id].voltages[i] >= min_uV && + mc34708_regulators[reg_id].voltages[i] < bestmatch) { + bestmatch = mc34708_regulators[reg_id].voltages[i]; + bestindex = i; + } + } + + if (bestindex < 0 || bestmatch > max_uV) { + dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n", + min_uV, max_uV); + return -EINVAL; + } + return bestindex; +} +EXPORT_SYMBOL_GPL(mc34708_get_best_voltage_index); + +static int +mc34708_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, + int max_uV, unsigned *selector) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int value, id = rdev_get_id(rdev); + int ret; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n", + __func__, id, min_uV, max_uV); + + /* Find the best index */ + value = mc34708_get_best_voltage_index(rdev, min_uV, max_uV); + dev_dbg(rdev_get_dev(rdev), "%s best value: %d\n", __func__, value); + if (value < 0) + return value; + + mc34708_lock(priv->mc34708); + ret = mc34708_reg_rmw(priv->mc34708, mc34708_regulators[id].vsel_reg, + mc34708_regulators[id].vsel_mask, + value << mc34708_regulators[id].vsel_shift); + mc34708_unlock(priv->mc34708); + + return ret; +} + +static int mc34708_regulator_get_voltage(struct regulator_dev *rdev) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int ret, id = rdev_get_id(rdev); + unsigned int val; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); + + mc34708_lock(priv->mc34708); + ret = mc34708_reg_read(priv->mc34708, + mc34708_regulators[id].vsel_reg, &val); + mc34708_unlock(priv->mc34708); + + if (ret) + return ret; + + val = (val & mc34708_regulators[id].vsel_mask) + >> mc34708_regulators[id].vsel_shift; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val); + + BUG_ON(val > mc34708_regulators[id].desc.n_voltages); + + return mc34708_regulators[id].voltages[val]; +} + +static struct regulator_ops mc34708_regulator_ops = { + .enable = mc34708_regulator_enable, + .disable = mc34708_regulator_disable, + .is_enabled = mc34708_regulator_is_enabled, + .list_voltage = mc34708_regulator_list_voltage, + .set_voltage = mc34708_regulator_set_voltage, + .get_voltage = mc34708_regulator_get_voltage, +}; +EXPORT_SYMBOL_GPL(mc34708_regulator_ops); + +int +mc34708_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, + int max_uV, unsigned *selector) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int id = rdev_get_id(rdev); + + dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n", + __func__, id, min_uV, max_uV); + + if (min_uV >= mc34708_regulators[id].voltages[0] && + max_uV <= mc34708_regulators[id].voltages[0]) + return 0; + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(mc34708_fixed_regulator_set_voltage); + +int mc34708_fixed_regulator_get_voltage(struct regulator_dev *rdev) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int id = rdev_get_id(rdev); + + dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); + + return mc34708_regulators[id].voltages[0]; +} +EXPORT_SYMBOL_GPL(mc34708_fixed_regulator_get_voltage); + +static struct regulator_ops mc34708_fixed_regulator_ops = { + .enable = mc34708_regulator_enable, + .disable = mc34708_regulator_disable, + .is_enabled = mc34708_regulator_is_enabled, + .list_voltage = mc34708_regulator_list_voltage, + .set_voltage = mc34708_fixed_regulator_set_voltage, + .get_voltage = mc34708_fixed_regulator_get_voltage, +}; +EXPORT_SYMBOL_GPL(mc34708_fixed_regulator_ops); + +int mc34708_sw_regulator_is_enabled(struct regulator_dev *rdev) +{ + return 1; +} +EXPORT_SYMBOL_GPL(mc34708_sw_regulator_is_enabled); + +static int mc34708_sw4_regulator_get_voltage(struct regulator_dev *rdev) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int ret, id = rdev_get_id(rdev); + unsigned int val, hi; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); + + mc34708_lock(priv->mc34708); + ret = mc34708_reg_read(priv->mc34708, + mc34708_regulators[id].vsel_reg, &val); + mc34708_unlock(priv->mc34708); + + if (ret) + return ret; + hi = (val & MC34708_SW4ABVOL_SW4BHI_M) >> MC34708_SW4ABVOL_SW4BHI; + val = (val & mc34708_regulators[id].vsel_mask) + >> mc34708_regulators[id].vsel_shift; + dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val); + + if (hi == 0x1) /*2500000 */ + val = 27; + else if (hi == 0x2) /*3150000 */ + val = 28; + + return mc34708_regulators[id].voltages[val]; +} + +static int +mc34708_sw4_regulator_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV, unsigned *selector) +{ + struct mc34708_regulator_priv *priv = rdev_get_drvdata(rdev); + struct mc34708_regulator *mc34708_regulators = priv->mc34708_regulators; + int value, id = rdev_get_id(rdev); + int ret, hi; + + dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n", + __func__, id, min_uV, max_uV); + + /* Find the best index */ + value = mc34708_get_best_voltage_index(rdev, min_uV, max_uV); + dev_dbg(rdev_get_dev(rdev), "%s best value: %d\n", __func__, value); + if (value < 0) + return value; + if (value <= 26) + hi = 0x0; + else if (value == 27) + hi = 0x1; + else + hi = 0x2; + mc34708_lock(priv->mc34708); + ret = mc34708_reg_rmw(priv->mc34708, mc34708_regulators[id].vsel_reg, + mc34708_regulators[id].vsel_mask | + MC34708_SW4ABVOL_SW4BHI_M, + value << mc34708_regulators[id].vsel_shift | + (hi << MC34708_SW4ABVOL_SW4BHI)); + mc34708_unlock(priv->mc34708); + + return ret; +} + +static struct regulator_ops mc34708_sw4_regulator_ops = { + .is_enabled = mc34708_sw_regulator_is_enabled, + .list_voltage = mc34708_regulator_list_voltage, + .set_voltage = mc34708_sw4_regulator_set_voltage, + .get_voltage = mc34708_sw4_regulator_get_voltage, +}; + +static struct regulator_ops mc34708_sw_regulator_ops = { + .is_enabled = mc34708_sw_regulator_is_enabled, + .list_voltage = mc34708_regulator_list_voltage, + .set_voltage = mc34708_regulator_set_voltage, + .get_voltage = mc34708_regulator_get_voltage, +}; + +static struct mc34708_regulator_platform_data * +mc34708_get_pdata_from_dt(struct platform_device *pdev) +{ + struct mc34708_regulator_platform_data *pdata; + struct device_node *nproot = pdev->dev.parent->of_node; + struct device_node *np; + int i, j; + + if (!nproot) + return ERR_PTR(-ENODEV); + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, "cannot allocate memory for pdata\n"); + return ERR_PTR(-ENOMEM); + } + + nproot = of_find_node_by_name(nproot, "regulators"); + if (!nproot) + return pdata; + + for (np = of_get_next_child(nproot, NULL); np; + np = of_get_next_child(nproot, np)) { + pdata->num_regulators++; + } + pdata->regulators = devm_kzalloc(&pdev->dev, + sizeof(*pdata->regulators) * pdata->num_regulators, + GFP_KERNEL); + if (!pdata->regulators) { + dev_err(&pdev->dev, "cannot allocate memory for regulators\n"); + return ERR_PTR(-ENOMEM); + } + + j = 0; + for (np = of_get_next_child(nproot, NULL); np; + np = of_get_next_child(nproot, np)) { + for (i = 0; i < ARRAY_SIZE(mc34708_regulators); i++) { + if (!of_node_cmp(np->name, + mc34708_regulators[i].desc.name)) { + pdata->regulators[j].id = i; + pdata->regulators[j].init_data = + of_get_regulator_init_data(&pdev->dev, + np); + j++; + break; + } + } + if (i >= ARRAY_SIZE(mc34708_regulators)) + dev_warn(&pdev->dev, "can't find regulator %s\n", + np->name); + } + pdata->num_regulators = j; + + return pdata; +} + +static int __devinit mc34708_regulator_probe(struct platform_device *pdev) +{ + struct mc34708_regulator_priv *priv; + struct mc34708 *mc34708 = dev_get_drvdata(pdev->dev.parent); + struct mc34708_regulator_platform_data *pdata = + dev_get_platdata(&pdev->dev); + struct mc34708_regulator_init_data *init_data; + int i, ret; + u32 val = 0; + + if (!pdata) { + pdata = mc34708_get_pdata_from_dt(pdev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } + + priv = kzalloc(sizeof(*priv) + + pdata->num_regulators * sizeof(priv->regulators[0]), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->mc34708_regulators = mc34708_regulators; + priv->mc34708 = mc34708; + + mc34708_lock(mc34708); + ret = mc34708_reg_read(mc34708, MC34708_REVISION, &val); + if (ret) + goto err_free; + + ret = mc34708_reg_rmw(mc34708, MC34708_SW12OP, + MC34708_SW12OP_SW1AMODE_M | + MC34708_SW12OP_SW2MODE_M, + MC34708_SW12OP_SW1AMODE_VALUE | + MC34708_SW12OP_SW2MODE_VALUE); + if (ret) + goto err_free; + + ret = mc34708_reg_rmw(mc34708, MC34708_SW345OP, + MC34708_SW345OP_SW3MODE_M | + MC34708_SW345OP_SW4AMODE_M | + MC34708_SW345OP_SW4BMODE_M | + MC34708_SW345OP_SW5MODE_M, + MC34708_SW345OP_SW3MODE_VALUE | + MC34708_SW345OP_SW4AMODE_VALUE | + MC34708_SW345OP_SW4BMODE_VALUE | + MC34708_SW345OP_SW5MODE_VALUE); + if (ret) + goto err_free; + + ret = mc34708_reg_rmw(mc34708, MC34708_SWBSTCONTROL, + MC34708_SWBSTCONTROL_SWBSTMODE_M, + MC34708_SWBSTCONTROL_SWBSTMODE_VALUE); + if (ret) + goto err_free; + + ret = mc34708_reg_rmw(mc34708, MC34708_USBCONTROL, + MC34708_USBCONTROL_SWHOLD_M, + MC34708_USBCONTROL_SWHOLD_NORM); + if (ret) + goto err_free; + + mc34708_unlock(mc34708); + dev_dbg(&pdev->dev, "PMIC MC34708 ID:0x%x\n", val); + + for (i = 0; i < pdata->num_regulators; i++) { + init_data = &pdata->regulators[i]; + priv->regulators[i] = + regulator_register( + &mc34708_regulators[init_data->id].desc, + &pdev->dev, init_data->init_data, priv, + NULL); + + if (IS_ERR(priv->regulators[i])) { + dev_err(&pdev->dev, "fail to register regulator %s\n", + mc34708_regulators[i].desc.name); + ret = PTR_ERR(priv->regulators[i]); + goto err; + } + } + + platform_set_drvdata(pdev, priv); + + return 0; + err: + while (--i >= 0) + regulator_unregister(priv->regulators[i]); + + err_free: + mc34708_unlock(mc34708); + kfree(priv); + + return ret; +} + +static int __devexit mc34708_regulator_remove(struct platform_device *pdev) +{ + struct mc34708_regulator_priv *priv = platform_get_drvdata(pdev); + struct mc34708_regulator_platform_data *pdata = + dev_get_platdata(&pdev->dev); + int i; + + platform_set_drvdata(pdev, NULL); + + for (i = 0; i < pdata->num_regulators; i++) + regulator_unregister(priv->regulators[i]); + + kfree(priv); + return 0; +} + +static struct platform_driver mc34708_regulator_driver = { + .driver = { + .name = "mc34708-regulator", + .owner = THIS_MODULE, + }, + .remove = __devexit_p(mc34708_regulator_remove), + .probe = mc34708_regulator_probe, +}; + +static int __init mc34708_regulator_init(void) +{ + return platform_driver_register(&mc34708_regulator_driver); +} +subsys_initcall(mc34708_regulator_init); + +static void __exit mc34708_regulator_exit(void) +{ + platform_driver_unregister(&mc34708_regulator_driver); +} +module_exit(mc34708_regulator_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Robin Gong B38343@freescale.com, " + "Ying-Chun Liu (PaulLiu) paul.liu@linaro.org"); +MODULE_DESCRIPTION("Regulator Driver for Freescale MC34708 PMIC"); +MODULE_ALIAS("platform:mc34708-regulator"); diff --git a/drivers/regulator/mc34708.h b/drivers/regulator/mc34708.h new file mode 100644 index 0000000..f765086 --- /dev/null +++ b/drivers/regulator/mc34708.h @@ -0,0 +1,79 @@ +/* + * mc34708.h - regulators for the Freescale mc34708 PMIC + * Copyright (C) 2004-2011 Freescale Semiconductor, Inc. + * based on: + * Copyright (C) 2010 Yong Shen yong.shen@linaro.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __LINUX_REGULATOR_MC34708_H +#define __LINUX_REGULATOR_MC34708_H + +#include <linux/regulator/driver.h> + +struct mc34708_regulator { + struct regulator_desc desc; + int reg; + int enable_bit; + int vsel_reg; + int vsel_shift; + int vsel_mask; + int hi_bit; + int const *voltages; +}; + +struct mc34708_regulator_priv { + struct mc34708 *mc34708; + struct mc34708_regulator *mc34708_regulators; + struct regulator_dev *regulators[]; +}; + +int mc34708_sw_regulator(struct regulator_dev *rdev); +int mc34708_sw_regulator_is_enabled(struct regulator_dev *rdev); +int mc34708_get_best_voltage_index(struct regulator_dev *rdev, + int min_uV, int max_uV); +int mc34708_regulator_list_voltage(struct regulator_dev *rdev, + unsigned selector); +int mc34708_fixed_regulator_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV, + unsigned *selector); +int mc34708_fixed_regulator_get_voltage(struct regulator_dev *rdev); + +#define MC34708_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages, _ops) \ + [prefix ## _name] = { \ + .desc = { \ + .name = #prefix "_" #_name, \ + .n_voltages = ARRAY_SIZE(_voltages), \ + .ops = &_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = prefix ## _name, \ + .owner = THIS_MODULE, \ + }, \ + .reg = prefix ## _reg, \ + .enable_bit = prefix ## _reg ## _ ## _name ## EN, \ + .vsel_reg = prefix ## _vsel_reg, \ + .vsel_shift = prefix ## _vsel_reg ## _ ## _name ## VSEL,\ + .vsel_mask = prefix ## _vsel_reg ## _ ## _name ## VSEL_M,\ + .voltages = _voltages, \ + } + +#define MC34708_FIXED_DEFINE(prefix, _name, _reg, _voltages, _ops) \ + [prefix ## _name] = { \ + .desc = { \ + .name = #prefix "_" #_name, \ + .n_voltages = ARRAY_SIZE(_voltages), \ + .ops = &_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = prefix ## _name, \ + .owner = THIS_MODULE, \ + }, \ + .reg = prefix ## _reg, \ + .enable_bit = prefix ## _reg ## _ ## _name ## EN, \ + .voltages = _voltages, \ + } + +#endif