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authorMike Rapoport <mike@compulab.co.il>2010-07-27 14:03:01 +0300
committerLiam Girdwood <lrg@slimlogic.co.uk>2010-08-11 11:38:01 +0100
commit49610235d58ac44617b4878eb731f65ec4e87aa2 (patch)
tree542d3fe6893962a01d47fea0424dd6cea48d0e5f /drivers/regulator/tps6586x-regulator.c
parentc5a4655db9e0b5e49a0b17e1bf96462e93e3c326 (diff)
downloadvexpress-lsk-49610235d58ac44617b4878eb731f65ec4e87aa2.tar.gz
regulator: add TPS6586X regulator driver
Signed-off-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'drivers/regulator/tps6586x-regulator.c')
-rw-r--r--drivers/regulator/tps6586x-regulator.c387
1 files changed, 387 insertions, 0 deletions
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
new file mode 100644
index 00000000000..76cc41ecbdf
--- /dev/null
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -0,0 +1,387 @@
+/*
+ * Regulator driver for TI TPS6586x
+ *
+ * Copyright (C) 2010 Compulab Ltd.
+ * Author: Mike Rapoport <mike@compulab.co.il>
+ *
+ * Based on da903x
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Copyright (C) 2008 Compulab Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define DEBUG
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/tps6586x.h>
+
+/* supply control and voltage setting */
+#define TPS6586X_SUPPLYENA 0x10
+#define TPS6586X_SUPPLYENB 0x11
+#define TPS6586X_SUPPLYENC 0x12
+#define TPS6586X_SUPPLYEND 0x13
+#define TPS6586X_SUPPLYENE 0x14
+#define TPS6586X_VCC1 0x20
+#define TPS6586X_VCC2 0x21
+#define TPS6586X_SM1V1 0x23
+#define TPS6586X_SM1V2 0x24
+#define TPS6586X_SM1SL 0x25
+#define TPS6586X_SM0V1 0x26
+#define TPS6586X_SM0V2 0x27
+#define TPS6586X_SM0SL 0x28
+#define TPS6586X_LDO2AV1 0x29
+#define TPS6586X_LDO2AV2 0x2A
+#define TPS6586X_LDO2BV1 0x2F
+#define TPS6586X_LDO2BV2 0x30
+#define TPS6586X_LDO4V1 0x32
+#define TPS6586X_LDO4V2 0x33
+
+/* converter settings */
+#define TPS6586X_SUPPLYV1 0x41
+#define TPS6586X_SUPPLYV2 0x42
+#define TPS6586X_SUPPLYV3 0x43
+#define TPS6586X_SUPPLYV4 0x44
+#define TPS6586X_SUPPLYV5 0x45
+#define TPS6586X_SUPPLYV6 0x46
+#define TPS6586X_SMODE1 0x47
+#define TPS6586X_SMODE2 0x48
+
+struct tps6586x_regulator {
+ struct regulator_desc desc;
+
+ int volt_reg;
+ int volt_shift;
+ int volt_nbits;
+ int enable_bit[2];
+ int enable_reg[2];
+
+ int *voltages;
+
+ /* for DVM regulators */
+ int go_reg;
+ int go_bit;
+};
+
+static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
+{
+ return rdev_get_dev(rdev)->parent->parent;
+}
+
+static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ struct tps6586x_regulator *info = rdev_get_drvdata(rdev);
+
+ return info->voltages[selector];
+}
+
+
+static int __tps6586x_ldo_set_voltage(struct device *parent,
+ struct tps6586x_regulator *ri,
+ int min_uV, int max_uV)
+{
+ int val, uV;
+ uint8_t mask;
+
+ for (val = 0; val < ri->desc.n_voltages; val++) {
+ uV = ri->voltages[val] * 1000;
+
+ /* LDO0 has minimal voltage 1.2 rather than 1.25 */
+ if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0)
+ uV -= 50 * 1000;
+
+ /* use the first in-range value */
+ if (min_uV <= uV && uV <= max_uV) {
+
+ val <<= ri->volt_shift;
+ mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
+
+ return tps6586x_update(parent, ri->volt_reg, val, mask);
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
+ struct device *parent = to_tps6586x_dev(rdev);
+
+ return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV);
+}
+
+static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev)
+{
+ struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
+ struct device *parent = to_tps6586x_dev(rdev);
+ uint8_t val, mask;
+ int ret;
+
+ ret = tps6586x_read(parent, ri->volt_reg, &val);
+ if (ret)
+ return ret;
+
+ mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
+ val = (val & mask) >> ri->volt_shift;
+
+ if (val > ri->desc.n_voltages)
+ BUG();
+
+ return ri->voltages[val];
+}
+
+static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
+ struct device *parent = to_tps6586x_dev(rdev);
+ int ret;
+
+ ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV);
+ if (ret)
+ return ret;
+
+ return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit);
+}
+
+static int tps6586x_regulator_enable(struct regulator_dev *rdev)
+{
+ struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
+ struct device *parent = to_tps6586x_dev(rdev);
+
+ return tps6586x_set_bits(parent, ri->enable_reg[0],
+ 1 << ri->enable_bit[0]);
+}
+
+static int tps6586x_regulator_disable(struct regulator_dev *rdev)
+{
+ struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
+ struct device *parent = to_tps6586x_dev(rdev);
+
+ return tps6586x_clr_bits(parent, ri->enable_reg[0],
+ 1 << ri->enable_bit[0]);
+}
+
+static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
+{
+ struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
+ struct device *parent = to_tps6586x_dev(rdev);
+ uint8_t reg_val;
+ int ret;
+
+ ret = tps6586x_read(parent, ri->enable_reg[0], &reg_val);
+ if (ret)
+ return ret;
+
+ return !!(reg_val & (1 << ri->enable_bit[0]));
+}
+
+static struct regulator_ops tps6586x_regulator_ldo_ops = {
+ .list_voltage = tps6586x_ldo_list_voltage,
+ .get_voltage = tps6586x_ldo_get_voltage,
+ .set_voltage = tps6586x_ldo_set_voltage,
+
+ .is_enabled = tps6586x_regulator_is_enabled,
+ .enable = tps6586x_regulator_enable,
+ .disable = tps6586x_regulator_disable,
+};
+
+static struct regulator_ops tps6586x_regulator_dvm_ops = {
+ .list_voltage = tps6586x_ldo_list_voltage,
+ .get_voltage = tps6586x_ldo_get_voltage,
+ .set_voltage = tps6586x_dvm_set_voltage,
+
+ .is_enabled = tps6586x_regulator_is_enabled,
+ .enable = tps6586x_regulator_enable,
+ .disable = tps6586x_regulator_disable,
+};
+
+static int tps6586x_ldo_voltages[] = {
+ 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300,
+};
+
+static int tps6586x_ldo4_voltages[] = {
+ 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
+ 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075,
+ 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275,
+ 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475,
+};
+
+static int tps6586x_dvm_voltages[] = {
+ 725, 750, 775, 800, 825, 850, 875, 900,
+ 925, 950, 975, 1000, 1025, 1050, 1075, 1100,
+ 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
+ 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
+};
+
+#define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \
+ ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
+{ \
+ .desc = { \
+ .name = "REG-" #_id, \
+ .ops = &tps6586x_regulator_##_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = TPS6586X_ID_##_id, \
+ .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
+ .owner = THIS_MODULE, \
+ }, \
+ .volt_reg = TPS6586X_##vreg, \
+ .volt_shift = (shift), \
+ .volt_nbits = (nbits), \
+ .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
+ .enable_bit[0] = (ebit0), \
+ .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
+ .enable_bit[1] = (ebit1), \
+ .voltages = tps6586x_##vdata##_voltages, \
+}
+
+#define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \
+ ereg0, ebit0, ereg1, ebit1) \
+ TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits, \
+ ereg0, ebit0, ereg1, ebit1, 0, 0)
+
+#define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \
+ ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
+ TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits, \
+ ereg0, ebit0, ereg1, ebit1, goreg, gobit)
+
+static struct tps6586x_regulator tps6586x_regulator[] = {
+ TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0),
+ TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
+ TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
+ TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
+ TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
+ TPS6586X_LDO(LDO_8, ldo, SUPPLYV1, 5, 3, ENC, 6, END, 6),
+ TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
+ TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, ENE, 7, ENE, 7),
+ TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
+ TPS6586X_LDO(SM_2, dvm, SUPPLYV2, 0, 5, ENC, 1, END, 1),
+
+ TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6),
+ TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6),
+ TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2),
+ TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0),
+};
+
+/*
+ * TPS6586X has 2 enable bits that are OR'ed to determine the actual
+ * regulator state. Clearing one of this bits allows switching
+ * regulator on and of with single register write.
+ */
+static inline int tps6586x_regulator_preinit(struct device *parent,
+ struct tps6586x_regulator *ri)
+{
+ uint8_t val1, val2;
+ int ret;
+
+ ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
+ if (ret)
+ return ret;
+
+ ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
+ if (ret)
+ return ret;
+
+ if (!(val2 & ri->enable_bit[1]))
+ return 0;
+
+ /*
+ * The regulator is on, but it's enabled with the bit we don't
+ * want to use, so we switch the enable bits
+ */
+ if (!(val1 & ri->enable_bit[0])) {
+ ret = tps6586x_set_bits(parent, ri->enable_reg[0],
+ 1 << ri->enable_bit[0]);
+ if (ret)
+ return ret;
+ }
+
+ return tps6586x_clr_bits(parent, ri->enable_reg[1],
+ 1 << ri->enable_bit[1]);
+}
+
+static inline struct tps6586x_regulator *find_regulator_info(int id)
+{
+ struct tps6586x_regulator *ri;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
+ ri = &tps6586x_regulator[i];
+ if (ri->desc.id == id)
+ return ri;
+ }
+ return NULL;
+}
+
+static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
+{
+ struct tps6586x_regulator *ri = NULL;
+ struct regulator_dev *rdev;
+ int id = pdev->id;
+ int err;
+
+ dev_dbg(&pdev->dev, "Probing reulator %d\n", id);
+
+ ri = find_regulator_info(id);
+ if (ri == NULL) {
+ dev_err(&pdev->dev, "invalid regulator ID specified\n");
+ return -EINVAL;
+ }
+
+ err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
+ if (err)
+ return err;
+
+ rdev = regulator_register(&ri->desc, &pdev->dev,
+ pdev->dev.platform_data, ri);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register regulator %s\n",
+ ri->desc.name);
+ return PTR_ERR(rdev);
+ }
+
+ platform_set_drvdata(pdev, ri);
+
+ return 0;
+}
+
+static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver tps6586x_regulator_driver = {
+ .driver = {
+ .name = "tps6586x-regulator",
+ .owner = THIS_MODULE,
+ },
+ .probe = tps6586x_regulator_probe,
+ .remove = __devexit_p(tps6586x_regulator_remove),
+};
+
+static int __init tps6586x_regulator_init(void)
+{
+ return platform_driver_register(&tps6586x_regulator_driver);
+}
+subsys_initcall(tps6586x_regulator_init);
+
+static void __exit tps6586x_regulator_exit(void)
+{
+ platform_driver_unregister(&tps6586x_regulator_driver);
+}
+module_exit(tps6586x_regulator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
+MODULE_ALIAS("platform:tps6586x-regulator");