zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/regulator/max8997.c b/ap/os/linux/linux-3.4.x/drivers/regulator/max8997.c
new file mode 100644
index 0000000..8350f50
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/regulator/max8997.c
@@ -0,0 +1,1210 @@
+/*
+ * max8997.c - Regulator driver for the Maxim 8997/8966
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@smasung.com>
+ *
+ * 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
+ *
+ * This driver is based on max8998.c
+ */
+
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/max8997.h>
+#include <linux/mfd/max8997-private.h>
+
+struct max8997_data {
+ struct device *dev;
+ struct max8997_dev *iodev;
+ int num_regulators;
+ struct regulator_dev **rdev;
+ int ramp_delay; /* in mV/us */
+
+ bool buck1_gpiodvs;
+ bool buck2_gpiodvs;
+ bool buck5_gpiodvs;
+ u8 buck1_vol[8];
+ u8 buck2_vol[8];
+ u8 buck5_vol[8];
+ int buck125_gpios[3];
+ int buck125_gpioindex;
+ bool ignore_gpiodvs_side_effect;
+
+ u8 saved_states[MAX8997_REG_MAX];
+};
+
+static inline void max8997_set_gpio(struct max8997_data *max8997)
+{
+ int set3 = (max8997->buck125_gpioindex) & 0x1;
+ int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
+ int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
+
+ gpio_set_value(max8997->buck125_gpios[0], set1);
+ gpio_set_value(max8997->buck125_gpios[1], set2);
+ gpio_set_value(max8997->buck125_gpios[2], set3);
+}
+
+struct voltage_map_desc {
+ int min;
+ int max;
+ int step;
+ unsigned int n_bits;
+};
+
+/* Voltage maps in uV */
+static const struct voltage_map_desc ldo_voltage_map_desc = {
+ .min = 800000, .max = 3950000, .step = 50000, .n_bits = 6,
+}; /* LDO1 ~ 18, 21 all */
+
+static const struct voltage_map_desc buck1245_voltage_map_desc = {
+ .min = 650000, .max = 2225000, .step = 25000, .n_bits = 6,
+}; /* Buck1, 2, 4, 5 */
+
+static const struct voltage_map_desc buck37_voltage_map_desc = {
+ .min = 750000, .max = 3900000, .step = 50000, .n_bits = 6,
+}; /* Buck3, 7 */
+
+/* current map in uA */
+static const struct voltage_map_desc charger_current_map_desc = {
+ .min = 200000, .max = 950000, .step = 50000, .n_bits = 4,
+};
+
+static const struct voltage_map_desc topoff_current_map_desc = {
+ .min = 50000, .max = 200000, .step = 10000, .n_bits = 4,
+};
+
+static const struct voltage_map_desc *reg_voltage_map[] = {
+ [MAX8997_LDO1] = &ldo_voltage_map_desc,
+ [MAX8997_LDO2] = &ldo_voltage_map_desc,
+ [MAX8997_LDO3] = &ldo_voltage_map_desc,
+ [MAX8997_LDO4] = &ldo_voltage_map_desc,
+ [MAX8997_LDO5] = &ldo_voltage_map_desc,
+ [MAX8997_LDO6] = &ldo_voltage_map_desc,
+ [MAX8997_LDO7] = &ldo_voltage_map_desc,
+ [MAX8997_LDO8] = &ldo_voltage_map_desc,
+ [MAX8997_LDO9] = &ldo_voltage_map_desc,
+ [MAX8997_LDO10] = &ldo_voltage_map_desc,
+ [MAX8997_LDO11] = &ldo_voltage_map_desc,
+ [MAX8997_LDO12] = &ldo_voltage_map_desc,
+ [MAX8997_LDO13] = &ldo_voltage_map_desc,
+ [MAX8997_LDO14] = &ldo_voltage_map_desc,
+ [MAX8997_LDO15] = &ldo_voltage_map_desc,
+ [MAX8997_LDO16] = &ldo_voltage_map_desc,
+ [MAX8997_LDO17] = &ldo_voltage_map_desc,
+ [MAX8997_LDO18] = &ldo_voltage_map_desc,
+ [MAX8997_LDO21] = &ldo_voltage_map_desc,
+ [MAX8997_BUCK1] = &buck1245_voltage_map_desc,
+ [MAX8997_BUCK2] = &buck1245_voltage_map_desc,
+ [MAX8997_BUCK3] = &buck37_voltage_map_desc,
+ [MAX8997_BUCK4] = &buck1245_voltage_map_desc,
+ [MAX8997_BUCK5] = &buck1245_voltage_map_desc,
+ [MAX8997_BUCK6] = NULL,
+ [MAX8997_BUCK7] = &buck37_voltage_map_desc,
+ [MAX8997_EN32KHZ_AP] = NULL,
+ [MAX8997_EN32KHZ_CP] = NULL,
+ [MAX8997_ENVICHG] = NULL,
+ [MAX8997_ESAFEOUT1] = NULL,
+ [MAX8997_ESAFEOUT2] = NULL,
+ [MAX8997_CHARGER_CV] = NULL,
+ [MAX8997_CHARGER] = &charger_current_map_desc,
+ [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
+};
+
+static int max8997_list_voltage_safeout(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ int rid = rdev_get_id(rdev);
+
+ if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) {
+ switch (selector) {
+ case 0:
+ return 4850000;
+ case 1:
+ return 4900000;
+ case 2:
+ return 4950000;
+ case 3:
+ return 3300000;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ int rid = rdev_get_id(rdev);
+
+ if (rid != MAX8997_CHARGER_CV)
+ goto err;
+
+ switch (selector) {
+ case 0x00:
+ return 4200000;
+ case 0x01 ... 0x0E:
+ return 4000000 + 20000 * (selector - 0x01);
+ case 0x0F:
+ return 4350000;
+ default:
+ return -EINVAL;
+ }
+err:
+ return -EINVAL;
+}
+
+static int max8997_list_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ const struct voltage_map_desc *desc;
+ int rid = rdev_get_id(rdev);
+ int val;
+
+ if (rid >= ARRAY_SIZE(reg_voltage_map) ||
+ rid < 0)
+ return -EINVAL;
+
+ desc = reg_voltage_map[rid];
+ if (desc == NULL)
+ return -EINVAL;
+
+ val = desc->min + desc->step * selector;
+ if (val > desc->max)
+ return -EINVAL;
+
+ return val;
+}
+
+static int max8997_get_enable_register(struct regulator_dev *rdev,
+ int *reg, int *mask, int *pattern)
+{
+ int rid = rdev_get_id(rdev);
+
+ switch (rid) {
+ case MAX8997_LDO1 ... MAX8997_LDO21:
+ *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
+ *mask = 0xC0;
+ *pattern = 0xC0;
+ break;
+ case MAX8997_BUCK1:
+ *reg = MAX8997_REG_BUCK1CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_BUCK2:
+ *reg = MAX8997_REG_BUCK2CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_BUCK3:
+ *reg = MAX8997_REG_BUCK3CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_BUCK4:
+ *reg = MAX8997_REG_BUCK4CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_BUCK5:
+ *reg = MAX8997_REG_BUCK5CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_BUCK6:
+ *reg = MAX8997_REG_BUCK6CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_BUCK7:
+ *reg = MAX8997_REG_BUCK7CTRL;
+ *mask = 0x01;
+ *pattern = 0x01;
+ break;
+ case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
+ *reg = MAX8997_REG_MAINCON1;
+ *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
+ *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
+ break;
+ case MAX8997_ENVICHG:
+ *reg = MAX8997_REG_MBCCTRL1;
+ *mask = 0x80;
+ *pattern = 0x80;
+ break;
+ case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
+ *reg = MAX8997_REG_SAFEOUTCTRL;
+ *mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
+ *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
+ break;
+ case MAX8997_CHARGER:
+ *reg = MAX8997_REG_MBCCTRL2;
+ *mask = 0x40;
+ *pattern = 0x40;
+ break;
+ default:
+ /* Not controllable or not exists */
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max8997_reg_is_enabled(struct regulator_dev *rdev)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int ret, reg, mask, pattern;
+ u8 val;
+
+ ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
+ if (ret == -EINVAL)
+ return 1; /* "not controllable" */
+ else if (ret)
+ return ret;
+
+ ret = max8997_read_reg(i2c, reg, &val);
+ if (ret)
+ return ret;
+
+ return (val & mask) == pattern;
+}
+
+static int max8997_reg_enable(struct regulator_dev *rdev)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int ret, reg, mask, pattern;
+
+ ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
+ if (ret)
+ return ret;
+
+ return max8997_update_reg(i2c, reg, pattern, mask);
+}
+
+static int max8997_reg_disable(struct regulator_dev *rdev)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int ret, reg, mask, pattern;
+
+ ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
+ if (ret)
+ return ret;
+
+ return max8997_update_reg(i2c, reg, ~pattern, mask);
+}
+
+static int max8997_get_voltage_register(struct regulator_dev *rdev,
+ int *_reg, int *_shift, int *_mask)
+{
+ int rid = rdev_get_id(rdev);
+ int reg, shift = 0, mask = 0x3f;
+
+ switch (rid) {
+ case MAX8997_LDO1 ... MAX8997_LDO21:
+ reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
+ break;
+ case MAX8997_BUCK1:
+ reg = MAX8997_REG_BUCK1DVS1;
+ break;
+ case MAX8997_BUCK2:
+ reg = MAX8997_REG_BUCK2DVS1;
+ break;
+ case MAX8997_BUCK3:
+ reg = MAX8997_REG_BUCK3DVS;
+ break;
+ case MAX8997_BUCK4:
+ reg = MAX8997_REG_BUCK4DVS;
+ break;
+ case MAX8997_BUCK5:
+ reg = MAX8997_REG_BUCK5DVS1;
+ break;
+ case MAX8997_BUCK7:
+ reg = MAX8997_REG_BUCK7DVS;
+ break;
+ case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
+ reg = MAX8997_REG_SAFEOUTCTRL;
+ shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
+ mask = 0x3;
+ break;
+ case MAX8997_CHARGER_CV:
+ reg = MAX8997_REG_MBCCTRL3;
+ shift = 0;
+ mask = 0xf;
+ break;
+ case MAX8997_CHARGER:
+ reg = MAX8997_REG_MBCCTRL4;
+ shift = 0;
+ mask = 0xf;
+ break;
+ case MAX8997_CHARGER_TOPOFF:
+ reg = MAX8997_REG_MBCCTRL5;
+ shift = 0;
+ mask = 0xf;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *_reg = reg;
+ *_shift = shift;
+ *_mask = mask;
+
+ return 0;
+}
+
+static int max8997_get_voltage(struct regulator_dev *rdev)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int reg, shift, mask, ret;
+ int rid = rdev_get_id(rdev);
+ u8 val;
+
+ ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
+ if (ret)
+ return ret;
+
+ if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) ||
+ (rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) ||
+ (rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs))
+ reg += max8997->buck125_gpioindex;
+
+ ret = max8997_read_reg(i2c, reg, &val);
+ if (ret)
+ return ret;
+
+ val >>= shift;
+ val &= mask;
+
+ if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
+ return rdev->desc->ops->list_voltage(rdev, val);
+
+ /*
+ * max8997_list_voltage returns value for any rdev with voltage_map,
+ * which works for "CHARGER" and "CHARGER TOPOFF" that do not have
+ * list_voltage ops (they are current regulators).
+ */
+ return max8997_list_voltage(rdev, val);
+}
+
+static inline int max8997_get_voltage_proper_val(
+ const struct voltage_map_desc *desc,
+ int min_vol, int max_vol)
+{
+ int i = 0;
+
+ if (desc == NULL)
+ return -EINVAL;
+
+ if (max_vol < desc->min || min_vol > desc->max)
+ return -EINVAL;
+
+ while (desc->min + desc->step * i < min_vol &&
+ desc->min + desc->step * i < desc->max)
+ i++;
+
+ if (desc->min + desc->step * i > max_vol)
+ return -EINVAL;
+
+ if (i >= (1 << desc->n_bits))
+ return -EINVAL;
+
+ return i;
+}
+
+static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int rid = rdev_get_id(rdev);
+ int lb, ub;
+ int reg, shift = 0, mask, ret = 0;
+ u8 val = 0x0;
+
+ if (rid != MAX8997_CHARGER_CV)
+ return -EINVAL;
+
+ ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
+ if (ret)
+ return ret;
+
+ if (max_uV < 4000000 || min_uV > 4350000)
+ return -EINVAL;
+
+ if (min_uV <= 4000000) {
+ if (max_uV >= 4000000)
+ return -EINVAL;
+ else
+ val = 0x1;
+ } else if (min_uV <= 4200000 && max_uV >= 4200000)
+ val = 0x0;
+ else {
+ lb = (min_uV - 4000001) / 20000 + 2;
+ ub = (max_uV - 4000000) / 20000 + 1;
+
+ if (lb > ub)
+ return -EINVAL;
+
+ if (lb < 0xf)
+ val = lb;
+ else {
+ if (ub >= 0xf)
+ val = 0xf;
+ else
+ return -EINVAL;
+ }
+ }
+
+ *selector = val;
+
+ ret = max8997_update_reg(i2c, reg, val << shift, mask);
+
+ return ret;
+}
+
+/*
+ * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
+ * BUCK1, 2, and 5 are available if they are not controlled by gpio
+ */
+static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ const struct voltage_map_desc *desc;
+ int rid = rdev_get_id(rdev);
+ int reg, shift = 0, mask, ret;
+ int i;
+ u8 org;
+
+ switch (rid) {
+ case MAX8997_LDO1 ... MAX8997_LDO21:
+ break;
+ case MAX8997_BUCK1 ... MAX8997_BUCK5:
+ break;
+ case MAX8997_BUCK6:
+ return -EINVAL;
+ case MAX8997_BUCK7:
+ break;
+ case MAX8997_CHARGER:
+ break;
+ case MAX8997_CHARGER_TOPOFF:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ desc = reg_voltage_map[rid];
+
+ i = max8997_get_voltage_proper_val(desc, min_uV, max_uV);
+ if (i < 0)
+ return i;
+
+ ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
+ if (ret)
+ return ret;
+
+ max8997_read_reg(i2c, reg, &org);
+ org = (org & mask) >> shift;
+
+ ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
+ *selector = i;
+
+ if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
+ rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
+ /* If the voltage is increasing */
+ if (org < i)
+ udelay(DIV_ROUND_UP(desc->step * (i - org),
+ max8997->ramp_delay * 1000));
+ }
+
+ return ret;
+}
+
+/*
+ * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
+ *
+ * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
+ * of one of the bucks may affect that of another buck, which is the side
+ * effect of the change (set_voltage). This function examines the GPIO-DVS
+ * configurations and checks whether such side-effect exists.
+ */
+static int max8997_assess_side_effect(struct regulator_dev *rdev,
+ u8 new_val, int *best)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ int rid = rdev_get_id(rdev);
+ u8 *buckx_val[3];
+ bool buckx_gpiodvs[3];
+ int side_effect[8];
+ int min_side_effect = INT_MAX;
+ int i;
+
+ *best = -1;
+
+ switch (rid) {
+ case MAX8997_BUCK1:
+ rid = 0;
+ break;
+ case MAX8997_BUCK2:
+ rid = 1;
+ break;
+ case MAX8997_BUCK5:
+ rid = 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ buckx_val[0] = max8997->buck1_vol;
+ buckx_val[1] = max8997->buck2_vol;
+ buckx_val[2] = max8997->buck5_vol;
+ buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
+ buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
+ buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
+
+ for (i = 0; i < 8; i++) {
+ int others;
+
+ if (new_val != (buckx_val[rid])[i]) {
+ side_effect[i] = -1;
+ continue;
+ }
+
+ side_effect[i] = 0;
+ for (others = 0; others < 3; others++) {
+ int diff;
+
+ if (others == rid)
+ continue;
+ if (buckx_gpiodvs[others] == false)
+ continue; /* Not affected */
+ diff = (buckx_val[others])[i] -
+ (buckx_val[others])[max8997->buck125_gpioindex];
+ if (diff > 0)
+ side_effect[i] += diff;
+ else if (diff < 0)
+ side_effect[i] -= diff;
+ }
+ if (side_effect[i] == 0) {
+ *best = i;
+ return 0; /* NO SIDE EFFECT! Use This! */
+ }
+ if (side_effect[i] < min_side_effect) {
+ min_side_effect = side_effect[i];
+ *best = i;
+ }
+ }
+
+ if (*best == -1)
+ return -EINVAL;
+
+ return side_effect[*best];
+}
+
+/*
+ * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
+ * max8997_set_voltage_ldobuck to do the job.
+ */
+static int max8997_set_voltage_buck(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ int rid = rdev_get_id(rdev);
+ const struct voltage_map_desc *desc;
+ int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
+ bool gpio_dvs_mode = false;
+
+ if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
+ return -EINVAL;
+
+ switch (rid) {
+ case MAX8997_BUCK1:
+ if (max8997->buck1_gpiodvs)
+ gpio_dvs_mode = true;
+ break;
+ case MAX8997_BUCK2:
+ if (max8997->buck2_gpiodvs)
+ gpio_dvs_mode = true;
+ break;
+ case MAX8997_BUCK5:
+ if (max8997->buck5_gpiodvs)
+ gpio_dvs_mode = true;
+ break;
+ }
+
+ if (!gpio_dvs_mode)
+ return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
+ selector);
+
+ desc = reg_voltage_map[rid];
+ new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV);
+ if (new_val < 0)
+ return new_val;
+
+ tmp_dmg = INT_MAX;
+ tmp_idx = -1;
+ tmp_val = -1;
+ do {
+ damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
+ if (damage == 0)
+ goto out;
+
+ if (tmp_dmg > damage) {
+ tmp_idx = new_idx;
+ tmp_val = new_val;
+ tmp_dmg = damage;
+ }
+
+ new_val++;
+ } while (desc->min + desc->step * new_val <= desc->max);
+
+ new_idx = tmp_idx;
+ new_val = tmp_val;
+
+ if (max8997->ignore_gpiodvs_side_effect == false)
+ return -EINVAL;
+
+ dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
+ " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
+
+out:
+ if (new_idx < 0 || new_val < 0)
+ return -EINVAL;
+
+ max8997->buck125_gpioindex = new_idx;
+ max8997_set_gpio(max8997);
+ *selector = new_val;
+
+ return 0;
+}
+
+static const int safeoutvolt[] = {
+ 3300000,
+ 4850000,
+ 4900000,
+ 4950000,
+};
+
+/* For SAFEOUT1 and SAFEOUT2 */
+static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int rid = rdev_get_id(rdev);
+ int reg, shift = 0, mask, ret;
+ int i = 0;
+ u8 val;
+
+ if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
+ if (min_uV <= safeoutvolt[i] &&
+ max_uV >= safeoutvolt[i])
+ break;
+ }
+
+ if (i >= ARRAY_SIZE(safeoutvolt))
+ return -EINVAL;
+
+ if (i == 0)
+ val = 0x3;
+ else
+ val = i - 1;
+
+ ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
+ if (ret)
+ return ret;
+
+ ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
+ *selector = val;
+
+ return ret;
+}
+
+static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
+{
+ return 0;
+}
+
+static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = max8997->iodev->i2c;
+ int ret, reg, mask, pattern;
+ int rid = rdev_get_id(rdev);
+
+ ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
+ if (ret)
+ return ret;
+
+ max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
+
+ if (rid == MAX8997_LDO1 ||
+ rid == MAX8997_LDO10 ||
+ rid == MAX8997_LDO21) {
+ dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
+ rdev->desc->name);
+ return max8997_update_reg(i2c, reg, 0x40, mask);
+ }
+
+ dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
+ rdev->desc->name, max8997->saved_states[rid] & mask,
+ (~pattern) & mask);
+ return max8997_update_reg(i2c, reg, ~pattern, mask);
+}
+
+static struct regulator_ops max8997_ldo_ops = {
+ .list_voltage = max8997_list_voltage,
+ .is_enabled = max8997_reg_is_enabled,
+ .enable = max8997_reg_enable,
+ .disable = max8997_reg_disable,
+ .get_voltage = max8997_get_voltage,
+ .set_voltage = max8997_set_voltage_ldobuck,
+ .set_suspend_enable = max8997_reg_enable_suspend,
+ .set_suspend_disable = max8997_reg_disable_suspend,
+};
+
+static struct regulator_ops max8997_buck_ops = {
+ .list_voltage = max8997_list_voltage,
+ .is_enabled = max8997_reg_is_enabled,
+ .enable = max8997_reg_enable,
+ .disable = max8997_reg_disable,
+ .get_voltage = max8997_get_voltage,
+ .set_voltage = max8997_set_voltage_buck,
+ .set_suspend_enable = max8997_reg_enable_suspend,
+ .set_suspend_disable = max8997_reg_disable_suspend,
+};
+
+static struct regulator_ops max8997_fixedvolt_ops = {
+ .list_voltage = max8997_list_voltage,
+ .is_enabled = max8997_reg_is_enabled,
+ .enable = max8997_reg_enable,
+ .disable = max8997_reg_disable,
+ .set_suspend_enable = max8997_reg_enable_suspend,
+ .set_suspend_disable = max8997_reg_disable_suspend,
+};
+
+static struct regulator_ops max8997_safeout_ops = {
+ .list_voltage = max8997_list_voltage_safeout,
+ .is_enabled = max8997_reg_is_enabled,
+ .enable = max8997_reg_enable,
+ .disable = max8997_reg_disable,
+ .get_voltage = max8997_get_voltage,
+ .set_voltage = max8997_set_voltage_safeout,
+ .set_suspend_enable = max8997_reg_enable_suspend,
+ .set_suspend_disable = max8997_reg_disable_suspend,
+};
+
+static struct regulator_ops max8997_fixedstate_ops = {
+ .list_voltage = max8997_list_voltage_charger_cv,
+ .get_voltage = max8997_get_voltage,
+ .set_voltage = max8997_set_voltage_charger_cv,
+};
+
+static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ unsigned dummy;
+
+ return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
+}
+
+
+static struct regulator_ops max8997_charger_ops = {
+ .is_enabled = max8997_reg_is_enabled,
+ .enable = max8997_reg_enable,
+ .disable = max8997_reg_disable,
+ .get_current_limit = max8997_get_voltage,
+ .set_current_limit = max8997_set_voltage_ldobuck_wrap,
+};
+
+static struct regulator_ops max8997_charger_fixedstate_ops = {
+ .is_enabled = max8997_reg_is_enabled,
+ .get_current_limit = max8997_get_voltage,
+ .set_current_limit = max8997_set_voltage_ldobuck_wrap,
+};
+
+#define regulator_desc_ldo(num) { \
+ .name = "LDO"#num, \
+ .id = MAX8997_LDO##num, \
+ .ops = &max8997_ldo_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+}
+#define regulator_desc_buck(num) { \
+ .name = "BUCK"#num, \
+ .id = MAX8997_BUCK##num, \
+ .ops = &max8997_buck_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+}
+
+static struct regulator_desc regulators[] = {
+ regulator_desc_ldo(1),
+ regulator_desc_ldo(2),
+ regulator_desc_ldo(3),
+ regulator_desc_ldo(4),
+ regulator_desc_ldo(5),
+ regulator_desc_ldo(6),
+ regulator_desc_ldo(7),
+ regulator_desc_ldo(8),
+ regulator_desc_ldo(9),
+ regulator_desc_ldo(10),
+ regulator_desc_ldo(11),
+ regulator_desc_ldo(12),
+ regulator_desc_ldo(13),
+ regulator_desc_ldo(14),
+ regulator_desc_ldo(15),
+ regulator_desc_ldo(16),
+ regulator_desc_ldo(17),
+ regulator_desc_ldo(18),
+ regulator_desc_ldo(21),
+ regulator_desc_buck(1),
+ regulator_desc_buck(2),
+ regulator_desc_buck(3),
+ regulator_desc_buck(4),
+ regulator_desc_buck(5),
+ {
+ .name = "BUCK6",
+ .id = MAX8997_BUCK6,
+ .ops = &max8997_fixedvolt_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ },
+ regulator_desc_buck(7),
+ {
+ .name = "EN32KHz_AP",
+ .id = MAX8997_EN32KHZ_AP,
+ .ops = &max8997_fixedvolt_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "EN32KHz_CP",
+ .id = MAX8997_EN32KHZ_CP,
+ .ops = &max8997_fixedvolt_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "ENVICHG",
+ .id = MAX8997_ENVICHG,
+ .ops = &max8997_fixedvolt_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "ESAFEOUT1",
+ .id = MAX8997_ESAFEOUT1,
+ .ops = &max8997_safeout_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "ESAFEOUT2",
+ .id = MAX8997_ESAFEOUT2,
+ .ops = &max8997_safeout_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "CHARGER_CV",
+ .id = MAX8997_CHARGER_CV,
+ .ops = &max8997_fixedstate_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "CHARGER",
+ .id = MAX8997_CHARGER,
+ .ops = &max8997_charger_ops,
+ .type = REGULATOR_CURRENT,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "CHARGER_TOPOFF",
+ .id = MAX8997_CHARGER_TOPOFF,
+ .ops = &max8997_charger_fixedstate_ops,
+ .type = REGULATOR_CURRENT,
+ .owner = THIS_MODULE,
+ },
+};
+
+static __devinit int max8997_pmic_probe(struct platform_device *pdev)
+{
+ struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
+ struct regulator_dev **rdev;
+ struct max8997_data *max8997;
+ struct i2c_client *i2c;
+ int i, ret, size;
+ u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
+
+ if (!pdata) {
+ dev_err(pdev->dev.parent, "No platform init data supplied.\n");
+ return -ENODEV;
+ }
+
+ max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
+ if (!max8997)
+ return -ENOMEM;
+
+ size = sizeof(struct regulator_dev *) * pdata->num_regulators;
+ max8997->rdev = kzalloc(size, GFP_KERNEL);
+ if (!max8997->rdev) {
+ kfree(max8997);
+ return -ENOMEM;
+ }
+
+ rdev = max8997->rdev;
+ max8997->dev = &pdev->dev;
+ max8997->iodev = iodev;
+ max8997->num_regulators = pdata->num_regulators;
+ platform_set_drvdata(pdev, max8997);
+ i2c = max8997->iodev->i2c;
+
+ max8997->buck125_gpioindex = pdata->buck125_default_idx;
+ max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
+ max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
+ max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
+ memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
+ max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
+
+ for (i = 0; i < 8; i++) {
+ max8997->buck1_vol[i] = ret =
+ max8997_get_voltage_proper_val(
+ &buck1245_voltage_map_desc,
+ pdata->buck1_voltage[i],
+ pdata->buck1_voltage[i] +
+ buck1245_voltage_map_desc.step);
+ if (ret < 0)
+ goto err_alloc;
+
+ max8997->buck2_vol[i] = ret =
+ max8997_get_voltage_proper_val(
+ &buck1245_voltage_map_desc,
+ pdata->buck2_voltage[i],
+ pdata->buck2_voltage[i] +
+ buck1245_voltage_map_desc.step);
+ if (ret < 0)
+ goto err_alloc;
+
+ max8997->buck5_vol[i] = ret =
+ max8997_get_voltage_proper_val(
+ &buck1245_voltage_map_desc,
+ pdata->buck5_voltage[i],
+ pdata->buck5_voltage[i] +
+ buck1245_voltage_map_desc.step);
+ if (ret < 0)
+ goto err_alloc;
+
+ if (max_buck1 < max8997->buck1_vol[i])
+ max_buck1 = max8997->buck1_vol[i];
+ if (max_buck2 < max8997->buck2_vol[i])
+ max_buck2 = max8997->buck2_vol[i];
+ if (max_buck5 < max8997->buck5_vol[i])
+ max_buck5 = max8997->buck5_vol[i];
+ }
+
+ /* For the safety, set max voltage before setting up */
+ for (i = 0; i < 8; i++) {
+ max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
+ max_buck1, 0x3f);
+ max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
+ max_buck2, 0x3f);
+ max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
+ max_buck5, 0x3f);
+ }
+
+ /*
+ * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
+ * If at least one of them cares, set gpios.
+ */
+ if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
+ pdata->buck5_gpiodvs) {
+ bool gpio1set = false, gpio2set = false;
+
+ if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
+ !gpio_is_valid(pdata->buck125_gpios[1]) ||
+ !gpio_is_valid(pdata->buck125_gpios[2])) {
+ dev_err(&pdev->dev, "GPIO NOT VALID\n");
+ ret = -EINVAL;
+ goto err_alloc;
+ }
+
+ ret = gpio_request(pdata->buck125_gpios[0],
+ "MAX8997 SET1");
+ if (ret == -EBUSY)
+ dev_warn(&pdev->dev, "Duplicated gpio request"
+ " on SET1\n");
+ else if (ret)
+ goto err_alloc;
+ else
+ gpio1set = true;
+
+ ret = gpio_request(pdata->buck125_gpios[1],
+ "MAX8997 SET2");
+ if (ret == -EBUSY)
+ dev_warn(&pdev->dev, "Duplicated gpio request"
+ " on SET2\n");
+ else if (ret) {
+ if (gpio1set)
+ gpio_free(pdata->buck125_gpios[0]);
+ goto err_alloc;
+ } else
+ gpio2set = true;
+
+ ret = gpio_request(pdata->buck125_gpios[2],
+ "MAX8997 SET3");
+ if (ret == -EBUSY)
+ dev_warn(&pdev->dev, "Duplicated gpio request"
+ " on SET3\n");
+ else if (ret) {
+ if (gpio1set)
+ gpio_free(pdata->buck125_gpios[0]);
+ if (gpio2set)
+ gpio_free(pdata->buck125_gpios[1]);
+ goto err_alloc;
+ }
+
+ gpio_direction_output(pdata->buck125_gpios[0],
+ (max8997->buck125_gpioindex >> 2)
+ & 0x1); /* SET1 */
+ gpio_direction_output(pdata->buck125_gpios[1],
+ (max8997->buck125_gpioindex >> 1)
+ & 0x1); /* SET2 */
+ gpio_direction_output(pdata->buck125_gpios[2],
+ (max8997->buck125_gpioindex >> 0)
+ & 0x1); /* SET3 */
+ ret = 0;
+ }
+
+ /* DVS-GPIO disabled */
+ max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
+ (1 << 1) : (0 << 1), 1 << 1);
+ max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
+ (1 << 1) : (0 << 1), 1 << 1);
+ max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
+ (1 << 1) : (0 << 1), 1 << 1);
+
+ /* Initialize all the DVS related BUCK registers */
+ for (i = 0; i < 8; i++) {
+ max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
+ max8997->buck1_vol[i],
+ 0x3f);
+ max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
+ max8997->buck2_vol[i],
+ 0x3f);
+ max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
+ max8997->buck5_vol[i],
+ 0x3f);
+ }
+
+ /* Misc Settings */
+ max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
+ max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ const struct voltage_map_desc *desc;
+ int id = pdata->regulators[i].id;
+
+ desc = reg_voltage_map[id];
+ if (desc)
+ regulators[id].n_voltages =
+ (desc->max - desc->min) / desc->step + 1;
+ else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
+ regulators[id].n_voltages = 4;
+ else if (id == MAX8997_CHARGER_CV)
+ regulators[id].n_voltages = 16;
+
+ rdev[i] = regulator_register(®ulators[id], max8997->dev,
+ pdata->regulators[i].initdata, max8997, NULL);
+ if (IS_ERR(rdev[i])) {
+ ret = PTR_ERR(rdev[i]);
+ dev_err(max8997->dev, "regulator init failed for %d\n",
+ id);
+ rdev[i] = NULL;
+ goto err;
+ }
+ }
+
+ return 0;
+err:
+ for (i = 0; i < max8997->num_regulators; i++)
+ if (rdev[i])
+ regulator_unregister(rdev[i]);
+err_alloc:
+ kfree(max8997->rdev);
+ kfree(max8997);
+
+ return ret;
+}
+
+static int __devexit max8997_pmic_remove(struct platform_device *pdev)
+{
+ struct max8997_data *max8997 = platform_get_drvdata(pdev);
+ struct regulator_dev **rdev = max8997->rdev;
+ int i;
+
+ for (i = 0; i < max8997->num_regulators; i++)
+ if (rdev[i])
+ regulator_unregister(rdev[i]);
+
+ kfree(max8997->rdev);
+ kfree(max8997);
+
+ return 0;
+}
+
+static const struct platform_device_id max8997_pmic_id[] = {
+ { "max8997-pmic", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
+
+static struct platform_driver max8997_pmic_driver = {
+ .driver = {
+ .name = "max8997-pmic",
+ .owner = THIS_MODULE,
+ },
+ .probe = max8997_pmic_probe,
+ .remove = __devexit_p(max8997_pmic_remove),
+ .id_table = max8997_pmic_id,
+};
+
+static int __init max8997_pmic_init(void)
+{
+ return platform_driver_register(&max8997_pmic_driver);
+}
+subsys_initcall(max8997_pmic_init);
+
+static void __exit max8997_pmic_cleanup(void)
+{
+ platform_driver_unregister(&max8997_pmic_driver);
+}
+module_exit(max8997_pmic_cleanup);
+
+MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_LICENSE("GPL");