--- /dev/null
+/*
+ * Regulator driver for eta3555 DCDC chip for rk32xx
+ *
+ * Copyright (C) 2010, 2011 ROCKCHIP, Inc.
+
+ * Based on eta3555.c that is work by zhangqing<zhangqing@rock-chips.com>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/regulator/driver.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+
+#if 0
+#define DBG(x...) printk(KERN_INFO x)
+#else
+#define DBG(x...)
+#endif
+#if 0
+#define DBG_INFO(x...) printk(KERN_INFO x)
+#else
+#define DBG_INFO(x...)
+#endif
+#define PM_CONTROL
+
+#define ETA3555_SPEED 200*1000
+#define ETA3555_NUM_REGULATORS 1
+
+struct eta3555 {
+ struct device *dev;
+ struct mutex io_lock;
+ struct i2c_client *i2c;
+ int num_regulators;
+ struct regulator_dev **rdev;
+ int irq_base;
+ int chip_irq;
+ int sleep_gpio; /* */
+ unsigned int dcdc_slp_voltage[3]; /* buckx_voltage in uV */
+ bool pmic_sleep;
+ struct regmap *regmap;
+};
+
+struct eta3555_regulator {
+ struct device *dev;
+ struct regulator_desc *desc;
+ struct regulator_dev *rdev;
+};
+struct eta3555_board {
+ int irq;
+ int irq_base;
+ struct regulator_init_data *eta3555_init_data[ETA3555_NUM_REGULATORS];
+ struct device_node *of_node[ETA3555_NUM_REGULATORS];
+ int sleep_gpio; /* */
+ unsigned int dcdc_slp_voltage[3]; /* buckx_voltage in uV */
+ bool sleep;
+};
+
+struct eta3555_regulator_subdev {
+ int id;
+ struct regulator_init_data *initdata;
+ struct device_node *reg_node;
+};
+
+struct eta3555_platform_data {
+ int ono;
+ int num_regulators;
+ struct eta3555_regulator_subdev *regulators;
+
+ int sleep_gpio; /* */
+ unsigned int dcdc_slp_voltage[3]; /* buckx_voltage in uV */
+ bool sleep;
+};
+struct eta3555 *g_eta3555;
+
+static int eta3555_reg_read(struct eta3555 *eta3555, u8 reg);
+static int eta3555_set_bits(struct eta3555 *eta3555, u8 reg, u16 mask, u16 val);
+
+
+#define ETA3555_BUCK1_SET_VOL_BASE 0x00
+#define ETA3555_BUCK1_SLP_VOL_BASE 0x01
+#define ETA3555_CONTR_REG1 0x02
+//#define ETA3555_ID1_REG 0x03
+//#define ETA3555_ID2_REG 0x04
+#define ETA3555_CONTR_REG2 0x05
+
+#define BUCK_VOL_MASK 0x3f
+#define VOL_MIN_IDX 0x00
+#define VOL_MAX_IDX 0x3f
+
+const static int buck_voltage_map[] = {
+ 603000, 615750, 628500, 641250, 654000, 666750, 679500, 692250,
+ 705000, 717750, 730500, 743250, 756000, 768750, 781500, 794250,
+ 807000, 819750, 832500, 845250, 858000, 870750, 883500, 896250,
+ 909000, 921750, 934500, 947250, 960000, 972750, 985500, 998250,
+ 1011000, 1023750, 1036500, 1049250, 1062000, 1074750, 1087500, 1100250,
+ 1113000, 1125750, 1138500, 1151250, 1164000, 1176750, 1189500, 1202250,
+ 1215000, 1227750, 1240500, 1253250, 1266000, 1278750, 1291500, 1304250,
+ 1317000, 1329750, 1342500, 1355250, 1368000, 1380750, 1393500, 1406250,
+ /*
+ 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, 1437500,1450000, 1462500,1475000,1487500,1500000,
+*/
+};
+
+static int eta3555_dcdc_list_voltage(struct regulator_dev *dev, unsigned index)
+{
+ if (index >= ARRAY_SIZE(buck_voltage_map))
+ return -EINVAL;
+ return buck_voltage_map[index];
+}
+static int eta3555_dcdc_is_enabled(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 val;
+ u16 mask=0x80;
+ val = eta3555_reg_read(eta3555, ETA3555_BUCK1_SET_VOL_BASE);
+ if (val < 0)
+ return val;
+ val=val&~0x7f;
+ if (val & mask)
+ return 1;
+ else
+ return 0;
+}
+static int eta3555_dcdc_enable(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask=0x80;
+
+ return eta3555_set_bits(eta3555, ETA3555_BUCK1_SET_VOL_BASE, mask, 0x80);
+
+}
+static int eta3555_dcdc_disable(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask=0x80;
+ return eta3555_set_bits(eta3555, ETA3555_BUCK1_SET_VOL_BASE, mask, 0);
+}
+static int eta3555_dcdc_get_voltage(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 reg = 0;
+ int val;
+ reg = eta3555_reg_read(eta3555,ETA3555_BUCK1_SET_VOL_BASE);
+ reg &= BUCK_VOL_MASK;
+ val = buck_voltage_map[reg];
+ return val;
+}
+static int eta3555_dcdc_set_voltage(struct regulator_dev *dev,
+ int min_uV, int max_uV,unsigned *selector)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ const int *vol_map = buck_voltage_map;
+ u16 val;
+ int ret = 0;
+
+ if (min_uV < vol_map[VOL_MIN_IDX] ||
+ min_uV > vol_map[VOL_MAX_IDX])
+ return -EINVAL;
+
+ for (val = VOL_MIN_IDX; val <= VOL_MAX_IDX; val++){
+ if (vol_map[val] >= min_uV)
+ break;
+ }
+
+ if (vol_map[val] > max_uV)
+ printk("WARNING:this voltage is not support!voltage set is %d mv\n",vol_map[val]);
+
+ ret = eta3555_set_bits(eta3555, ETA3555_BUCK1_SET_VOL_BASE ,BUCK_VOL_MASK, val);
+ if(ret < 0)
+ printk("###################WARNING:set voltage is error!voltage set is %d mv %d\n",vol_map[val],ret);
+
+ return ret;
+}
+
+static unsigned int eta3555_dcdc_get_mode(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask = 0x40;
+ u16 val;
+ val = eta3555_reg_read(eta3555, ETA3555_BUCK1_SET_VOL_BASE);
+ if (val < 0) {
+ return val;
+ }
+ val=val & mask;
+ if (val== mask)
+ return REGULATOR_MODE_FAST;
+ else
+ return REGULATOR_MODE_NORMAL;
+
+}
+static int eta3555_dcdc_set_mode(struct regulator_dev *dev, unsigned int mode)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask = 0x40;
+
+ switch(mode)
+ {
+ case REGULATOR_MODE_FAST:
+ return eta3555_set_bits(eta3555,ETA3555_BUCK1_SET_VOL_BASE, mask, mask);
+ case REGULATOR_MODE_NORMAL:
+ return eta3555_set_bits(eta3555, ETA3555_BUCK1_SET_VOL_BASE, mask, 0);
+ default:
+ printk("error:dcdc_eta3555 only auto and pwm mode\n");
+ return -EINVAL;
+ }
+}
+static int eta3555_dcdc_set_voltage_time_sel(struct regulator_dev *dev, unsigned int old_selector,
+ unsigned int new_selector)
+{
+ int old_volt, new_volt;
+
+ old_volt = eta3555_dcdc_list_voltage(dev, old_selector);
+ if (old_volt < 0)
+ return old_volt;
+
+ new_volt = eta3555_dcdc_list_voltage(dev, new_selector);
+ if (new_volt < 0)
+ return new_volt;
+
+ return DIV_ROUND_UP(abs(old_volt - new_volt)*4, 10000);
+}
+static int eta3555_dcdc_suspend_enable(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask=0x80;
+
+ return eta3555_set_bits(eta3555, ETA3555_BUCK1_SLP_VOL_BASE, mask, 0x80);
+
+}
+static int eta3555_dcdc_suspend_disable(struct regulator_dev *dev)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask=0x80;
+ return eta3555_set_bits(eta3555, ETA3555_BUCK1_SLP_VOL_BASE, mask, 0);
+}
+static int eta3555_dcdc_set_sleep_voltage(struct regulator_dev *dev,
+ int uV)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ const int *vol_map = buck_voltage_map;
+ u16 val;
+ int ret = 0;
+
+ if (uV < vol_map[VOL_MIN_IDX] ||
+ uV > vol_map[VOL_MAX_IDX])
+ return -EINVAL;
+
+ for (val = VOL_MIN_IDX; val <= VOL_MAX_IDX; val++){
+ if (vol_map[val] >= uV)
+ break;
+ }
+
+ if (vol_map[val] > uV)
+ printk("WARNING:this voltage is not support!voltage set is %d mv\n",vol_map[val]);
+ ret = eta3555_set_bits(eta3555,ETA3555_BUCK1_SLP_VOL_BASE ,BUCK_VOL_MASK, val);
+ return ret;
+}
+
+
+static int eta3555_dcdc_set_suspend_mode(struct regulator_dev *dev, unsigned int mode)
+{
+ struct eta3555 *eta3555 = rdev_get_drvdata(dev);
+ u16 mask = 0x40;
+
+ switch(mode)
+ {
+ case REGULATOR_MODE_FAST:
+ return eta3555_set_bits(eta3555,ETA3555_BUCK1_SLP_VOL_BASE, mask, mask);
+ case REGULATOR_MODE_NORMAL:
+ return eta3555_set_bits(eta3555, ETA3555_BUCK1_SLP_VOL_BASE, mask, 0);
+ default:
+ printk("error:dcdc_eta3555 only auto and pwm mode\n");
+ return -EINVAL;
+ }
+}
+
+static struct regulator_ops eta3555_dcdc_ops = {
+ .set_voltage = eta3555_dcdc_set_voltage,
+ .get_voltage = eta3555_dcdc_get_voltage,
+ .list_voltage= eta3555_dcdc_list_voltage,
+ .is_enabled = eta3555_dcdc_is_enabled,
+ .enable = eta3555_dcdc_enable,
+ .disable = eta3555_dcdc_disable,
+ .get_mode = eta3555_dcdc_get_mode,
+ .set_mode = eta3555_dcdc_set_mode,
+ .set_suspend_voltage = eta3555_dcdc_set_sleep_voltage,
+ .set_suspend_enable = eta3555_dcdc_suspend_enable,
+ .set_suspend_disable = eta3555_dcdc_suspend_disable,
+ .set_suspend_mode = eta3555_dcdc_set_suspend_mode,
+ .set_voltage_time_sel = eta3555_dcdc_set_voltage_time_sel,
+};
+static struct regulator_desc regulators[] = {
+
+ {
+ .name = "ETA_DCDC1",
+ .id = 0,
+ .ops = &eta3555_dcdc_ops,
+ .n_voltages = ARRAY_SIZE(buck_voltage_map),
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int eta3555_i2c_read(struct i2c_client *i2c, char reg, int count, u16 *dest)
+{
+ int ret;
+ struct i2c_adapter *adap;
+ struct i2c_msg msgs[2];
+
+ if(!i2c)
+ return ret;
+
+ if (count != 1)
+ return -EIO;
+
+ adap = i2c->adapter;
+
+ msgs[0].addr = i2c->addr;
+ msgs[0].buf = ®
+ msgs[0].flags = i2c->flags;
+ msgs[0].len = 1;
+ msgs[0].scl_rate = ETA3555_SPEED;
+
+ msgs[1].buf = (u8 *)dest;
+ msgs[1].addr = i2c->addr;
+ msgs[1].flags = i2c->flags | I2C_M_RD;
+ msgs[1].len = 1;
+ msgs[1].scl_rate = ETA3555_SPEED;
+ ret = i2c_transfer(adap, msgs, 2);
+
+ DBG("***run in %s %d msgs[1].buf = %d\n",__FUNCTION__,__LINE__,*(msgs[1].buf));
+
+ return ret;
+}
+
+static int eta3555_i2c_write(struct i2c_client *i2c, char reg, int count, const u16 src)
+{
+ int ret=-1;
+
+ struct i2c_adapter *adap;
+ struct i2c_msg msg;
+ char tx_buf[2];
+
+ if(!i2c)
+ return ret;
+ if (count != 1)
+ return -EIO;
+
+ adap = i2c->adapter;
+ tx_buf[0] = reg;
+ tx_buf[1] = src;
+
+ msg.addr = i2c->addr;
+ msg.buf = &tx_buf[0];
+ msg.len = 1 +1;
+ msg.flags = i2c->flags;
+ msg.scl_rate = ETA3555_SPEED;
+
+ ret = i2c_transfer(adap, &msg, 1);
+ return ret;
+}
+
+static int eta3555_reg_read(struct eta3555 *eta3555, u8 reg)
+{
+ u16 val = 0;
+ int ret;
+
+ mutex_lock(&eta3555->io_lock);
+
+ ret = eta3555_i2c_read(eta3555->i2c, reg, 1, &val);
+
+ DBG("reg read 0x%02x -> 0x%02x\n", (int)reg, (unsigned)val&0xff);
+ if (ret < 0){
+ mutex_unlock(&eta3555->io_lock);
+ return ret;
+ }
+ mutex_unlock(&eta3555->io_lock);
+
+ return val & 0xff;
+}
+
+static int eta3555_set_bits(struct eta3555 *eta3555, u8 reg, u16 mask, u16 val)
+{
+ u16 tmp;
+ int ret;
+
+ mutex_lock(&eta3555->io_lock);
+
+ ret = eta3555_i2c_read(eta3555->i2c, reg, 1, &tmp);
+ DBG("1 reg read 0x%02x -> 0x%02x\n", (int)reg, (unsigned)tmp&0xff);
+ if (ret < 0){
+ mutex_unlock(&eta3555->io_lock);
+ return ret;
+ }
+ tmp = (tmp & ~mask) | val;
+ ret = eta3555_i2c_write(eta3555->i2c, reg, 1, tmp);
+ DBG("reg write 0x%02x -> 0x%02x\n", (int)reg, (unsigned)val&0xff);
+ if (ret < 0){
+ mutex_unlock(&eta3555->io_lock);
+ return ret;
+ }
+ ret = eta3555_i2c_read(eta3555->i2c, reg, 1, &tmp);
+ DBG("2 reg read 0x%02x -> 0x%02x\n", (int)reg, (unsigned)tmp&0xff);
+ if (ret < 0){
+ mutex_unlock(&eta3555->io_lock);
+ return ret;
+ }
+ mutex_unlock(&eta3555->io_lock);
+
+ return 0;//ret;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id eta3555_of_match[] = {
+ { .compatible = "eta3555"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, eta3555_of_match);
+#endif
+#ifdef CONFIG_OF
+static struct of_regulator_match eta3555_reg_matches[] = {
+ { .name = "eta_dcdc1" ,.driver_data = (void *)0},
+};
+
+static struct eta3555_board *eta3555_parse_dt(struct eta3555 *eta3555)
+{
+ struct eta3555_board *pdata;
+ struct device_node *regs;
+ struct device_node *eta3555_np;
+ int count;
+ DBG("%s,line=%d\n", __func__,__LINE__);
+ eta3555_np = of_node_get(eta3555->dev->of_node);
+ if (!eta3555_np) {
+ printk("could not find pmic sub-node\n");
+ return NULL;
+ }
+
+ regs = of_find_node_by_name(eta3555_np, "regulators");
+ if (!regs)
+ return NULL;
+ count = of_regulator_match(eta3555->dev, regs, eta3555_reg_matches,
+ ETA3555_NUM_REGULATORS);
+ of_node_put(regs);
+ pdata = devm_kzalloc(eta3555->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+ pdata->eta3555_init_data[0] = eta3555_reg_matches[0].init_data;
+ pdata->of_node[0] = eta3555_reg_matches[0].of_node;
+
+ return pdata;
+}
+
+#else
+static struct eta3555_board *eta3555_parse_dt(struct i2c_client *i2c)
+{
+ return NULL;
+}
+#endif
+
+static int eta3555_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
+{
+ struct eta3555 *eta3555;
+ struct eta3555_board *pdev ;
+ const struct of_device_id *match;
+ struct regulator_config config = { };
+ struct regulator_dev *eta_rdev;
+ struct regulator_init_data *reg_data;
+ const char *rail_name = NULL;
+ int ret;
+
+ DBG("%s,line=%d\n", __func__,__LINE__);
+
+ if (i2c->dev.of_node) {
+ match = of_match_device(eta3555_of_match, &i2c->dev);
+ if (!match) {
+ printk("Failed to find matching dt id\n");
+ return -EINVAL;
+ }
+ }
+
+ eta3555 = devm_kzalloc(&i2c->dev,sizeof(struct eta3555), GFP_KERNEL);
+ if (eta3555 == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ eta3555->i2c = i2c;
+ eta3555->dev = &i2c->dev;
+ i2c_set_clientdata(i2c, eta3555);
+ g_eta3555 = eta3555;
+
+ mutex_init(&eta3555->io_lock);
+
+ if (eta3555->dev->of_node)
+ pdev = eta3555_parse_dt(eta3555);
+
+ if (pdev) {
+ eta3555->num_regulators = ETA3555_NUM_REGULATORS;
+ eta3555->rdev = kcalloc(ETA3555_NUM_REGULATORS,sizeof(struct regulator_dev *), GFP_KERNEL);
+ if (!eta3555->rdev) {
+ return -ENOMEM;
+ }
+ /* Instantiate the regulators */
+ reg_data = pdev->eta3555_init_data[0];
+ config.dev = eta3555->dev;
+ config.driver_data = eta3555;
+
+ if (eta3555->dev->of_node)
+ config.of_node = pdev->of_node[0];
+ if (reg_data && reg_data->constraints.name)
+ {
+ rail_name = reg_data->constraints.name;
+ }
+ else
+ {
+ rail_name = regulators[0].name;
+ }
+ reg_data->supply_regulator = rail_name;
+
+ config.init_data =reg_data;
+ eta_rdev = regulator_register(®ulators[0],&config);
+ if (IS_ERR(eta_rdev)) {
+ printk("failed to register regulator\n");
+ goto err;
+ }
+ eta3555->rdev[0] = eta_rdev;
+ }
+ return 0;
+err:
+ return ret;
+
+}
+
+static int eta3555_i2c_remove(struct i2c_client *i2c)
+{
+ struct eta3555 *eta3555 = i2c_get_clientdata(i2c);
+
+ if (eta3555->rdev[0])
+ regulator_unregister(eta3555->rdev[0]);
+ i2c_set_clientdata(i2c, NULL);
+ return 0;
+}
+
+static const struct i2c_device_id eta3555_i2c_id[] = {
+ { "eta3555", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, eta3555_i2c_id);
+
+static struct i2c_driver eta3555_i2c_driver = {
+ .driver = {
+ .name = "eta3555",
+ .owner = THIS_MODULE,
+ .of_match_table =of_match_ptr(eta3555_of_match),
+ },
+ .probe = eta3555_i2c_probe,
+ .remove = eta3555_i2c_remove,
+ .id_table = eta3555_i2c_id,
+};
+
+static int __init eta3555_module_init(void)
+{
+ int ret;
+ ret = i2c_add_driver(&eta3555_i2c_driver);
+ if (ret != 0)
+ pr_err("Failed to register I2C driver: %d\n", ret);
+ return ret;
+}
+subsys_initcall_sync(eta3555_module_init);
+
+static void __exit eta3555_module_exit(void)
+{
+ i2c_del_driver(&eta3555_i2c_driver);
+}
+module_exit(eta3555_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("zhangqing <zhangqing@rock-chips.com>");
+MODULE_DESCRIPTION("eta3555 PMIC driver");
+
projects / firefly-linux-kernel-4.4.55.git / commitdiff