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Subject[PATCH 23/44] staging: regulator: add a regulator driver for HiSilicon 6421v600 SPMI PMIC
Date
From: Mayulong <mayulong1@huawei.com>

Add the regulator driver for the LDO lines provided by the
HiSilicon 6421v600 SPMI PMIC device.

[mchehab+huawei@kernel.org: keep just the regulator driver on this patch,
renaming it to better fit at upstream namespace]

The compete patch is at:
https://github.com/96boards-hikey/linux/commit/08464419fba2

Signed-off-by: Mayulong <mayulong1@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
.../staging/hikey9xx/hi6421v600-regulator.c | 741 ++++++++++++++++++
1 file changed, 741 insertions(+)
create mode 100644 drivers/staging/hikey9xx/hi6421v600-regulator.c

diff --git a/drivers/staging/hikey9xx/hi6421v600-regulator.c b/drivers/staging/hikey9xx/hi6421v600-regulator.c
new file mode 100644
index 000000000000..941bfe32bf5b
--- /dev/null
+++ b/drivers/staging/hikey9xx/hi6421v600-regulator.c
@@ -0,0 +1,741 @@
+/*
+ * Device driver for regulators in Hisi IC
+ *
+ * Copyright (c) 2013 Linaro Ltd.
+ * Copyright (c) 2011 Hisilicon.
+ *
+ * Guodong Xu <guodong.xu@linaro.org>
+ *
+ * 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.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/hisi_pmic.h>
+#include <linux/delay.h>
+#include <linux/time.h>
+#include <linux/version.h>
+#ifdef CONFIG_HISI_PMIC_DEBUG
+#include <linux/debugfs.h>
+#endif
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+#include <linux/spmi.h>
+
+#if 1
+#define BRAND_DEBUG(args...) pr_debug(args);
+#else
+#define BRAND_DEBUG(args...)
+#endif
+
+struct hisi_regulator_register_info {
+ u32 ctrl_reg;
+ u32 enable_mask;
+ u32 eco_mode_mask;
+ u32 vset_reg;
+ u32 vset_mask;
+};
+
+struct hisi_regulator {
+ const char *name;
+ struct hisi_regulator_register_info register_info;
+ struct timeval last_off_time;
+ u32 off_on_delay;
+ u32 eco_uA;
+ struct regulator_desc rdesc;
+ int (*dt_parse)(struct hisi_regulator *, struct spmi_device *);
+};
+
+static DEFINE_MUTEX(enable_mutex);
+struct timeval last_enabled;
+
+
+static inline struct hisi_pmic *rdev_to_pmic(struct regulator_dev *dev)
+{
+ /* regulator_dev parent to->
+ * hisi regulator platform device_dev parent to->
+ * hisi pmic platform device_dev
+ */
+ return dev_get_drvdata(rdev_get_dev(dev)->parent->parent);
+}
+
+/* helper function to ensure when it returns it is at least 'delay_us'
+ * microseconds after 'since'.
+ */
+static void ensured_time_after(struct timeval since, u32 delay_us)
+{
+ struct timeval now;
+ u64 elapsed_ns64, delay_ns64;
+ u32 actual_us32;
+
+ delay_ns64 = delay_us * NSEC_PER_USEC;
+ do_gettimeofday(&now);
+ elapsed_ns64 = timeval_to_ns(&now) - timeval_to_ns(&since);
+ if (delay_ns64 > elapsed_ns64) {
+ actual_us32 = ((u32)(delay_ns64 - elapsed_ns64) /
+ NSEC_PER_USEC);
+ if (actual_us32 >= 1000) {
+ mdelay(actual_us32 / 1000); /*lint !e647 */
+ udelay(actual_us32 % 1000);
+ } else if (actual_us32 > 0) {
+ udelay(actual_us32);
+ }
+ }
+ return;
+}
+
+static int hisi_regulator_is_enabled(struct regulator_dev *dev)
+{
+ u32 reg_val;
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+
+ reg_val = hisi_pmic_read(pmic, sreg->register_info.ctrl_reg);
+ BRAND_DEBUG("<[%s]: ctrl_reg=0x%x,enable_state=%d>\n", __func__, sreg->register_info.ctrl_reg,\
+ (reg_val & sreg->register_info.enable_mask));
+
+ return ((reg_val & sreg->register_info.enable_mask) != 0);
+}
+
+static int hisi_regulator_enable(struct regulator_dev *dev)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+
+ /* keep a distance of off_on_delay from last time disabled */
+ ensured_time_after(sreg->last_off_time, sreg->off_on_delay);
+
+ BRAND_DEBUG("<[%s]: off_on_delay=%dus>\n", __func__, sreg->off_on_delay);
+
+ /* cannot enable more than one regulator at one time */
+ mutex_lock(&enable_mutex);
+ ensured_time_after(last_enabled, HISI_REGS_ENA_PROTECT_TIME);
+
+ /* set enable register */
+ hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
+ sreg->register_info.enable_mask,
+ sreg->register_info.enable_mask);
+ BRAND_DEBUG("<[%s]: ctrl_reg=0x%x,enable_mask=0x%x>\n", __func__, sreg->register_info.ctrl_reg,\
+ sreg->register_info.enable_mask);
+
+ do_gettimeofday(&last_enabled);
+ mutex_unlock(&enable_mutex);
+
+ return 0;
+}
+
+static int hisi_regulator_disable(struct regulator_dev *dev)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+
+ /* set enable register to 0 */
+ hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
+ sreg->register_info.enable_mask, 0);
+
+ do_gettimeofday(&sreg->last_off_time);
+
+ return 0;
+}
+
+static int hisi_regulator_get_voltage(struct regulator_dev *dev)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+ u32 reg_val, selector;
+
+ /* get voltage selector */
+ reg_val = hisi_pmic_read(pmic, sreg->register_info.vset_reg);
+ BRAND_DEBUG("<[%s]: vset_reg=0x%x>\n", __func__, sreg->register_info.vset_reg);
+
+ selector = (reg_val & sreg->register_info.vset_mask) >>
+ (ffs(sreg->register_info.vset_mask) - 1);
+
+ return sreg->rdesc.ops->list_voltage(dev, selector);
+}
+
+static int hisi_regulator_set_voltage(struct regulator_dev *dev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+ u32 vsel;
+ int ret = 0;
+
+ for (vsel = 0; vsel < sreg->rdesc.n_voltages; vsel++) {
+ int uV = sreg->rdesc.volt_table[vsel];
+ /* Break at the first in-range value */
+ if (min_uV <= uV && uV <= max_uV)
+ break;
+ }
+
+ /* unlikely to happen. sanity test done by regulator core */
+ if (unlikely(vsel == sreg->rdesc.n_voltages))
+ return -EINVAL;
+
+ *selector = vsel;
+ /* set voltage selector */
+ hisi_pmic_rmw(pmic, sreg->register_info.vset_reg,
+ sreg->register_info.vset_mask,
+ vsel << (ffs(sreg->register_info.vset_mask) - 1));
+
+ BRAND_DEBUG("<[%s]: vset_reg=0x%x, vset_mask=0x%x, value=0x%x>\n", __func__,\
+ sreg->register_info.vset_reg,\
+ sreg->register_info.vset_mask,\
+ vsel << (ffs(sreg->register_info.vset_mask) - 1)\
+ );
+
+ return ret;
+}
+
+static unsigned int hisi_regulator_get_mode(struct regulator_dev *dev)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+ u32 reg_val;
+
+ reg_val = hisi_pmic_read(pmic, sreg->register_info.ctrl_reg);
+ BRAND_DEBUG("<[%s]: reg_val=%d, ctrl_reg=0x%x, eco_mode_mask=0x%x>\n", __func__, reg_val,\
+ sreg->register_info.ctrl_reg,\
+ sreg->register_info.eco_mode_mask\
+ );
+
+ if (reg_val & sreg->register_info.eco_mode_mask)
+ return REGULATOR_MODE_IDLE;
+ else
+ return REGULATOR_MODE_NORMAL;
+}
+
+static int hisi_regulator_set_mode(struct regulator_dev *dev,
+ unsigned int mode)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+ struct hisi_pmic *pmic = rdev_to_pmic(dev);
+ u32 eco_mode;
+
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ eco_mode = HISI_ECO_MODE_DISABLE;
+ break;
+ case REGULATOR_MODE_IDLE:
+ eco_mode = HISI_ECO_MODE_ENABLE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* set mode */
+ hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
+ sreg->register_info.eco_mode_mask,
+ eco_mode << (ffs(sreg->register_info.eco_mode_mask) - 1));
+
+ BRAND_DEBUG("<[%s]: ctrl_reg=0x%x, eco_mode_mask=0x%x, value=0x%x>\n", __func__,\
+ sreg->register_info.ctrl_reg,\
+ sreg->register_info.eco_mode_mask,\
+ eco_mode << (ffs(sreg->register_info.eco_mode_mask) - 1)\
+ );
+ return 0;
+}
+
+
+unsigned int hisi_regulator_get_optimum_mode(struct regulator_dev *dev,
+ int input_uV, int output_uV, int load_uA)
+{
+ struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+
+ if ((load_uA == 0) || ((unsigned int)load_uA > sreg->eco_uA))
+ return REGULATOR_MODE_NORMAL;
+ else
+ return REGULATOR_MODE_IDLE;
+}
+
+static int hisi_dt_parse_common(struct hisi_regulator *sreg,
+ struct spmi_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct regulator_desc *rdesc = &sreg->rdesc;
+ unsigned int register_info[3] = {0};
+ int ret = 0;
+
+ /* parse .register_info.ctrl_reg */
+ ret = of_property_read_u32_array(np, "hisilicon,hisi-ctrl",
+ register_info, 3);
+ if (ret) {
+ dev_err(dev, "no hisilicon,hisi-ctrl property set\n");
+ goto dt_parse_common_end;
+ }
+ sreg->register_info.ctrl_reg = register_info[0];
+ sreg->register_info.enable_mask = register_info[1];
+ sreg->register_info.eco_mode_mask = register_info[2];
+
+ /* parse .register_info.vset_reg */
+ ret = of_property_read_u32_array(np, "hisilicon,hisi-vset",
+ register_info, 2);
+ if (ret) {
+ dev_err(dev, "no hisilicon,hisi-vset property set\n");
+ goto dt_parse_common_end;
+ }
+ sreg->register_info.vset_reg = register_info[0];
+ sreg->register_info.vset_mask = register_info[1];
+
+ /* parse .off-on-delay */
+ ret = of_property_read_u32(np, "hisilicon,hisi-off-on-delay-us",
+ &sreg->off_on_delay);
+ if (ret) {
+ dev_err(dev, "no hisilicon,hisi-off-on-delay-us property set\n");
+ goto dt_parse_common_end;
+ }
+
+ /* parse .enable_time */
+ ret = of_property_read_u32(np, "hisilicon,hisi-enable-time-us",
+ &rdesc->enable_time);
+ if (ret) {
+ dev_err(dev, "no hisilicon,hisi-enable-time-us property set\n");
+ goto dt_parse_common_end;
+ }
+
+ /* parse .eco_uA */
+ ret = of_property_read_u32(np, "hisilicon,hisi-eco-microamp",
+ &sreg->eco_uA);
+ if (ret) {
+ sreg->eco_uA = 0;
+ ret = 0;
+ }
+
+dt_parse_common_end:
+ return ret;
+}
+
+static int hisi_dt_parse_ldo(struct hisi_regulator *sreg,
+ struct spmi_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct regulator_desc *rdesc = &sreg->rdesc;
+ unsigned int *v_table;
+ int ret = 0;
+
+ /* parse .n_voltages, and .volt_table */
+ ret = of_property_read_u32(np, "hisilicon,hisi-n-voltages",
+ &rdesc->n_voltages);
+ if (ret) {
+ dev_err(dev, "no hisilicon,hisi-n-voltages property set\n");
+ goto dt_parse_ldo_end;
+ }
+
+ /* alloc space for .volt_table */
+ v_table = devm_kzalloc(dev, sizeof(unsigned int) * rdesc->n_voltages,
+ GFP_KERNEL);
+ if (unlikely(!v_table)) {
+ ret = -ENOMEM;
+ dev_err(dev, "no memory for .volt_table\n");
+ goto dt_parse_ldo_end;
+ }
+
+ ret = of_property_read_u32_array(np, "hisilicon,hisi-vset-table",
+ v_table, rdesc->n_voltages);
+ if (ret) {
+ dev_err(dev, "no hisilicon,hisi-vset-table property set\n");
+ goto dt_parse_ldo_end1;
+ }
+ rdesc->volt_table = v_table;
+
+ /* parse hisi regulator's dt common part */
+ ret = hisi_dt_parse_common(sreg, pdev);
+ if (ret) {
+ dev_err(dev, "failure in hisi_dt_parse_common\n");
+ goto dt_parse_ldo_end1;
+ }
+
+ return ret;
+
+dt_parse_ldo_end1:
+dt_parse_ldo_end:
+ return ret;
+}
+
+static struct regulator_ops hisi_ldo_rops = {
+ .is_enabled = hisi_regulator_is_enabled,
+ .enable = hisi_regulator_enable,
+ .disable = hisi_regulator_disable,
+ .list_voltage = regulator_list_voltage_table,
+ .get_voltage = hisi_regulator_get_voltage,
+ .set_voltage = hisi_regulator_set_voltage,
+ .get_mode = hisi_regulator_get_mode,
+ .set_mode = hisi_regulator_set_mode,
+ .get_optimum_mode = hisi_regulator_get_optimum_mode,
+};
+
+static const struct hisi_regulator hisi_regulator_ldo = {
+ .rdesc = {
+ .ops = &hisi_ldo_rops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ },
+ .dt_parse = hisi_dt_parse_ldo,
+};
+
+static struct of_device_id of_hisi_regulator_match_tbl[] = {
+ {
+ .compatible = "hisilicon-hisi-ldo",
+ .data = &hisi_regulator_ldo,
+ },
+ { /* end */ }
+};
+
+#ifdef CONFIG_HISI_PMIC_DEBUG
+extern void get_current_regulator_dev(struct seq_file *s);
+extern void set_regulator_state(char *ldo_name, int value);
+extern void get_regulator_state(char *ldo_name);
+extern int set_regulator_voltage(char *ldo_name, unsigned int vol_value);
+
+u32 pmu_atoi(char *s)
+{
+ char *p = s;
+ char c;
+ u64 ret = 0;
+ if (s == NULL)
+ return 0;
+ while ((c = *p++) != '\0') {
+ if ('0' <= c && c <= '9') {
+ ret *= 10;
+ ret += (u64)((unsigned char)c - '0');
+ if (ret > U32_MAX)
+ return 0;
+ } else {
+ break;
+ }
+ }
+ return (u32)ret;
+}
+static int dbg_hisi_regulator_show(struct seq_file *s, void *data)
+{
+ seq_printf(s, "\n\r");
+ seq_printf(s, "%-13s %-15s %-15s %-15s %-15s\n\r",
+ "LDO_NAME", "ON/OFF", "Use_count", "Open_count", "Always_on");
+ seq_printf(s, "-----------------------------------------"
+ "-----------------------------------------------\n\r");
+ get_current_regulator_dev(s);
+ return 0;
+}
+
+static int dbg_hisi_regulator_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dbg_hisi_regulator_show, inode->i_private);
+}
+
+static const struct file_operations debug_regulator_state_fops = {
+ .open = dbg_hisi_regulator_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int dbg_control_regulator_show(struct seq_file *s, void *data)
+{
+ printk(" \n\r \
+ ---------------------------------------------------------------------------------\n\r \
+ |usage: |\n\r \
+ | S = state R = read V = voltage |\n\r \
+ | set ldo state and voltage |\n\r \
+ | get ldo state and current voltage |\n\r \
+ |example: |\n\r \
+ | echo S ldo16 0 > control_regulator :disable ldo16 |\n\r \
+ | echo S ldo16 1 > control_regulator :enable ldo16 |\n\r \
+ | echo R ldo16 > control_regulator :get ldo16 state and voltage |\n\r \
+ | echo V ldo16 xxx > control_regulator :set ldo16 voltage |\n\r \
+ ---------------------------------------------------------------------------------\n\r");
+ return 0;
+}
+static ssize_t dbg_control_regulator_set_value(struct file *filp, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ char tmp[128] = {0};
+ char ptr[128] = {0};
+ char *vol = NULL;
+ char num = 0;
+ unsigned int i;
+ int next_flag = 1;
+
+ if (count >= 128) {
+ pr_info("error! buffer size big than internal buffer\n");
+ return -EFAULT;
+ }
+
+ if (copy_from_user(tmp, buffer, count)) {
+ pr_info("error!\n");
+ return -EFAULT;
+ }
+
+ if (tmp[0] == 'R' || tmp[0] == 'r') {
+ for (i = 2; i < (count - 1); i++) {
+ ptr[i - 2] = tmp[i];
+ }
+ ptr[i - 2] = '\0';
+ get_regulator_state(ptr);
+ } else if (tmp[0] == 'S' || tmp[0] == 's') {
+ for (i = 2; i < (count - 1); i++) {
+ if (tmp[i] == ' ') {
+ next_flag = 0;
+ ptr[i - 2] = '\0';
+ continue;
+ }
+ if (next_flag) {
+ ptr[i - 2] = tmp[i];
+ } else {
+ num = tmp[i] - 48;
+ }
+ }
+ set_regulator_state(ptr, num);
+ } else if (tmp[0] == 'V' || tmp[0] == 'v') {
+ for (i = 2; i < (count - 1); i++) {
+ if (tmp[i] == ' ') {
+ next_flag = 0;
+ ptr[i - 2] = '\0';
+ continue;
+ }
+ if (next_flag) {
+ ptr[i - 2] = tmp[i];
+ } else {
+ vol = &tmp[i];
+ break;
+ }
+ }
+ set_regulator_voltage(ptr, pmu_atoi(vol));
+ }
+
+ *ppos += count;
+
+ return count;
+}
+
+static int dbg_control_regulator_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return single_open(file, dbg_control_regulator_show, &inode->i_private);
+}
+
+static const struct file_operations set_control_regulator_fops = {
+ .open = dbg_control_regulator_open,
+ .read = seq_read,
+ .write = dbg_control_regulator_set_value,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
+static int hisi_regulator_probe(struct spmi_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct regulator_desc *rdesc;
+ struct regulator_dev *rdev;
+ struct hisi_regulator *sreg = NULL;
+ struct regulator_init_data *initdata;
+ struct regulator_config config = { };
+ const struct of_device_id *match;
+ struct regulation_constraints *constraint;
+ const char *supplyname = NULL;
+#ifdef CONFIG_HISI_PMIC_DEBUG
+ struct dentry *d;
+ static int debugfs_flag;
+#endif
+ unsigned int temp_modes;
+
+ const struct hisi_regulator *template = NULL;
+ int ret = 0;
+ /* to check which type of regulator this is */
+ match = of_match_device(of_hisi_regulator_match_tbl, &pdev->dev);
+ if (NULL == match) {
+ pr_err("get hisi regulator fail!\n\r");
+ return -EINVAL;
+ }
+
+ template = match->data;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(3, 13, 0))
+ initdata = of_get_regulator_init_data(dev, np, NULL);
+#else
+ initdata = of_get_regulator_init_data(dev, np);
+#endif
+ if (NULL == initdata) {
+ pr_err("get regulator init data error !\n");
+ return -EINVAL;
+ }
+
+ /* hisi regulator supports two modes */
+ constraint = &initdata->constraints;
+
+ ret = of_property_read_u32_array(np, "hisilicon,valid-modes-mask",
+ &(constraint->valid_modes_mask), 1);
+ if (ret) {
+ pr_err("no hisilicon,valid-modes-mask property set\n");
+ ret = -ENODEV;
+ return ret;
+ }
+ ret = of_property_read_u32_array(np, "hisilicon,valid-idle-mask",
+ &temp_modes, 1);
+ if (ret) {
+ pr_err("no hisilicon,valid-modes-mask property set\n");
+ ret = -ENODEV;
+ return ret;
+ }
+ constraint->valid_ops_mask |= temp_modes;
+
+ sreg = kmemdup(template, sizeof(*sreg), GFP_KERNEL);
+ if (!sreg) {
+ pr_err("template kememdup is fail. \n");
+ return -ENOMEM;
+ }
+ sreg->name = initdata->constraints.name;
+ rdesc = &sreg->rdesc;
+ rdesc->name = sreg->name;
+ rdesc->min_uV = initdata->constraints.min_uV;
+ supplyname = of_get_property(np, "hisilicon,supply_name", NULL);
+ if (supplyname != NULL) {
+ initdata->supply_regulator = supplyname;
+ }
+
+ /* to parse device tree data for regulator specific */
+ ret = sreg->dt_parse(sreg, pdev);
+ if (ret) {
+ dev_err(dev, "device tree parameter parse error!\n");
+ goto hisi_probe_end;
+ }
+
+ config.dev = &pdev->dev;
+ config.init_data = initdata;
+ config.driver_data = sreg;
+ config.of_node = pdev->dev.of_node;
+
+ /* register regulator */
+ rdev = regulator_register(rdesc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(dev, "failed to register %s\n",
+ rdesc->name);
+ ret = PTR_ERR(rdev);
+ goto hisi_probe_end;
+ }
+
+ BRAND_DEBUG("[%s]:valid_modes_mask[0x%x], valid_ops_mask[0x%x]\n", rdesc->name,\
+ constraint->valid_modes_mask, constraint->valid_ops_mask);
+
+ dev_set_drvdata(dev, rdev);
+#ifdef CONFIG_HISI_PMIC_DEBUG
+ if (debugfs_flag == 0) {
+ d = debugfs_create_dir("hisi_regulator_debugfs", NULL);
+ if (!d) {
+ dev_err(dev, "failed to create hisi regulator debugfs dir !\n");
+ ret = -ENOMEM;
+ goto hisi_probe_fail;
+ }
+ (void) debugfs_create_file("regulator_state", S_IRUSR,
+ d, NULL, &debug_regulator_state_fops);
+
+ (void) debugfs_create_file("control_regulator", S_IRUSR,
+ d, NULL, &set_control_regulator_fops);
+ debugfs_flag = 1;
+ }
+#endif
+
+#ifdef CONFIG_HISI_PMIC_DEBUG
+hisi_probe_fail:
+ if (ret)
+ regulator_unregister(rdev);
+#endif
+hisi_probe_end:
+ if (ret)
+ kfree(sreg);
+ return ret;
+}
+
+static void hisi_regulator_remove(struct spmi_device *pdev)
+{
+ struct regulator_dev *rdev = dev_get_drvdata(&pdev->dev);
+ struct hisi_regulator *sreg = rdev_get_drvdata(rdev);
+
+ regulator_unregister(rdev);
+
+ /* TODO: should i worry about that? devm_kzalloc */
+ if (sreg->rdesc.volt_table)
+ devm_kfree(&pdev->dev, (unsigned int *)sreg->rdesc.volt_table);
+
+ kfree(sreg);
+}
+static int hisi_regulator_suspend(struct device *dev, pm_message_t state)
+{
+ struct hisi_regulator *hisi_regulator = dev_get_drvdata(dev);
+
+ if (NULL == hisi_regulator) {
+ pr_err("%s:regulator is NULL\n", __func__);
+ return -ENOMEM;
+ }
+
+ pr_info("%s:+\n", __func__);
+ pr_info("%s:-\n", __func__);
+
+ return 0;
+}/*lint !e715 */
+
+static int hisi_regulator_resume(struct device *dev)
+{
+ struct hisi_regulator *hisi_regulator = dev_get_drvdata(dev);
+
+ if (NULL == hisi_regulator) {
+ pr_err("%s:regulator is NULL\n", __func__);
+ return -ENOMEM;
+ }
+
+ pr_info("%s:+\n", __func__);
+ pr_info("%s:-\n", __func__);
+
+ return 0;
+}
+
+static struct spmi_driver hisi_pmic_driver = {
+ .driver = {
+ .name = "hisi_regulator",
+ .owner = THIS_MODULE,
+ .of_match_table = of_hisi_regulator_match_tbl,
+ .suspend = hisi_regulator_suspend,
+ .resume = hisi_regulator_resume,
+ },
+ .probe = hisi_regulator_probe,
+ .remove = hisi_regulator_remove,
+};
+
+static int __init hisi_regulator_init(void)
+{
+ return spmi_driver_register(&hisi_pmic_driver);
+}
+
+static void __exit hisi_regulator_exit(void)
+{
+ spmi_driver_unregister(&hisi_pmic_driver);
+}
+
+fs_initcall(hisi_regulator_init);
+module_exit(hisi_regulator_exit);
+
+MODULE_DESCRIPTION("Hisi regulator driver");
+MODULE_LICENSE("GPL v2");
+
--
2.26.2
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