6 #include <linux/kernel.h>
7 #include <linux/regulator/driver.h>
8 #include <linux/delay.h>
9 #include <linux/slab.h>
10 #include <linux/mutex.h>
11 #include <linux/module.h>
12 #include <linux/of_irq.h>
13 #include <linux/of_gpio.h>
15 #include <linux/of_device.h>
16 #include <linux/regulator/of_regulator.h>
17 #include <linux/regulator/driver.h>
18 #include <linux/regulator/machine.h>
19 #include <linux/pinctrl/consumer.h>
20 #include <linux/regulator/rockchip_io_vol_domain.h>
22 struct io_domain_port *g_uap;
24 int io_domain_regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
26 int old_voltage,ret =0;
28 old_voltage = io_domain_regulator_get_voltage(regulator);
29 if (IS_ERR(g_uap->pins_3v3) ||IS_ERR(g_uap->pins_1v8) ){
30 printk("IO_DOMAIN:ERROR:The io vol domin is not exit. %s\n",__func__);
33 if (min_uV == old_voltage){
34 IO_DOMAIN_DBG("IO_DOMAIN:the vol is not modify,not need to set io vol domain. %s \n",__func__);
37 else if (min_uV > old_voltage){
38 if( min_uV > IO_VOL_DOMAIN_3V3){
39 pinctrl_select_state(g_uap->pctl, g_uap->pins_3v3);
40 IO_DOMAIN_DBG("IO_DOMAIN:set io domain 3.3v. %s \n",__func__);
42 else if (min_uV > IO_VOL_DOMAIN_1V8){
43 pinctrl_select_state(g_uap->pctl, g_uap->pins_1v8);
44 IO_DOMAIN_DBG("IO_DOMAIN:set io domain 1.8v. %s \n",__func__);
46 ret = regulator_set_voltage(regulator,min_uV,max_uV);
48 else if (min_uV < old_voltage){
49 ret = regulator_set_voltage(regulator,min_uV,max_uV);
50 if( min_uV > IO_VOL_DOMAIN_3V3){
51 pinctrl_select_state(g_uap->pctl, g_uap->pins_3v3);
52 IO_DOMAIN_DBG("IO_DOMAIN:set io domain 3.3v. %s \n",__func__);
54 else if (min_uV > IO_VOL_DOMAIN_1V8){
55 pinctrl_select_state(g_uap->pctl, g_uap->pins_1v8);
56 IO_DOMAIN_DBG("IO_DOMAIN:set io domain 1.8v. %s \n",__func__);
64 #if defined(CONFIG_PM)
65 static int rk_io_vol_domain_suspend(struct platform_device *pdev, pm_message_t state)
70 static int rk_io_vol_domain_resume(struct platform_device *pdev)
75 #define rk_io_vol_domain_suspend NULL
76 #define rk_io_vol_domain_resume NULL
79 static int rk_io_vol_domain_probe(struct platform_device *pdev)
81 struct io_domain_port *uap;
82 struct device_node *io_domain_node ;
83 struct regulator *vol_regulator;
84 struct io_domain_device *io_vol_dev = NULL;
87 io_vol_dev = devm_kzalloc(&pdev->dev, sizeof(struct io_domain_device), GFP_KERNEL);
89 dev_err(&pdev->dev, "no memory for state\n");
92 platform_set_drvdata(pdev, io_vol_dev);
93 io_vol_dev->dev = &pdev->dev;
95 uap = devm_kzalloc(&pdev->dev, sizeof(struct io_domain_port),
98 printk("uap is not set %s,line=%d\n", __func__,__LINE__);
101 uap->pctl = devm_pinctrl_get(io_vol_dev->dev);
102 uap->pins_default = pinctrl_lookup_state(uap->pctl,"default");
103 uap->pins_1v8 = pinctrl_lookup_state(uap->pctl, "1.8V");
104 uap->pins_3v3 = pinctrl_lookup_state(uap->pctl,"3.3V");
107 io_domain_node = of_node_get(pdev->dev.of_node);
108 if (!io_domain_node) {
109 printk("could not find rk_io_vol_domain-node\n");
113 io_domain_node->name = of_get_property(io_domain_node, "regulator-name", NULL);
115 if (io_domain_node->name== NULL) {
116 printk("%s io_domain_node->name(%s) get regulator_name err, ret:%d\n", __func__, io_domain_node->name,ret);
119 vol_regulator = regulator_get(NULL,io_domain_node->name);
120 if (IS_ERR(vol_regulator)){
121 pinctrl_select_state(uap->pctl, uap->pins_default);
122 IO_DOMAIN_DBG("IO_DOMAIN:ERROR:The io vol domin regulator name is not exit,set it by defult. %s %s\n",__func__,io_domain_node->name);
126 vol = regulator_get_voltage(vol_regulator);
127 if (vol > IO_VOL_DOMAIN_3V3){
128 pinctrl_select_state(uap->pctl, uap->pins_3v3);
129 IO_DOMAIN_DBG("IO_DOMAIN:set io domain 3.3v. %s %s = %d\n",__func__,io_domain_node->name,vol);
131 else if (vol > IO_VOL_DOMAIN_1V8){
132 pinctrl_select_state(uap->pctl, uap->pins_1v8);
133 IO_DOMAIN_DBG("IO_DOMAIN:set io domain 1.8v. %s %s = %d\n",__func__,io_domain_node->name,vol);
136 pinctrl_select_state(uap->pctl, uap->pins_default);
137 IO_DOMAIN_DBG("IO_DOMAIN:ERROR:The io vol domin is not exit,set it by defult. %s %s\n",__func__,io_domain_node->name);
140 regulator_put(vol_regulator);
144 static int rk_io_vol_domain_remove(struct platform_device *pdev)
150 #if defined(CONFIG_OF)
151 static const struct of_device_id rk_io_vol_domain_dt_ids[] = {
152 {.compatible = "rockchip,io_vol_domain", .data = NULL, },
157 static struct platform_driver rk_io_vol_domain_driver = {
158 .probe = rk_io_vol_domain_probe,
159 .remove = rk_io_vol_domain_remove,
161 .name = "rk_io_vol_domain",
162 .owner = THIS_MODULE,
163 .of_match_table = of_match_ptr(rk_io_vol_domain_dt_ids),
165 .suspend = rk_io_vol_domain_suspend,
166 .resume = rk_io_vol_domain_resume,
169 static int __init rk_io_vol_domain_module_init(void)
171 return platform_driver_register(&rk_io_vol_domain_driver);
174 static void __exit rk_io_vol_domain_module_exit(void)
176 platform_driver_unregister(&rk_io_vol_domain_driver);
179 fs_initcall(rk_io_vol_domain_module_init);
180 module_exit(rk_io_vol_domain_module_exit);
182 MODULE_LICENSE("GPL");
183 MODULE_AUTHOR("rockchip");
184 MODULE_DESCRIPTION("rk io domain setting");