1 // SPDX-License-Identifier: GPL-2.0-only
3 * Battery and Power Management code for the Sharp SL-C7xx
5 * Copyright (c) 2005 Richard Purdie
8 #include <linux/module.h>
9 #include <linux/stat.h>
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/gpio-pxa.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/apm-emulation.h>
21 #include <asm/mach-types.h>
24 #include "pxa2xx-regs.h"
25 #include "sharpsl_pm.h"
29 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
30 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
31 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
32 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
33 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
34 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
36 static struct gpio charger_gpios[] = {
37 { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
38 { CORGI_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
39 { CORGI_GPIO_CHRG_UKN, GPIOF_OUT_INIT_LOW, "Charger Unknown" },
40 { CORGI_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
41 { CORGI_GPIO_KEY_INT, GPIOF_IN, "Key Interrupt" },
42 { CORGI_GPIO_WAKEUP, GPIOF_IN, "System wakeup notification" },
45 static void corgi_charger_init(void)
47 gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
50 static void corgi_measure_temp(int on)
52 gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
55 static void corgi_charge(int on)
58 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
59 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
60 gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
62 gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
63 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
66 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
67 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
71 static void corgi_discharge(int on)
73 gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
76 static void corgi_presuspend(void)
80 static void corgi_postsuspend(void)
85 * Check what brought us out of the suspend.
86 * Return: 0 to sleep, otherwise wake
88 static int corgi_should_wakeup(unsigned int resume_on_alarm)
92 dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
93 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
94 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
95 gpio_get_value(CORGI_GPIO_CHRG_FULL),
96 gpio_get_value(CORGI_GPIO_KEY_INT),
97 gpio_get_value(CORGI_GPIO_WAKEUP));
99 if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
100 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
102 dev_dbg(sharpsl_pm.dev, "ac insert\n");
103 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
106 dev_dbg(sharpsl_pm.dev, "ac remove\n");
107 sharpsl_pm_led(SHARPSL_LED_OFF);
108 sharpsl_pm.machinfo->charge(0);
109 sharpsl_pm.charge_mode = CHRG_OFF;
113 if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
114 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
116 if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
117 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
119 if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
120 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
122 if (resume_on_alarm && (PEDR & PWER_RTC))
123 is_resume |= PWER_RTC;
125 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
129 static bool corgi_charger_wakeup(void)
131 return !gpio_get_value(CORGI_GPIO_AC_IN) ||
132 !gpio_get_value(CORGI_GPIO_KEY_INT) ||
133 !gpio_get_value(CORGI_GPIO_WAKEUP);
136 unsigned long corgipm_read_devdata(int type)
139 case SHARPSL_STATUS_ACIN:
140 return !gpio_get_value(CORGI_GPIO_AC_IN);
141 case SHARPSL_STATUS_LOCK:
142 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
143 case SHARPSL_STATUS_CHRGFULL:
144 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
145 case SHARPSL_STATUS_FATAL:
146 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
147 case SHARPSL_ACIN_VOLT:
148 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
149 case SHARPSL_BATT_TEMP:
150 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
151 case SHARPSL_BATT_VOLT:
153 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
157 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
158 .init = corgi_charger_init,
160 .gpio_batlock = CORGI_GPIO_BAT_COVER,
161 .gpio_acin = CORGI_GPIO_AC_IN,
162 .gpio_batfull = CORGI_GPIO_CHRG_FULL,
163 .discharge = corgi_discharge,
164 .charge = corgi_charge,
165 .measure_temp = corgi_measure_temp,
166 .presuspend = corgi_presuspend,
167 .postsuspend = corgi_postsuspend,
168 .read_devdata = corgipm_read_devdata,
169 .charger_wakeup = corgi_charger_wakeup,
170 .should_wakeup = corgi_should_wakeup,
171 #if defined(CONFIG_LCD_CORGI)
172 .backlight_limit = corgi_lcd_limit_intensity,
174 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
175 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
176 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
177 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
178 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
179 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
181 .bat_levels_noac = sharpsl_battery_levels_noac,
182 .bat_levels_acin = sharpsl_battery_levels_acin,
183 .status_high_acin = 188,
184 .status_low_acin = 178,
185 .status_high_noac = 185,
186 .status_low_noac = 175,
189 static struct platform_device *corgipm_device;
191 static int corgipm_init(void)
195 if (!machine_is_corgi() && !machine_is_shepherd()
196 && !machine_is_husky())
199 corgipm_device = platform_device_alloc("sharpsl-pm", -1);
203 if (!machine_is_corgi())
204 corgi_pm_machinfo.batfull_irq = 1;
206 corgipm_device->dev.platform_data = &corgi_pm_machinfo;
207 ret = platform_device_add(corgipm_device);
210 platform_device_put(corgipm_device);
215 static void corgipm_exit(void)
217 platform_device_unregister(corgipm_device);
220 module_init(corgipm_init);
221 module_exit(corgipm_exit);