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255 lines
6.8 KiB
255 lines
6.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Battery and Power Management code for the Sharp SL-Cxx00 |
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* |
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* Copyright (c) 2005 Richard Purdie |
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*/ |
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#include <linux/module.h> |
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#include <linux/stat.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/delay.h> |
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#include <linux/gpio.h> |
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#include <linux/gpio-pxa.h> |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <linux/apm-emulation.h> |
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#include <asm/irq.h> |
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#include <asm/mach-types.h> |
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#include <mach/hardware.h> |
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#include <mach/spitz.h> |
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#include "pxa27x.h" |
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#include "sharpsl_pm.h" |
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#include "generic.h" |
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#define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ |
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#define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ |
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#define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ |
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#define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ |
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#define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ |
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#define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ |
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static int spitz_last_ac_status; |
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static struct gpio spitz_charger_gpios[] = { |
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{ SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" }, |
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{ SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" }, |
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{ SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" }, |
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{ SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" }, |
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{ SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" }, |
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{ SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" }, |
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}; |
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static void spitz_charger_init(void) |
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{ |
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gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios)); |
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} |
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static void spitz_measure_temp(int on) |
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{ |
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gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); |
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} |
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static void spitz_charge(int on) |
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{ |
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if (on) { |
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if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { |
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gpio_set_value(SPITZ_GPIO_JK_B, 1); |
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gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); |
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} else { |
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gpio_set_value(SPITZ_GPIO_JK_B, 0); |
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gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); |
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} |
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} else { |
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gpio_set_value(SPITZ_GPIO_JK_B, 0); |
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gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); |
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} |
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} |
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static void spitz_discharge(int on) |
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{ |
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gpio_set_value(SPITZ_GPIO_JK_A, on); |
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} |
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/* HACK - For unknown reasons, accurate voltage readings are only made with a load |
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on the power bus which the green led on spitz provides */ |
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static void spitz_discharge1(int on) |
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{ |
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gpio_set_value(SPITZ_GPIO_LED_GREEN, on); |
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} |
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static unsigned long gpio18_config = GPIO18_GPIO; |
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static void spitz_presuspend(void) |
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{ |
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spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); |
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/* GPIO Sleep Register */ |
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PGSR0 = 0x00144018; |
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PGSR1 = 0x00EF0000; |
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if (machine_is_akita()) { |
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PGSR2 = 0x2121C000; |
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PGSR3 = 0x00600400; |
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} else { |
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PGSR2 = 0x0121C000; |
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PGSR3 = 0x00600000; |
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} |
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PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; |
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PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; |
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PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; |
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PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; |
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PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); |
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pxa2xx_mfp_config(&gpio18_config, 1); |
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gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); |
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gpio_free(18); |
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PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); |
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PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); |
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PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; |
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PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); |
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PKSR = 0xffffffff; /* clear */ |
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/* nRESET_OUT Disable */ |
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PSLR |= PSLR_SL_ROD; |
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/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ |
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PCFR = PCFR_GPR_EN | PCFR_OPDE; |
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} |
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static void spitz_postsuspend(void) |
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{ |
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} |
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static int spitz_should_wakeup(unsigned int resume_on_alarm) |
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{ |
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int is_resume = 0; |
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int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); |
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if (spitz_last_ac_status != acin) { |
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if (acin) { |
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/* charge on */ |
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sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; |
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dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); |
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} else { |
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/* charge off */ |
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dev_dbg(sharpsl_pm.dev, "AC Removed\n"); |
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sharpsl_pm_led(SHARPSL_LED_OFF); |
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sharpsl_pm.machinfo->charge(0); |
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sharpsl_pm.charge_mode = CHRG_OFF; |
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} |
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spitz_last_ac_status = acin; |
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/* Return to suspend as this must be what we were woken for */ |
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return 0; |
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} |
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if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) |
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is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); |
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if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) |
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is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); |
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if (resume_on_alarm && (PEDR & PWER_RTC)) |
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is_resume |= PWER_RTC; |
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dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); |
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return is_resume; |
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} |
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static bool spitz_charger_wakeup(void) |
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{ |
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return !gpio_get_value(SPITZ_GPIO_KEY_INT) || |
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gpio_get_value(SPITZ_GPIO_SYNC); |
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} |
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unsigned long spitzpm_read_devdata(int type) |
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{ |
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switch (type) { |
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case SHARPSL_STATUS_ACIN: |
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return !gpio_get_value(SPITZ_GPIO_AC_IN); |
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case SHARPSL_STATUS_LOCK: |
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return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock); |
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case SHARPSL_STATUS_CHRGFULL: |
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return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull); |
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case SHARPSL_STATUS_FATAL: |
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return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal); |
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case SHARPSL_ACIN_VOLT: |
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return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); |
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case SHARPSL_BATT_TEMP: |
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return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); |
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case SHARPSL_BATT_VOLT: |
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default: |
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return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); |
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} |
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} |
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struct sharpsl_charger_machinfo spitz_pm_machinfo = { |
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.init = spitz_charger_init, |
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.exit = NULL, |
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.gpio_batlock = SPITZ_GPIO_BAT_COVER, |
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.gpio_acin = SPITZ_GPIO_AC_IN, |
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.gpio_batfull = SPITZ_GPIO_CHRG_FULL, |
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.batfull_irq = 1, |
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.gpio_fatal = SPITZ_GPIO_FATAL_BAT, |
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.discharge = spitz_discharge, |
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.discharge1 = spitz_discharge1, |
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.charge = spitz_charge, |
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.measure_temp = spitz_measure_temp, |
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.presuspend = spitz_presuspend, |
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.postsuspend = spitz_postsuspend, |
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.read_devdata = spitzpm_read_devdata, |
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.charger_wakeup = spitz_charger_wakeup, |
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.should_wakeup = spitz_should_wakeup, |
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#if defined(CONFIG_LCD_CORGI) |
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.backlight_limit = corgi_lcd_limit_intensity, |
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#endif |
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.charge_on_volt = SHARPSL_CHARGE_ON_VOLT, |
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.charge_on_temp = SHARPSL_CHARGE_ON_TEMP, |
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.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, |
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.charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, |
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.fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, |
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.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, |
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.bat_levels = 40, |
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.bat_levels_noac = sharpsl_battery_levels_noac, |
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.bat_levels_acin = sharpsl_battery_levels_acin, |
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.status_high_acin = 188, |
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.status_low_acin = 178, |
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.status_high_noac = 185, |
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.status_low_noac = 175, |
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}; |
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static struct platform_device *spitzpm_device; |
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static int spitzpm_init(void) |
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{ |
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int ret; |
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if (!machine_is_spitz() && !machine_is_akita() |
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&& !machine_is_borzoi()) |
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return -ENODEV; |
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spitzpm_device = platform_device_alloc("sharpsl-pm", -1); |
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if (!spitzpm_device) |
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return -ENOMEM; |
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spitzpm_device->dev.platform_data = &spitz_pm_machinfo; |
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ret = platform_device_add(spitzpm_device); |
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if (ret) |
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platform_device_put(spitzpm_device); |
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return ret; |
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} |
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static void spitzpm_exit(void) |
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{ |
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platform_device_unregister(spitzpm_device); |
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} |
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module_init(spitzpm_init); |
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module_exit(spitzpm_exit);
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