/*
* Base driver for Maxim MAX8925
*
- * Copyright (C) 2009 Marvell International Ltd.
+ * Copyright (C) 2009-2010 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
*
* This program is free software; you can redistribute it and/or modify
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
+#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8925.h>
-#define IRQ_MODE_STATUS 0
-#define IRQ_MODE_MASK 1
-
static struct resource backlight_resources[] = {
{
.name = "max8925-backlight",
},
};
+static struct resource power_supply_resources[] = {
+ {
+ .name = "max8925-power",
+ .start = MAX8925_CHG_IRQ1,
+ .end = MAX8925_CHG_IRQ1_MASK,
+ .flags = IORESOURCE_IO,
+ },
+};
+
+static struct mfd_cell power_devs[] = {
+ {
+ .name = "max8925-power",
+ .num_resources = 1,
+ .resources = &power_supply_resources[0],
+ .id = -1,
+ },
+};
+
+static struct resource rtc_resources[] = {
+ {
+ .name = "max8925-rtc",
+ .start = MAX8925_RTC_IRQ,
+ .end = MAX8925_RTC_IRQ_MASK,
+ .flags = IORESOURCE_IO,
+ },
+};
+
+static struct mfd_cell rtc_devs[] = {
+ {
+ .name = "max8925-rtc",
+ .num_resources = 1,
+ .resources = &rtc_resources[0],
+ .id = -1,
+ },
+};
+
#define MAX8925_REG_RESOURCE(_start, _end) \
{ \
.start = MAX8925_##_start, \
MAX8925_REG_DEVS(LDO20),
};
-static int __get_irq_offset(struct max8925_chip *chip, int irq, int mode,
- int *offset, int *bit)
+enum {
+ FLAGS_ADC = 1, /* register in ADC component */
+ FLAGS_RTC, /* register in RTC component */
+};
+
+struct max8925_irq_data {
+ int reg;
+ int mask_reg;
+ int enable; /* enable or not */
+ int offs; /* bit offset in mask register */
+ int flags;
+ int tsc_irq;
+};
+
+static struct max8925_irq_data max8925_irqs[] = {
+ [MAX8925_IRQ_VCHG_DC_OVP] = {
+ .reg = MAX8925_CHG_IRQ1,
+ .mask_reg = MAX8925_CHG_IRQ1_MASK,
+ .offs = 1 << 0,
+ },
+ [MAX8925_IRQ_VCHG_DC_F] = {
+ .reg = MAX8925_CHG_IRQ1,
+ .mask_reg = MAX8925_CHG_IRQ1_MASK,
+ .offs = 1 << 1,
+ },
+ [MAX8925_IRQ_VCHG_DC_R] = {
+ .reg = MAX8925_CHG_IRQ1,
+ .mask_reg = MAX8925_CHG_IRQ1_MASK,
+ .offs = 1 << 2,
+ },
+ [MAX8925_IRQ_VCHG_USB_OVP] = {
+ .reg = MAX8925_CHG_IRQ1,
+ .mask_reg = MAX8925_CHG_IRQ1_MASK,
+ .offs = 1 << 3,
+ },
+ [MAX8925_IRQ_VCHG_USB_F] = {
+ .reg = MAX8925_CHG_IRQ1,
+ .mask_reg = MAX8925_CHG_IRQ1_MASK,
+ .offs = 1 << 4,
+ },
+ [MAX8925_IRQ_VCHG_USB_R] = {
+ .reg = MAX8925_CHG_IRQ1,
+ .mask_reg = MAX8925_CHG_IRQ1_MASK,
+ .offs = 1 << 5,
+ },
+ [MAX8925_IRQ_VCHG_THM_OK_R] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 0,
+ },
+ [MAX8925_IRQ_VCHG_THM_OK_F] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 1,
+ },
+ [MAX8925_IRQ_VCHG_SYSLOW_F] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 2,
+ },
+ [MAX8925_IRQ_VCHG_SYSLOW_R] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 3,
+ },
+ [MAX8925_IRQ_VCHG_RST] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 4,
+ },
+ [MAX8925_IRQ_VCHG_DONE] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 5,
+ },
+ [MAX8925_IRQ_VCHG_TOPOFF] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 6,
+ },
+ [MAX8925_IRQ_VCHG_TMR_FAULT] = {
+ .reg = MAX8925_CHG_IRQ2,
+ .mask_reg = MAX8925_CHG_IRQ2_MASK,
+ .offs = 1 << 7,
+ },
+ [MAX8925_IRQ_GPM_RSTIN] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 0,
+ },
+ [MAX8925_IRQ_GPM_MPL] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 1,
+ },
+ [MAX8925_IRQ_GPM_SW_3SEC] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 2,
+ },
+ [MAX8925_IRQ_GPM_EXTON_F] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 3,
+ },
+ [MAX8925_IRQ_GPM_EXTON_R] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 4,
+ },
+ [MAX8925_IRQ_GPM_SW_1SEC] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 5,
+ },
+ [MAX8925_IRQ_GPM_SW_F] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 6,
+ },
+ [MAX8925_IRQ_GPM_SW_R] = {
+ .reg = MAX8925_ON_OFF_IRQ1,
+ .mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
+ .offs = 1 << 7,
+ },
+ [MAX8925_IRQ_GPM_SYSCKEN_F] = {
+ .reg = MAX8925_ON_OFF_IRQ2,
+ .mask_reg = MAX8925_ON_OFF_IRQ2_MASK,
+ .offs = 1 << 0,
+ },
+ [MAX8925_IRQ_GPM_SYSCKEN_R] = {
+ .reg = MAX8925_ON_OFF_IRQ2,
+ .mask_reg = MAX8925_ON_OFF_IRQ2_MASK,
+ .offs = 1 << 1,
+ },
+ [MAX8925_IRQ_RTC_ALARM1] = {
+ .reg = MAX8925_RTC_IRQ,
+ .mask_reg = MAX8925_RTC_IRQ_MASK,
+ .offs = 1 << 2,
+ .flags = FLAGS_RTC,
+ },
+ [MAX8925_IRQ_RTC_ALARM0] = {
+ .reg = MAX8925_RTC_IRQ,
+ .mask_reg = MAX8925_RTC_IRQ_MASK,
+ .offs = 1 << 3,
+ .flags = FLAGS_RTC,
+ },
+ [MAX8925_IRQ_TSC_STICK] = {
+ .reg = MAX8925_TSC_IRQ,
+ .mask_reg = MAX8925_TSC_IRQ_MASK,
+ .offs = 1 << 0,
+ .flags = FLAGS_ADC,
+ .tsc_irq = 1,
+ },
+ [MAX8925_IRQ_TSC_NSTICK] = {
+ .reg = MAX8925_TSC_IRQ,
+ .mask_reg = MAX8925_TSC_IRQ_MASK,
+ .offs = 1 << 1,
+ .flags = FLAGS_ADC,
+ .tsc_irq = 1,
+ },
+};
+
+static inline struct max8925_irq_data *irq_to_max8925(struct max8925_chip *chip,
+ int irq)
{
- if (!offset || !bit)
- return -EINVAL;
+ return &max8925_irqs[irq - chip->irq_base];
+}
- switch (chip->chip_id) {
- case MAX8925_GPM:
- *bit = irq % BITS_PER_BYTE;
- if (irq < (BITS_PER_BYTE << 1)) { /* irq = [0,15] */
- *offset = (mode) ? MAX8925_CHG_IRQ1_MASK
- : MAX8925_CHG_IRQ1;
- if (irq >= BITS_PER_BYTE)
- (*offset)++;
- } else { /* irq = [16,31] */
- *offset = (mode) ? MAX8925_ON_OFF_IRQ1_MASK
- : MAX8925_ON_OFF_IRQ1;
- if (irq >= (BITS_PER_BYTE * 3))
- (*offset)++;
+static irqreturn_t max8925_irq(int irq, void *data)
+{
+ struct max8925_chip *chip = data;
+ struct max8925_irq_data *irq_data;
+ struct i2c_client *i2c;
+ int read_reg = -1, value = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
+ irq_data = &max8925_irqs[i];
+ /* TSC IRQ should be serviced in max8925_tsc_irq() */
+ if (irq_data->tsc_irq)
+ continue;
+ if (irq_data->flags == FLAGS_RTC)
+ i2c = chip->rtc;
+ else if (irq_data->flags == FLAGS_ADC)
+ i2c = chip->adc;
+ else
+ i2c = chip->i2c;
+ if (read_reg != irq_data->reg) {
+ read_reg = irq_data->reg;
+ value = max8925_reg_read(i2c, irq_data->reg);
}
- break;
- case MAX8925_ADC:
- *bit = irq % BITS_PER_BYTE;
- *offset = (mode) ? MAX8925_TSC_IRQ_MASK : MAX8925_TSC_IRQ;
- break;
- default:
- goto out;
+ if (value & irq_data->enable)
+ handle_nested_irq(chip->irq_base + i);
}
- return 0;
-out:
- dev_err(chip->dev, "Wrong irq #%d is assigned\n", irq);
- return -EINVAL;
+ return IRQ_HANDLED;
}
-static int __check_irq(int irq)
+static irqreturn_t max8925_tsc_irq(int irq, void *data)
{
- if ((irq < 0) || (irq >= MAX8925_NUM_IRQ))
- return -EINVAL;
- return 0;
+ struct max8925_chip *chip = data;
+ struct max8925_irq_data *irq_data;
+ struct i2c_client *i2c;
+ int read_reg = -1, value = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
+ irq_data = &max8925_irqs[i];
+ /* non TSC IRQ should be serviced in max8925_irq() */
+ if (!irq_data->tsc_irq)
+ continue;
+ if (irq_data->flags == FLAGS_RTC)
+ i2c = chip->rtc;
+ else if (irq_data->flags == FLAGS_ADC)
+ i2c = chip->adc;
+ else
+ i2c = chip->i2c;
+ if (read_reg != irq_data->reg) {
+ read_reg = irq_data->reg;
+ value = max8925_reg_read(i2c, irq_data->reg);
+ }
+ if (value & irq_data->enable)
+ handle_nested_irq(chip->irq_base + i);
+ }
+ return IRQ_HANDLED;
}
-int max8925_mask_irq(struct max8925_chip *chip, int irq)
+static void max8925_irq_lock(unsigned int irq)
{
- int offset, bit, ret;
+ struct max8925_chip *chip = get_irq_chip_data(irq);
- ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
- if (ret < 0)
- return ret;
- ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 1 << bit);
- return ret;
+ mutex_lock(&chip->irq_lock);
}
-int max8925_unmask_irq(struct max8925_chip *chip, int irq)
+static void max8925_irq_sync_unlock(unsigned int irq)
{
- int offset, bit, ret;
+ struct max8925_chip *chip = get_irq_chip_data(irq);
+ struct max8925_irq_data *irq_data;
+ static unsigned char cache_chg[2] = {0xff, 0xff};
+ static unsigned char cache_on[2] = {0xff, 0xff};
+ static unsigned char cache_rtc = 0xff, cache_tsc = 0xff;
+ unsigned char irq_chg[2], irq_on[2];
+ unsigned char irq_rtc, irq_tsc;
+ int i;
+
+ /* Load cached value. In initial, all IRQs are masked */
+ irq_chg[0] = cache_chg[0];
+ irq_chg[1] = cache_chg[1];
+ irq_on[0] = cache_on[0];
+ irq_on[1] = cache_on[1];
+ irq_rtc = cache_rtc;
+ irq_tsc = cache_tsc;
+ for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
+ irq_data = &max8925_irqs[i];
+ switch (irq_data->mask_reg) {
+ case MAX8925_CHG_IRQ1_MASK:
+ irq_chg[0] &= irq_data->enable;
+ break;
+ case MAX8925_CHG_IRQ2_MASK:
+ irq_chg[1] &= irq_data->enable;
+ break;
+ case MAX8925_ON_OFF_IRQ1_MASK:
+ irq_on[0] &= irq_data->enable;
+ break;
+ case MAX8925_ON_OFF_IRQ2_MASK:
+ irq_on[1] &= irq_data->enable;
+ break;
+ case MAX8925_RTC_IRQ_MASK:
+ irq_rtc &= irq_data->enable;
+ break;
+ case MAX8925_TSC_IRQ_MASK:
+ irq_tsc &= irq_data->enable;
+ break;
+ default:
+ dev_err(chip->dev, "wrong IRQ\n");
+ break;
+ }
+ }
+ /* update mask into registers */
+ if (cache_chg[0] != irq_chg[0]) {
+ cache_chg[0] = irq_chg[0];
+ max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK,
+ irq_chg[0]);
+ }
+ if (cache_chg[1] != irq_chg[1]) {
+ cache_chg[1] = irq_chg[1];
+ max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK,
+ irq_chg[1]);
+ }
+ if (cache_on[0] != irq_on[0]) {
+ cache_on[0] = irq_on[0];
+ max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK,
+ irq_on[0]);
+ }
+ if (cache_on[1] != irq_on[1]) {
+ cache_on[1] = irq_on[1];
+ max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK,
+ irq_on[1]);
+ }
+ if (cache_rtc != irq_rtc) {
+ cache_rtc = irq_rtc;
+ max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, irq_rtc);
+ }
+ if (cache_tsc != irq_tsc) {
+ cache_tsc = irq_tsc;
+ max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, irq_tsc);
+ }
- ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
- if (ret < 0)
- return ret;
- ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 0);
- return ret;
+ mutex_unlock(&chip->irq_lock);
}
-#define INT_STATUS_NUM (MAX8925_NUM_IRQ / BITS_PER_BYTE)
-
-static irqreturn_t max8925_irq_thread(int irq, void *data)
+static void max8925_irq_enable(unsigned int irq)
{
- struct max8925_chip *chip = data;
- unsigned long irq_status[INT_STATUS_NUM];
- unsigned char status_buf[INT_STATUS_NUM << 1];
- int i, ret;
-
- memset(irq_status, 0, sizeof(unsigned long) * INT_STATUS_NUM);
-
- /* all these interrupt status registers are read-only */
- switch (chip->chip_id) {
- case MAX8925_GPM:
- ret = max8925_bulk_read(chip->i2c, MAX8925_CHG_IRQ1,
- 4, status_buf);
- if (ret < 0)
- goto out;
- ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ1,
- 2, &status_buf[4]);
- if (ret < 0)
- goto out;
- ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ2,
- 2, &status_buf[6]);
- if (ret < 0)
- goto out;
- /* clear masked interrupt status */
- status_buf[0] &= (~status_buf[2] & CHG_IRQ1_MASK);
- irq_status[0] |= status_buf[0];
- status_buf[1] &= (~status_buf[3] & CHG_IRQ2_MASK);
- irq_status[0] |= (status_buf[1] << BITS_PER_BYTE);
- status_buf[4] &= (~status_buf[5] & ON_OFF_IRQ1_MASK);
- irq_status[0] |= (status_buf[4] << (BITS_PER_BYTE * 2));
- status_buf[6] &= (~status_buf[7] & ON_OFF_IRQ2_MASK);
- irq_status[0] |= (status_buf[6] << (BITS_PER_BYTE * 3));
- break;
- case MAX8925_ADC:
- ret = max8925_bulk_read(chip->i2c, MAX8925_TSC_IRQ,
- 2, status_buf);
- if (ret < 0)
- goto out;
- /* clear masked interrupt status */
- status_buf[0] &= (~status_buf[1] & TSC_IRQ_MASK);
- irq_status[0] |= status_buf[0];
- break;
- default:
- goto out;
- }
-
- for_each_bit(i, &irq_status[0], MAX8925_NUM_IRQ) {
- clear_bit(i, irq_status);
- dev_dbg(chip->dev, "Servicing IRQ #%d in %s\n", i, chip->name);
-
- mutex_lock(&chip->irq_lock);
- if (chip->irq[i].handler)
- chip->irq[i].handler(i, chip->irq[i].data);
- else {
- max8925_mask_irq(chip, i);
- dev_err(chip->dev, "Noboday cares IRQ #%d in %s. "
- "Now mask it.\n", i, chip->name);
- }
- mutex_unlock(&chip->irq_lock);
- }
-out:
- return IRQ_HANDLED;
+ struct max8925_chip *chip = get_irq_chip_data(irq);
+ max8925_irqs[irq - chip->irq_base].enable
+ = max8925_irqs[irq - chip->irq_base].offs;
}
-int max8925_request_irq(struct max8925_chip *chip, int irq,
- irq_handler_t handler, void *data)
+static void max8925_irq_disable(unsigned int irq)
{
- if ((__check_irq(irq) < 0) || !handler)
- return -EINVAL;
-
- mutex_lock(&chip->irq_lock);
- chip->irq[irq].handler = handler;
- chip->irq[irq].data = data;
- mutex_unlock(&chip->irq_lock);
- return 0;
+ struct max8925_chip *chip = get_irq_chip_data(irq);
+ max8925_irqs[irq - chip->irq_base].enable = 0;
}
-EXPORT_SYMBOL(max8925_request_irq);
-int max8925_free_irq(struct max8925_chip *chip, int irq)
+static struct irq_chip max8925_irq_chip = {
+ .name = "max8925",
+ .bus_lock = max8925_irq_lock,
+ .bus_sync_unlock = max8925_irq_sync_unlock,
+ .enable = max8925_irq_enable,
+ .disable = max8925_irq_disable,
+};
+
+static int max8925_irq_init(struct max8925_chip *chip, int irq,
+ struct max8925_platform_data *pdata)
{
- if (__check_irq(irq) < 0)
+ unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
+ struct irq_desc *desc;
+ int i, ret;
+ int __irq;
+
+ if (!pdata || !pdata->irq_base) {
+ dev_warn(chip->dev, "No interrupt support on IRQ base\n");
return -EINVAL;
+ }
+ /* clear all interrupts */
+ max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ1);
+ max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ2);
+ max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ1);
+ max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ2);
+ max8925_reg_read(chip->rtc, MAX8925_RTC_IRQ);
+ max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
+ /* mask all interrupts */
+ max8925_reg_write(chip->rtc, MAX8925_ALARM0_CNTL, 0);
+ max8925_reg_write(chip->rtc, MAX8925_ALARM1_CNTL, 0);
+ max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 0xff);
+ max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 0xff);
+ max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff);
+ max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 0xff);
+ max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, 0xff);
+ max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, 0xff);
+
+ mutex_init(&chip->irq_lock);
+ chip->core_irq = irq;
+ chip->irq_base = pdata->irq_base;
+ desc = irq_to_desc(chip->core_irq);
+
+ /* register with genirq */
+ for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
+ __irq = i + chip->irq_base;
+ set_irq_chip_data(__irq, chip);
+ set_irq_chip_and_handler(__irq, &max8925_irq_chip,
+ handle_edge_irq);
+ set_irq_nested_thread(__irq, 1);
+#ifdef CONFIG_ARM
+ set_irq_flags(__irq, IRQF_VALID);
+#else
+ set_irq_noprobe(__irq);
+#endif
+ }
+ if (!irq) {
+ dev_warn(chip->dev, "No interrupt support on core IRQ\n");
+ goto tsc_irq;
+ }
- mutex_lock(&chip->irq_lock);
- chip->irq[irq].handler = NULL;
- chip->irq[irq].data = NULL;
- mutex_unlock(&chip->irq_lock);
+ ret = request_threaded_irq(irq, NULL, max8925_irq, flags,
+ "max8925", chip);
+ if (ret) {
+ dev_err(chip->dev, "Failed to request core IRQ: %d\n", ret);
+ chip->core_irq = 0;
+ }
+tsc_irq:
+ if (!pdata->tsc_irq) {
+ dev_warn(chip->dev, "No interrupt support on TSC IRQ\n");
+ return 0;
+ }
+ chip->tsc_irq = pdata->tsc_irq;
+
+ ret = request_threaded_irq(chip->tsc_irq, NULL, max8925_tsc_irq,
+ flags, "max8925-tsc", chip);
+ if (ret) {
+ dev_err(chip->dev, "Failed to request TSC IRQ: %d\n", ret);
+ chip->tsc_irq = 0;
+ }
return 0;
}
-EXPORT_SYMBOL(max8925_free_irq);
-static int __devinit device_gpm_init(struct max8925_chip *chip,
- struct i2c_client *i2c,
- struct max8925_platform_data *pdata)
+int __devinit max8925_device_init(struct max8925_chip *chip,
+ struct max8925_platform_data *pdata)
{
int ret;
- /* mask all IRQs */
- ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ1_MASK, 0x7, 0x7);
- if (ret < 0)
- goto out;
- ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ2_MASK, 0xff, 0xff);
- if (ret < 0)
- goto out;
- ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff, 0xff);
- if (ret < 0)
- goto out;
- ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ2_MASK, 0x3, 0x3);
- if (ret < 0)
- goto out;
-
- chip->name = "GPM";
- memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
- ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
- IRQF_ONESHOT | IRQF_TRIGGER_LOW,
- "max8925-gpm", chip);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
- goto out;
+ max8925_irq_init(chip, chip->i2c->irq, pdata);
+
+ if (pdata && (pdata->power || pdata->touch)) {
+ /* enable ADC to control internal reference */
+ max8925_set_bits(chip->i2c, MAX8925_RESET_CNFG, 1, 1);
+ /* enable internal reference for ADC */
+ max8925_set_bits(chip->adc, MAX8925_TSC_CNFG1, 3, 2);
+ /* check for internal reference IRQ */
+ do {
+ ret = max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
+ } while (ret & MAX8925_NREF_OK);
+ /* enaable ADC scheduler, interval is 1 second */
+ max8925_set_bits(chip->adc, MAX8925_ADC_SCHED, 3, 2);
}
- chip->chip_irq = i2c->irq;
- /* enable hard-reset for ONKEY power-off */
- max8925_set_bits(i2c, MAX8925_SYSENSEL, 0x80, 0x80);
+ /* enable Momentary Power Loss */
+ max8925_set_bits(chip->rtc, MAX8925_MPL_CNTL, 1 << 4, 1 << 4);
- ret = mfd_add_devices(chip->dev, 0, ®ulator_devs[0],
- ARRAY_SIZE(regulator_devs),
- ®ulator_resources[0], 0);
+ ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
+ ARRAY_SIZE(rtc_devs),
+ &rtc_resources[0], 0);
if (ret < 0) {
- dev_err(chip->dev, "Failed to add regulator subdev\n");
- goto out_irq;
+ dev_err(chip->dev, "Failed to add rtc subdev\n");
+ goto out;
+ }
+ if (pdata && pdata->regulator[0]) {
+ ret = mfd_add_devices(chip->dev, 0, ®ulator_devs[0],
+ ARRAY_SIZE(regulator_devs),
+ ®ulator_resources[0], 0);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to add regulator subdev\n");
+ goto out_dev;
+ }
}
if (pdata && pdata->backlight) {
goto out_dev;
}
}
- return 0;
-out_dev:
- mfd_remove_devices(chip->dev);
-out_irq:
- if (chip->chip_irq)
- free_irq(chip->chip_irq, chip);
-out:
- return ret;
-}
-
-static int __devinit device_adc_init(struct max8925_chip *chip,
- struct i2c_client *i2c,
- struct max8925_platform_data *pdata)
-{
- int ret;
-
- /* mask all IRQs */
- ret = max8925_set_bits(i2c, MAX8925_TSC_IRQ_MASK, 3, 3);
- chip->name = "ADC";
- memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
- ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
- IRQF_ONESHOT | IRQF_TRIGGER_LOW,
- "max8925-adc", chip);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
- goto out;
+ if (pdata && pdata->power) {
+ ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
+ ARRAY_SIZE(power_devs),
+ &power_supply_resources[0], 0);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to add power supply "
+ "subdev\n");
+ goto out_dev;
+ }
}
- chip->chip_irq = i2c->irq;
if (pdata && pdata->touch) {
ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
&touch_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add touch subdev\n");
- goto out_irq;
+ goto out_dev;
}
}
+
return 0;
-out_irq:
- if (chip->chip_irq)
- free_irq(chip->chip_irq, chip);
+out_dev:
+ mfd_remove_devices(chip->dev);
out:
return ret;
}
-int __devinit max8925_device_init(struct max8925_chip *chip,
- struct max8925_platform_data *pdata)
+void __devexit max8925_device_exit(struct max8925_chip *chip)
{
- switch (chip->chip_id) {
- case MAX8925_GPM:
- device_gpm_init(chip, chip->i2c, pdata);
- break;
- case MAX8925_ADC:
- device_adc_init(chip, chip->i2c, pdata);
- break;
- }
- return 0;
-}
-
-void max8925_device_exit(struct max8925_chip *chip)
-{
- if (chip->chip_irq >= 0)
- free_irq(chip->chip_irq, chip);
+ if (chip->core_irq)
+ free_irq(chip->core_irq, chip);
+ if (chip->tsc_irq)
+ free_irq(chip->tsc_irq, chip);
mfd_remove_devices(chip->dev);
}
+
MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com");
MODULE_LICENSE("GPL");
#ifndef __LINUX_MFD_MAX8925_H
#define __LINUX_MFD_MAX8925_H
+#include <linux/mutex.h>
#include <linux/interrupt.h>
/* Unified sub device IDs for MAX8925 */
MAX8925_ID_LDO18,
MAX8925_ID_LDO19,
MAX8925_ID_LDO20,
+ MAX8925_ID_MAX,
+};
+
+enum {
+ /*
+ * Charging current threshold trigger going from fast charge
+ * to TOPOFF charge. From 5% to 20% of fasting charging current.
+ */
+ MAX8925_TOPOFF_THR_5PER,
+ MAX8925_TOPOFF_THR_10PER,
+ MAX8925_TOPOFF_THR_15PER,
+ MAX8925_TOPOFF_THR_20PER,
+};
+
+enum {
+ /* Fast charging current */
+ MAX8925_FCHG_85MA,
+ MAX8925_FCHG_300MA,
+ MAX8925_FCHG_460MA,
+ MAX8925_FCHG_600MA,
+ MAX8925_FCHG_700MA,
+ MAX8925_FCHG_800MA,
+ MAX8925_FCHG_900MA,
+ MAX8925_FCHG_1000MA,
};
/* Charger registers */
#define MAX8925_CHG_IRQ2 (0x7f)
#define MAX8925_CHG_IRQ1_MASK (0x80)
#define MAX8925_CHG_IRQ2_MASK (0x81)
+#define MAX8925_CHG_STATUS (0x82)
/* GPM registers */
#define MAX8925_SYSENSEL (0x00)
#define MAX8925_ON_OFF_IRQ1 (0x01)
#define MAX8925_ON_OFF_IRQ1_MASK (0x02)
-#define MAX8925_ON_OFF_STAT (0x03)
+#define MAX8925_ON_OFF_STATUS (0x03)
#define MAX8925_ON_OFF_IRQ2 (0x0d)
#define MAX8925_ON_OFF_IRQ2_MASK (0x0e)
#define MAX8925_RESET_CNFG (0x0f)
/* Touch registers */
#define MAX8925_TSC_IRQ (0x00)
#define MAX8925_TSC_IRQ_MASK (0x01)
+#define MAX8925_TSC_CNFG1 (0x02)
+#define MAX8925_ADC_SCHED (0x10)
#define MAX8925_ADC_RES_END (0x6f)
+#define MAX8925_NREF_OK (1 << 4)
+
/* RTC registers */
-#define MAX8925_RTC_STATUS (0x1a)
+#define MAX8925_ALARM0_CNTL (0x18)
+#define MAX8925_ALARM1_CNTL (0x19)
#define MAX8925_RTC_IRQ (0x1c)
#define MAX8925_RTC_IRQ_MASK (0x1d)
+#define MAX8925_MPL_CNTL (0x1e)
/* WLED registers */
#define MAX8925_WLED_MODE_CNTL (0x84)
#define TSC_IRQ_MASK (0x03)
#define RTC_IRQ_MASK (0x0c)
-#define MAX8925_NUM_IRQ (32)
+#define MAX8925_GPM_NUM_IRQ (40)
+#define MAX8925_ADC_NUM_IRQ (8)
+#define MAX8925_NUM_IRQ (MAX8925_GPM_NUM_IRQ \
+ + MAX8925_ADC_NUM_IRQ)
+
+#define MAX8925_MAX_REGULATOR (23)
#define MAX8925_NAME_SIZE (32)
+/* IRQ definitions */
enum {
- MAX8925_INVALID = 0,
- MAX8925_RTC,
- MAX8925_ADC,
- MAX8925_GPM, /* general power management */
- MAX8925_MAX,
+ MAX8925_IRQ_VCHG_DC_OVP,
+ MAX8925_IRQ_VCHG_DC_F,
+ MAX8925_IRQ_VCHG_DC_R,
+ MAX8925_IRQ_VCHG_USB_OVP,
+ MAX8925_IRQ_VCHG_USB_F,
+ MAX8925_IRQ_VCHG_USB_R,
+ MAX8925_IRQ_VCHG_THM_OK_R,
+ MAX8925_IRQ_VCHG_THM_OK_F,
+ MAX8925_IRQ_VCHG_SYSLOW_F,
+ MAX8925_IRQ_VCHG_SYSLOW_R,
+ MAX8925_IRQ_VCHG_RST,
+ MAX8925_IRQ_VCHG_DONE,
+ MAX8925_IRQ_VCHG_TOPOFF,
+ MAX8925_IRQ_VCHG_TMR_FAULT,
+ MAX8925_IRQ_GPM_RSTIN,
+ MAX8925_IRQ_GPM_MPL,
+ MAX8925_IRQ_GPM_SW_3SEC,
+ MAX8925_IRQ_GPM_EXTON_F,
+ MAX8925_IRQ_GPM_EXTON_R,
+ MAX8925_IRQ_GPM_SW_1SEC,
+ MAX8925_IRQ_GPM_SW_F,
+ MAX8925_IRQ_GPM_SW_R,
+ MAX8925_IRQ_GPM_SYSCKEN_F,
+ MAX8925_IRQ_GPM_SYSCKEN_R,
+ MAX8925_IRQ_RTC_ALARM1,
+ MAX8925_IRQ_RTC_ALARM0,
+ MAX8925_IRQ_TSC_STICK,
+ MAX8925_IRQ_TSC_NSTICK,
+ MAX8925_NR_IRQS,
};
-#define MAX8925_IRQ_VCHG_OVP (0)
-#define MAX8925_IRQ_VCHG_F (1)
-#define MAX8925_IRQ_VCHG_R (2)
-#define MAX8925_IRQ_VCHG_THM_OK_R (8)
-#define MAX8925_IRQ_VCHG_THM_OK_F (9)
-#define MAX8925_IRQ_VCHG_BATTLOW_F (10)
-#define MAX8925_IRQ_VCHG_BATTLOW_R (11)
-#define MAX8925_IRQ_VCHG_RST (12)
-#define MAX8925_IRQ_VCHG_DONE (13)
-#define MAX8925_IRQ_VCHG_TOPOFF (14)
-#define MAX8925_IRQ_VCHG_TMR_FAULT (15)
-#define MAX8925_IRQ_GPM_RSTIN (16)
-#define MAX8925_IRQ_GPM_MPL (17)
-#define MAX8925_IRQ_GPM_SW_3SEC (18)
-#define MAX8925_IRQ_GPM_EXTON_F (19)
-#define MAX8925_IRQ_GPM_EXTON_R (20)
-#define MAX8925_IRQ_GPM_SW_1SEC (21)
-#define MAX8925_IRQ_GPM_SW_F (22)
-#define MAX8925_IRQ_GPM_SW_R (23)
-#define MAX8925_IRQ_GPM_SYSCKEN_F (24)
-#define MAX8925_IRQ_GPM_SYSCKEN_R (25)
-
-#define MAX8925_IRQ_TSC_STICK (0)
-#define MAX8925_IRQ_TSC_NSTICK (1)
-
-#define MAX8925_MAX_REGULATOR (23)
-
struct max8925_irq {
irq_handler_t handler;
void *data;
struct max8925_chip {
struct device *dev;
+ struct i2c_client *i2c;
+ struct i2c_client *adc;
+ struct i2c_client *rtc;
+ struct max8925_irq irqs[MAX8925_NUM_IRQ];
struct mutex io_lock;
struct mutex irq_lock;
- struct i2c_client *i2c;
- struct max8925_irq irq[MAX8925_NUM_IRQ];
- const char *name;
- int chip_id;
- int chip_irq;
+ int irq_base;
+ int core_irq;
+ int tsc_irq;
};
struct max8925_backlight_pdata {
unsigned int flags;
};
+struct max8925_power_pdata {
+ int (*set_charger)(int);
+ unsigned batt_detect:1;
+ unsigned topoff_threshold:2;
+ unsigned fast_charge:3; /* charge current */
+};
+
+/*
+ * irq_base: stores IRQ base number of MAX8925 in platform
+ * tsc_irq: stores IRQ number of MAX8925 TSC
+ */
struct max8925_platform_data {
struct max8925_backlight_pdata *backlight;
struct max8925_touch_pdata *touch;
+ struct max8925_power_pdata *power;
struct regulator_init_data *regulator[MAX8925_MAX_REGULATOR];
- int chip_id;
- int chip_irq;
+ int irq_base;
+ int tsc_irq;
};
extern int max8925_reg_read(struct i2c_client *, int);
extern int max8925_set_bits(struct i2c_client *, int, unsigned char,
unsigned char);
+extern int max8925_request_irq(struct max8925_chip *, int,
+ irq_handler_t, void *);
+extern int max8925_free_irq(struct max8925_chip *, int);
+extern int max8925_mask_irq(struct max8925_chip *, int);
+extern int max8925_unmask_irq(struct max8925_chip *, int);
+
extern int max8925_device_init(struct max8925_chip *,
struct max8925_platform_data *);
extern void max8925_device_exit(struct max8925_chip *);
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