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linux/drivers/mfd/mc13xxx-core.c
Alexander Shiyan a2ff8459f1 mfd: mc13xxx: Do not use platform data with devicetree 
This patch removes platform data usage for codec and touchscreen
when driver is used with devicetree.
This fixes possible "null pointer dereference" error if DTS uses
"fsl,mc13xxx-uses-codec" or "fsl,mc13xxx-uses-touch" options.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-06-03 08:11:29 +01:00

721 lines
19 KiB
C
Raw Blame History

/*
* Copyright 2009-2010 Pengutronix
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
*
* loosely based on an earlier driver that has
* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* 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.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mc13xxx.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include "mc13xxx.h"
#define MC13XXX_IRQSTAT0 0
#define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0)
#define MC13XXX_IRQSTAT0_ADCBISDONEI (1 << 1)
#define MC13XXX_IRQSTAT0_TSI (1 << 2)
#define MC13783_IRQSTAT0_WHIGHI (1 << 3)
#define MC13783_IRQSTAT0_WLOWI (1 << 4)
#define MC13XXX_IRQSTAT0_CHGDETI (1 << 6)
#define MC13783_IRQSTAT0_CHGOVI (1 << 7)
#define MC13XXX_IRQSTAT0_CHGREVI (1 << 8)
#define MC13XXX_IRQSTAT0_CHGSHORTI (1 << 9)
#define MC13XXX_IRQSTAT0_CCCVI (1 << 10)
#define MC13XXX_IRQSTAT0_CHGCURRI (1 << 11)
#define MC13XXX_IRQSTAT0_BPONI (1 << 12)
#define MC13XXX_IRQSTAT0_LOBATLI (1 << 13)
#define MC13XXX_IRQSTAT0_LOBATHI (1 << 14)
#define MC13783_IRQSTAT0_UDPI (1 << 15)
#define MC13783_IRQSTAT0_USBI (1 << 16)
#define MC13783_IRQSTAT0_IDI (1 << 19)
#define MC13783_IRQSTAT0_SE1I (1 << 21)
#define MC13783_IRQSTAT0_CKDETI (1 << 22)
#define MC13783_IRQSTAT0_UDMI (1 << 23)
#define MC13XXX_IRQMASK0 1
#define MC13XXX_IRQMASK0_ADCDONEM MC13XXX_IRQSTAT0_ADCDONEI
#define MC13XXX_IRQMASK0_ADCBISDONEM MC13XXX_IRQSTAT0_ADCBISDONEI
#define MC13XXX_IRQMASK0_TSM MC13XXX_IRQSTAT0_TSI
#define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI
#define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI
#define MC13XXX_IRQMASK0_CHGDETM MC13XXX_IRQSTAT0_CHGDETI
#define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI
#define MC13XXX_IRQMASK0_CHGREVM MC13XXX_IRQSTAT0_CHGREVI
#define MC13XXX_IRQMASK0_CHGSHORTM MC13XXX_IRQSTAT0_CHGSHORTI
#define MC13XXX_IRQMASK0_CCCVM MC13XXX_IRQSTAT0_CCCVI
#define MC13XXX_IRQMASK0_CHGCURRM MC13XXX_IRQSTAT0_CHGCURRI
#define MC13XXX_IRQMASK0_BPONM MC13XXX_IRQSTAT0_BPONI
#define MC13XXX_IRQMASK0_LOBATLM MC13XXX_IRQSTAT0_LOBATLI
#define MC13XXX_IRQMASK0_LOBATHM MC13XXX_IRQSTAT0_LOBATHI
#define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI
#define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI
#define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI
#define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I
#define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI
#define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI
#define MC13XXX_IRQSTAT1 3
#define MC13XXX_IRQSTAT1_1HZI (1 << 0)
#define MC13XXX_IRQSTAT1_TODAI (1 << 1)
#define MC13783_IRQSTAT1_ONOFD1I (1 << 3)
#define MC13783_IRQSTAT1_ONOFD2I (1 << 4)
#define MC13783_IRQSTAT1_ONOFD3I (1 << 5)
#define MC13XXX_IRQSTAT1_SYSRSTI (1 << 6)
#define MC13XXX_IRQSTAT1_RTCRSTI (1 << 7)
#define MC13XXX_IRQSTAT1_PCI (1 << 8)
#define MC13XXX_IRQSTAT1_WARMI (1 << 9)
#define MC13XXX_IRQSTAT1_MEMHLDI (1 << 10)
#define MC13783_IRQSTAT1_PWRRDYI (1 << 11)
#define MC13XXX_IRQSTAT1_THWARNLI (1 << 12)
#define MC13XXX_IRQSTAT1_THWARNHI (1 << 13)
#define MC13XXX_IRQSTAT1_CLKI (1 << 14)
#define MC13783_IRQSTAT1_SEMAFI (1 << 15)
#define MC13783_IRQSTAT1_MC2BI (1 << 17)
#define MC13783_IRQSTAT1_HSDETI (1 << 18)
#define MC13783_IRQSTAT1_HSLI (1 << 19)
#define MC13783_IRQSTAT1_ALSPTHI (1 << 20)
#define MC13783_IRQSTAT1_AHSSHORTI (1 << 21)
#define MC13XXX_IRQMASK1 4
#define MC13XXX_IRQMASK1_1HZM MC13XXX_IRQSTAT1_1HZI
#define MC13XXX_IRQMASK1_TODAM MC13XXX_IRQSTAT1_TODAI
#define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I
#define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I
#define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I
#define MC13XXX_IRQMASK1_SYSRSTM MC13XXX_IRQSTAT1_SYSRSTI
#define MC13XXX_IRQMASK1_RTCRSTM MC13XXX_IRQSTAT1_RTCRSTI
#define MC13XXX_IRQMASK1_PCM MC13XXX_IRQSTAT1_PCI
#define MC13XXX_IRQMASK1_WARMM MC13XXX_IRQSTAT1_WARMI
#define MC13XXX_IRQMASK1_MEMHLDM MC13XXX_IRQSTAT1_MEMHLDI
#define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI
#define MC13XXX_IRQMASK1_THWARNLM MC13XXX_IRQSTAT1_THWARNLI
#define MC13XXX_IRQMASK1_THWARNHM MC13XXX_IRQSTAT1_THWARNHI
#define MC13XXX_IRQMASK1_CLKM MC13XXX_IRQSTAT1_CLKI
#define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI
#define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI
#define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI
#define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI
#define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI
#define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI
#define MC13XXX_REVISION 7
#define MC13XXX_REVISION_REVMETAL (0x07 << 0)
#define MC13XXX_REVISION_REVFULL (0x03 << 3)
#define MC13XXX_REVISION_ICID (0x07 << 6)
#define MC13XXX_REVISION_FIN (0x03 << 9)
#define MC13XXX_REVISION_FAB (0x03 << 11)
#define MC13XXX_REVISION_ICIDCODE (0x3f << 13)
#define MC34708_REVISION_REVMETAL (0x07 << 0)
#define MC34708_REVISION_REVFULL (0x07 << 3)
#define MC34708_REVISION_FIN (0x07 << 6)
#define MC34708_REVISION_FAB (0x07 << 9)
#define MC13XXX_ADC1 44
#define MC13XXX_ADC1_ADEN (1 << 0)
#define MC13XXX_ADC1_RAND (1 << 1)
#define MC13XXX_ADC1_ADSEL (1 << 3)
#define MC13XXX_ADC1_ASC (1 << 20)
#define MC13XXX_ADC1_ADTRIGIGN (1 << 21)
#define MC13XXX_ADC2 45
void mc13xxx_lock(struct mc13xxx *mc13xxx)
{
if (!mutex_trylock(&mc13xxx->lock)) {
dev_dbg(mc13xxx->dev, "wait for %s from %pf\n",
__func__, __builtin_return_address(0));
mutex_lock(&mc13xxx->lock);
}
dev_dbg(mc13xxx->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
}
EXPORT_SYMBOL(mc13xxx_lock);
void mc13xxx_unlock(struct mc13xxx *mc13xxx)
{
dev_dbg(mc13xxx->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
mutex_unlock(&mc13xxx->lock);
}
EXPORT_SYMBOL(mc13xxx_unlock);
int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
{
int ret;
ret = regmap_read(mc13xxx->regmap, offset, val);
dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
return ret;
}
EXPORT_SYMBOL(mc13xxx_reg_read);
int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
{
dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
if (val >= BIT(24))
return -EINVAL;
return regmap_write(mc13xxx->regmap, offset, val);
}
EXPORT_SYMBOL(mc13xxx_reg_write);
int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
u32 mask, u32 val)
{
BUG_ON(val & ~mask);
dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n",
offset, val, mask);
return regmap_update_bits(mc13xxx->regmap, offset, mask, val);
}
EXPORT_SYMBOL(mc13xxx_reg_rmw);
int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
{
int ret;
unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
u32 mask;
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
if (mask & irqbit)
/* already masked */
return 0;
return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit);
}
EXPORT_SYMBOL(mc13xxx_irq_mask);
int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
{
int ret;
unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
u32 mask;
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
if (!(mask & irqbit))
/* already unmasked */
return 0;
return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit);
}
EXPORT_SYMBOL(mc13xxx_irq_unmask);
int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
int *enabled, int *pending)
{
int ret;
unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
if (enabled) {
u32 mask;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
*enabled = mask & irqbit;
}
if (pending) {
u32 stat;
ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
if (ret)
return ret;
*pending = stat & irqbit;
}
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_status);
int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq)
{
unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
unsigned int val = 1 << (irq < 24 ? irq : irq - 24);
BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ);
return mc13xxx_reg_write(mc13xxx, offstat, val);
}
EXPORT_SYMBOL(mc13xxx_irq_ack);
int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq,
irq_handler_t handler, const char *name, void *dev)
{
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
BUG_ON(!handler);
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
if (mc13xxx->irqhandler[irq])
return -EBUSY;
mc13xxx->irqhandler[irq] = handler;
mc13xxx->irqdata[irq] = dev;
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_request_nounmask);
int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
irq_handler_t handler, const char *name, void *dev)
{
int ret;
ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev);
if (ret)
return ret;
ret = mc13xxx_irq_unmask(mc13xxx, irq);
if (ret) {
mc13xxx->irqhandler[irq] = NULL;
mc13xxx->irqdata[irq] = NULL;
return ret;
}
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_request);
int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
{
int ret;
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] ||
mc13xxx->irqdata[irq] != dev)
return -EINVAL;
ret = mc13xxx_irq_mask(mc13xxx, irq);
if (ret)
return ret;
mc13xxx->irqhandler[irq] = NULL;
mc13xxx->irqdata[irq] = NULL;
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_free);
static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq)
{
return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]);
}
/*
* returns: number of handled irqs or negative error
* locking: holds mc13xxx->lock
*/
static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx,
unsigned int offstat, unsigned int offmask, int baseirq)
{
u32 stat, mask;
int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
int num_handled = 0;
if (ret)
return ret;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
while (stat & ~mask) {
int irq = __ffs(stat & ~mask);
stat &= ~(1 << irq);
if (likely(mc13xxx->irqhandler[baseirq + irq])) {
irqreturn_t handled;
handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq);
if (handled == IRQ_HANDLED)
num_handled++;
} else {
dev_err(mc13xxx->dev,
"BUG: irq %u but no handler\n",
baseirq + irq);
mask |= 1 << irq;
ret = mc13xxx_reg_write(mc13xxx, offmask, mask);
}
}
return num_handled;
}
static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
{
struct mc13xxx *mc13xxx = data;
irqreturn_t ret;
int handled = 0;
mc13xxx_lock(mc13xxx);
ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0,
MC13XXX_IRQMASK0, 0);
if (ret > 0)
handled = 1;
ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1,
MC13XXX_IRQMASK1, 24);
if (ret > 0)
handled = 1;
mc13xxx_unlock(mc13xxx);
return IRQ_RETVAL(handled);
}
#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
{
dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
"fin: %d, fab: %d, icid: %d/%d\n",
mc13xxx->variant->name,
maskval(revision, MC13XXX_REVISION_REVFULL),
maskval(revision, MC13XXX_REVISION_REVMETAL),
maskval(revision, MC13XXX_REVISION_FIN),
maskval(revision, MC13XXX_REVISION_FAB),
maskval(revision, MC13XXX_REVISION_ICID),
maskval(revision, MC13XXX_REVISION_ICIDCODE));
}
static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
{
dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n",
mc13xxx->variant->name,
maskval(revision, MC34708_REVISION_REVFULL),
maskval(revision, MC34708_REVISION_REVMETAL),
maskval(revision, MC34708_REVISION_FIN),
maskval(revision, MC34708_REVISION_FAB));
}
/* These are only exported for mc13xxx-i2c and mc13xxx-spi */
struct mc13xxx_variant mc13xxx_variant_mc13783 = {
.name = "mc13783",
.print_revision = mc13xxx_print_revision,
};
EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
struct mc13xxx_variant mc13xxx_variant_mc13892 = {
.name = "mc13892",
.print_revision = mc13xxx_print_revision,
};
EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
struct mc13xxx_variant mc13xxx_variant_mc34708 = {
.name = "mc34708",
.print_revision = mc34708_print_revision,
};
EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708);
static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
{
return mc13xxx->variant->name;
}
int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
{
return mc13xxx->flags;
}
EXPORT_SYMBOL(mc13xxx_get_flags);
#define MC13XXX_ADC1_CHAN0_SHIFT 5
#define MC13XXX_ADC1_CHAN1_SHIFT 8
#define MC13783_ADC1_ATO_SHIFT 11
#define MC13783_ADC1_ATOX (1 << 19)
struct mc13xxx_adcdone_data {
struct mc13xxx *mc13xxx;
struct completion done;
};
static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
{
struct mc13xxx_adcdone_data *adcdone_data = data;
mc13xxx_irq_ack(adcdone_data->mc13xxx, irq);
complete_all(&adcdone_data->done);
return IRQ_HANDLED;
}
#define MC13XXX_ADC_WORKING (1 << 0)
int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
unsigned int channel, u8 ato, bool atox,
unsigned int *sample)
{
u32 adc0, adc1, old_adc0;
int i, ret;
struct mc13xxx_adcdone_data adcdone_data = {
.mc13xxx = mc13xxx,
};
init_completion(&adcdone_data.done);
dev_dbg(mc13xxx->dev, "%s\n", __func__);
mc13xxx_lock(mc13xxx);
if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
ret = -EBUSY;
goto out;
}
mc13xxx->adcflags |= MC13XXX_ADC_WORKING;
mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);
adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2;
adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC;
if (channel > 7)
adc1 |= MC13XXX_ADC1_ADSEL;
switch (mode) {
case MC13XXX_ADC_MODE_TS:
adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 |
MC13XXX_ADC0_TSMOD1;
adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
break;
case MC13XXX_ADC_MODE_SINGLE_CHAN:
adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT;
adc1 |= MC13XXX_ADC1_RAND;
break;
case MC13XXX_ADC_MODE_MULT_CHAN:
adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
break;
default:
mc13xxx_unlock(mc13xxx);
return -EINVAL;
}
adc1 |= ato << MC13783_ADC1_ATO_SHIFT;
if (atox)
adc1 |= MC13783_ADC1_ATOX;
dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__);
mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
mc13xxx_handler_adcdone, __func__, &adcdone_data);
mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE);
mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);
mc13xxx_unlock(mc13xxx);
ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
if (!ret)
ret = -ETIMEDOUT;
mc13xxx_lock(mc13xxx);
mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data);
if (ret > 0)
for (i = 0; i < 4; ++i) {
ret = mc13xxx_reg_read(mc13xxx,
MC13XXX_ADC2, &sample[i]);
if (ret)
break;
}
if (mode == MC13XXX_ADC_MODE_TS)
/* restore TSMOD */
mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);
mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
out:
mc13xxx_unlock(mc13xxx);
return ret;
}
EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion);
static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
const char *format, void *pdata, size_t pdata_size)
{
char buf[30];
const char *name = mc13xxx_get_chipname(mc13xxx);
struct mfd_cell cell = {
.platform_data = pdata,
.pdata_size = pdata_size,
};
/* there is no asnprintf in the kernel :-( */
if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
return -E2BIG;
cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
if (!cell.name)
return -ENOMEM;
return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0, NULL);
}
static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
{
return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
}
#ifdef CONFIG_OF
static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
{
struct device_node *np = mc13xxx->dev->of_node;
if (!np)
return -ENODEV;
if (of_get_property(np, "fsl,mc13xxx-uses-adc", NULL))
mc13xxx->flags |= MC13XXX_USE_ADC;
if (of_get_property(np, "fsl,mc13xxx-uses-codec", NULL))
mc13xxx->flags |= MC13XXX_USE_CODEC;
if (of_get_property(np, "fsl,mc13xxx-uses-rtc", NULL))
mc13xxx->flags |= MC13XXX_USE_RTC;
if (of_get_property(np, "fsl,mc13xxx-uses-touch", NULL))
mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN;
return 0;
}
#else
static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
{
return -ENODEV;
}
#endif
int mc13xxx_common_init(struct device *dev)
{
struct mc13xxx_platform_data *pdata = dev_get_platdata(dev);
struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
int ret;
u32 revision;
mc13xxx->dev = dev;
ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
if (ret)
return ret;
mc13xxx->variant->print_revision(mc13xxx, revision);
/* mask all irqs */
ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
if (ret)
return ret;
ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff);
if (ret)
return ret;
mutex_init(&mc13xxx->lock);
ret = request_threaded_irq(mc13xxx->irq, NULL, mc13xxx_irq_thread,
IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
if (ret)
return ret;
if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
mc13xxx->flags = pdata->flags;
if (mc13xxx->flags & MC13XXX_USE_ADC)
mc13xxx_add_subdevice(mc13xxx, "%s-adc");
if (mc13xxx->flags & MC13XXX_USE_RTC)
mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
if (pdata) {
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
&pdata->regulators, sizeof(pdata->regulators));
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
pdata->leds, sizeof(*pdata->leds));
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
pdata->buttons, sizeof(*pdata->buttons));
if (mc13xxx->flags & MC13XXX_USE_CODEC)
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
pdata->codec, sizeof(*pdata->codec));
if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts",
&pdata->touch, sizeof(pdata->touch));
} else {
mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
mc13xxx_add_subdevice(mc13xxx, "%s-led");
mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
if (mc13xxx->flags & MC13XXX_USE_CODEC)
mc13xxx_add_subdevice(mc13xxx, "%s-codec");
if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
mc13xxx_add_subdevice(mc13xxx, "%s-ts");
}
return 0;
}
EXPORT_SYMBOL_GPL(mc13xxx_common_init);
int mc13xxx_common_exit(struct device *dev)
{
struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
free_irq(mc13xxx->irq, mc13xxx);
mfd_remove_devices(dev);
mutex_destroy(&mc13xxx->lock);
return 0;
}
EXPORT_SYMBOL_GPL(mc13xxx_common_exit);
MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
MODULE_LICENSE("GPL v2");
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