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alistair23-linux/drivers/mfd/mc13xxx-core.c
Linus Torvalds 4b78147468 MFD changes for 3.5 
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Merge tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6

Pull MFD changes from Samuel Ortiz:
 "Besides the usual cleanups, this one brings:

   * Support for 5 new chipsets: Intel's ICH LPC and SCH Centerton,
     ST-E's STAX211, Samsung's MAX77693 and TI's LM3533.

   * Device tree support for the twl6040, tps65910, da9502 and ab8500
     drivers.

   * Fairly big tps56910, ab8500 and db8500 updates.

   * i2c support for mc13xxx.

   * Our regular update for the wm8xxx driver from Mark."

Fix up various conflicts with other trees, largely due to ab5500 removal
etc.

* tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (106 commits)
  mfd: Fix build break of max77693 by adding REGMAP_I2C option
  mfd: Fix twl6040 build failure
  mfd: Fix max77693 build failure
  mfd: ab8500-core should depend on MFD_DB8500_PRCMU
  gpio: tps65910: dt: process gpio specific device node info
  mfd: Remove the parsing of dt info for tps65910 gpio
  mfd: Save device node parsed platform data for tps65910 sub devices
  mfd: Add r_select to lm3533 platform data
  gpio: Add Intel Centerton support to gpio-sch
  mfd: Emulate active low IRQs as well as active high IRQs for wm831x
  mfd: Mark two lm3533 zone registers as volatile
  mfd: Fix return type of lm533 attribute is_visible
  mfd: Enable Device Tree support in the ab8500-pwm driver
  mfd: Enable Device Tree support in the ab8500-sysctrl driver
  mfd: Add support for Device Tree to twl6040
  mfd: Register the twl6040 child for the ASoC codec unconditionally
  mfd: Allocate twl6040 IRQ numbers dynamically
  mfd: twl6040 code cleanup in interrupt initialization part
  mfd: Enable ab8500-gpadc driver for Device Tree
  mfd: Prevent unassigned pointer from being used in ab8500-gpadc driver
  ...
2012-05-29 11:53:11 -07:00

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/*
* 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 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;
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
if (offset > MC13XXX_NUMREGS)
return -EINVAL;
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)
{
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
if (offset > MC13XXX_NUMREGS || val > 0xffffff)
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(!mutex_is_locked(&mc13xxx->lock));
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);
}
static const char *mc13xxx_chipname[] = {
[MC13XXX_ID_MC13783] = "mc13783",
[MC13XXX_ID_MC13892] = "mc13892",
};
#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
static int mc13xxx_identify(struct mc13xxx *mc13xxx)
{
u32 icid;
u32 revision;
int ret;
/*
* Get the generation ID from register 46, as apparently some older
* IC revisions only have this info at this location. Newer ICs seem to
* have both.
*/
ret = mc13xxx_reg_read(mc13xxx, 46, &icid);
if (ret)
return ret;
icid = (icid >> 6) & 0x7;
switch (icid) {
case 2:
mc13xxx->ictype = MC13XXX_ID_MC13783;
break;
case 7:
mc13xxx->ictype = MC13XXX_ID_MC13892;
break;
default:
mc13xxx->ictype = MC13XXX_ID_INVALID;
break;
}
if (mc13xxx->ictype == MC13XXX_ID_MC13783 ||
mc13xxx->ictype == MC13XXX_ID_MC13892) {
ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
"fin: %d, fab: %d, icid: %d/%d\n",
mc13xxx_chipname[mc13xxx->ictype],
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));
}
return (mc13xxx->ictype == MC13XXX_ID_INVALID) ? -ENODEV : 0;
}
static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
{
return mc13xxx_chipname[mc13xxx->ictype];
}
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);
}
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 mc13xxx *mc13xxx,
struct mc13xxx_platform_data *pdata, int irq)
{
int ret;
mc13xxx_lock(mc13xxx);
ret = mc13xxx_identify(mc13xxx);
if (ret)
goto err_revision;
/* mask all irqs */
ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
if (ret)
goto err_mask;
ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff);
if (ret)
goto err_mask;
ret = request_threaded_irq(irq, NULL, mc13xxx_irq_thread,
IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
if (ret) {
err_mask:
err_revision:
mc13xxx_unlock(mc13xxx);
kfree(mc13xxx);
return ret;
}
mc13xxx->irq = irq;
mc13xxx_unlock(mc13xxx);
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_CODEC)
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
pdata->codec, sizeof(*pdata->codec));
if (mc13xxx->flags & MC13XXX_USE_RTC)
mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts",
&pdata->touch, sizeof(pdata->touch));
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));
} else {
mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
mc13xxx_add_subdevice(mc13xxx, "%s-led");
mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
}
return 0;
}
EXPORT_SYMBOL_GPL(mc13xxx_common_init);
void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
{
free_irq(mc13xxx->irq, mc13xxx);
mfd_remove_devices(mc13xxx->dev);
regmap_exit(mc13xxx->regmap);
kfree(mc13xxx);
}
EXPORT_SYMBOL_GPL(mc13xxx_common_cleanup);
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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