[PATCH 2/6] mfd/mc13xxx: provide a generic version of adc_do_conversion

From: Uwe Kleine-KÃnig
Date: Wed Aug 24 2011 - 09:29:35 EST

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This is needed to convert the touch driver away from using struct mc13783.

Note this patch drops MC13783_ADC0_ADREFMODE. This is unused and doesn't
exist on mc13892.

Signed-off-by: Uwe Kleine-KÃnig <u.kleine-koenig@xxxxxxxxxxxxxx>
---
drivers/mfd/mc13xxx-core.c | 89 +++++++++++++++++++++----------------------
include/linux/mfd/mc13783.h | 35 +++++++++--------
include/linux/mfd/mc13xxx.h | 19 +++++++++
3 files changed, 81 insertions(+), 62 deletions(-)

diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 7e4d44b..5ee5e64 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -26,12 +26,12 @@ struct mc13xxx {

irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
void *irqdata[MC13XXX_NUM_IRQ];
+
+ int adcflags;
};

struct mc13783 {
struct mc13xxx mc13xxx;
-
- int adcflags;
};

struct mc13xxx *mc13783_to_mc13xxx(struct mc13783 *mc13783)
@@ -136,14 +136,14 @@ EXPORT_SYMBOL(mc13783_to_mc13xxx);
#define MC13XXX_REVISION_FAB (0x03 << 11)
#define MC13XXX_REVISION_ICIDCODE (0x3f << 13)

-#define MC13783_ADC1 44
-#define MC13783_ADC1_ADEN (1 << 0)
-#define MC13783_ADC1_RAND (1 << 1)
-#define MC13783_ADC1_ADSEL (1 << 3)
-#define MC13783_ADC1_ASC (1 << 20)
-#define MC13783_ADC1_ADTRIGIGN (1 << 21)
+#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 MC13783_ADC2 45
+#define MC13XXX_ADC2 45

#define MC13XXX_NUMREGS 0x3f

@@ -569,15 +569,15 @@ int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
}
EXPORT_SYMBOL(mc13xxx_get_flags);

-#define MC13783_ADC1_CHAN0_SHIFT 5
-#define MC13783_ADC1_CHAN1_SHIFT 8
+#define MC13XXX_ADC1_CHAN0_SHIFT 5
+#define MC13XXX_ADC1_CHAN1_SHIFT 8

struct mc13xxx_adcdone_data {
struct mc13xxx *mc13xxx;
struct completion done;
};

-static irqreturn_t mc13783_handler_adcdone(int irq, void *data)
+static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
{
struct mc13xxx_adcdone_data *adcdone_data = data;

@@ -588,12 +588,11 @@ static irqreturn_t mc13783_handler_adcdone(int irq, void *data)
return IRQ_HANDLED;
}

-#define MC13783_ADC_WORKING (1 << 0)
+#define MC13XXX_ADC_WORKING (1 << 0)

-int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,
+int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
unsigned int channel, unsigned int *sample)
{
- struct mc13xxx *mc13xxx = &mc13783->mc13xxx;
u32 adc0, adc1, old_adc0;
int i, ret;
struct mc13xxx_adcdone_data adcdone_data = {
@@ -605,51 +604,51 @@ int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,

mc13xxx_lock(mc13xxx);

- if (mc13783->adcflags & MC13783_ADC_WORKING) {
+ if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
ret = -EBUSY;
goto out;
}

- mc13783->adcflags |= MC13783_ADC_WORKING;
+ mc13xxx->adcflags |= MC13XXX_ADC_WORKING;

- mc13xxx_reg_read(mc13xxx, MC13783_ADC0, &old_adc0);
+ mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);

- adc0 = MC13783_ADC0_ADINC1 | MC13783_ADC0_ADINC2;
- adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN | MC13783_ADC1_ASC;
+ adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2;
+ adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC;

if (channel > 7)
- adc1 |= MC13783_ADC1_ADSEL;
+ adc1 |= MC13XXX_ADC1_ADSEL;

switch (mode) {
- case MC13783_ADC_MODE_TS:
- adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_TSMOD0 |
- MC13783_ADC0_TSMOD1;
- adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
+ case MC13XXX_ADC_MODE_TS:
+ adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 |
+ MC13XXX_ADC0_TSMOD1;
+ adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
break;

- case MC13783_ADC_MODE_SINGLE_CHAN:
- adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
- adc1 |= (channel & 0x7) << MC13783_ADC1_CHAN0_SHIFT;
- adc1 |= MC13783_ADC1_RAND;
+ case MC13XXX_ADC_MODE_SINGLE_CHAN:
+ adc0 |= old_adc0 & MC13XXX_ADC0_TSMOD_MASK;
+ adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT;
+ adc1 |= MC13XXX_ADC1_RAND;
break;

- case MC13783_ADC_MODE_MULT_CHAN:
- adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
- adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
+ case MC13XXX_ADC_MODE_MULT_CHAN:
+ adc0 |= old_adc0 & MC13XXX_ADC0_TSMOD_MASK;
+ adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
break;

default:
- mc13783_unlock(mc13783);
+ mc13xxx_unlock(mc13xxx);
return -EINVAL;
}

- dev_dbg(&mc13783->mc13xxx.spidev->dev, "%s: request irq\n", __func__);
- mc13xxx_irq_request(mc13xxx, MC13783_IRQ_ADCDONE,
- mc13783_handler_adcdone, __func__, &adcdone_data);
- mc13xxx_irq_ack(mc13xxx, MC13783_IRQ_ADCDONE);
+ dev_dbg(&mc13xxx->spidev->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, MC13783_ADC0, adc0);
- mc13xxx_reg_write(mc13xxx, MC13783_ADC1, adc1);
+ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
+ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);

mc13xxx_unlock(mc13xxx);

@@ -660,27 +659,27 @@ int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,

mc13xxx_lock(mc13xxx);

- mc13xxx_irq_free(mc13xxx, MC13783_IRQ_ADCDONE, &adcdone_data);
+ mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data);

if (ret > 0)
for (i = 0; i < 4; ++i) {
ret = mc13xxx_reg_read(mc13xxx,
- MC13783_ADC2, &sample[i]);
+ MC13XXX_ADC2, &sample[i]);
if (ret)
break;
}

- if (mode == MC13783_ADC_MODE_TS)
+ if (mode == MC13XXX_ADC_MODE_TS)
/* restore TSMOD */
- mc13xxx_reg_write(mc13xxx, MC13783_ADC0, old_adc0);
+ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);

- mc13783->adcflags &= ~MC13783_ADC_WORKING;
+ mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
out:
mc13xxx_unlock(mc13xxx);

return ret;
}
-EXPORT_SYMBOL_GPL(mc13783_adc_do_conversion);
+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)
diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
index 7d0f3d6..e7a3c01 100644
--- a/include/linux/mfd/mc13783.h
+++ b/include/linux/mfd/mc13783.h
@@ -89,18 +89,15 @@ static inline int mc13783_irq_ack(struct mc13783 *mc13783, int irq)
return mc13xxx_irq_ack(mc13783_to_mc13xxx(mc13783), irq);
}

-#define MC13783_ADC0 43
-#define MC13783_ADC0_ADREFEN (1 << 10)
-#define MC13783_ADC0_ADREFMODE (1 << 11)
-#define MC13783_ADC0_TSMOD0 (1 << 12)
-#define MC13783_ADC0_TSMOD1 (1 << 13)
-#define MC13783_ADC0_TSMOD2 (1 << 14)
-#define MC13783_ADC0_ADINC1 (1 << 16)
-#define MC13783_ADC0_ADINC2 (1 << 17)
-
-#define MC13783_ADC0_TSMOD_MASK (MC13783_ADC0_TSMOD0 | \
- MC13783_ADC0_TSMOD1 | \
- MC13783_ADC0_TSMOD2)
+#define MC13783_ADC0 MC13XXX_ADC0
+#define MC13783_ADC0_ADREFEN MC13XXX_ADC0_ADREFEN
+#define MC13783_ADC0_TSMOD0 MC13XXX_ADC0_TSMOD0
+#define MC13783_ADC0_TSMOD1 MC13XXX_ADC0_TSMOD1
+#define MC13783_ADC0_TSMOD2 MC13XXX_ADC0_TSMOD2
+#define MC13783_ADC0_ADINC1 MC13XXX_ADC0_ADINC1
+#define MC13783_ADC0_ADINC2 MC13XXX_ADC0_ADINC2
+
+#define MC13783_ADC0_TSMOD_MASK MC13XXX_ADC0_TSMOD_MASK

#define mc13783_regulator_init_data mc13xxx_regulator_init_data
#define mc13783_regulator_platform_data mc13xxx_regulator_platform_data
@@ -115,12 +112,16 @@ static inline int mc13783_irq_ack(struct mc13783 *mc13783, int irq)
#define MC13783_USE_REGULATOR MC13XXX_USE_REGULATOR
#define MC13783_USE_LED MC13XXX_USE_LED

-#define MC13783_ADC_MODE_TS 1
-#define MC13783_ADC_MODE_SINGLE_CHAN 2
-#define MC13783_ADC_MODE_MULT_CHAN 3
+#define MC13783_ADC_MODE_TS MC13XXX_ADC_MODE_TS
+#define MC13783_ADC_MODE_SINGLE_CHAN MC13XXX_ADC_MODE_SINGLE_CHAN
+#define MC13783_ADC_MODE_MULT_CHAN MC13XXX_ADC_MODE_MULT_CHAN

-int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,
- unsigned int channel, unsigned int *sample);
+static inline int mc13783_adc_do_conversion(struct mc13783 *mc13783,
+ unsigned int mode, unsigned int channel, unsigned int *sample)
+{
+ return mc13xxx_adc_do_conversion(mc13783_to_mc13xxx(mc13783), mode,
+ channel, sample);
+}

#define MC13783_REG_SW1A 0
diff --git a/include/linux/mfd/mc13xxx.h b/include/linux/mfd/mc13xxx.h
index c064bea..6e7c0ac 100644
--- a/include/linux/mfd/mc13xxx.h
+++ b/include/linux/mfd/mc13xxx.h
@@ -37,6 +37,9 @@ int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq);

int mc13xxx_get_flags(struct mc13xxx *mc13xxx);

+int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx,
+ unsigned int mode, unsigned int channel, unsigned int *sample);
+
#define MC13XXX_IRQ_ADCDONE 0
#define MC13XXX_IRQ_ADCBISDONE 1
#define MC13XXX_IRQ_TS 2
@@ -150,4 +153,20 @@ struct mc13xxx_platform_data {
struct mc13xxx_leds_platform_data *leds;
};

+#define MC13XXX_ADC_MODE_TS 1
+#define MC13XXX_ADC_MODE_SINGLE_CHAN 2
+#define MC13XXX_ADC_MODE_MULT_CHAN 3
+
+#define MC13XXX_ADC0 43
+#define MC13XXX_ADC0_ADREFEN (1 << 10)
+#define MC13XXX_ADC0_TSMOD0 (1 << 12)
+#define MC13XXX_ADC0_TSMOD1 (1 << 13)
+#define MC13XXX_ADC0_TSMOD2 (1 << 14)
+#define MC13XXX_ADC0_ADINC1 (1 << 16)
+#define MC13XXX_ADC0_ADINC2 (1 << 17)
+
+#define MC13XXX_ADC0_TSMOD_MASK (MC13XXX_ADC0_TSMOD0 | \
+ MC13XXX_ADC0_TSMOD1 | \
+ MC13XXX_ADC0_TSMOD2)
+
#endif /* ifndef __LINUX_MFD_MC13XXX_H */
--
1.7.5.4

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