mfd: Provide a generic version of mc13xxx adc_do_conversion

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-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

3 files changed, 81 insertions, 62 deletions

diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 7e4d44bf92ab..5ee5e64d586b 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 7d0f3d6a0002..e7a3c0169f63 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 c064beaaccb7..6e7c0ac36d09 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 */