1 files changed, 74 insertions, 31 deletions

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index c1de4afa89a6..016be4938e4c 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -17,6 +17,7 @@
 #include <linux/irq.h>
 #include <linux/mfd/ezx-pcap.h>
 #include <linux/spi/spi.h>
+#include <linux/gpio.h>
 
 #define PCAP_ADC_MAXQ           8
 struct pcap_adc_request {
@@ -106,11 +107,35 @@ int ezx_pcap_read(struct pcap_chip *pcap, u8 reg_num, u32 *value)
 }
 EXPORT_SYMBOL_GPL(ezx_pcap_read);
 
+int ezx_pcap_set_bits(struct pcap_chip *pcap, u8 reg_num, u32 mask, u32 val)
+{
+        int ret;
+        u32 tmp = PCAP_REGISTER_READ_OP_BIT |
+                (reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
+
+        mutex_lock(&pcap->io_mutex);
+        ret = ezx_pcap_putget(pcap, &tmp);
+        if (ret)
+                goto out_unlock;
+
+        tmp &= (PCAP_REGISTER_VALUE_MASK & ~mask);
+        tmp |= (val & mask) | PCAP_REGISTER_WRITE_OP_BIT |
+                (reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
+
+        ret = ezx_pcap_putget(pcap, &tmp);
+out_unlock:
+        mutex_unlock(&pcap->io_mutex);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(ezx_pcap_set_bits);
+
 /* IRQ */
-static inline unsigned int irq2pcap(struct pcap_chip *pcap, int irq)
+int irq_to_pcap(struct pcap_chip *pcap, int irq)
 {
-        return 1 << (irq - pcap->irq_base);
+        return irq - pcap->irq_base;
 }
+EXPORT_SYMBOL_GPL(irq_to_pcap);
 
 int pcap_to_irq(struct pcap_chip *pcap, int irq)
 {
@@ -122,7 +147,7 @@ static void pcap_mask_irq(unsigned int irq)
 {
         struct pcap_chip *pcap = get_irq_chip_data(irq);
 
-        pcap->msr |= irq2pcap(pcap, irq);
+        pcap->msr |= 1 << irq_to_pcap(pcap, irq);
         queue_work(pcap->workqueue, &pcap->msr_work);
 }
 
@@ -130,7 +155,7 @@ static void pcap_unmask_irq(unsigned int irq)
 {
         struct pcap_chip *pcap = get_irq_chip_data(irq);
 
-        pcap->msr &= ~irq2pcap(pcap, irq);
+        pcap->msr &= ~(1 << irq_to_pcap(pcap, irq));
         queue_work(pcap->workqueue, &pcap->msr_work);
 }
 
@@ -154,34 +179,38 @@ static void pcap_isr_work(struct work_struct *work)
         u32 msr, isr, int_sel, service;
         int irq;
 
-        ezx_pcap_read(pcap, PCAP_REG_MSR, &msr);
-        ezx_pcap_read(pcap, PCAP_REG_ISR, &isr);
+        do {
+                ezx_pcap_read(pcap, PCAP_REG_MSR, &msr);
+                ezx_pcap_read(pcap, PCAP_REG_ISR, &isr);
 
-        /* We cant service/ack irqs that are assigned to port 2 */
-        if (!(pdata->config & PCAP_SECOND_PORT)) {
-                ezx_pcap_read(pcap, PCAP_REG_INT_SEL, &int_sel);
-                isr &= ~int_sel;
-        }
-        ezx_pcap_write(pcap, PCAP_REG_ISR, isr);
+                /* We cant service/ack irqs that are assigned to port 2 */
+                if (!(pdata->config & PCAP_SECOND_PORT)) {
+                        ezx_pcap_read(pcap, PCAP_REG_INT_SEL, &int_sel);
+                        isr &= ~int_sel;
+                }
 
-        local_irq_disable();
-        service = isr & ~msr;
+                ezx_pcap_write(pcap, PCAP_REG_MSR, isr | msr);
+                ezx_pcap_write(pcap, PCAP_REG_ISR, isr);
 
-        for (irq = pcap->irq_base; service; service >>= 1, irq++) {
-                if (service & 1) {
-                        struct irq_desc *desc = irq_to_desc(irq);
+                local_irq_disable();
+                service = isr & ~msr;
+                for (irq = pcap->irq_base; service; service >>= 1, irq++) {
+                        if (service & 1) {
+                                struct irq_desc *desc = irq_to_desc(irq);
 
-                        if (WARN(!desc, KERN_WARNING
-                                        "Invalid PCAP IRQ %d\n", irq))
-                                break;
+                                if (WARN(!desc, KERN_WARNING
+                                                "Invalid PCAP IRQ %d\n", irq))
+                                        break;
 
-                        if (desc->status & IRQ_DISABLED)
-                                note_interrupt(irq, desc, IRQ_NONE);
-                        else
-                                desc->handle_irq(irq, desc);
+                                if (desc->status & IRQ_DISABLED)
+                                        note_interrupt(irq, desc, IRQ_NONE);
+                                else
+                                        desc->handle_irq(irq, desc);
+                        }
                 }
-        }
-        local_irq_enable();
+                local_irq_enable();
+                ezx_pcap_write(pcap, PCAP_REG_MSR, pcap->msr);
+        } while (gpio_get_value(irq_to_gpio(pcap->spi->irq)));
 }
 
 static void pcap_irq_handler(unsigned int irq, struct irq_desc *desc)
@@ -194,6 +223,19 @@ static void pcap_irq_handler(unsigned int irq, struct irq_desc *desc)
 }
 
 /* ADC */
+void pcap_set_ts_bits(struct pcap_chip *pcap, u32 bits)
+{
+        u32 tmp;
+
+        mutex_lock(&pcap->adc_mutex);
+        ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);
+        tmp &= ~(PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
+        tmp |= bits & (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
+        ezx_pcap_write(pcap, PCAP_REG_ADC, tmp);
+        mutex_unlock(&pcap->adc_mutex);
+}
+EXPORT_SYMBOL_GPL(pcap_set_ts_bits);
+
 static void pcap_disable_adc(struct pcap_chip *pcap)
 {
         u32 tmp;
@@ -216,15 +258,16 @@ static void pcap_adc_trigger(struct pcap_chip *pcap)
                 mutex_unlock(&pcap->adc_mutex);
                 return;
         }
-        mutex_unlock(&pcap->adc_mutex);
-
-        /* start conversion on requested bank */
-        tmp = pcap->adc_queue[head]->flags | PCAP_ADC_ADEN;
+        /* start conversion on requested bank, save TS_M bits */
+        ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);
+        tmp &= (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
+        tmp |= pcap->adc_queue[head]->flags | PCAP_ADC_ADEN;
 
         if (pcap->adc_queue[head]->bank == PCAP_ADC_BANK_1)
                 tmp |= PCAP_ADC_AD_SEL1;
 
         ezx_pcap_write(pcap, PCAP_REG_ADC, tmp);
+        mutex_unlock(&pcap->adc_mutex);
         ezx_pcap_write(pcap, PCAP_REG_ADR, PCAP_ADR_ASC);
 }
 
@@ -499,7 +542,7 @@ static void __exit ezx_pcap_exit(void)
         spi_unregister_driver(&ezxpcap_driver);
 }
 
-module_init(ezx_pcap_init);
+subsys_initcall(ezx_pcap_init);
 module_exit(ezx_pcap_exit);
 
 MODULE_LICENSE("GPL");