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authorDaniel Ribeiro <drwyrm@gmail.com>2009-06-27 00:17:20 -0300
committerSamuel Ortiz <sameo@linux.intel.com>2009-09-17 09:46:47 +0200
commite9a22635b0d794d0cb242ffb0249f7b2a410bca2 (patch)
treecb3447e0a44f5d1478d93b11476493031ccb59ee /drivers/mfd/ezx-pcap.c
parentb1148fd46c248c8f6c9f3beb79f27cdd83702621 (diff)
downloadlinux-linaro-stable-e9a22635b0d794d0cb242ffb0249f7b2a410bca2.tar.gz
mfd: add ezx_pcap_setbits
Provides an atomic set_bits functions, as needed by the pcap-regulator driver. Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/ezx-pcap.c')
-rw-r--r--drivers/mfd/ezx-pcap.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 732664f238fe..86d394894d81 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -107,6 +107,29 @@ 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 */
int irq_to_pcap(struct pcap_chip *pcap, int irq)
{