Commit 9b5c9f04 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Wolfram Sang

i2c: designware-baytrail: describe magic numbers

The patch converts hardcoded numerical constants to a named ones.

While here, align the variable name in get_sem() and reset_semaphore().
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarDavid E. Box <david.e.box@linux.intel.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 13a7a6ac
......@@ -22,22 +22,24 @@
#define SEMAPHORE_TIMEOUT 100
#define PUNIT_SEMAPHORE 0x7
#define PUNIT_SEMAPHORE_BIT BIT(0)
#define PUNIT_SEMAPHORE_ACQUIRE BIT(1)
static unsigned long acquired;
static int get_sem(struct device *dev, u32 *sem)
{
u32 reg_val;
u32 data;
int ret;
ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ, PUNIT_SEMAPHORE,
&reg_val);
&data);
if (ret) {
dev_err(dev, "iosf failed to read punit semaphore\n");
return ret;
}
*sem = reg_val & 0x1;
*sem = data & PUNIT_SEMAPHORE_BIT;
return 0;
}
......@@ -52,7 +54,7 @@ static void reset_semaphore(struct device *dev)
return;
}
data = data & 0xfffffffe;
data &= ~PUNIT_SEMAPHORE_BIT;
if (iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
PUNIT_SEMAPHORE, data))
dev_err(dev, "iosf failed to reset punit semaphore during write\n");
......@@ -70,9 +72,9 @@ int baytrail_i2c_acquire(struct dw_i2c_dev *dev)
if (!dev->acquire_lock)
return 0;
/* host driver writes 0x2 to side band semaphore register */
/* host driver writes to side band semaphore register */
ret = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
PUNIT_SEMAPHORE, 0x2);
PUNIT_SEMAPHORE, PUNIT_SEMAPHORE_ACQUIRE);
if (ret) {
dev_err(dev->dev, "iosf punit semaphore request failed\n");
return ret;
......
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