diff options
Diffstat (limited to 'drivers/spi/spi-mxs.c')
| -rw-r--r-- | drivers/spi/spi-mxs.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c index 21e1dcad3914..556e5ef907fa 100644 --- a/drivers/spi/spi-mxs.c +++ b/drivers/spi/spi-mxs.c @@ -177,25 +177,23 @@ static inline void mxs_spi_disable(struct mxs_spi *spi) static int mxs_ssp_wait(struct mxs_spi *spi, int offset, int mask, bool set) { - unsigned long timeout = jiffies + msecs_to_jiffies(SSP_TIMEOUT); + const unsigned long timeout = jiffies + msecs_to_jiffies(SSP_TIMEOUT); struct mxs_ssp *ssp = &spi->ssp; uint32_t reg; - while (1) { + do { reg = readl_relaxed(ssp->base + offset); - if (set && ((reg & mask) == mask)) - break; + if (!set) + reg = ~reg; - if (!set && ((~reg & mask) == mask)) - break; + reg &= mask; - udelay(1); + if (reg == mask) + return 0; + } while (time_before(jiffies, timeout)); - if (time_after(jiffies, timeout)) - return -ETIMEDOUT; - } - return 0; + return -ETIMEDOUT; } static void mxs_ssp_dma_irq_callback(void *param) |