[ARM] pxa: ensure SSP TX FIFO is empty instead of not full for pxa3xx
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c
index 575b662..4954da9 100644
--- a/arch/arm/mach-pxa/ssp.c
+++ b/arch/arm/mach-pxa/ssp.c
@@ -138,6 +138,16 @@
struct ssp_device *ssp = dev->ssp;
int timeout = TIMEOUT * 2;
+ /* ensure TX FIFO is empty instead of not full */
+ if (cpu_is_pxa3xx()) {
+ while (__raw_readl(ssp->mmio_base + SSSR) & 0xf00) {
+ if (!--timeout)
+ return -ETIMEDOUT;
+ cpu_relax();
+ }
+ timeout = TIMEOUT * 2;
+ }
+
do {
while (__raw_readl(ssp->mmio_base + SSSR) & SSSR_RNE) {
if (!--timeout)