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[ARM] pxa: ensure SSP TX FIFO is empty instead of not full for pxa3xx

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Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
eric miao 2007-11-23 14:55:59 +08:00 committed by Russell King
parent 5a1f21b1e5
commit 732ce16066
1 changed files with 10 additions and 0 deletions
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10
arch/arm/mach-pxa/ssp.c
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@ -138,6 +138,16 @@ int ssp_flush(struct ssp_dev *dev)
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)