shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 20:07:46 +09:00
Code Issues Packages Projects Releases Wiki Activity

spi:improve spi read of full duplex

Browse Source 
1.write 0 to spi send bufer only once, or spi may receive unexpect data
This commit is contained in:
lyx
2010-09-24 23:42:20 -07:00
parent cd3d356f6e
commit 5e36b6c6f1
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/spi/rk2818_spim.c
View File

@@ -744,8 +744,8 @@ static void do_read(struct rk2818_spi *dws)
spi_enable_chip(dws, 0);
rk2818_writew(dws, SPIM_CTRLR1, dws->rx_end-dws->rx-1);
spi_enable_chip(dws, 1);
rk2818_writew(dws, SPIM_DR0, 0);
while (1) {
rk2818_writew(dws, SPIM_DR0, 0);
if (dws->read(dws))
break;
if (count ++ == 0x20) {