AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

spi/bfin_spi: sync hardware state before reprogramming everything

Browse Source 
Sometimes under load, the Blackfin core is able to send SPI register
updates out before the controller is actually disabled.  So when we
go to reprogram the entire state (to switch to a different slave),
make sure we sync after disabling the controller.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Barry Song 2009-11-30 03:49:41 +00:00 committed by Mike Frysinger
parent b052fd0a44
commit 9677b0de10
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/spi/spi_bfin5xx.c
View File

@ -247,6 +247,8 @@ static void bfin_spi_restore_state(struct master_data *drv_data)
bfin_spi_disable(drv_data); bfin_spi_disable(drv_data);
dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n"); dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n");
SSYNC();
/* Load the registers */ /* Load the registers */
write_CTRL(drv_data, chip->ctl_reg); write_CTRL(drv_data, chip->ctl_reg);
write_BAUD(drv_data, chip->baud); write_BAUD(drv_data, chip->baud);