From 9677b0de10433d31e05864dfb4bf33d0c27f752a Mon Sep 17 00:00:00 2001 From: Barry Song Date: Mon, 30 Nov 2009 03:49:41 +0000 Subject: [PATCH] spi/bfin_spi: sync hardware state before reprogramming everything 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 Signed-off-by: Mike Frysinger --- drivers/spi/spi_bfin5xx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index c23ac3b90533..54f9dbbc52e9 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -247,6 +247,8 @@ static void bfin_spi_restore_state(struct master_data *drv_data) bfin_spi_disable(drv_data); dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n"); + SSYNC(); + /* Load the registers */ write_CTRL(drv_data, chip->ctl_reg); write_BAUD(drv_data, chip->baud); -- 2.20.1