Subject: [PATCH] [SPI][POWERPC] spi_mpc83xx: in "QE mode" spiclk is sysclk/2

From: Anton Vorontsov <[email-masked]>
Date: Thu, 2 Aug 2007 18:26:41 +0400

For MPC8349E input to SPIBRG is SYSCLK, but it's SYSCLK/2 for
MPC8323E (running in so-called "QE mode").

This fixes clocking issues I've noticed recently.

Probably someday mpc83xx_spi->sysclk should be renamed to
mpc83xx_spi->spiclk to be less confusing.

Signed-off-by: Anton Vorontsov <[email-masked]>
---
 drivers/spi/spi_mpc83xx.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index 0c16a2b..55230f7 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -429,13 +429,17 @@ static int __init mpc83xx_spi_probe(struct platform_device *dev)
 	mpc83xx_spi->bitbang.chipselect = mpc83xx_spi_chipselect;
 	mpc83xx_spi->bitbang.setup_transfer = mpc83xx_spi_setup_transfer;
 	mpc83xx_spi->bitbang.txrx_bufs = mpc83xx_spi_bufs;
-	mpc83xx_spi->sysclk = pdata->sysclk;
 	mpc83xx_spi->activate_cs = pdata->activate_cs;
 	mpc83xx_spi->deactivate_cs = pdata->deactivate_cs;
 	mpc83xx_spi->qe_mode = pdata->qe_mode;
 	mpc83xx_spi->get_rx = mpc83xx_spi_rx_buf_u8;
 	mpc83xx_spi->get_tx = mpc83xx_spi_tx_buf_u8;
 
+	if (mpc83xx_spi->qe_mode)
+		mpc83xx_spi->sysclk = pdata->sysclk / 2;
+	else
+		mpc83xx_spi->sysclk = pdata->sysclk;
+
 	mpc83xx_spi->rx_shift = 0;
 	mpc83xx_spi->tx_shift = 0;
 	if (mpc83xx_spi->qe_mode) {
-- 
1.5.0.6