linux-kernel - [PATCH] spi_topcliff_pch: Fix data transfer issue

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Date:	Fri, 24 Dec 2010 11:40:50 +0900
From:	Tomoya MORINAGA <tomoya-linux@....okisemi.com>
To:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Grant Likely <grant.likely@...retlab.ca>,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Cc:	Tomoya MORINAGA <tomoya-linux@....okisemi.com>
Subject: [PATCH] spi_topcliff_pch: Fix data transfer issue

It seems spi_topcliff_pch of linux-2.6.37-rc6 degraded by previous patch.
In fact, data transfer fails on evaluation board testing.
I found like the following register miss-setting line.
Using this patch, I have confirmed data transfer can work well.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@....okisemi.com>
---
 drivers/spi/spi_topcliff_pch.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi_topcliff_pch.c b/drivers/spi/spi_topcliff_pch.c
index 58e187f..56b7588 100644
--- a/drivers/spi/spi_topcliff_pch.c
+++ b/drivers/spi/spi_topcliff_pch.c
@@ -267,7 +267,7 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val,
 	if (reg_spsr_val & SPSR_FI_BIT) {
 		/* disable FI & RFI interrupts */
 		pch_spi_setclr_reg(data->master, PCH_SPCR, 0,
-				   SPCR_FIE_BIT | SPCR_TFIE_BIT);
+				   SPCR_FIE_BIT | SPCR_RFIE_BIT);
 
 		/* transfer is completed;inform pch_spi_process_messages */
 		data->transfer_complete = true;
@@ -679,11 +679,11 @@ static void pch_spi_set_ir(struct pch_spi_data *data)
 	if ((data->bpw_len) > PCH_MAX_FIFO_DEPTH) {
 		/* set receive threhold to PCH_RX_THOLD */
 		pch_spi_setclr_reg(data->master, PCH_SPCR,
-				   PCH_RX_THOLD << SPCR_TFIC_FIELD,
-				   ~MASK_TFIC_SPCR_BITS);
+				   PCH_RX_THOLD << SPCR_RFIC_FIELD,
+				   ~MASK_RFIC_SPCR_BITS);
 		/* enable FI and RFI interrupts */
 		pch_spi_setclr_reg(data->master, PCH_SPCR,
-				   SPCR_RFIE_BIT | SPCR_TFIE_BIT, 0);
+				   SPCR_RFIE_BIT | SPCR_FIE_BIT, 0);
 	} else {
 		/* set receive threhold to maximum */
 		pch_spi_setclr_reg(data->master, PCH_SPCR,
-- 
1.6.0.6

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