patches.renesas/0468-spi-rspi-Extract-rspi_wait_for_-tx_empty-rx_full.patch

From eb2c97e62a5b4c9cec3769c42894204c73185e03 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Mon, 2 Jun 2014 15:38:03 +0200
Subject: spi: rspi: Extract rspi_wait_for_{tx_empty,rx_full}()

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit 5f684c34fc82be84ece158aa5c5c7c5072daa9a0)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/spi/spi-rspi.c | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 5639f9529e0b..d04a4acce231 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -405,11 +405,22 @@ static int rspi_wait_for_interrupt(struct rspi_data *rspi, u8 wait_mask,
 	return 0;
 }
 
+static inline int rspi_wait_for_tx_empty(struct rspi_data *rspi)
+{
+	return rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
+}
+
+static inline int rspi_wait_for_rx_full(struct rspi_data *rspi)
+{
+	return rspi_wait_for_interrupt(rspi, SPSR_SPRF, SPCR_SPRIE);
+}
+
 static int rspi_data_out(struct rspi_data *rspi, u8 data)
 {
-	if (rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE) < 0) {
+	int error = rspi_wait_for_tx_empty(rspi);
+	if (error < 0) {
 		dev_err(&rspi->master->dev, "transmit timeout\n");
-		return -ETIMEDOUT;
+		return error;
 	}
 	rspi_write_data(rspi, data);
 	return 0;
@@ -417,11 +428,13 @@ static int rspi_data_out(struct rspi_data *rspi, u8 data)
 
 static int rspi_data_in(struct rspi_data *rspi)
 {
+	int error;
 	u8 data;
 
-	if (rspi_wait_for_interrupt(rspi, SPSR_SPRF, SPCR_SPRIE) < 0) {
+	error = rspi_wait_for_rx_full(rspi);
+	if (error < 0) {
 		dev_err(&rspi->master->dev, "receive timeout\n");
-		return -ETIMEDOUT;
+		return error;
 	}
 	data = rspi_read_data(rspi);
 	return data;
@@ -737,7 +750,7 @@ static int rspi_transfer_out_in(struct rspi_data *rspi,
 	}
 
 	/* Wait for the last transmission */
-	rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
+	rspi_wait_for_tx_empty(rspi);
 
 	return 0;
 }
@@ -783,7 +796,7 @@ static int rspi_rz_transfer_out_in(struct rspi_data *rspi,
 	}
 
 	/* Wait for the last transmission */
-	rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
+	rspi_wait_for_tx_empty(rspi);
 
 	return 0;
 }
@@ -818,7 +831,7 @@ static int qspi_transfer_out_in(struct rspi_data *rspi,
 	}
 
 	/* Wait for the last transmission */
-	rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
+	rspi_wait_for_tx_empty(rspi);
 
 	return 0;
 }
@@ -836,7 +849,7 @@ static int qspi_transfer_out(struct rspi_data *rspi, struct spi_transfer *xfer)
 	}
 
 	/* Wait for the last transmission */
-	rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
+	rspi_wait_for_tx_empty(rspi);
 
 	return 0;
 }
-- 
2.1.2