spi: Fix parameter types for spi functions

1. Use size_t instead of unsigned int for bytes_out and bytes_in.
2. Use const attribute for spi_slave structure passed into xfer, claim
bus and release bus functions.

BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully

Change-Id: Ie70b3520b51c42d750f907892545510c6058f85a
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17682
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 15 insertions, 15 deletions

diff --git a/src/soc/rockchip/common/spi.c b/src/soc/rockchip/common/spi.c
index 3666de39d1..8f45679dfc 100644
--- a/src/soc/rockchip/common/spi.c
+++ b/src/soc/rockchip/common/spi.c
@@ -68,7 +68,7 @@ static struct rockchip_spi_slave rockchip_spi_slaves[] = {
 #endif
 };
 
-static struct rockchip_spi_slave *to_rockchip_spi(struct spi_slave *slave)
+static struct rockchip_spi_slave *to_rockchip_spi(const struct spi_slave *slave)
 {
 	return container_of(slave, struct rockchip_spi_slave, slave);
 }
@@ -79,13 +79,13 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs)
 	return &(rockchip_spi_slaves[bus].slave);
 }
 
-static void spi_cs_activate(struct spi_slave *slave)
+static void spi_cs_activate(const struct spi_slave *slave)
 {
 	struct rockchip_spi *regs = to_rockchip_spi(slave)->regs;
 	setbits_le32(&regs->ser, 1);
 }
 
-static void spi_cs_deactivate(struct spi_slave *slave)
+static void spi_cs_deactivate(const struct spi_slave *slave)
 {
 	struct rockchip_spi *regs = to_rockchip_spi(slave)->regs;
 	clrbits_le32(&regs->ser, 1);
@@ -157,13 +157,13 @@ void rockchip_spi_set_sample_delay(unsigned int bus, unsigned int delay_ns)
 			rsd << SPI_RXDSD_OFFSET);
 }
 
-int spi_claim_bus(struct spi_slave *slave)
+int spi_claim_bus(const struct spi_slave *slave)
 {
 	spi_cs_activate(slave);
 	return 0;
 }
 
-void spi_release_bus(struct spi_slave *slave)
+void spi_release_bus(const struct spi_slave *slave)
 {
 	spi_cs_deactivate(slave);
 }
@@ -203,11 +203,11 @@ static void set_transfer_mode(struct rockchip_spi *regs,
 
 /* returns 0 to indicate success, <0 otherwise */
 static int do_xfer(struct rockchip_spi *regs, bool use_16bit, const void *dout,
-		   unsigned int *bytes_out, void *din, unsigned int *bytes_in)
+		   size_t *bytes_out, void *din, size_t *bytes_in)
 {
 	uint8_t *in_buf = din;
 	uint8_t *out_buf = (uint8_t *)dout;
-	unsigned int min_xfer;
+	size_t min_xfer;
 
 	if (*bytes_out == 0)
 		min_xfer = *bytes_in;
@@ -268,8 +268,8 @@ unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
 	return min(65535, buf_len);
 }
 
-int spi_xfer(struct spi_slave *slave, const void *dout,
-		unsigned int bytes_out, void *din, unsigned int bytes_in)
+int spi_xfer(const struct spi_slave *slave, const void *dout,
+		size_t bytes_out, void *din, size_t bytes_in)
 {
 	struct rockchip_spi *regs = to_rockchip_spi(slave)->regs;
 	int ret = 0;
@@ -283,10 +283,10 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
 	 * seems to work fine.
 	 */
 	while (bytes_out || bytes_in) {
-		unsigned int in_now = MIN(bytes_in, 0xfffe);
-		unsigned int out_now = MIN(bytes_out, 0xfffe);
-		unsigned int in_rem, out_rem;
-		unsigned int mask;
+		size_t in_now = MIN(bytes_in, 0xfffe);
+		size_t out_now = MIN(bytes_out, 0xfffe);
+		size_t in_rem, out_rem;
+		size_t mask;
 		bool use_16bit;
 
 		rockchip_spi_enable_chip(regs, 0);
@@ -324,13 +324,13 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
 			break;
 
 		if (bytes_out) {
-			unsigned int sent = out_now - out_rem;
+			size_t sent = out_now - out_rem;
 			bytes_out -= sent;
 			dout += sent;
 		}
 
 		if (bytes_in) {
-			unsigned int received = in_now - in_rem;
+			size_t received = in_now - in_rem;
 			bytes_in -= received;
 			din += received;
 		}