[v2,09/19] spi: mpc8xxx: Get rid of is_read
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Message ID 20190428202854.8590-10-jagan@amarulasolutions.com
State New
Headers show
Series
  • [v2,01/19] spi: mpc8xxx: Use short type names
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Commit Message

Jagan Teki April 28, 2019, 8:28 p.m. UTC 
From: Mario Six <mario.six@gdsys.cc>

Get rid of the is_read variable, and just keep the state of the "not
empty" and "not full" events in two boolean variables within the loop
body.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
---
 drivers/spi/mpc8xxx_spi.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

Patch
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diff --git a/drivers/spi/mpc8xxx_spi.c b/drivers/spi/mpc8xxx_spi.c
index ca34570901..962ef710f8 100644
--- a/drivers/spi/mpc8xxx_spi.c
+++ b/drivers/spi/mpc8xxx_spi.c
@@ -90,7 +90,7 @@  int spi_xfer(struct spi_slave *slave, uint bitlen, const void *dout, void *din,
 	spi8xxx_t *spi = &((immap_t *)(CONFIG_SYS_IMMR))->spi;
 	uint tmpdout, tmpdin, event;
 	int num_blks = DIV_ROUND_UP(bitlen, 32);
-	int tm, is_read = 0;
+	int tm;
 	uchar char_size = 32;
 
 	debug("%s: slave %u:%u dout %08X din %08X bitlen %u\n", __func__,
@@ -144,12 +144,14 @@  int spi_xfer(struct spi_slave *slave, uint bitlen, const void *dout, void *din,
 		 * or time out (1 second = 1000 ms)
 		 * The NE event must be read and cleared first
 		 */
-		for (tm = 0, is_read = 0; tm < SPI_TIMEOUT; ++tm) {
+		for (tm = 0; tm < SPI_TIMEOUT; ++tm) {
 			event = in_be32(&spi->event);
-			if (event & SPI_EV_NE) {
+			bool have_ne = event & SPI_EV_NE;
+			bool have_nf = event & SPI_EV_NF;
+
+			if (have_ne) {
 				tmpdin = in_be32(&spi->rx);
 				setbits_be32(&spi->event, SPI_EV_NE);
-				is_read = 1;
 
 				*(u32 *)din = (tmpdin << (32 - char_size));
 				if (char_size == 32) {
@@ -163,7 +165,7 @@  int spi_xfer(struct spi_slave *slave, uint bitlen, const void *dout, void *din,
 			 * in the future put an arbitrary delay after writing
 			 * the device.  Arbitrary delays suck, though...
 			 */
-			if (is_read && (event & SPI_EV_NF))
+			if (have_ne && have_nf)
 				break;
 		}
 		if (tm >= SPI_TIMEOUT)