From 9a6e180af78247e3a7680460240bb450c39d3a5b Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 16 Mar 2011 22:10:52 -0700 Subject: [PATCH] Input: tsc2005 - do not use 0 in place of NULL Sparse in unhappy when people use 0 instead of NULL for pointers so let's rework the way we initialize spi_transfer structure in tsc2005_cmd() and tsc2005_write(). Tested-by: Aaro Koskinen Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/tsc2005.c | 36 ++++++++++++++++-------------------- 1 file changed, 16 insertions(+), 20 deletions(-) diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c index f457cb9..289057e 100644 --- a/drivers/input/touchscreen/tsc2005.c +++ b/drivers/input/touchscreen/tsc2005.c @@ -148,16 +148,13 @@ struct tsc2005 { static void tsc2005_cmd(struct tsc2005 *ts, u8 cmd) { - u8 tx; + u8 tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd; + struct spi_transfer xfer = { + .tx_buf = &tx, + .len = 1, + .bits_per_word = 8, + }; struct spi_message msg; - struct spi_transfer xfer = { 0 }; - - tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd; - - xfer.tx_buf = &tx; - xfer.rx_buf = NULL; - xfer.len = 1; - xfer.bits_per_word = 8; spi_message_init(&msg); spi_message_add_tail(&xfer, &msg); @@ -166,17 +163,13 @@ static void tsc2005_cmd(struct tsc2005 *ts, u8 cmd) static void tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value) { - u32 tx; + u32 tx = ((reg | TSC2005_REG_PND0) << 16) | value; + struct spi_transfer xfer = { + .tx_buf = &tx, + .len = 4, + .bits_per_word = 24, + }; struct spi_message msg; - struct spi_transfer xfer = { 0 }; - - tx = (reg | TSC2005_REG_PND0) << 16; - tx |= value; - - xfer.tx_buf = &tx; - xfer.rx_buf = NULL; - xfer.len = 4; - xfer.bits_per_word = 24; spi_message_init(&msg); spi_message_add_tail(&xfer, &msg); @@ -185,6 +178,8 @@ static void tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value) static void tsc2005_setup_read(struct tsc2005_spi_rd *rd, u8 reg, bool last) { + memset(rd, 0, sizeof(*rd)); + rd->spi_tx = (reg | TSC2005_REG_READ) << 16; rd->spi_xfer.tx_buf = &rd->spi_tx; rd->spi_xfer.rx_buf = &rd->spi_rx; @@ -195,14 +190,15 @@ static void tsc2005_setup_read(struct tsc2005_spi_rd *rd, u8 reg, bool last) static void tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value) { + struct tsc2005_spi_rd spi_rd; struct spi_message msg; - struct tsc2005_spi_rd spi_rd = { { 0 }, 0, 0 }; tsc2005_setup_read(&spi_rd, reg, true); spi_message_init(&msg); spi_message_add_tail(&spi_rd.spi_xfer, &msg); spi_sync(ts->spi, &msg); + *value = spi_rd.spi_rx; } -- 2.7.4