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Input: tsc2005 - do not use 0 in place of NULL

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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 <aaro.koskinen@nokia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2011-03-16 22:10:52 -07:00
parent c8b6846a75
commit 9a6e180af7
1 changed files with 16 additions and 20 deletions
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36
drivers/input/touchscreen/tsc2005.c
View file

@ -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;
}