diff options
author | Luka Pivk <luka.pivk@toradex.com> | 2019-01-08 07:02:41 +0100 |
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committer | Luka Pivk <luka.pivk@toradex.com> | 2019-01-08 07:02:41 +0100 |
commit | 43f61e8df71c474cd56b5c971096b9cf8d36cd95 (patch) | |
tree | 0031be65fcc2fd2fd3eceeee9558b5526a19e431 /drivers/gpio/gpio-max7301.c | |
parent | 5656ec50dc9950db865d53306326b1a732e3738e (diff) | |
parent | c04c050f5bf98845bfe22164b8a1503d696a6e26 (diff) |
Merge remote-tracking branch 'remotes/origin/linux-4.19.y'toradex_4.19.y
Signed-off-by: Luka Pivk <luka.pivk@toradex.com>
Diffstat (limited to 'drivers/gpio/gpio-max7301.c')
-rw-r--r-- | drivers/gpio/gpio-max7301.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/gpio/gpio-max7301.c b/drivers/gpio/gpio-max7301.c index 05813fbf3daf..647dfbbc4e1c 100644 --- a/drivers/gpio/gpio-max7301.c +++ b/drivers/gpio/gpio-max7301.c @@ -25,7 +25,7 @@ static int max7301_spi_write(struct device *dev, unsigned int reg, struct spi_device *spi = to_spi_device(dev); u16 word = ((reg & 0x7F) << 8) | (val & 0xFF); - return spi_write(spi, (const u8 *)&word, sizeof(word)); + return spi_write_then_read(spi, &word, sizeof(word), NULL, 0); } /* A read from the MAX7301 means two transfers; here, one message each */ @@ -37,14 +37,8 @@ static int max7301_spi_read(struct device *dev, unsigned int reg) struct spi_device *spi = to_spi_device(dev); word = 0x8000 | (reg << 8); - ret = spi_write(spi, (const u8 *)&word, sizeof(word)); - if (ret) - return ret; - /* - * This relies on the fact, that a transfer with NULL tx_buf shifts out - * zero bytes (=NOOP for MAX7301) - */ - ret = spi_read(spi, (u8 *)&word, sizeof(word)); + ret = spi_write_then_read(spi, &word, sizeof(word), &word, + sizeof(word)); if (ret) return ret; return word & 0xff; |