diff options
| author | Raphaël Teysseyre <rteysseyre@gmail.com> | 2015-06-24 09:19:45 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-07-16 13:28:33 +0200 |
| commit | 5b2c9121ef7cf9745f0c1df10544fd0ba6a6a38c (patch) | |
| tree | fbfd26c2dd0615725efa1ecb0ce9c2aa8f52bc2a /drivers/gpio/gpio-xilinx.c | |
| parent | 6b956af0807a88c79d53e0cb2a3170a2b03e3230 (diff) | |
| download | linux-5b2c9121ef7cf9745f0c1df10544fd0ba6a6a38c.tar.gz | |
gpio/xilinx: Use correct address when setting initial values.
xgpio_save_regs() is used in this driver to setup the initial values of the registers in the hardware. The relevant registers at that time are: 0x0 -> channel 0 data (32 bits, one for each GPIO on this channel). 0x4 -> channel 0 tri, controls in/out status for each GPIO of this channel. 0x8 -> channel 1 data 0xC -> channel 1 tri gpio-xilinx.c defines these: XGPIO_DATA_OFFSET (0x0) XGPIO_TRI_OFFSET (0x4) XGPIO_CHANNEL_OFFSET 0x8 Before this patch, the "data" register value of channel 1 was written at 0x4 intead of 0x8 (overwriting the channel 0 "tri" register), and the "tri" register value for channel 1 was written at 0x8 instead of 0xC. Signed-off-by: Raphaël Teysseyre <rteysseyre@gmail.com> Reviewed-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-xilinx.c')
| -rw-r--r-- | drivers/gpio/gpio-xilinx.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c index 77fe5d3cb105..d5284dfe01fe 100644 --- a/drivers/gpio/gpio-xilinx.c +++ b/drivers/gpio/gpio-xilinx.c @@ -220,9 +220,9 @@ static void xgpio_save_regs(struct of_mm_gpio_chip *mm_gc) if (!chip->gpio_width[1]) return; - xgpio_writereg(mm_gc->regs + XGPIO_DATA_OFFSET + XGPIO_TRI_OFFSET, + xgpio_writereg(mm_gc->regs + XGPIO_DATA_OFFSET + XGPIO_CHANNEL_OFFSET, chip->gpio_state[1]); - xgpio_writereg(mm_gc->regs + XGPIO_TRI_OFFSET + XGPIO_TRI_OFFSET, + xgpio_writereg(mm_gc->regs + XGPIO_TRI_OFFSET + XGPIO_CHANNEL_OFFSET, chip->gpio_dir[1]); } |