diff options
| author | mario.six@gdsys.cc <mario.six@gdsys.cc> | 2016-04-25 15:25:37 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-05-27 09:56:20 -0400 |
| commit | 71db3270dbee381ebdbc183cf88dde46d9a59afb (patch) | |
| tree | 78c527856b2a7d6581ea96eed32c03fe8ea90174 /drivers | |
| parent | f71cee4bfc9a8f9be40a49ec2da84f4344e398fc (diff) | |
| download | u-boot-imx-71db3270dbee381ebdbc183cf88dde46d9a59afb.zip u-boot-imx-71db3270dbee381ebdbc183cf88dde46d9a59afb.tar.gz u-boot-imx-71db3270dbee381ebdbc183cf88dde46d9a59afb.tar.bz2 | |
dm: gpio: pca953x: Support PCA953X with 40 GPIOs
A DM driver for PCA953x was recently introduced by Peng Fan, which lacked
support for the 40 GPIO versions.
This patch adds support for these chips.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Peng Fan <van.freenix@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/pca953x_gpio.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpio/pca953x_gpio.c b/drivers/gpio/pca953x_gpio.c index 987d10e..065b181 100644 --- a/drivers/gpio/pca953x_gpio.c +++ b/drivers/gpio/pca953x_gpio.c @@ -16,8 +16,8 @@ * * TODO: * 1. Support PCA957X_TYPE - * 2. Support max 40 gpio pins - * 3. Support Plolarity Inversion + * 2. Support 24 gpio pins + * 3. Support Polarity Inversion */ #include <common.h> @@ -47,7 +47,7 @@ enum { PCA953X_DIRECTION_OUT, }; -#define MAX_BANK 3 +#define MAX_BANK 5 #define BANK_SZ 8 DECLARE_GLOBAL_DATA_PTR; @@ -121,6 +121,9 @@ static int pca953x_read_regs(struct udevice *dev, int reg, u8 *val) ret = dm_i2c_read(dev, reg, val, 1); } else if (info->gpio_count <= 16) { ret = dm_i2c_read(dev, reg << 1, val, info->bank_count); + } else if (info->gpio_count == 40) { + /* Auto increment */ + ret = dm_i2c_read(dev, (reg << 3) | 0x80, val, info->bank_count); } else { dev_err(dev, "Unsupported now\n"); return -EINVAL; |