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MLK-19251-01 gpio: max732x: add output IO default voltage set 

Add output IOs defalut voltage set in device tree by add property like:
    out-default = /bits/ 16 <mask val>;

Reviewed-by: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Fugang Duan 2019-06-26 10:25:35 +08:00 committed by Dong Aisheng
parent 01f989853e
commit 5d8768625f
2 changed files with 18 additions and 0 deletions
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1
Documentation/devicetree/bindings/gpio/gpio-max732x.txt
View File

@ -31,6 +31,7 @@ Optional properties:
- first cell is the pin number
- second cell is used to specify flags
- interrupts: Interrupt specifier for the controllers interrupt.
- out-default: set the output IO default voltage. Exp: out-default = /bits/ 16 <mask val>;
Please refer to gpio.txt in this directory for details of the common GPIO
bindings used by client devices.

17
drivers/gpio/gpio-max732x.c
View File

@ -77,6 +77,12 @@
#define INT_CAPS(x) (((uint64_t)(x)) << 32)
enum {
OUTPUT_MASK,
OUTPUT_VAL,
OUTPUT_NUM,
};
enum {
MAX7319,
MAX7320,
@ -623,6 +629,8 @@ static int max732x_probe(struct i2c_client *client,
struct i2c_client *c;
uint16_t addr_a, addr_b;
int ret, nr_port;
u16 out_set[OUTPUT_NUM];
unsigned long mask, val;
pdata = dev_get_platdata(&client->dev);
node = client->dev.of_node;
@ -716,6 +724,15 @@ static int max732x_probe(struct i2c_client *client,
}
i2c_set_clientdata(client, chip);
/* set the output IO default voltage */
if (!of_property_read_u16_array(node, "out-default", out_set,
ARRAY_SIZE(out_set))) {
mask = out_set[OUTPUT_MASK] & chip->dir_output;
val = out_set[OUTPUT_VAL];
max732x_gpio_set_multiple(&chip->gpio_chip, &mask, &val);
}
return 0;
}