MLK-10449-1: 74x164: Add new property registers-default

For some platform such as imx7D SDB, one pin of 74x164 to
control all peripheral power supply(PERI_3V_EN).
The pin should keep in high voltage level when 74x164 loading,
otherwise the module depend on PERI_3V3 will lose power.
So add new property registers-default into 74x164 driver.

Signed-off-by: Sandor Yu <R01008@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
(cherry picked from commit: 61fe7af7e47dd8bf6acc91ceabd9e660d28de28a)

diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index a6607fa..fbca09c 100644 (file)
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -138,6 +138,9 @@ static int gen_74x164_probe(struct spi_device *spi)
        chip->registers = nregs;
        chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers;
 
+       of_property_read_u8_array(spi->dev.of_node, "registers-default",
+                                chip->buffer, chip->registers);
+
        chip->gpio_chip.can_sleep = true;
        chip->gpio_chip.parent = &spi->dev;
        chip->gpio_chip.owner = THIS_MODULE;