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MLK-16285-2 staging: typec: tcpci: add optional reset pin support 

Some USB3 differential channel switch chips need to do reset before
functional, we add this support here.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Acked-by: Li Jun <jun.li@nxp.com>
pull/10/head
Peter Chen 2017-09-15 10:48:19 +08:00 committed by Jason Liu
parent 82d23ff109
commit dbb7fba24e
1 changed files with 10 additions and 0 deletions
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10
drivers/staging/typec/tcpci.c
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@ -701,6 +701,16 @@ snk_setting_wrong:
static int tcpci_ss_mux_control_init(struct tcpci *tcpci)
{
struct device *dev = tcpci->dev;
struct gpio_desc *gpiod_reset;
gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(gpiod_reset)) {
dev_err(dev, "Failed to request reset gpio.");
return PTR_ERR(gpiod_reset);
}
if (gpiod_reset)
usleep_range(700, 1000);
tcpci->ss_sel_gpio = devm_gpiod_get_optional(dev, "ss-sel",
GPIOD_OUT_HIGH);