sh: pfc: Fix up GPIO mux type reconfig case.

Some drivers need to switch pin states between GPIO and pin function at
runtime, which was inadvertently broken in the pinctrl driver for GPIOs
being bound to a specific direction.

This fixes up the request path to ensure that previously configured GPIOs
don't cause us to inadvertently error out with an unsupported mux on
reconfig, which in practice is primarily aimed at trapping pull-up/down
users that have yet to be implemented under the new API.

Fixes up regressions in the TPU PWM driver, amongst others.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c
index a3ac39b79192a4c8f2de0d063054f5477a1f257a..0646bf6e7889a10ed6e4773af378c264377d5f8b 100644 (file)
--- a/drivers/sh/pfc/pinctrl.c
+++ b/drivers/sh/pfc/pinctrl.c
@@ -208,6 +208,8 @@ static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
 
                break;
        case PINMUX_TYPE_GPIO:
+       case PINMUX_TYPE_INPUT:
+       case PINMUX_TYPE_OUTPUT:
                break;
        default:
                pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type);