sh: improve pinmux support for single direction pins

This patch improves the support for gpio pins that are hard wired
to either input or output and lack control register association.
A special force enum id is used to allow use without control
register but still mark the gpio pin as input or output.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/sh/kernel/gpio.c b/arch/sh/kernel/gpio.c
index 9ac0b8e6c217..d37165361034 100644
--- a/arch/sh/kernel/gpio.c
+++ b/arch/sh/kernel/gpio.c
@@ -267,9 +267,13 @@ int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
                         break;
 
                 in_range = enum_in_range(enum_id, &gpioc->function);
-                if (!in_range && range)
+                if (!in_range && range) {
                         in_range = enum_in_range(enum_id, range);
 
+                        if (in_range && enum_id == range->force)
+                                continue;
+                }
+
                 if (!in_range)
                         continue;