pinctrl: vt8500: Change devicetree data parsing

Due to an assumption in the VT8500 pinctrl driver, the value passed
from devicetree for 'wm,pull' was not explicitly translated before
being passed to pinconf.

Since v3.10, changes to 'enum pin_config_param', PIN_CONFIG_BIAS_PULL_(UP/DOWN)
no longer map 1-to-1 with the expected values in devicetree.

This patch adds a small translation between the devicetree values (0..2)
and the enum pin_config_param equivalent values.

Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/vt8500/pinctrl-wmt.c b/drivers/pinctrl/vt8500/pinctrl-wmt.c
index b28d1af9c2320642c8ee855b07eb15c2355c4948..9802b67040cc6a49a1e4f8df15db337ae912b778 100644 (file)
--- a/drivers/pinctrl/vt8500/pinctrl-wmt.c
+++ b/drivers/pinctrl/vt8500/pinctrl-wmt.c
@@ -276,7 +276,20 @@ static int wmt_pctl_dt_node_to_map_pull(struct wmt_pinctrl_data *data,
        if (!configs)
                return -ENOMEM;
 
-       configs[0] = pull;
+       switch (pull) {
+       case 0:
+               configs[0] = PIN_CONFIG_BIAS_DISABLE;
+               break;
+       case 1:
+               configs[0] = PIN_CONFIG_BIAS_PULL_DOWN;
+               break;
+       case 2:
+               configs[0] = PIN_CONFIG_BIAS_PULL_UP;
+               break;
+       default:
+               configs[0] = PIN_CONFIG_BIAS_DISABLE;
+               dev_err(data->dev, "invalid pull state %d - disabling\n", pull);
+       }
 
        map->type = PIN_MAP_TYPE_CONFIGS_PIN;
        map->data.configs.group_or_pin = data->groups[group];