[PATCH v2] vt8500: pinctrl: Change devicetree data parsing

From: Tony Prisk
Date: Thu Jan 23 2014 - 03:54:51 EST


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.

Signed-off-by: Tony Prisk <linux@xxxxxxxxxxxxxxx>
---
v2:
Minor change in commit message to indicate time since problem occurred.
Change assigned variable to configs[0] rather than reassigning to pull.
Add a default case to the switch to prevent static checker errors.

drivers/pinctrl/vt8500/pinctrl-wmt.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/vt8500/pinctrl-wmt.c b/drivers/pinctrl/vt8500/pinctrl-wmt.c
index 39aec08..25ab2ee 100644
--- 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];
--
1.7.9.5

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