[U-Boot] [PATCH 03/50] dm: pinctrl: Add a function to parse PIN_CONFIG flags

Simon Glass
2016-01-13T23:24:53Z

Add a function which produces a flags word from a few common PIN_CONFIG
settings. This is useful for simple pinctrl drivers that don't need to worry
about drive strength, etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

drivers/pinctrl/pinctrl-uclass.c | 12 ++++++++++++
include/dm/pinctrl.h | 13 +++++++++++++
2 files changed, 25 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c
index c42b312..1acbfaf 100644
--- a/drivers/pinctrl/pinctrl-uclass.c
+++ b/drivers/pinctrl/pinctrl-uclass.c
@@ -15,6 +15,18 @@

DECLARE_GLOBAL_DATA_PTR;

+int pinctrl_decode_pin_config(const void *blob, int node)
+{
+ int flags = 0;
+
+ if (fdtdec_get_bool(blob, node, "bias-pull-up"))
+ flags |= 1 << PIN_CONFIG_BIAS_PULL_UP;
+ else if (fdtdec_get_bool(blob, node, "bias-pull-down"))
+ flags |= 1 << PIN_CONFIG_BIAS_PULL_DOWN;
+
+ return flags;
+}
+
#if CONFIG_IS_ENABLED(PINCTRL_FULL)
/**
* pinctrl_config_one() - apply pinctrl settings for a single node
diff --git a/include/dm/pinctrl.h b/include/dm/pinctrl.h
index f6025f6..5cd4503 100644
--- a/include/dm/pinctrl.h
+++ b/include/dm/pinctrl.h
@@ -284,4 +284,17 @@ int pinctrl_request_noflags(struct udevice *dev, int func);
*/
int pinctrl_get_periph_id(struct udevice *dev, struct udevice *periph);

+/**
+ * pinctrl_decode_pin_config() - decode pin configuration flags
+ *
+ * This decodes some of the PIN_CONFIG values into flags, with each value
+ * being (1 << pin_cfg). This does not support things with values like the
+ * slew rate.
+ *
+ * @blob: Device tree blob
+ * @node: Node containing the PIN_CONFIG values
+ * @return decoded flag value, or -ve on error
+ */
+int pinctrl_decode_pin_config(const void *blob, int node);
+
#endif /* __PINCTRL_H */
--
2.6.0.rc2.230.g3dd15c0