diff mbox

[U-Boot,v2,14/40] i2c: tegra: Implement i2c_get_bus_num_fdt()

Message ID 1409067268-956-15-git-send-email-thierry.reding@gmail.com
State Superseded
Delegated to: Tom Warren
Headers show

Commit Message

Thierry Reding Aug. 26, 2014, 3:34 p.m. UTC 
From: Thierry Reding <treding@nvidia.com>

This is useful to retrieve the U-Boot bus number of an I2C controller
given a device tree node.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/i2c/tegra_i2c.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Simon Glass Sept. 2, 2014, 7:24 p.m. UTC | #1 
On 26 August 2014 09:34, Thierry Reding <thierry.reding@gmail.com> wrote:
> From: Thierry Reding <treding@nvidia.com>
>
> This is useful to retrieve the U-Boot bus number of an I2C controller
> given a device tree node.
>
> Signed-off-by: Thierry Reding <treding@nvidia.com>

Acked-by: Simon Glass <sjg@chromium.org>
diff mbox

Patch

diff --git a/drivers/i2c/tegra_i2c.c b/drivers/i2c/tegra_i2c.c
index 257b72f0f7cd..94453765369d 100644
--- a/drivers/i2c/tegra_i2c.c
+++ b/drivers/i2c/tegra_i2c.c
@@ -21,6 +21,7 @@  DECLARE_GLOBAL_DATA_PTR;
 
 /* Information about i2c controller */
 struct i2c_bus {
+	int			node;
 	int			id;
 	enum periph_id		periph_id;
 	int			speed;
@@ -400,6 +401,7 @@  static int process_nodes(const void *blob, int node_list[], int count,
 			continue;
 
 		i2c_bus = &i2c_controllers[i];
+		i2c_bus->node = node;
 		i2c_bus->id = i;
 
 		if (i2c_get_config(blob, node, i2c_bus)) {
@@ -624,6 +626,17 @@  int tegra_i2c_get_dvc_bus_num(void)
 	return -1;
 }
 
+int i2c_get_bus_num_fdt(int node)
+{
+	unsigned int i;
+
+	for (i = 0; i < TEGRA_I2C_NUM_CONTROLLERS; i++)
+		if (node == i2c_controllers[i].node)
+			return i;
+
+	return -1;
+}
+
 /*
  * Register soft i2c adapters
  */