From: Todd Broch <tbr...@chromium.org>
If the EC device tree node has sub-nodes, try to instantiate them as
MFD sub-devices. We can configure the EC features provided by the board.
Signed-off-by: Todd Broch <tbr...@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.marti...@collabora.co.uk>
---
Changes since v2:
- Drop if guards since of_node is unconditionally built. Suggested by Lee Jones
- Drop unneeded comment about of_platform_populate(). Suggested by Lee Jones.
- Fix error message if of_platform_populate() fails. Suggested by Lee Jones.
Changes since v1:
- Don't leave an empty struct mfd_cell array. Suggested by Lee Jones.
- Just use of_platform_populate() instead of manually iterating through
sub-devices and calling mfd_add_devices. Suggested by Lee Jones.
---
drivers/mfd/cros_ec.c | 27 ++++++++-------------------
1 file changed, 8 insertions(+), 19 deletions(-)
diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 751af0b..7c533d2 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
+#include <linux/of_platform.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/delay.h>
@@ -109,22 +110,10 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
}
EXPORT_SYMBOL(cros_ec_cmd_xfer);
-static const struct mfd_cell cros_devs[] = {
- {
- .name = "cros-ec-keyb",
- .id = 1,
- .of_compatible = "google,cros-ec-keyb",
- },
- {
- .name = "cros-ec-i2c-tunnel",
- .id = 2,
- .of_compatible = "google,cros-ec-i2c-tunnel",
- },
-};
-
int cros_ec_register(struct cros_ec_device *ec_dev)
{
struct device *dev = ec_dev->dev;
+ struct device_node *node = dev->of_node;
int err = 0;
if (ec_dev->din_size) {
@@ -140,12 +129,12 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
mutex_init(&ec_dev->lock);
- err = mfd_add_devices(dev, 0, cros_devs,
- ARRAY_SIZE(cros_devs),
- NULL, ec_dev->irq, NULL);
- if (err) {
- dev_err(dev, "failed to add mfd devices\n");
- return err;
+ if (node) {
+ err = of_platform_populate(node, NULL, NULL, dev);
+ if (err) {
+ dev_err(dev, "Failed to register subordinate devices");
+ return err;
+ }
}
dev_info(dev, "Chrome EC device registered\n");
--
2.1.0
--
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