From: Gwendal Grignou <gwen...@chromium.org>
Chromebooks can have more than one Embedded Controller so the
cros_ec device id has to be incremented for each EC registered.
Add code to handle multiple EC. First ec found is cros-ec0,
second cros-ec1 and so on.
Signed-off-by: Gwendal Grignou <gwen...@chromium.org>
Reviewed-by: Dmitry Torokhov <d...@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.marti...@collabora.co.uk>
---
drivers/mfd/cros_ec.c | 7 ++++++-
drivers/platform/chrome/cros_ec_dev.c | 4 ++--
include/linux/mfd/cros_ec.h | 2 ++
3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 9da95cc0a1ee..ffaf17823115 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -28,6 +28,8 @@
#define EC_COMMAND_RETRIES 50
+static int dev_id;
+
int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg)
{
@@ -134,6 +136,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
struct device *dev = ec_dev->dev;
int err = 0;
+ ec_dev->id = dev_id;
+
if (ec_dev->din_size) {
ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);
if (!ec_dev->din)
@@ -147,7 +151,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
mutex_init(&ec_dev->lock);
- err = mfd_add_devices(dev, 0, cros_devs,
+ err = mfd_add_devices(dev, ec_dev->id, cros_devs,
ARRAY_SIZE(cros_devs),
NULL, ec_dev->irq, NULL);
if (err) {
@@ -163,6 +167,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
return err;
}
#endif
+ dev_id += ARRAY_SIZE(cros_devs);
dev_info(dev, "Chrome EC device registered\n");
diff --git a/drivers/platform/chrome/cros_ec_dev.c
b/drivers/platform/chrome/cros_ec_dev.c
index 6090d0b2826f..3f5983601dd9 100644
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ b/drivers/platform/chrome/cros_ec_dev.c
@@ -178,7 +178,7 @@ static int ec_device_probe(struct platform_device *pdev)
{
struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
int retval = -ENOTTY;
- dev_t devno = MKDEV(ec_major, 0);
+ dev_t devno = MKDEV(ec_major, ec->id);
/* Instantiate it (and remember the EC) */
cdev_init(&ec->cdev, &fops);
@@ -190,7 +190,7 @@ static int ec_device_probe(struct platform_device *pdev)
}
ec->vdev = device_create(cros_class, NULL, devno, ec,
- CROS_EC_DEV_NAME);
+ CROS_EC_DEV_NAME "%d", ec->id);
if (IS_ERR(ec->vdev)) {
retval = PTR_ERR(ec->vdev);
dev_err(&pdev->dev, ": failed to create device\n");
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 14cf522123dd..8828e8ec347b 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -74,6 +74,7 @@ struct cros_ec_command {
*
* @priv: Private data
* @irq: Interrupt to use
+ * @id: Device id
* @din: input buffer (for data from EC)
* @dout: output buffer (for data to EC)
* \note
@@ -108,6 +109,7 @@ struct cros_ec_device {
/* These are used to implement the platform-specific interface */
void *priv;
int irq;
+ int id;
uint8_t *din;
uint8_t *dout;
int din_size;
--
2.1.4
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