soc: qcom: smd: Make callback pass channel reference

By passing the smd channel reference to the callback, rather than the
smd device, we can open additional smd channels from sub-devices of smd
devices.

Also updates the two smd clients today found in mainline.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
index 731fa066f712..6609d7e0edb0 100644
--- a/drivers/soc/qcom/smd-rpm.c
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -33,6 +33,7 @@
  */
 struct qcom_smd_rpm {
 	struct qcom_smd_channel *rpm_channel;
+	struct device *dev;
 
 	struct completion ack;
 	struct mutex lock;
@@ -149,14 +150,14 @@ out:
 }
 EXPORT_SYMBOL(qcom_rpm_smd_write);
 
-static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev,
+static int qcom_smd_rpm_callback(struct qcom_smd_channel *channel,
 				 const void *data,
 				 size_t count)
 {
 	const struct qcom_rpm_header *hdr = data;
 	size_t hdr_length = le32_to_cpu(hdr->length);
 	const struct qcom_rpm_message *msg;
-	struct qcom_smd_rpm *rpm = dev_get_drvdata(&qsdev->dev);
+	struct qcom_smd_rpm *rpm = qcom_smd_get_drvdata(channel);
 	const u8 *buf = data + sizeof(struct qcom_rpm_header);
 	const u8 *end = buf + hdr_length;
 	char msgbuf[32];
@@ -165,7 +166,7 @@ static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev,
 
 	if (le32_to_cpu(hdr->service_type) != RPM_SERVICE_TYPE_REQUEST ||
 	    hdr_length < sizeof(struct qcom_rpm_message)) {
-		dev_err(&qsdev->dev, "invalid request\n");
+		dev_err(rpm->dev, "invalid request\n");
 		return 0;
 	}
 
@@ -206,7 +207,9 @@ static int qcom_smd_rpm_probe(struct qcom_smd_device *sdev)
 	mutex_init(&rpm->lock);
 	init_completion(&rpm->ack);
 
+	rpm->dev = &sdev->dev;
 	rpm->rpm_channel = sdev->channel;
+	qcom_smd_set_drvdata(sdev->channel, rpm);
 
 	dev_set_drvdata(&sdev->dev, rpm);