It can be useful to control the different power states of various
parts of hardware for device testing. Add a debugfs node to send
messages through qmp to aoss for debugging and testing purposes.
Signed-off-by: Chris Lew <clew@xxxxxxxxxxxxxx>
---
drivers/soc/qcom/qcom_aoss.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/soc/qcom/qcom_aoss.c b/drivers/soc/qcom/qcom_aoss.c
index 8f052db1880a..2fd755d2a92d 100644
--- a/drivers/soc/qcom/qcom_aoss.c
+++ b/drivers/soc/qcom/qcom_aoss.c
@@ -4,6 +4,7 @@
*/
#include <dt-bindings/power/qcom-aoss-qmp.h>
#include <linux/clk-provider.h>
+#include <linux/debugfs.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/mailbox_client.h>
@@ -85,6 +86,8 @@ struct qmp {
struct clk_hw qdss_clk;
struct genpd_onecell_data pd_data;
struct qmp_cooling_device *cooling_devs;
+
+ struct dentry *debugfs_fp;
};
struct qmp_pd {
@@ -541,6 +544,34 @@ struct qmp_device *qmp_get(struct device_node *np)
}
EXPORT_SYMBOL_GPL(qmp_get);
+static ssize_t aoss_dbg_write(struct file *file, const char __user *userstr,
+ size_t len, loff_t *pos)
+{
+ struct qmp *qmp = file->private_data;
+ char buf[QMP_MSG_LEN] = {};
+ int ret;
+
+ if (!len || len >= QMP_MSG_LEN)
+ return len;
+
+ ret = copy_from_user(buf, userstr, len);
+ if (ret) {
+ dev_err(qmp->dev, "copy from user failed, ret:%d\n", ret);
+ return len;
+ }
+
+ ret = qmp_send(qmp, buf, QMP_MSG_LEN);
+ if (ret)
+ dev_err(qmp->dev, "debug send failed, ret:%d\n", ret);
+
+ return len;
+}
+
+static const struct file_operations aoss_dbg_fops = {
+ .open = simple_open,
+ .write = aoss_dbg_write,
+};
+
static int qmp_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -595,6 +626,9 @@ static int qmp_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, qmp);
+ qmp->debugfs_fp = debugfs_create_file("aoss_send_message", 0220, NULL,
+ qmp, &aoss_dbg_fops);
+
return 0;
err_remove_qdss_clk:
@@ -611,6 +645,8 @@ static int qmp_remove(struct platform_device *pdev)
{
struct qmp *qmp = platform_get_drvdata(pdev);
+ debugfs_remove(qmp->debugfs_fp);
+
qmp_qdss_clk_remove(qmp);
qmp_pd_remove(qmp);
qmp_cooling_devices_remove(qmp);
--
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a Linux Foundation Collaborative Project
