qpnp-smb2: add debugfs entries to force power supply updates

It is useful when debugging to force power supply changed events. Add
debugfs entries for each power supply to allow forcing power supply
changed events.

Change-Id: I018eb018de2a8119acc09824c82cca8ff1b52faa
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>

1 files changed, 75 insertions, 6 deletions

diff --git a/drivers/power/qcom-charger/qpnp-smb2.c b/drivers/power/qcom-charger/qpnp-smb2.c
index 8aaeb095db3c..bb12e74fe8bd 100644
--- a/drivers/power/qcom-charger/qpnp-smb2.c
+++ b/drivers/power/qcom-charger/qpnp-smb2.c
@@ -10,6 +10,7 @@
  * GNU General Public License for more details.
  */
 
+#include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
@@ -219,9 +220,10 @@ struct smb_dt_props {
 };
 
 struct smb2 {
-	struct smb_charger chg;
-	struct smb_dt_props dt;
-	bool bad_part;
+	struct smb_charger	chg;
+	struct dentry		*dfs_root;
+	struct smb_dt_props	dt;
+	bool			bad_part;
 };
 
 static int __debug_mask;
@@ -1438,9 +1440,74 @@ static int smb2_request_interrupts(struct smb2 *chip)
 	return rc;
 }
 
-/*********
- * PROBE *
- *********/
+#if defined(CONFIG_DEBUG_FS)
+
+static int force_batt_psy_update_write(void *data, u64 val)
+{
+	struct smb_charger *chg = data;
+
+	power_supply_changed(chg->batt_psy);
+	return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(force_batt_psy_update_ops, NULL,
+			force_batt_psy_update_write, "0x%02llx\n");
+
+static int force_usb_psy_update_write(void *data, u64 val)
+{
+	struct smb_charger *chg = data;
+
+	power_supply_changed(chg->usb_psy);
+	return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(force_usb_psy_update_ops, NULL,
+			force_usb_psy_update_write, "0x%02llx\n");
+
+static int force_dc_psy_update_write(void *data, u64 val)
+{
+	struct smb_charger *chg = data;
+
+	power_supply_changed(chg->dc_psy);
+	return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(force_dc_psy_update_ops, NULL,
+			force_dc_psy_update_write, "0x%02llx\n");
+
+static void smb2_create_debugfs(struct smb2 *chip)
+{
+	struct dentry *file;
+
+	chip->dfs_root = debugfs_create_dir("charger", NULL);
+	if (IS_ERR_OR_NULL(chip->dfs_root)) {
+		pr_err("Couldn't create charger debugfs rc=%ld\n",
+			(long)chip->dfs_root);
+		return;
+	}
+
+	file = debugfs_create_file("force_batt_psy_update", S_IRUSR | S_IWUSR,
+			    chip->dfs_root, chip, &force_batt_psy_update_ops);
+	if (IS_ERR_OR_NULL(file))
+		pr_err("Couldn't create force_batt_psy_update file rc=%ld\n",
+			(long)file);
+
+	file = debugfs_create_file("force_usb_psy_update", S_IRUSR | S_IWUSR,
+			    chip->dfs_root, chip, &force_usb_psy_update_ops);
+	if (IS_ERR_OR_NULL(file))
+		pr_err("Couldn't create force_usb_psy_update file rc=%ld\n",
+			(long)file);
+
+	file = debugfs_create_file("force_dc_psy_update", S_IRUSR | S_IWUSR,
+			    chip->dfs_root, chip, &force_dc_psy_update_ops);
+	if (IS_ERR_OR_NULL(file))
+		pr_err("Couldn't create force_dc_psy_update file rc=%ld\n",
+			(long)file);
+}
+
+#else
+
+static void smb2_create_debugfs(struct smb2 *chip)
+{}
+
+#endif
 
 static int smb2_probe(struct platform_device *pdev)
 {
@@ -1552,6 +1619,8 @@ static int smb2_probe(struct platform_device *pdev)
 		goto cleanup;
 	}
 
+	smb2_create_debugfs(chip);
+
 	pr_info("QPNP SMB2 probed successfully\n");
 	return rc;