From c7cfe23876cad22565a24a7d613dc20f8189969e Mon Sep 17 00:00:00 2001
From: Khaja Hussain Shaik Khaji <quic_kshaikkh@quicinc.com>
Date: Wed, 12 Jun 2024 15:29:45 +0530
Subject: [PATCH] power: reset: qcom-dload-mode: support for nodump mode

In case of unexpected warm-restart, device will go into special
download modes. Add support to not go into download modes
i.e., nodump mode.

Change-Id: Ica5f1b22a648458b151a8ae696e97aad83b7fc6c
Signed-off-by: Khaja Hussain Shaik Khaji <quic_kshaikkh@quicinc.com>
---
 drivers/power/reset/Kconfig           | 10 ++++++++++
 drivers/power/reset/qcom-dload-mode.c | 11 +++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index 83e6cc9dbd0d..5955c9307e9e 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -132,6 +132,16 @@ config POWER_RESET_QCOM_DOWNLOAD_MODE_DEFAULT
 
 	  Say Y here to enable "download mode" by default.
 
+config POWER_RESET_QCOM_DOWNLOAD_MODE_NODUMP
+	bool "MSM download mode as nodump"
+	depends on POWER_RESET_QCOM_DOWNLOAD_MODE
+	help
+	  Support MSM boards to be able to set nodump as download mode,
+	  when unexpected warm-restart is called, so that device will
+	  not go into ramdump path.
+
+	  Say N if not sure.
+
 config POWER_RESET_QCOM_PON
 	tristate "Qualcomm power-on driver"
 	depends on ARCH_QCOM
diff --git a/drivers/power/reset/qcom-dload-mode.c b/drivers/power/reset/qcom-dload-mode.c
index ec181d36f373..e0e966a1d7f0 100644
--- a/drivers/power/reset/qcom-dload-mode.c
+++ b/drivers/power/reset/qcom-dload-mode.c
@@ -203,6 +203,11 @@ static ssize_t dload_mode_show(struct kobject *kobj,
 	case QCOM_DOWNLOAD_BOTHDUMP:
 		mode = "both";
 		break;
+#ifdef CONFIG_POWER_RESET_QCOM_DOWNLOAD_MODE_NODUMP
+	case QCOM_DOWNLOAD_NODUMP:
+		mode = "nodump";
+		break;
+#endif
 	default:
 		mode = "unknown";
 		break;
@@ -221,6 +226,12 @@ static ssize_t dload_mode_store(struct kobject *kobj,
 		mode = QCOM_DOWNLOAD_MINIDUMP;
 	else if (sysfs_streq(buf, "both"))
 		mode = QCOM_DOWNLOAD_BOTHDUMP;
+#ifdef CONFIG_POWER_RESET_QCOM_DOWNLOAD_MODE_NODUMP
+	else if (sysfs_streq(buf, "nodump")) {
+		mode = QCOM_DOWNLOAD_NODUMP;
+		qcom_scm_disable_sdi();
+	}
+#endif
 	else {
 		pr_err("Invalid dump mode request...\n");
 		pr_err("Supported dumps: 'full', 'mini', or 'both'\n");