1 files changed, 47 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0077-soc-aspeed-Add-read-only-property-support.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0077-soc-aspeed-Add-read-only-property-support.patch
new file mode 100644
index 000000000..7ea00a4a2
--- /dev/null
+++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0077-soc-aspeed-Add-read-only-property-support.patch
@@ -0,0 +1,47 @@
+From f2d62c90f2ea05b1abf9a1887502122eefb5906d Mon Sep 17 00:00:00 2001
+From: Yong Li <yong.b.li@linux.intel.com>
+Date: Wed, 16 Oct 2019 15:11:06 +0800
+Subject: [PATCH] soc: aspeed: Add read-only property support
+
+Add a read-only property, to support export register bits as read-only.
+
+Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
+---
+ drivers/soc/aspeed/aspeed-bmc-misc.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/drivers/soc/aspeed/aspeed-bmc-misc.c b/drivers/soc/aspeed/aspeed-bmc-misc.c
+index 314007b..bf88376 100644
+--- a/drivers/soc/aspeed/aspeed-bmc-misc.c
++++ b/drivers/soc/aspeed/aspeed-bmc-misc.c
+@@ -15,6 +15,7 @@ struct aspeed_bmc_ctrl {
+ 	u32 offset;
+ 	u32 mask;
+ 	u32 shift;
++	bool read_only;
+ 	struct regmap *map;
+ 	struct kobj_attribute attr;
+ };
+@@ -55,6 +56,8 @@ static int aspeed_bmc_misc_parse_dt_child(struct device_node *child,
+ 	if (rc < 0)
+ 		return rc;
+ 
++	ctrl->read_only = of_property_read_bool(child, "read-only");
++
+ 	ctrl->mask <<= ctrl->shift;
+ 
+ 	return 0;
+@@ -116,6 +119,10 @@ static ssize_t aspeed_bmc_misc_store(struct kobject *kobj,
+ 		return rc;
+ 
+ 	ctrl = container_of(attr, struct aspeed_bmc_ctrl, attr);
++
++	if (ctrl->read_only)
++		return -EROFS;
++
+ 	val <<= ctrl->shift;
+ 	rc = regmap_update_bits(ctrl->map, ctrl->offset, ctrl->mask, val);
+ 
+-- 
+2.7.4
+