mtd: Add support for reading partition data from ACPI (sonic-net#216)

Current mtd driver supports reading mtd partition information from
command line and dts file, but cannot read partition information
from ACPI files.

Added code to support new partition type "acpipart" to
default_mtd_part_types structure. This partition type can be used
to configure mtd partition data in ACPI tables.

Signed-off-by: Madhava Reddy Siddareddygari <msiddare@cisco.com>

Author: msiddare

patch/cisco-mtd-part.patch

@@ -0,0 +1,33 @@
+From 157c059a2c639ecc69080ecb004a94e652467a4a Mon Sep 17 00:00:00 2001
+From: Madhava Reddy Siddareddygari <msiddare@cisco.com>
+Date: Tue, 8 Jun 2021 10:19:36 -0700
+Subject: [PATCH] mtd: Add support for reading partition data from ACPI
+
+Current mtd driver supports reading mtd partition information from
+command line and dts file, but cannot read partition information
+from ACPI files.
+
+Added code to support new partition type "acpipart" to
+default_mtd_part_types structure. This partition type can be used
+to configure mtd partition data in ACPI tables.
+
+Signed-off-by: Madhava Reddy Siddareddygari <msiddare@cisco.com>
+---
+ drivers/mtd/mtdpart.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
+index 10c53364a..1ff24e5d9 100644
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -822,6 +822,7 @@ EXPORT_SYMBOL_GPL(deregister_mtd_parser);
+ static const char * const default_mtd_part_types[] = {
+ 	"cmdlinepart",
+ 	"ofpart",
++	"acpipart",
+ 	NULL
+ };
+ 
+-- 
+2.26.2
+

patch/series

@@ -85,6 +85,8 @@ net-sch_generic-fix-the-missing-new-qdisc-assignment.patch
 0031-backport-nvme-Add-hardware-monitoring-support.patch
 0032-platform-mellanox-mlxreg-hotplug-Use-capability-regi.patch
 
+# Cisco patches for 4.19 kernel
+cisco-mtd-part.patch
 #
 # Marvell platform patches for 4.19
 armhf_secondary_boot_online.patch