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Message-Id: <20200310132257.23358-14-srinivas.kandagatla@linaro.org>
Date: Tue, 10 Mar 2020 13:22:56 +0000
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>,
Mathieu Malaterre <malat@...ian.org>,
Paul Cercueil <paul@...pouillou.net>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 13/14] Documentation: ABI: nvmem: add documentation for JZ4780 efuse ABI
From: PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
This patch brings support for the JZ4780 efuse. Currently it only exposes
a read only access to the entire 8K bits efuse memory.
Tested-by: Mathieu Malaterre <malat@...ian.org>
Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
Signed-off-by: Mathieu Malaterre <malat@...ian.org>
Reviewed-by: Paul Cercueil <paul@...pouillou.net>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
.../ABI/testing/sysfs-driver-jz4780-efuse | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-driver-jz4780-efuse
diff --git a/Documentation/ABI/testing/sysfs-driver-jz4780-efuse b/Documentation/ABI/testing/sysfs-driver-jz4780-efuse
new file mode 100644
index 000000000000..bb6f5d6ceea0
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-jz4780-efuse
@@ -0,0 +1,16 @@
+What: /sys/devices/*/<our-device>/nvmem
+Date: December 2017
+Contact: PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
+Description: read-only access to the efuse on the Ingenic JZ4780 SoC
+ The SoC has a one time programmable 8K efuse that is
+ split into segments. The driver supports read only.
+ The segments are
+ 0x000 64 bit Random Number
+ 0x008 128 bit Ingenic Chip ID
+ 0x018 128 bit Customer ID
+ 0x028 3520 bit Reserved
+ 0x1E0 8 bit Protect Segment
+ 0x1E1 2296 bit HDMI Key
+ 0x300 2048 bit Security boot key
+Users: any user space application which wants to read the Chip
+ and Customer ID
--
2.21.0
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