[][nvmem: porting newest upstream source code 1/5]
[Description]
Add newest upstream source code on nvmem relations.
[Release-log]
N/A
Change-Id: I999e439f6706a00593c385e7adb5367c973d644b
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5579214
diff --git a/target/linux/mediatek/patches-5.4/8005-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch b/target/linux/mediatek/patches-5.4/8005-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch
new file mode 100644
index 0000000..8de4c2a
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/8005-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch
@@ -0,0 +1,51 @@
+From 44ae4ed142265a6d50a9d3e6f4c395f97b6849ab Mon Sep 17 00:00:00 2001
+From: Zhanyong Wang <zhanyong.wang@mediatek.com>
+Date: Sat, 6 Nov 2021 20:06:30 +0800
+Subject: [PATCH 2/5] nvmem: mtk-efuse: support minimum one byte access stride
+ and granularity
+
+In order to support nvmem bits property, should support minimum 1 byte
+read stride and minimum 1 byte read granularity at the same time.
+
+Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
+Signed-off-by: Zhanyong Wang <zhanyong.wang@mediatek.com>
+Change-Id: Iafe1ebf195d58a3e9e3518913f795d14a01dfd3b
+---
+ drivers/nvmem/mtk-efuse.c | 13 +++++++------
+ 1 file changed, 7 insertions(+), 6 deletions(-)
+
+diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
+index 856d9c3fc38e..2e728fed0b49 100644
+--- a/drivers/nvmem/mtk-efuse.c
++++ b/drivers/nvmem/mtk-efuse.c
+@@ -19,11 +19,12 @@ static int mtk_reg_read(void *context,
+ unsigned int reg, void *_val, size_t bytes)
+ {
+ struct mtk_efuse_priv *priv = context;
+- u32 *val = _val;
+- int i = 0, words = bytes / 4;
++ void __iomem *addr = priv->base + reg;
++ u8 *val = _val;
++ int i;
+
+- while (words--)
+- *val++ = readl(priv->base + reg + (i++ * 4));
++ for (i = 0; i < bytes; i++, val++)
++ *val = readb(addr + i);
+
+ return 0;
+ }
+@@ -58,8 +59,8 @@ static int mtk_efuse_probe(struct platform_device *pdev)
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+- econfig.stride = 4;
+- econfig.word_size = 4;
++ econfig.stride = 1;
++ econfig.word_size = 1;
+ econfig.reg_read = mtk_reg_read;
+ econfig.reg_write = mtk_reg_write;
+ econfig.size = resource_size(res);
+--
+2.18.0
+