diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/803-v5.17-0002-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch')
-rw-r--r-- | target/linux/generic/backport-5.15/803-v5.17-0002-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/803-v5.17-0002-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch b/target/linux/generic/backport-5.15/803-v5.17-0002-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch new file mode 100644 index 0000000000..785bfe53f5 --- /dev/null +++ b/target/linux/generic/backport-5.15/803-v5.17-0002-nvmem-mtk-efuse-support-minimum-one-byte-access-stri.patch @@ -0,0 +1,47 @@ +From 98e2c4efae214fb7086cac9117616eb6ea11475d Mon Sep 17 00:00:00 2001 +From: Chunfeng Yun <chunfeng.yun@mediatek.com> +Date: Thu, 9 Dec 2021 17:42:34 +0000 +Subject: [PATCH] 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: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Link: https://lore.kernel.org/r/20211209174235.14049-4-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/nvmem/mtk-efuse.c | 13 +++++++------ + 1 file changed, 7 insertions(+), 6 deletions(-) + +--- 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; + } +@@ -45,8 +46,8 @@ static int mtk_efuse_probe(struct platfo + 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.size = resource_size(res); + econfig.priv = priv; |