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authorChunfeng Yun <chunfeng.yun@mediatek.com>2021-12-09 17:42:34 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-21 10:26:50 +0100
commit98e2c4efae214fb7086cac9117616eb6ea11475d (patch)
tree7bb49edb847d3ce7d60aaa0727f9b51e75678026 /drivers/nvmem
parent9d87b0ac80e3949b372108eb6b7ae172dc71ec5c (diff)
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>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/mtk-efuse.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
index 6a537d959f14..e9a375dd84af 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;
}
@@ -45,8 +46,8 @@ 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.size = resource_size(res);
econfig.priv = priv;