48 lines
1.5 KiB
Diff
48 lines
1.5 KiB
Diff
From 98e2c4efae214fb7086cac9117616eb6ea11475d Mon Sep 17 00:00:00 2001
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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
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Date: Thu, 9 Dec 2021 17:42:34 +0000
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Subject: [PATCH] nvmem: mtk-efuse: support minimum one byte access stride and
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granularity
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In order to support nvmem bits property, should support minimum 1 byte
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read stride and minimum 1 byte read granularity at the same time.
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Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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Link: https://lore.kernel.org/r/20211209174235.14049-4-srinivas.kandagatla@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/nvmem/mtk-efuse.c | 13 +++++++------
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1 file changed, 7 insertions(+), 6 deletions(-)
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--- a/drivers/nvmem/mtk-efuse.c
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+++ b/drivers/nvmem/mtk-efuse.c
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@@ -19,11 +19,12 @@ static int mtk_reg_read(void *context,
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unsigned int reg, void *_val, size_t bytes)
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{
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struct mtk_efuse_priv *priv = context;
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- u32 *val = _val;
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- int i = 0, words = bytes / 4;
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+ void __iomem *addr = priv->base + reg;
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+ u8 *val = _val;
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+ int i;
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- while (words--)
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- *val++ = readl(priv->base + reg + (i++ * 4));
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+ for (i = 0; i < bytes; i++, val++)
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+ *val = readb(addr + i);
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return 0;
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}
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@@ -45,8 +46,8 @@ static int mtk_efuse_probe(struct platfo
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if (IS_ERR(priv->base))
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return PTR_ERR(priv->base);
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- econfig.stride = 4;
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- econfig.word_size = 4;
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+ econfig.stride = 1;
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+ econfig.word_size = 1;
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econfig.reg_read = mtk_reg_read;
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econfig.size = resource_size(res);
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econfig.priv = priv;
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