From 98e2c4efae214fb7086cac9117616eb6ea11475d Mon Sep 17 00:00:00 2001 From: Chunfeng Yun 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 Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20211209174235.14049-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman --- 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;