| developer | 44e1bbf | 2022-01-28 17:20:00 +0800 | [diff] [blame] | 1 | From 44ae4ed142265a6d50a9d3e6f4c395f97b6849ab Mon Sep 17 00:00:00 2001 |
| 2 | From: Zhanyong Wang <zhanyong.wang@mediatek.com> |
| 3 | Date: Sat, 6 Nov 2021 20:06:30 +0800 |
| 4 | Subject: [PATCH 2/5] nvmem: mtk-efuse: support minimum one byte access stride |
| 5 | and granularity |
| 6 | |
| 7 | In order to support nvmem bits property, should support minimum 1 byte |
| 8 | read stride and minimum 1 byte read granularity at the same time. |
| 9 | |
| 10 | Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> |
| 11 | Signed-off-by: Zhanyong Wang <zhanyong.wang@mediatek.com> |
| 12 | Change-Id: Iafe1ebf195d58a3e9e3518913f795d14a01dfd3b |
| 13 | --- |
| 14 | drivers/nvmem/mtk-efuse.c | 13 +++++++------ |
| 15 | 1 file changed, 7 insertions(+), 6 deletions(-) |
| 16 | |
| 17 | diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c |
| 18 | index 856d9c3fc38e..2e728fed0b49 100644 |
| 19 | --- a/drivers/nvmem/mtk-efuse.c |
| 20 | +++ b/drivers/nvmem/mtk-efuse.c |
| 21 | @@ -19,11 +19,12 @@ static int mtk_reg_read(void *context, |
| 22 | unsigned int reg, void *_val, size_t bytes) |
| 23 | { |
| 24 | struct mtk_efuse_priv *priv = context; |
| 25 | - u32 *val = _val; |
| 26 | - int i = 0, words = bytes / 4; |
| 27 | + void __iomem *addr = priv->base + reg; |
| 28 | + u8 *val = _val; |
| 29 | + int i; |
| 30 | |
| 31 | - while (words--) |
| 32 | - *val++ = readl(priv->base + reg + (i++ * 4)); |
| 33 | + for (i = 0; i < bytes; i++, val++) |
| 34 | + *val = readb(addr + i); |
| 35 | |
| 36 | return 0; |
| 37 | } |
| 38 | @@ -58,8 +59,8 @@ static int mtk_efuse_probe(struct platform_device *pdev) |
| 39 | if (IS_ERR(priv->base)) |
| 40 | return PTR_ERR(priv->base); |
| 41 | |
| 42 | - econfig.stride = 4; |
| 43 | - econfig.word_size = 4; |
| 44 | + econfig.stride = 1; |
| 45 | + econfig.word_size = 1; |
| 46 | econfig.reg_read = mtk_reg_read; |
| 47 | econfig.reg_write = mtk_reg_write; |
| 48 | econfig.size = resource_size(res); |
| 49 | -- |
| 50 | 2.18.0 |
| 51 | |