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Subject[PATCH 2/2] nvmem: meson-efuse: add write support
Date
Add write support to the meson-gx efuse driver.
Beware, this efuse is one time programmable !

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
drivers/nvmem/meson-efuse.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c
index 7ad80b80b293..30da5e1abf84 100644
--- a/drivers/nvmem/meson-efuse.c
+++ b/drivers/nvmem/meson-efuse.c
@@ -35,6 +35,20 @@ static int meson_efuse_read(void *context, unsigned int offset,
return 0;
}

+static int meson_efuse_write(void *context, unsigned int offset,
+ void *val, size_t bytes)
+{
+ u8 *buf = val;
+ int ret;
+
+ ret = meson_sm_call_write(buf, bytes, SM_EFUSE_WRITE, offset,
+ bytes, 0, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
static const struct of_device_id meson_efuse_match[] = {
{ .compatible = "amlogic,meson-gxbb-efuse", },
{ /* sentinel */ },
@@ -59,8 +73,8 @@ static int meson_efuse_probe(struct platform_device *pdev)
econfig->name = dev_name(dev);
econfig->stride = 1;
econfig->word_size = 1;
- econfig->read_only = true;
econfig->reg_read = meson_efuse_read;
+ econfig->reg_write = meson_efuse_write;
econfig->size = size;

nvmem = nvmem_register(econfig);
--
2.14.3
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