Add write support to the meson-gx efuse driver. Beware, this efuse is one time programmable !
Signed-off-by: Jerome Brunet <[email protected]> --- 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
