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authorBryan O'Donoghue <pure.logic@nexus-software.ie>2017-10-24 10:54:27 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-11-08 14:19:05 +0100
commit9d6a8dab8d8b94975d7d78a7866053bd1c9444ca (patch)
treee6efc5baecaa62766436011f7a4a033e939ffa6f /drivers/nvmem
parent71c5dd5002b11d240c9b0e4adc972903183000aa (diff)
nvmem: imx-ocotp: Restrict OTP write to IMX6 processors
i.MX7S/D have a different scheme for addressing the OTP registers inside the OCOTP block. Currently it's possible to address the wrong OTP registers given the disparity between IMX6 and IMX7 OTP addressing. Since OTP programming is one-time destructive its important we restrict this interface ASAP. Fixes: 0642bac7da42 ("nvmem: imx-ocotp: add write support") Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Acked-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/imx-ocotp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index e57e2a57aa3f..653cff9d9927 100644
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c
@@ -346,6 +346,8 @@ static int imx_ocotp_probe(struct platform_device *pdev)
imx_ocotp_nvmem_config.dev = dev;
imx_ocotp_nvmem_config.priv = priv;
priv->config = &imx_ocotp_nvmem_config;
+ if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx7d-ocotp"))
+ imx_ocotp_nvmem_config.read_only = true;
nvmem = nvmem_register(&imx_ocotp_nvmem_config);
if (IS_ERR(nvmem))

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