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Commit a7526723 authored by Daniel Schultz's avatar Daniel Schultz Committed by Greg Kroah-Hartman
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nvmem: imx-ocotp: Fix wrong register size 




[ Upstream commit 14ba972842f9e84e6d3264bc0302101b8a792288 ]

All i.MX6 SoCs have an OCOTP Controller with 4kbit fuses. The i.MX6SL is
an exception and has only 2kbit fuses.

In the TRM for the i.MX6DQ (IMX6QDRM - Rev 2, 06/2014) the fuses size is
described in chapter 46.1.1 with:
"32-bit word restricted program and read to 4Kbits of eFuse OTP(512x8)."

In the TRM for the i.MX6SL (IMX6SLRM - Rev 2, 06/2015) the fuses size is
described in chapter 34.1.1 with:
"32-bit word restricted program and read to 2 kbit of eFuse OTP(128x8)."

Since the Freescale Linux kernel OCOTP driver works with a fuses size of
2 kbit for the i.MX6SL, it looks like the TRM is wrong and the formula
to calculate the correct fuses size has to be 256x8.

Signed-off-by: default avatarDaniel Schultz <d.schultz@phytec.de>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e95ec358

drivers/nvmem/imx-ocotp.c

+1 −1
Original line number Diff line number Diff line
@@ -71,7 +71,7 @@ static struct nvmem_config imx_ocotp_nvmem_config = { 


static const struct of_device_id imx_ocotp_dt_ids[] = {

	{ .compatible = "fsl,imx6q-ocotp",  (void *)128 },

	{ .compatible = "fsl,imx6sl-ocotp", (void *)32 },

	{ .compatible = "fsl,imx6sl-ocotp", (void *)64 },

	{ .compatible = "fsl,imx6sx-ocotp", (void *)128 },

	{ },

};