| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 84/91] nvmem: imx-ocotp: Fix wrong register size | Date | Fri, 4 Aug 2017 16:16:20 -0700 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Schultz <d.schultz@phytec.de>
[ 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: Daniel Schultz <d.schultz@phytec.de> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/nvmem/imx-ocotp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -88,7 +88,7 @@ static struct nvmem_config imx_ocotp_nvm 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 }, { }, };
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