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Reviewed-by: Frank Li Signed-off-by: Alexander Stein --- drivers/nvmem/imx-ocotp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index 79dd4fda03295..c5086a16450ac 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -15,6 +15,7 @@ */ =20 #include +#include #include #include #include @@ -22,7 +23,6 @@ #include #include #include -#include =20 #define IMX_OCOTP_OFFSET_B0W0 0x400 /* Offset from base address of the * OTP Bank0 Word0 --=20 2.34.1 From nobody Sun Feb 8 23:05:34 2026 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE0901AA1D2; Fri, 7 Feb 2025 08:37:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=93.104.207.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; 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charset="utf-8" i.MX8M OCOTP supports a specific peripheral or function being fused which means disabled, so - Introduce disable_fuse for a list of possible fused peripherals. - Iterate all nodes to check accessing permission. If not allowed to be accessed, detach the node Signed-off-by: Alexander Stein Reviewed-by: Frank Li --- drivers/nvmem/Kconfig | 3 ++ drivers/nvmem/imx-ocotp.c | 74 ++++++++++++++++++++++++++++++++++++++- 2 files changed, 76 insertions(+), 1 deletion(-) diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 8671b7c974b93..ba5c928cab520 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -84,6 +84,9 @@ config NVMEM_IMX_OCOTP This driver can also be built as a module. If so, the module will be called nvmem-imx-ocotp. =20 + If built as modules, any other driver relying on this working + as access controller also needs to be a module as well. + config NVMEM_IMX_OCOTP_ELE tristate "i.MX On-Chip OTP Controller support" depends on ARCH_MXC || COMPILE_TEST diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index c5086a16450ac..b15cbdae66a7c 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -589,6 +589,74 @@ static void imx_ocotp_fixup_dt_cell_info(struct nvmem_= device *nvmem, cell->read_post_process =3D imx_ocotp_cell_pp; } =20 +static int imx_ocotp_check_access(struct ocotp_priv *priv, u32 addr, u32 b= it) +{ + u32 mask, ret, val; + + mask =3D BIT(bit); + + ret =3D imx_ocotp_read(priv, addr, &val, sizeof(val)); + if (ret) + return ret; + + /* true means disabled */ + if (val & mask) + return -EACCES; + + return 0; +} + +static int imx_ocotp_grant_access(struct ocotp_priv *priv, struct device_n= ode *parent) +{ + struct device *dev =3D priv->dev; + + for_each_available_child_of_node_scoped(parent, child) { + struct of_phandle_args args; + u32 idx =3D 0; + u32 addr; + u32 bit; + + while (!of_parse_phandle_with_args(child, "access-controllers", + "#access-controller-cells", + idx++, &args)) { + of_node_put(args.np); + if (args.np !=3D dev->of_node) + continue; + + /* Only support one cell */ + if (args.args_count !=3D 2) { + dev_err(dev, "wrong args count\n"); + continue; + } + + addr =3D args.args[0]; + bit =3D args.args[1]; + + dev_dbg(dev, "Checking node: %pOF disable fuse addr: %u, bit %u\n", chi= ld, addr, bit); + + if (imx_ocotp_check_access(priv, addr, bit)) { + of_detach_node(child); + dev_info(dev, "%pOF: disabled by fuse, device driver will not be probe= d\n", + child); + } + } + + imx_ocotp_grant_access(priv, child); + } + + return 0; +} + +static int imx_ocotp_access_control(struct ocotp_priv *priv) +{ + struct device_node *root __free(device_node) =3D of_find_node_by_path("/"= ); + + if (WARN_ON(!root)) + return -EINVAL; + + return imx_ocotp_grant_access(priv, root); +} + static int imx_ocotp_probe(struct platform_device *pdev) { struct device *dev =3D &pdev->dev; @@ -622,9 +690,13 @@ static int imx_ocotp_probe(struct platform_device *pde= v) imx_ocotp_clr_err_if_set(priv); clk_disable_unprepare(priv->clk); =20 + platform_set_drvdata(pdev, priv); + nvmem =3D devm_nvmem_register(dev, &imx_ocotp_nvmem_config); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); =20 - return PTR_ERR_OR_ZERO(nvmem); + return imx_ocotp_access_control(priv); } =20 static struct platform_driver imx_ocotp_driver =3D { --=20 2.34.1 From nobody Sun Feb 8 23:05:34 2026 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 70D401D5CE5; Fri, 7 Feb 2025 08:37:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=93.104.207.81 ARC-Seal: i=1; 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charset="utf-8" These definitions define the location of corresponding disable bits in OCOTP peripheral. Signed-off-by: Alexander Stein Reviewed-by: Peng Fan --- arch/arm64/boot/dts/freescale/imx8mn-ocotp.h | 26 ++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mn-ocotp.h diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ocotp.h b/arch/arm64/boot= /dts/freescale/imx8mn-ocotp.h new file mode 100644 index 0000000000000..43583c4a70156 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mn-ocotp.h @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT) +/* + * Copyright (c) 2025 TQ-Systems GmbH , + * D-82229 Seefeld, Germany. + * Author: Alexander Stein + */ + +#ifndef __DTS_IMX8MN_OCOTP_H +#define __DTS_IMX8MN_OCOTP_H + +/* + * The OCOTP is a tuple of + * + */ + +#define IMX8MN_OCOTP_M7_DISABLE 20 8 +#define IMX8MN_OCOTP_M7_MPU_DISABLE 20 9 +#define IMX8MN_OCOTP_M7_FPU_DISABLE 20 10 +#define IMX8MN_OCOTP_USB_OTG1_DISABLE 20 11 +#define IMX8MN_OCOTP_GPU3D_DISABLE 20 24 +#define IMX8MN_OCOTP_MIPI_DSI_DISABLE 20 28 +#define IMX8MN_OCOTP_ENET_DISABLE 20 29 +#define IMX8MN_OCOTP_MIPI_CSI_DISABLE 20 30 +#define IMX8MN_OCOTP_ASRC_DISABLE 20 31 + +#endif /* __DTS_IMX8MN_OCOTP_H */ --=20 2.34.1 From nobody Sun Feb 8 23:05:34 2026 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8997B234987; 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charset="utf-8" Mark ocotp as a access-controller and add references on peripherals which can be disabled (fused). Signed-off-by: Alexander Stein --- arch/arm64/boot/dts/freescale/imx8mn.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dt= s/freescale/imx8mn.dtsi index a5f9cfb46e5dd..ee6c3a4be87fd 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi @@ -11,6 +11,7 @@ #include #include =20 +#include "imx8mn-ocotp.h" #include "imx8mn-pinfunc.h" =20 / { @@ -431,6 +432,7 @@ easrc: easrc@300c0000 { firmware-name =3D "imx/easrc/easrc-imx8mn.bin"; fsl,asrc-rate =3D <8000>; fsl,asrc-format =3D <2>; + access-controllers =3D <&ocotp IMX8MN_OCOTP_ASRC_DISABLE>; status =3D "disabled"; }; }; @@ -571,6 +573,7 @@ ocotp: efuse@30350000 { clocks =3D <&clk IMX8MN_CLK_OCOTP_ROOT>; #address-cells =3D <1>; #size-cells =3D <1>; + #access-controller-cells =3D <2>; =20 /* * The register address below maps to the MX8M @@ -1053,6 +1056,7 @@ fec1: ethernet@30be0000 { nvmem-cells =3D <&fec_mac_address>; nvmem-cell-names =3D "mac-address"; fsl,stop-mode =3D <&gpr 0x10 3>; + access-controllers =3D <&ocotp IMX8MN_OCOTP_ENET_DISABLE>; status =3D "disabled"; }; =20 @@ -1091,6 +1095,7 @@ mipi_dsi: dsi@32e10000 { clock-names =3D "bus_clk", "sclk_mipi"; interrupts =3D ; power-domains =3D <&disp_blk_ctrl IMX8MN_DISPBLK_PD_MIPI_DSI>; + access-controllers =3D <&ocotp IMX8MN_OCOTP_MIPI_DSI_DISABLE>; status =3D "disabled"; =20 ports { @@ -1195,6 +1200,7 @@ mipi_csi: mipi-csi@32e30000 { <&clk IMX8MN_CLK_DISP_AXI_ROOT>; clock-names =3D "pclk", "wrap", "phy", "axi"; power-domains =3D <&disp_blk_ctrl IMX8MN_DISPBLK_PD_MIPI_CSI>; + access-controllers =3D <&ocotp IMX8MN_OCOTP_MIPI_CSI_DISABLE>; status =3D "disabled"; =20 ports { @@ -1225,6 +1231,7 @@ usbotg1: usb@32e40000 { phys =3D <&usbphynop1>; fsl,usbmisc =3D <&usbmisc1 0>; power-domains =3D <&pgc_hsiomix>; + access-controllers =3D <&ocotp IMX8MN_OCOTP_USB_OTG1_DISABLE>; status =3D "disabled"; }; =20 @@ -1288,6 +1295,7 @@ gpu: gpu@38000000 { <400000000>, <1200000000>; 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charset="utf-8" These definitions define the location of corresponding disable bits in OCOTP peripheral. Signed-off-by: Alexander Stein Reviewed-by: Frank Li --- arch/arm64/boot/dts/freescale/imx8mp-ocotp.h | 42 ++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-ocotp.h diff --git a/arch/arm64/boot/dts/freescale/imx8mp-ocotp.h b/arch/arm64/boot= /dts/freescale/imx8mp-ocotp.h new file mode 100644 index 0000000000000..c9f49c61f3656 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mp-ocotp.h @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT) +/* + * Copyright (c) 2025 TQ-Systems GmbH , + * D-82229 Seefeld, Germany. + * Author: Alexander Stein + */ + +#ifndef __DTS_IMX8MP_OCOTP_H +#define __DTS_IMX8MP_OCOTP_H + +/* + * The OCOTP is a tuple of + * + */ + +#define IMX8MP_OCOTP_M7_DISABLE 16 21 +#define IMX8MP_OCOTP_VPU_G1_DISABLE 16 24 +#define IMX8MP_OCOTP_VPU_G2_DISABLE 16 25 +#define IMX8MP_OCOTP_CAN_DISABLE 16 28 +#define IMX8MP_OCOTP_CAN_FD_DISABLE 16 29 +#define IMX8MP_OCOTP_VPU_VC8000E_DISABLE 16 30 +#define IMX8MP_OCOTP_IMG_ISP1_DISABLE 20 0 +#define IMX8MP_OCOTP_IMG_ISP2_DISABLE 20 1 +#define IMX8MP_OCOTP_IMG_DEWARP_DISABLE 20 2 +#define IMX8MP_OCOTP_NPU_DISABLE 20 3 +#define IMX8MP_OCOTP_AUDIO_PROCESSOR_DISABLE 20 4 +#define IMX8MP_OCOTP_ASRC_DISABLE 20 5 +#define IMX8MP_OCOTP_GPU2_DISABLE 20 6 +#define IMX8MP_OCOTP_GPU3_DISABLE 20 7 +#define IMX8MP_OCOTP_USB1_DISABLE 20 8 +#define IMX8MP_OCOTP_USB2_DISABLE 20 9 +#define IMX8MP_OCOTP_PCIE1_DISABLE 20 11 +#define IMX8MP_OCOTP_ENET1_DISABLE 20 13 +#define IMX8MP_OCOTP_ENET2_DISABLE 20 14 +#define IMX8MP_OCOTP_MIPI_CSI1_DISABLE 20 15 +#define IMX8MP_OCOTP_MIPI_CSI2_DISABLE 20 16 +#define IMX8MP_OCOTP_MIPI_DSI1_DISABLE 20 17 +#define IMX8MP_OCOTP_LVDS1_DISABLE 20 19 +#define IMX8MP_OCOTP_LVDS2_DISABLE 20 20 +#define IMX8MP_OCOTP_EARC_RX_DISABLE 20 30 + +#endif /* __DTS_IMX8MP_OCOTP_H */ --=20 2.34.1 From nobody Sun Feb 8 23:05:34 2026 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 837BC236A65; 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charset="utf-8" Mark ocotp as a access-controller and add references on peripherals which can be disabled (fused). Signed-off-by: Alexander Stein --- arch/arm64/boot/dts/freescale/imx8mp.dtsi | 26 +++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dt= s/freescale/imx8mp.dtsi index 66f7988271493..ee1cdfb660cf3 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi @@ -12,6 +12,7 @@ #include #include =20 +#include "imx8mp-ocotp.h" #include "imx8mp-pinfunc.h" =20 / { @@ -670,6 +671,7 @@ ocotp: efuse@30350000 { /* For nvmem subnodes */ #address-cells =3D <1>; #size-cells =3D <1>; + #access-controller-cells =3D <2>; =20 /* * The register address below maps to the MX8M @@ -1137,6 +1139,7 @@ flexcan1: can@308c0000 { assigned-clock-rates =3D <40000000>; fsl,clk-source =3D /bits/ 8 <0>; fsl,stop-mode =3D <&gpr 0x10 4>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_CAN_DISABLE>; status =3D "disabled"; }; =20 @@ -1152,6 +1155,7 @@ flexcan2: can@308d0000 { assigned-clock-rates =3D <40000000>; fsl,clk-source =3D /bits/ 8 <0>; fsl,stop-mode =3D <&gpr 0x10 5>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_CAN_DISABLE>; status =3D "disabled"; }; }; @@ -1371,6 +1375,7 @@ fec: ethernet@30be0000 { nvmem-cells =3D <ð_mac1>; nvmem-cell-names =3D "mac-address"; fsl,stop-mode =3D <&gpr 0x10 3>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_ENET1_DISABLE>; status =3D "disabled"; }; =20 @@ -1395,6 +1400,7 @@ eqos: ethernet@30bf0000 { nvmem-cells =3D <ð_mac2>; nvmem-cell-names =3D "mac-address"; intf_mode =3D <&gpr 0x4>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_ENET2_DISABLE>; status =3D "disabled"; }; }; @@ -1526,6 +1532,7 @@ easrc: easrc@30c90000 { firmware-name =3D "imx/easrc/easrc-imx8mn.bin"; fsl,asrc-rate =3D <8000>; fsl,asrc-format =3D <2>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_ASRC_DISABLE>; status =3D "disabled"; }; =20 @@ -1582,6 +1589,7 @@ xcvr: xcvr@30cc0000 { dmas =3D <&sdma2 30 2 0>, <&sdma2 31 2 0>; dma-names =3D "rx", "tx"; resets =3D <&audio_blk_ctrl 0>; + status =3D "disabled"; }; }; @@ -1701,6 +1709,7 @@ isp_0: isp@32e10000 { clock-names =3D "isp", "aclk", "hclk"; power-domains =3D <&media_blk_ctrl IMX8MP_MEDIABLK_PD_ISP>; fsl,blk-ctrl =3D <&media_blk_ctrl 0>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_IMG_ISP1_DISABLE>; status =3D "disabled"; =20 ports { @@ -1723,6 +1732,7 @@ isp_1: isp@32e20000 { clock-names =3D "isp", "aclk", "hclk"; power-domains =3D <&media_blk_ctrl IMX8MP_MEDIABLK_PD_ISP>; fsl,blk-ctrl =3D <&media_blk_ctrl 1>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_IMG_ISP2_DISABLE>; status =3D "disabled"; =20 ports { @@ -1743,6 +1753,7 @@ dewarp: dwe@32e30000 { <&clk IMX8MP_CLK_MEDIA_APB_ROOT>; clock-names =3D "axi", "ahb"; power-domains =3D <&media_blk_ctrl IMX8MP_MEDIABLK_PD_DWE>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_IMG_DEWARP_DISABLE>; }; =20 mipi_csi_0: csi@32e40000 { @@ -1760,6 +1771,7 @@ mipi_csi_0: csi@32e40000 { assigned-clock-parents =3D <&clk IMX8MP_SYS_PLL2_250M>, <&clk IMX8MP_CLK_24M>; power-domains =3D <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_CSI2_1>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_MIPI_CSI1_DISABLE>; status =3D "disabled"; =20 ports { @@ -1795,6 +1807,7 @@ mipi_csi_1: csi@32e50000 { assigned-clock-parents =3D <&clk IMX8MP_SYS_PLL2_250M>, <&clk IMX8MP_CLK_24M>; power-domains =3D <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_CSI2_2>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_MIPI_CSI2_DISABLE>; status =3D "disabled"; =20 ports { @@ -1829,6 +1842,7 @@ mipi_dsi: dsi@32e60000 { samsung,pll-clock-frequency =3D <24000000>; interrupts =3D ; power-domains =3D <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_DSI_1>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_MIPI_DSI1_DISABLE>; status =3D "disabled"; =20 ports { @@ -1976,6 +1990,7 @@ ldb_from_lcdif2: endpoint { }; =20 port@1 { + access-controllers =3D <&ocotp IMX8MP_OCOTP_LVDS1_DISABLE>; reg =3D <1>; =20 ldb_lvds_ch0: endpoint { @@ -1983,6 +1998,7 @@ ldb_lvds_ch0: endpoint { }; =20 port@2 { + access-controllers =3D <&ocotp IMX8MP_OCOTP_LVDS2_DISABLE>; reg =3D <2>; =20 ldb_lvds_ch1: endpoint { @@ -2198,6 +2214,7 @@ pcie: pcie@33800000 { reset-names =3D "apps", "turnoff"; phys =3D <&pcie_phy>; phy-names =3D "pcie-phy"; + access-controllers =3D <&ocotp IMX8MP_OCOTP_PCIE1_DISABLE>; status =3D "disabled"; }; =20 @@ -2227,6 +2244,7 @@ pcie_ep: pcie-ep@33800000 { phy-names =3D "pcie-phy"; num-ib-windows =3D <4>; num-ob-windows =3D <4>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_PCIE1_DISABLE>; status =3D "disabled"; }; =20 @@ -2245,6 +2263,7 @@ gpu3d: gpu@38000000 { <&clk IMX8MP_SYS_PLL1_800M>; assigned-clock-rates =3D <800000000>, <800000000>; power-domains =3D <&pgc_gpu3d>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_GPU3_DISABLE>; }; =20 gpu2d: gpu@38008000 { @@ -2259,6 +2278,7 @@ gpu2d: gpu@38008000 { assigned-clock-parents =3D <&clk IMX8MP_SYS_PLL1_800M>; assigned-clock-rates =3D <800000000>; power-domains =3D <&pgc_gpu2d>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_GPU2_DISABLE>; }; =20 vpu_g1: video-codec@38300000 { @@ -2270,6 +2290,7 @@ vpu_g1: video-codec@38300000 { assigned-clock-parents =3D <&clk IMX8MP_VPU_PLL_OUT>; assigned-clock-rates =3D <600000000>; power-domains =3D <&vpumix_blk_ctrl IMX8MP_VPUBLK_PD_G1>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_VPU_G1_DISABLE>; }; =20 vpu_g2: video-codec@38310000 { @@ -2281,6 +2302,7 @@ vpu_g2: video-codec@38310000 { assigned-clock-parents =3D <&clk IMX8MP_SYS_PLL2_1000M>; assigned-clock-rates =3D <500000000>; power-domains =3D <&vpumix_blk_ctrl IMX8MP_VPUBLK_PD_G2>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_VPU_G2_DISABLE>; }; =20 vpumix_blk_ctrl: blk-ctrl@38330000 { @@ -2313,6 +2335,7 @@ npu: npu@38500000 { <&clk IMX8MP_CLK_ML_AHB>; clock-names =3D "core", "shader", "bus", "reg"; power-domains =3D <&pgc_mlmix>; + access-controllers =3D <&ocotp IMX8MP_OCOTP_NPU_DISABLE>; }; =20 gic: interrupt-controller@38800000 { @@ -2362,6 +2385,7 @@ usb3_0: usb@32f10100 { #size-cells =3D <1>; dma-ranges =3D <0x40000000 0x40000000 0xc0000000>; ranges; + access-controllers =3D <&ocotp IMX8MP_OCOTP_USB1_DISABLE>; status =3D "disabled"; =20 usb_dwc3_0: usb@38100000 { @@ -2405,6 +2429,7 @@ usb3_1: usb@32f10108 { #size-cells =3D <1>; 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charset="utf-8" These definitions define the location of corresponding disable bits in OCOTP peripheral. Signed-off-by: Alexander Stein --- arch/arm64/boot/dts/freescale/imx8mm-ocotp.h | 31 ++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-ocotp.h diff --git a/arch/arm64/boot/dts/freescale/imx8mm-ocotp.h b/arch/arm64/boot= /dts/freescale/imx8mm-ocotp.h new file mode 100644 index 0000000000000..87698e7619262 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-ocotp.h @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT) +/* + * Copyright (c) 2025 TQ-Systems GmbH , + * D-82229 Seefeld, Germany. + * Author: Alexander Stein + */ + +#ifndef __DTS_IMX8MM_OCOTP_H +#define __DTS_IMX8MM_OCOTP_H + +/* + * The OCOTP is a tuple of + * + */ + +#define IMX8MM_OCOTP_M4_DISABLE 20 8 +#define IMX8MM_OCOTP_M4_MPU_DISABLE 20 9 +#define IMX8MM_OCOTP_M4_FPU_DISABLE 20 10 +#define IMX8MM_OCOTP_USB_OTG1_DISABLE 20 11 +#define IMX8MM_OCOTP_USB_OTG2_DISABLE 20 12 +#define IMX8MM_OCOTP_G1_DISABLE 20 18 +#define IMX8MM_OCOTP_G2_DISABLE 20 19 +#define IMX8MM_OCOTP_H1_DISABLE 20 20 +#define IMX8MM_OCOTP_GPU2D_DISABLE 20 21 +#define IMX8MM_OCOTP_PCIE1_DISABLE 20 22 +#define IMX8MM_OCOTP_GPU3D_DISABLE 20 24 +#define IMX8MM_OCOTP_MIPI_DSI_DISABLE 20 28 +#define IMX8MM_OCOTP_ENET_DISABLE 20 29 +#define IMX8MM_OCOTP_MIPI_CSI_DISABLE 20 30 + +#endif /* __DTS_IMX8MM_OCOTP_H */ --=20 2.34.1 From nobody Sun Feb 8 23:05:34 2026 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DE4F1237A3C; 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charset="utf-8" Mark ocotp as a access-controller and add references on peripherals which can be disabled (fused). Signed-off-by: Alexander Stein --- arch/arm64/boot/dts/freescale/imx8mm.dtsi | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dt= s/freescale/imx8mm.dtsi index 1b147a09f6fe8..51472313b8294 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi @@ -11,6 +11,7 @@ #include #include =20 +#include "imx8mm-ocotp.h" #include "imx8mm-pinfunc.h" =20 / { @@ -565,6 +566,7 @@ ocotp: efuse@30350000 { /* For nvmem subnodes */ #address-cells =3D <1>; #size-cells =3D <1>; + #access-controller-cells =3D <2>; =20 /* * The register address below maps to the MX8M @@ -1108,6 +1110,7 @@ fec1: ethernet@30be0000 { nvmem-cells =3D <&fec_mac_address>; nvmem-cell-names =3D "mac-address"; fsl,stop-mode =3D <&gpr 0x10 3>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_ENET_DISABLE>; status =3D "disabled"; }; =20 @@ -1157,6 +1160,7 @@ mipi_dsi: dsi@32e10000 { <&clk IMX8MM_CLK_24M>; interrupts =3D ; power-domains =3D <&disp_blk_ctrl IMX8MM_DISPBLK_PD_MIPI_DSI>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_MIPI_DSI_DISABLE>; status =3D "disabled"; =20 ports { @@ -1187,6 +1191,7 @@ csi: csi@32e20000 { clocks =3D <&clk IMX8MM_CLK_CSI1_ROOT>; clock-names =3D "mclk"; power-domains =3D <&disp_blk_ctrl IMX8MM_DISPBLK_PD_CSI_BRIDGE>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_MIPI_CSI_DISABLE>; status =3D "disabled"; =20 port { @@ -1270,6 +1275,7 @@ usbotg1: usb@32e40000 { phys =3D <&usbphynop1>; fsl,usbmisc =3D <&usbmisc1 0>; power-domains =3D <&pgc_hsiomix>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_USB_OTG1_DISABLE>; status =3D "disabled"; }; =20 @@ -1290,6 +1296,7 @@ usbotg2: usb@32e50000 { phys =3D <&usbphynop2>; fsl,usbmisc =3D <&usbmisc2 0>; power-domains =3D <&pgc_hsiomix>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_USB_OTG2_DISABLE>; status =3D "disabled"; }; =20 @@ -1375,6 +1382,7 @@ pcie0: pcie@33800000 { reset-names =3D "apps", "turnoff"; phys =3D <&pcie_phy>; phy-names =3D "pcie-phy"; + access-controllers =3D <&ocotp IMX8MM_OCOTP_PCIE1_DISABLE>; status =3D "disabled"; }; =20 @@ -1401,6 +1409,7 @@ pcie0_ep: pcie-ep@33800000 { phy-names =3D "pcie-phy"; num-ib-windows =3D <4>; num-ob-windows =3D <4>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_PCIE1_DISABLE>; status =3D "disabled"; }; =20 @@ -1418,6 +1427,7 @@ gpu_3d: gpu@38000000 { assigned-clock-parents =3D <&clk IMX8MM_GPU_PLL_OUT>; assigned-clock-rates =3D <0>, <800000000>; power-domains =3D <&pgc_gpu>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_GPU3D_DISABLE>; }; =20 gpu_2d: gpu@38008000 { @@ -1433,6 +1443,7 @@ gpu_2d: gpu@38008000 { assigned-clock-parents =3D <&clk IMX8MM_GPU_PLL_OUT>; assigned-clock-rates =3D <0>, <800000000>; power-domains =3D <&pgc_gpu>; + access-controllers =3D <&ocotp IMX8MM_OCOTP_GPU2D_DISABLE>; }; =20 vpu_g1: video-codec@38300000 { @@ -1441,6 +1452,7 @@ vpu_g1: video-codec@38300000 { interrupts =3D ; clocks =3D <&clk IMX8MM_CLK_VPU_G1_ROOT>; power-domains =3D <&vpu_blk_ctrl IMX8MM_VPUBLK_PD_G1>; 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charset="utf-8" These definitions define the location of corresponding disable bits in OCOTP peripheral. Signed-off-by: Alexander Stein Reviewed-by: Frank Li --- arch/arm64/boot/dts/freescale/imx8mq-ocotp.h | 37 ++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mq-ocotp.h diff --git a/arch/arm64/boot/dts/freescale/imx8mq-ocotp.h b/arch/arm64/boot= /dts/freescale/imx8mq-ocotp.h new file mode 100644 index 0000000000000..d991d57816264 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mq-ocotp.h @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT) +/* + * Copyright (c) 2025 TQ-Systems GmbH , + * D-82229 Seefeld, Germany. + * Author: Alexander Stein + */ + +#ifndef __DTS_IMX8MQ_OCOTP_H +#define __DTS_IMX8MQ_OCOTP_H + +/* + * The OCOTP is a tuple of + * + */ + +#define IMX8MQ_OCOTP_M4_DISABLE 20 8 +#define IMX8MQ_OCOTP_M4_MPU_DISABLE 20 9 +#define IMX8MQ_OCOTP_M4_FPU_DISABLE 20 10 +#define IMX8MQ_OCOTP_USB_OTG1_DISABLE 20 11 +#define IMX8MQ_OCOTP_USB_OTG2_DISABLE 20 12 +#define IMX8MQ_OCOTP_DOLBY_DISABLE 20 13 +#define IMX8MQ_OCOTP_VP9_DISABLE 20 18 +#define IMX8MQ_OCOTP_HEVC_DISABLE 20 19 +#define IMX8MQ_OCOTP_AVC_DISABLE 20 20 +#define IMX8MQ_OCOTP_VPU_DISABLE 20 21 +#define IMX8MQ_OCOTP_PCIE1_DISABLE 20 22 +#define IMX8MQ_OCOTP_PCIE2_DISABLE 20 23 +#define IMX8MQ_OCOTP_GPU_DISABLE 20 24 +#define IMX8MQ_OCOTP_HDMI_DISABLE 20 25 +#define IMX8MQ_OCOTP_DC_DISABLE 20 26 +#define IMX8MQ_OCOTP_HDCP_DISABLE 20 27 +#define IMX8MQ_OCOTP_MIPI_DSI_DISABLE 20 28 +#define IMX8MQ_OCOTP_ENET_DISABLE 20 29 +#define IMX8MQ_OCOTP_MIPI_CSI1_DISABLE 20 30 +#define IMX8MQ_OCOTP_MIPI_CSI2_DISABLE 20 31 + +#endif /* __DTS_IMX8MQ_OCOTP_H */ --=20 2.34.1 From nobody Sun Feb 8 23:05:34 2026 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D476238737; 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charset="utf-8" Mark ocotp as a access-controller and add references on peripherals which can be disabled (fused). Signed-off-by: Alexander Stein --- arch/arm64/boot/dts/freescale/imx8mq.dtsi | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dt= s/freescale/imx8mq.dtsi index df8ba1d5391ae..95a40cccd46b9 100644 --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi @@ -12,6 +12,7 @@ #include #include #include +#include "imx8mq-ocotp.h" #include "imx8mq-pinfunc.h" =20 / { @@ -1275,6 +1276,7 @@ mipi_dsi: dsi@30a00000 { <&src IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N>, <&src IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N>; reset-names =3D "byte", "dpi", "esc", "pclk"; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_MIPI_DSI_DISABLE>; status =3D "disabled"; =20 ports { @@ -1392,6 +1394,7 @@ mipi_csi1: csi@30a70000 { fsl,mipi-phy-gpr =3D <&iomuxc_gpr 0x88>; interconnects =3D <&noc IMX8MQ_ICM_CSI1 &noc IMX8MQ_ICS_DRAM>; interconnect-names =3D "dram"; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_MIPI_CSI1_DISABLE>; status =3D "disabled"; =20 ports { @@ -1414,6 +1417,7 @@ csi1: csi@30a90000 { interrupts =3D ; clocks =3D <&clk IMX8MQ_CLK_CSI1_ROOT>; clock-names =3D "mclk"; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_MIPI_CSI1_DISABLE>; status =3D "disabled"; =20 port { @@ -1444,6 +1448,7 @@ mipi_csi2: csi@30b60000 { fsl,mipi-phy-gpr =3D <&iomuxc_gpr 0xa4>; interconnects =3D <&noc IMX8MQ_ICM_CSI2 &noc IMX8MQ_ICS_DRAM>; interconnect-names =3D "dram"; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_MIPI_CSI2_DISABLE>; status =3D "disabled"; =20 ports { @@ -1466,6 +1471,7 @@ csi2: csi@30b80000 { interrupts =3D ; clocks =3D <&clk IMX8MQ_CLK_CSI2_ROOT>; clock-names =3D "mclk"; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_MIPI_CSI2_DISABLE>; status =3D "disabled"; =20 port { @@ -1566,6 +1572,7 @@ fec1: ethernet@30be0000 { nvmem-cells =3D <&fec_mac_address>; nvmem-cell-names =3D "mac-address"; fsl,stop-mode =3D <&iomuxc_gpr 0x10 3>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_ENET_DISABLE>; status =3D "disabled"; }; }; @@ -1705,6 +1712,7 @@ gpu: gpu@38000000 { <&clk IMX8MQ_GPU_PLL>; assigned-clock-rates =3D <800000000>, <800000000>, <800000000>, <800000000>, <0>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_GPU_DISABLE>; power-domains =3D <&pgc_gpu>; }; =20 @@ -1725,6 +1733,7 @@ usb_dwc3_0: usb@38100000 { phy-names =3D "usb2-phy", "usb3-phy"; power-domains =3D <&pgc_otg1>; snps,parkmode-disable-ss-quirk; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_USB_OTG1_DISABLE>; status =3D "disabled"; }; =20 @@ -1757,6 +1766,7 @@ usb_dwc3_1: usb@38200000 { phy-names =3D "usb2-phy", "usb3-phy"; power-domains =3D <&pgc_otg2>; snps,parkmode-disable-ss-quirk; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_USB_OTG2_DISABLE>; status =3D "disabled"; }; =20 @@ -1778,6 +1788,7 @@ vpu_g1: video-codec@38300000 { interrupts =3D ; clocks =3D <&clk IMX8MQ_CLK_VPU_G1_ROOT>; power-domains =3D <&vpu_blk_ctrl IMX8MQ_VPUBLK_PD_G1>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_VPU_DISABLE>; }; =20 vpu_g2: video-codec@38310000 { @@ -1786,6 +1797,7 @@ vpu_g2: video-codec@38310000 { interrupts =3D ; clocks =3D <&clk IMX8MQ_CLK_VPU_G2_ROOT>; power-domains =3D <&vpu_blk_ctrl IMX8MQ_VPUBLK_PD_G2>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_VPU_DISABLE>; }; =20 vpu_blk_ctrl: blk-ctrl@38320000 { @@ -1839,6 +1851,7 @@ pcie0: pcie@33800000 { <&clk IMX8MQ_SYS1_PLL_80M>; assigned-clock-rates =3D <250000000>, <100000000>, <10000000>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_PCIE1_DISABLE>; status =3D "disabled"; }; =20 @@ -1882,6 +1895,7 @@ pcie1: pcie@33c00000 { <&clk IMX8MQ_SYS1_PLL_80M>; assigned-clock-rates =3D <250000000>, <100000000>, <10000000>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_PCIE2_DISABLE>; status =3D "disabled"; }; =20 @@ -1916,6 +1930,7 @@ pcie1_ep: pcie-ep@33c00000 { <10000000>; num-ib-windows =3D <4>; num-ob-windows =3D <4>; + access-controllers =3D <&ocotp IMX8MQ_OCOTP_PCIE2_DISABLE>; status =3D "disabled"; }; =20 --=20 2.34.1