diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/813-v6.5-0010-nvmem-imx-support-i.MX93-OCOTP.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/813-v6.5-0010-nvmem-imx-support-i.MX93-OCOTP.patch | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/813-v6.5-0010-nvmem-imx-support-i.MX93-OCOTP.patch b/target/linux/generic/backport-5.15/813-v6.5-0010-nvmem-imx-support-i.MX93-OCOTP.patch new file mode 100644 index 0000000000..f8e6be4241 --- /dev/null +++ b/target/linux/generic/backport-5.15/813-v6.5-0010-nvmem-imx-support-i.MX93-OCOTP.patch @@ -0,0 +1,230 @@ +From 22e9e6fcfb5042cb6d6c7874c459b034800092f1 Mon Sep 17 00:00:00 2001 +From: Peng Fan <peng.fan@nxp.com> +Date: Sun, 11 Jun 2023 15:03:25 +0100 +Subject: [PATCH] nvmem: imx: support i.MX93 OCOTP + +Add i.MX93 OCOTP support. i.MX93 OCOTP has two parts: Fuse shadow +block(fsb) and fuse managed by ELE. The FSB part could be directly +accessed with MMIO, the ELE could only be accessed with ELE API. + +Currently the ELE API is not ready, so NULL function callback is used, +but it was tested with downstream ELE API. + +Signed-off-by: Peng Fan <peng.fan@nxp.com> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Message-ID: <20230611140330.154222-22-srinivas.kandagatla@linaro.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/nvmem/Kconfig | 9 ++ + drivers/nvmem/Makefile | 2 + + drivers/nvmem/imx-ocotp-ele.c | 175 ++++++++++++++++++++++++++++++++++ + 3 files changed, 186 insertions(+) + create mode 100644 drivers/nvmem/imx-ocotp-ele.c + +--- a/drivers/nvmem/Kconfig ++++ b/drivers/nvmem/Kconfig +@@ -83,6 +83,15 @@ config NVMEM_IMX_OCOTP + This driver can also be built as a module. If so, the module + will be called nvmem-imx-ocotp. + ++config NVMEM_IMX_OCOTP_ELE ++ tristate "i.MX On-Chip OTP Controller support" ++ depends on ARCH_MXC || COMPILE_TEST ++ depends on HAS_IOMEM ++ depends on OF ++ help ++ This is a driver for the On-Chip OTP Controller (OCOTP) ++ available on i.MX SoCs which has ELE. ++ + config NVMEM_IMX_OCOTP_SCU + tristate "i.MX8 SCU On-Chip OTP Controller support" + depends on IMX_SCU +--- a/drivers/nvmem/Makefile ++++ b/drivers/nvmem/Makefile +@@ -18,6 +18,8 @@ obj-$(CONFIG_NVMEM_IMX_IIM) += nvmem-im + nvmem-imx-iim-y := imx-iim.o + obj-$(CONFIG_NVMEM_IMX_OCOTP) += nvmem-imx-ocotp.o + nvmem-imx-ocotp-y := imx-ocotp.o ++obj-$(CONFIG_NVMEM_IMX_OCOTP_ELE) += nvmem-imx-ocotp-ele.o ++nvmem-imx-ocotp-ele-y := imx-ocotp-ele.o + obj-$(CONFIG_NVMEM_IMX_OCOTP_SCU) += nvmem-imx-ocotp-scu.o + nvmem-imx-ocotp-scu-y := imx-ocotp-scu.o + obj-$(CONFIG_NVMEM_JZ4780_EFUSE) += nvmem_jz4780_efuse.o +--- /dev/null ++++ b/drivers/nvmem/imx-ocotp-ele.c +@@ -0,0 +1,175 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * i.MX9 OCOTP fusebox driver ++ * ++ * Copyright 2023 NXP ++ */ ++ ++#include <linux/device.h> ++#include <linux/io.h> ++#include <linux/module.h> ++#include <linux/nvmem-provider.h> ++#include <linux/of_device.h> ++#include <linux/platform_device.h> ++#include <linux/slab.h> ++ ++enum fuse_type { ++ FUSE_FSB = 1, ++ FUSE_ELE = 2, ++ FUSE_INVALID = -1 ++}; ++ ++struct ocotp_map_entry { ++ u32 start; /* start word */ ++ u32 num; /* num words */ ++ enum fuse_type type; ++}; ++ ++struct ocotp_devtype_data { ++ u32 reg_off; ++ char *name; ++ u32 size; ++ u32 num_entry; ++ u32 flag; ++ nvmem_reg_read_t reg_read; ++ struct ocotp_map_entry entry[]; ++}; ++ ++struct imx_ocotp_priv { ++ struct device *dev; ++ void __iomem *base; ++ struct nvmem_config config; ++ struct mutex lock; ++ const struct ocotp_devtype_data *data; ++}; ++ ++static enum fuse_type imx_ocotp_fuse_type(void *context, u32 index) ++{ ++ struct imx_ocotp_priv *priv = context; ++ const struct ocotp_devtype_data *data = priv->data; ++ u32 start, end; ++ int i; ++ ++ for (i = 0; i < data->num_entry; i++) { ++ start = data->entry[i].start; ++ end = data->entry[i].start + data->entry[i].num; ++ ++ if (index >= start && index < end) ++ return data->entry[i].type; ++ } ++ ++ return FUSE_INVALID; ++} ++ ++static int imx_ocotp_reg_read(void *context, unsigned int offset, void *val, size_t bytes) ++{ ++ struct imx_ocotp_priv *priv = context; ++ void __iomem *reg = priv->base + priv->data->reg_off; ++ u32 count, index, num_bytes; ++ enum fuse_type type; ++ u32 *buf; ++ void *p; ++ int i; ++ ++ index = offset; ++ num_bytes = round_up(bytes, 4); ++ count = num_bytes >> 2; ++ ++ if (count > ((priv->data->size >> 2) - index)) ++ count = (priv->data->size >> 2) - index; ++ ++ p = kzalloc(num_bytes, GFP_KERNEL); ++ if (!p) ++ return -ENOMEM; ++ ++ mutex_lock(&priv->lock); ++ ++ buf = p; ++ ++ for (i = index; i < (index + count); i++) { ++ type = imx_ocotp_fuse_type(context, i); ++ if (type == FUSE_INVALID || type == FUSE_ELE) { ++ *buf++ = 0; ++ continue; ++ } ++ ++ *buf++ = readl_relaxed(reg + (i << 2)); ++ } ++ ++ memcpy(val, (u8 *)p, bytes); ++ ++ mutex_unlock(&priv->lock); ++ ++ kfree(p); ++ ++ return 0; ++}; ++ ++static int imx_ele_ocotp_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct imx_ocotp_priv *priv; ++ struct nvmem_device *nvmem; ++ ++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ priv->data = of_device_get_match_data(dev); ++ ++ priv->base = devm_platform_ioremap_resource(pdev, 0); ++ if (IS_ERR(priv->base)) ++ return PTR_ERR(priv->base); ++ ++ priv->config.dev = dev; ++ priv->config.name = "ELE-OCOTP"; ++ priv->config.id = NVMEM_DEVID_AUTO; ++ priv->config.owner = THIS_MODULE; ++ priv->config.size = priv->data->size; ++ priv->config.reg_read = priv->data->reg_read; ++ priv->config.word_size = 4; ++ priv->config.stride = 1; ++ priv->config.priv = priv; ++ priv->config.read_only = true; ++ mutex_init(&priv->lock); ++ ++ nvmem = devm_nvmem_register(dev, &priv->config); ++ if (IS_ERR(nvmem)) ++ return PTR_ERR(nvmem); ++ ++ return 0; ++} ++ ++static const struct ocotp_devtype_data imx93_ocotp_data = { ++ .reg_off = 0x8000, ++ .reg_read = imx_ocotp_reg_read, ++ .size = 2048, ++ .num_entry = 6, ++ .entry = { ++ { 0, 52, FUSE_FSB }, ++ { 63, 1, FUSE_ELE}, ++ { 128, 16, FUSE_ELE }, ++ { 182, 1, FUSE_ELE }, ++ { 188, 1, FUSE_ELE }, ++ { 312, 200, FUSE_FSB } ++ }, ++}; ++ ++static const struct of_device_id imx_ele_ocotp_dt_ids[] = { ++ { .compatible = "fsl,imx93-ocotp", .data = &imx93_ocotp_data, }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, imx_ele_ocotp_dt_ids); ++ ++static struct platform_driver imx_ele_ocotp_driver = { ++ .driver = { ++ .name = "imx_ele_ocotp", ++ .of_match_table = imx_ele_ocotp_dt_ids, ++ }, ++ .probe = imx_ele_ocotp_probe, ++}; ++module_platform_driver(imx_ele_ocotp_driver); ++ ++MODULE_DESCRIPTION("i.MX OCOTP/ELE driver"); ++MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>"); ++MODULE_LICENSE("GPL"); |