diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/803-v5.13-0003-nvmem-brcm_nvram-new-driver-exposing-Broadcom-s-NVRA.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/803-v5.13-0003-nvmem-brcm_nvram-new-driver-exposing-Broadcom-s-NVRA.patch | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/803-v5.13-0003-nvmem-brcm_nvram-new-driver-exposing-Broadcom-s-NVRA.patch b/target/linux/generic/backport-5.10/803-v5.13-0003-nvmem-brcm_nvram-new-driver-exposing-Broadcom-s-NVRA.patch new file mode 100644 index 0000000000..17be01c14f --- /dev/null +++ b/target/linux/generic/backport-5.10/803-v5.13-0003-nvmem-brcm_nvram-new-driver-exposing-Broadcom-s-NVRA.patch @@ -0,0 +1,126 @@ +From 3fef9ed0627af30753a2404b8bd59d92cdb4c0ce Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Tue, 30 Mar 2021 12:12:36 +0100 +Subject: [PATCH] nvmem: brcm_nvram: new driver exposing Broadcom's NVRAM +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This driver provides access to Broadcom's NVRAM. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Link: https://lore.kernel.org/r/20210330111241.19401-6-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/nvmem/Kconfig | 9 +++++ + drivers/nvmem/Makefile | 2 + + drivers/nvmem/brcm_nvram.c | 78 ++++++++++++++++++++++++++++++++++++++ + 3 files changed, 89 insertions(+) + create mode 100644 drivers/nvmem/brcm_nvram.c + +--- a/drivers/nvmem/Kconfig ++++ b/drivers/nvmem/Kconfig +@@ -278,4 +278,13 @@ config NVMEM_RMEM + + This driver can also be built as a module. If so, the module + will be called nvmem-rmem. ++ ++config NVMEM_BRCM_NVRAM ++ tristate "Broadcom's NVRAM support" ++ depends on ARCH_BCM_5301X || COMPILE_TEST ++ depends on HAS_IOMEM ++ help ++ This driver provides support for Broadcom's NVRAM that can be accessed ++ using I/O mapping. ++ + endif +--- a/drivers/nvmem/Makefile ++++ b/drivers/nvmem/Makefile +@@ -57,3 +57,5 @@ obj-$(CONFIG_SPRD_EFUSE) += nvmem_sprd_e + nvmem_sprd_efuse-y := sprd-efuse.o + obj-$(CONFIG_NVMEM_RMEM) += nvmem-rmem.o + nvmem-rmem-y := rmem.o ++obj-$(CONFIG_NVMEM_BRCM_NVRAM) += nvmem_brcm_nvram.o ++nvmem_brcm_nvram-y := brcm_nvram.o +--- /dev/null ++++ b/drivers/nvmem/brcm_nvram.c +@@ -0,0 +1,78 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl> ++ */ ++ ++#include <linux/io.h> ++#include <linux/mod_devicetable.h> ++#include <linux/module.h> ++#include <linux/nvmem-provider.h> ++#include <linux/platform_device.h> ++ ++struct brcm_nvram { ++ struct device *dev; ++ void __iomem *base; ++}; ++ ++static int brcm_nvram_read(void *context, unsigned int offset, void *val, ++ size_t bytes) ++{ ++ struct brcm_nvram *priv = context; ++ u8 *dst = val; ++ ++ while (bytes--) ++ *dst++ = readb(priv->base + offset++); ++ ++ return 0; ++} ++ ++static int brcm_nvram_probe(struct platform_device *pdev) ++{ ++ struct nvmem_config config = { ++ .name = "brcm-nvram", ++ .reg_read = brcm_nvram_read, ++ }; ++ struct device *dev = &pdev->dev; ++ struct resource *res; ++ struct brcm_nvram *priv; ++ ++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ priv->dev = dev; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ priv->base = devm_ioremap_resource(dev, res); ++ if (IS_ERR(priv->base)) ++ return PTR_ERR(priv->base); ++ ++ config.dev = dev; ++ config.priv = priv; ++ config.size = resource_size(res); ++ ++ return PTR_ERR_OR_ZERO(devm_nvmem_register(dev, &config)); ++} ++ ++static const struct of_device_id brcm_nvram_of_match_table[] = { ++ { .compatible = "brcm,nvram", }, ++ {}, ++}; ++ ++static struct platform_driver brcm_nvram_driver = { ++ .probe = brcm_nvram_probe, ++ .driver = { ++ .name = "brcm_nvram", ++ .of_match_table = brcm_nvram_of_match_table, ++ }, ++}; ++ ++static int __init brcm_nvram_init(void) ++{ ++ return platform_driver_register(&brcm_nvram_driver); ++} ++ ++subsys_initcall_sync(brcm_nvram_init); ++ ++MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_LICENSE("GPL"); ++MODULE_DEVICE_TABLE(of, brcm_nvram_of_match_table); |