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authorRafał Miłecki <rafal@milecki.pl>2021-03-10 22:28:30 +0100
committerRafał Miłecki <rafal@milecki.pl>2021-03-10 22:29:15 +0100
commitaf8a49a4becd3240a1fac31faea9f76469aff1a1 (patch)
tree545c2b5b3881b7d2c3867c9d910a5fa9caa7bd22 /target/linux/bcm53xx/patches-5.4
parent0ef3c58ac83397dcc81ad739ffe09702bc7f58ff (diff)
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Revert "bcm53xx: add support for reading NVRAM based on DT mapping"
This reverts commit b0376462c164344d6be9fe1568a9f13ffd8fbb16. Those changes were rejected and were replaced with an NVMEM driver. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/bcm53xx/patches-5.4')
-rw-r--r--target/linux/bcm53xx/patches-5.4/181-0001-dt-bindings-firmware-add-Broadcom-s-NVRAM-memory-map.patch56
-rw-r--r--target/linux/bcm53xx/patches-5.4/181-0002-firmware-bcm47xx_nvram-support-platform-device-brcm-.patch85
2 files changed, 0 insertions, 141 deletions
diff --git a/target/linux/bcm53xx/patches-5.4/181-0001-dt-bindings-firmware-add-Broadcom-s-NVRAM-memory-map.patch b/target/linux/bcm53xx/patches-5.4/181-0001-dt-bindings-firmware-add-Broadcom-s-NVRAM-memory-map.patch
deleted file mode 100644
index 1b0598777c..0000000000
--- a/target/linux/bcm53xx/patches-5.4/181-0001-dt-bindings-firmware-add-Broadcom-s-NVRAM-memory-map.patch
+++ /dev/null
@@ -1,56 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
-Date: Tue, 2 Mar 2021 08:23:35 +0100
-Subject: [PATCH] dt-bindings: firmware: add Broadcom's NVRAM memory mapping
-
-NVRAM structure contains device data and can be accessed using MMIO.
-
-Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
----
- .../bindings/firmware/brcm,nvram.yaml | 41 +++++++++++++++++++
- 1 file changed, 41 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/firmware/brcm,nvram.yaml
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml
-@@ -0,0 +1,41 @@
-+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-+%YAML 1.2
-+---
-+$id: "http://devicetree.org/schemas/firmware/brcm,nvram.yaml#"
-+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
-+
-+title: Broadcom's NVRAM
-+
-+maintainers:
-+ - Rafał Miłecki <rafal@milecki.pl>
-+
-+description: |
-+ NVRAM is a structure containing device specific environment variables.
-+ It is used for storing device configuration, booting parameters and
-+ calibration data.
-+
-+ It's required very early in booting process and so is made available
-+ using memory mapping.
-+
-+ NVRAM can be found on Broadcom BCM47xx MIPS, Northstar ARM Cortex-A9
-+ and some more devices.
-+
-+properties:
-+ compatible:
-+ const: brcm,nvram
-+
-+ reg:
-+ description: memory region with NVRAM data
-+ maxItems: 1
-+
-+required:
-+ - reg
-+
-+additionalProperties: false
-+
-+examples:
-+ - |
-+ nvram@1e000000 {
-+ compatible = "brcm,nvram";
-+ reg = <0x1e000000 0x10000>;
-+ };
diff --git a/target/linux/bcm53xx/patches-5.4/181-0002-firmware-bcm47xx_nvram-support-platform-device-brcm-.patch b/target/linux/bcm53xx/patches-5.4/181-0002-firmware-bcm47xx_nvram-support-platform-device-brcm-.patch
deleted file mode 100644
index c1dea1f26b..0000000000
--- a/target/linux/bcm53xx/patches-5.4/181-0002-firmware-bcm47xx_nvram-support-platform-device-brcm-.patch
+++ /dev/null
@@ -1,85 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
-Date: Tue, 2 Mar 2021 08:33:13 +0100
-Subject: [PATCH] firmware: bcm47xx_nvram: support platform device "brcm,nvram"
-
-Add support for platform device providing mapping resource. This allows
-reading NVRAM based on DT mapping binding. It's required for devices
-that boot depending on NVRAM stored setup and provides early access to
-NVRAM data.
-
-Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
----
- drivers/firmware/broadcom/bcm47xx_nvram.c | 55 +++++++++++++++++++++++
- 1 file changed, 55 insertions(+)
-
---- a/drivers/firmware/broadcom/bcm47xx_nvram.c
-+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
-@@ -13,6 +13,7 @@
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/mtd/mtd.h>
-+#include <linux/platform_device.h>
- #include <linux/bcm47xx_nvram.h>
-
- #define NVRAM_MAGIC 0x48534C46 /* 'FLSH' */
-@@ -162,6 +163,60 @@ static int nvram_init(void)
- return -ENXIO;
- }
-
-+static int brcm_nvram_probe(struct platform_device *pdev)
-+{
-+ struct nvram_header __iomem *header;
-+ struct device *dev = &pdev->dev;
-+ struct resource *res;
-+ void __iomem *mmio;
-+ size_t copy_len;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ if (!res) {
-+ dev_err(dev, "Failed to get resource\n");
-+ return -ENODEV;
-+ }
-+
-+ mmio = ioremap(res->start, resource_size(res));
-+ if (!mmio)
-+ return -ENOMEM;
-+
-+ header = (struct nvram_header *)mmio;
-+ copy_len = DIV_ROUND_UP(sizeof(*header) + header->len, 4);
-+ if (header->magic != NVRAM_MAGIC) {
-+ dev_err(dev, "No NVRAM found at %pR\n", res);
-+ return -EPROTO;
-+ } else if (copy_len > resource_size(res)) {
-+ dev_err(dev, "NVRAM size exceeds %pR\n", res);
-+ return -ERANGE;
-+ } else if (copy_len >= NVRAM_SPACE) {
-+ dev_err(dev, "NVRAM size exceeds buffer size %d\n", NVRAM_SPACE);
-+ return -ENOMEM;
-+ }
-+
-+ __ioread32_copy(nvram_buf, mmio, copy_len);
-+ nvram_buf[NVRAM_SPACE - 1] = '\0';
-+
-+ iounmap(mmio);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id brcm_nvram_of_match[] = {
-+ { .compatible = "brcm,nvram "},
-+ {},
-+};
-+
-+static struct platform_driver brcm_nvram_driver = {
-+ .driver = {
-+ .name = "brcm_nvram",
-+ .of_match_table = brcm_nvram_of_match,
-+ },
-+ .probe = brcm_nvram_probe,
-+};
-+
-+module_platform_driver(brcm_nvram_driver);
-+
- int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
- {
- char *var, *value, *end, *eq;