diff options
Diffstat (limited to 'package/kernel/mac80211/patches/rt2x00/602-05-wifi-rt2x00-support-loading-eeprom-from-NVMEM-cells.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/rt2x00/602-05-wifi-rt2x00-support-loading-eeprom-from-NVMEM-cells.patch | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/rt2x00/602-05-wifi-rt2x00-support-loading-eeprom-from-NVMEM-cells.patch b/package/kernel/mac80211/patches/rt2x00/602-05-wifi-rt2x00-support-loading-eeprom-from-NVMEM-cells.patch new file mode 100644 index 00000000000..e6633363bd3 --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/602-05-wifi-rt2x00-support-loading-eeprom-from-NVMEM-cells.patch @@ -0,0 +1,97 @@ +From 9008cdacdc41f8233f4444b86cf3a17201686e2d Mon Sep 17 00:00:00 2001 +From: Shiji Yang <yangshiji66@outlook.com> +Date: Tue, 18 Jul 2023 20:18:16 +0800 +Subject: [PATCH 5/5] wifi: rt2x00: support loading eeprom from NVMEM cells + +This patch allows rt2x00 to load eeprom from "eeprom" NVMEM cell. + +Example: + +/* load eeprom from NVMEM provider 'eep' */ +&wmac { + nvmem-cells = <&eep>; + nvmem-cell-names = "eeprom"; +}; + +Signed-off-by: Shiji Yang <yangshiji66@outlook.com> +Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> +--- + .../net/wireless/ralink/rt2x00/rt2x00eeprom.c | 41 ++++++++++++++++++- + 1 file changed, 40 insertions(+), 1 deletion(-) + +--- a/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c +@@ -14,12 +14,12 @@ + #include <linux/mtd/mtd.h> + #include <linux/mtd/partitions.h> + #endif ++#include <linux/nvmem-consumer.h> + #include <linux/of.h> + + #include "rt2x00.h" + #include "rt2x00soc.h" + +-#if IS_ENABLED(CONFIG_MTD) + static void rt2800lib_eeprom_swap(struct rt2x00_dev *rt2x00dev) + { + struct device_node *np = rt2x00dev->dev->of_node; +@@ -33,6 +33,7 @@ static void rt2800lib_eeprom_swap(struct + rt2x00dev->eeprom[i] = swab16(rt2x00dev->eeprom[i]); + } + ++#if IS_ENABLED(CONFIG_MTD) + static int rt2800lib_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev) + { + int ret = -EINVAL; +@@ -88,6 +89,40 @@ static int rt2800lib_read_eeprom_mtd(str + } + #endif + ++static int rt2800lib_read_eeprom_nvmem(struct rt2x00_dev *rt2x00dev) ++{ ++ struct device_node *np = rt2x00dev->dev->of_node; ++ unsigned int len = rt2x00dev->ops->eeprom_size; ++ struct nvmem_cell *cell; ++ const void *data; ++ size_t retlen; ++ int ret = 0; ++ ++ cell = of_nvmem_cell_get(np, "eeprom"); ++ if (IS_ERR(cell)) ++ return PTR_ERR(cell); ++ ++ data = nvmem_cell_read(cell, &retlen); ++ nvmem_cell_put(cell); ++ ++ if (IS_ERR(data)) ++ return PTR_ERR(data); ++ ++ if (retlen != len) { ++ dev_err(rt2x00dev->dev, "invalid eeprom size, required: 0x%04x\n", len); ++ ret = -EINVAL; ++ goto exit; ++ } ++ ++ memcpy(rt2x00dev->eeprom, data, len); ++ ++ rt2800lib_eeprom_swap(rt2x00dev); ++ ++exit: ++ kfree(data); ++ return ret; ++} ++ + static const char * + rt2x00lib_get_eeprom_file_name(struct rt2x00_dev *rt2x00dev) + { +@@ -164,6 +199,10 @@ int rt2x00lib_read_eeprom(struct rt2x00_ + return 0; + #endif + ++ ret = rt2800lib_read_eeprom_nvmem(rt2x00dev); ++ if (!ret) ++ return 0; ++ + return rt2x00lib_read_eeprom_file(rt2x00dev); + } + EXPORT_SYMBOL_GPL(rt2x00lib_read_eeprom); |