From 9c9a3c27b96e057f3c3f47151d7a170d84e3bb5f Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Sun, 15 Oct 2023 15:31:47 +0200 Subject: [PATCH 4/5] wifi: rt2x00: Support EEPROM swap binding Add binding "ralink,eeprom-swap" to swap bytes of EEPROM before using it. Signed-off-by: Christian Marangi --- drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) --- a/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c @@ -20,6 +20,19 @@ #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; + size_t len = rt2x00dev->ops->eeprom_size; + int i; + + if (!of_find_property(np, "ralink,eeprom-swap", NULL)) + return; + + for (i = 0; i < len / sizeof(u16); i++) + rt2x00dev->eeprom[i] = swab16(rt2x00dev->eeprom[i]); +} + static int rt2800lib_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev) { int ret = -EINVAL; @@ -66,6 +79,8 @@ static int rt2800lib_read_eeprom_mtd(str return ret; } + rt2800lib_eeprom_swap(rt2x00dev); + dev_info(rt2x00dev->dev, "loaded eeprom from mtd device \"%s\"\n", part); #endif