diff options
| author | Rafał Miłecki | 2025-07-31 08:25:52 +0000 |
|---|---|---|
| committer | Rafał Miłecki | 2025-07-31 08:31:52 +0000 |
| commit | 78e4cffcd882389cb8f0bf818303f85f8d1e9c8e (patch) | |
| tree | 0175ab138a219a87edd2dccd399e3c74098bb9e2 | |
| parent | 4a1d8ef55cbf247f06dae8e958eb8eb42f1882a5 (diff) | |
| download | openwrt-78e4cffcd882389cb8f0bf818303f85f8d1e9c8e.tar.gz | |
bcm53xx: add Tenda AC9 switch workaroundopenwrt-21.02
This fixes regressed support for Tenda AC9 which got broken somewhere
between LEDE 17.01 and OpenWrt 18.06.
At some point bcm47xx_nvram_gpio_pin() started working on bcm53xx
devices and it resulted in swconfig b53 performing GPIO-based switch
reset. It exposed some bug as switch stopped working.
The problem is most likely to be some missing initialization step. Tenda
AC9 comes with BCM53125 rev 4 (pretty common chip) but apparently needs
some extra quirk.
As a workaround (it doesn't make much sense to debug swconfig driver
which has a working DSA replacement) simply avoid full switch reset.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
| -rw-r--r-- | target/linux/bcm53xx/patches-5.4/701-b53-add-Tenda-AC9-switch-reset-workaround.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-5.4/701-b53-add-Tenda-AC9-switch-reset-workaround.patch b/target/linux/bcm53xx/patches-5.4/701-b53-add-Tenda-AC9-switch-reset-workaround.patch new file mode 100644 index 0000000000..1b4cf5f85a --- /dev/null +++ b/target/linux/bcm53xx/patches-5.4/701-b53-add-Tenda-AC9-switch-reset-workaround.patch @@ -0,0 +1,39 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Wed, 30 Jul 2025 12:37:12 +0000 +Subject: [PATCH] b53: add Tenda AC9 switch reset workaround +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Avoid switch reset to keep it in a working state. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +--- + drivers/net/phy/b53/b53_priv.h | 9 +++++++++ + 1 file changed, 9 insertions(+) + +--- a/drivers/net/phy/b53/b53_priv.h ++++ b/drivers/net/phy/b53/b53_priv.h +@@ -21,6 +21,7 @@ + + #include <linux/kernel.h> + #include <linux/mutex.h> ++#include <linux/of.h> + #include <linux/switch.h> + + struct b53_device; +@@ -318,6 +319,14 @@ static inline int b53_write64(struct b53 + + static inline int b53_switch_get_reset_gpio(struct b53_device *dev) + { ++ /* ++ * Tenda AC9 comes with gpio2=robo_reset but performing switch reset ++ * leaves it in a non-working state. It seems b53 swconfig driver misses ++ * some initialization bit. ++ */ ++ if (of_machine_is_compatible("tenda,ac9")) ++ return -ENOENT; ++ + #ifdef CONFIG_BCM47XX + enum bcm47xx_board board = bcm47xx_board_get(); + |