diff options
| -rw-r--r-- | target/linux/ramips/patches-4.4/0518-net-mediatek-get-rt3050-ethernet-ports-to-be-disable.patch | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0518-net-mediatek-get-rt3050-ethernet-ports-to-be-disable.patch b/target/linux/ramips/patches-4.4/0518-net-mediatek-get-rt3050-ethernet-ports-to-be-disable.patch new file mode 100644 index 0000000000..f5defe1fbd --- /dev/null +++ b/target/linux/ramips/patches-4.4/0518-net-mediatek-get-rt3050-ethernet-ports-to-be-disable.patch @@ -0,0 +1,81 @@ +From: Vittorio Gambaletta <openwrt@vittgam.net> +Date: Fri, 01 Jan 2016 00:00:02 +0100 +Subject: [PATCH 3/3] net: mediatek: Get rt3050 ethernet ports to be disabled from the device tree. + +This patch allows configuring ports to be disabled in the device tree; this +saves power, since disabling ports here actually disables power to ethernet +PHYs. + +Line 444 enables all ethernet ports, so line 487 is getting zero ports to be +disabled, except for port 5 in SoCs where this is not implemented as it will +be sticky disabled in register POC0. Because of this, the code will still read +the switch configuration and OR it to the device tree setting. + +Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net> +--- + +--- a/drivers/net/ethernet/mediatek/esw_rt3050.c ++++ b/drivers/net/ethernet/mediatek/esw_rt3050.c +@@ -10,6 +10,7 @@ + * Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org> + * Copyright (C) 2009-2015 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com> ++ * Copyright (C) 2016 Vittorio Gambaletta <openwrt@vittgam.net> + */ + + #include <linux/module.h> +@@ -219,6 +220,7 @@ struct rt305x_esw { + spinlock_t reg_rw_lock; + + unsigned char port_map; ++ unsigned char port_disable; + unsigned int reg_led_polarity; + + struct switch_dev swdev; +@@ -483,8 +485,14 @@ static void esw_hw_init(struct rt305x_es + esw_w32(esw, 0x00000005, RT305X_ESW_REG_P3LED); + esw_w32(esw, 0x00000005, RT305X_ESW_REG_P4LED); + +- /* Copy disabled port configuration from bootloader setup */ +- port_disable = esw_get_port_disable(esw); ++ /* Copy disabled port configuration from device tree setup */ ++ port_disable = esw->port_disable; ++ ++ /* Disable nonexistent ports by reading the switch config ++ * after having enabled all possible ports above ++ */ ++ port_disable |= esw_get_port_disable(esw); ++ + for (i = 0; i < 6; i++) + esw->ports[i].disable = (port_disable & (1 << i)) != 0; + +@@ -1330,7 +1338,7 @@ static int esw_probe(struct platform_dev + { + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct device_node *np = pdev->dev.of_node; +- const __be32 *port_map, *reg_init; ++ const __be32 *port_map, *port_disable, *reg_init; + struct switch_dev *swdev; + struct rt305x_esw *esw; + int ret; +@@ -1349,6 +1357,10 @@ static int esw_probe(struct platform_dev + if (port_map) + esw->port_map = be32_to_cpu(*port_map); + ++ port_disable = of_get_property(np, "mediatek,portdisable", NULL); ++ if (port_disable) ++ esw->port_disable = be32_to_cpu(*port_disable); ++ + reg_init = of_get_property(np, "mediatek,led_polarity", NULL); + if (reg_init) + esw->reg_led_polarity = be32_to_cpu(*reg_init); +--- a/Documentation/devicetree/bindings/net/ralink,rt3050-esw.txt ++++ b/Documentation/devicetree/bindings/net/ralink,rt3050-esw.txt +@@ -16,6 +16,7 @@ Required properties: + Optional properties: + - mediatek,portmap: can be used to choose if the default switch setup is + llllw or wllll ++- mediatek,portdisable: disable unused ethernet PHYs to save power + - mediatek,led_polarity: override the active high/low settings of the leds + + Example: |