81 lines
3 KiB
Diff
81 lines
3 KiB
Diff
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@nbd.name>
|
|
* 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:
|