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