powerpc: Update Warp to use leds-gpio driver
Now that leds-gpio is a proper OF platform driver, the Warp can use the leds-gpio driver rather than the old out-of-kernel driver. One side-effect is the leds-gpio driver always turns the leds off while the old driver left them alone. So we have to set them back to the correct settings. Signed-off-by: Sean MacLennan <smaclennan@pikatech.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Sean MacLennan
Benjamin Herrenschmidt
Родитель
54c181935d
Коммит
805e324b7f
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@ -1,7 +1,7 @@
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/*
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* Device Tree Source for PIKA Warp
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*
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* Copyright (c) 2008 PIKA Technologies
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* Copyright (c) 2008-2009 PIKA Technologies
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* Sean MacLennan <smaclennan@pikatech.com>
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*
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* This file is licensed under the terms of the GNU General Public
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@ -158,7 +158,7 @@
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partition@0 {
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label = "splash";
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reg = <0x00000000 0x00020000>;
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reg = <0x00000000 0x00010000>;
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};
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partition@300000 {
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label = "fpga";
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@ -244,28 +244,27 @@
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};
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GPIO0: gpio@ef600b00 {
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compatible = "ibm,gpio-440ep";
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compatible = "ibm,ppc4xx-gpio";
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reg = <0xef600b00 0x00000048>;
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#gpio-cells = <2>;
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gpio-controller;
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};
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GPIO1: gpio@ef600c00 {
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compatible = "ibm,gpio-440ep";
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compatible = "ibm,ppc4xx-gpio";
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reg = <0xef600c00 0x00000048>;
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#gpio-cells = <2>;
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gpio-controller;
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};
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led@31 {
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compatible = "linux,gpio-led";
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linux,name = ":green:";
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gpios = <&GPIO1 31 0>;
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power-leds {
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compatible = "gpio-leds";
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green {
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gpios = <&GPIO1 0 0>;
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default-state = "on";
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};
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led@30 {
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compatible = "linux,gpio-led";
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linux,name = ":red:";
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gpios = <&GPIO1 30 0>;
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red {
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gpios = <&GPIO1 1 0>;
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};
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};
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@ -1,7 +1,7 @@
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/*
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* PIKA Warp(tm) board specific routines
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*
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* Copyright (c) 2008 PIKA Technologies
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* Copyright (c) 2008-2009 PIKA Technologies
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* Sean MacLennan <smaclennan@pikatech.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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@ -15,6 +15,7 @@
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/of_gpio.h>
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#include <asm/machdep.h>
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#include <asm/prom.h>
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@ -23,6 +24,7 @@
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#include <asm/uic.h>
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#include <asm/ppc4xx.h>
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static __initdata struct of_device_id warp_of_bus[] = {
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{ .compatible = "ibm,plb4", },
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{ .compatible = "ibm,opb", },
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@ -55,6 +57,8 @@ define_machine(warp) {
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};
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static u32 post_info;
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/* I am not sure this is the best place for this... */
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static int __init warp_post_info(void)
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{
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@ -77,21 +81,21 @@ static int __init warp_post_info(void)
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iounmap(fpga);
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if (post1 || post2)
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if (post1 || post2) {
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printk(KERN_INFO "Warp POST %08x %08x\n", post1, post2);
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else
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post_info = 1;
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} else
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printk(KERN_INFO "Warp POST OK\n");
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return 0;
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}
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machine_late_initcall(warp, warp_post_info);
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#ifdef CONFIG_SENSORS_AD7414
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static LIST_HEAD(dtm_shutdown_list);
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static void __iomem *dtm_fpga;
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static void __iomem *gpio_base;
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static unsigned green_led, red_led;
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struct dtm_shutdown {
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@ -134,14 +138,17 @@ int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
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static irqreturn_t temp_isr(int irq, void *context)
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{
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struct dtm_shutdown *shutdown;
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int value = 1;
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local_irq_disable();
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gpio_set_value(green_led, 0);
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/* Run through the shutdown list. */
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list_for_each_entry(shutdown, &dtm_shutdown_list, list)
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shutdown->func(shutdown->arg);
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printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n");
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printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n\n");
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while (1) {
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if (dtm_fpga) {
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@ -149,52 +156,34 @@ static irqreturn_t temp_isr(int irq, void *context)
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out_be32(dtm_fpga + 0x14, reset);
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}
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if (gpio_base) {
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unsigned leds = in_be32(gpio_base);
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/* green off, red toggle */
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leds &= ~0x80000000;
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leds ^= 0x40000000;
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out_be32(gpio_base, leds);
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}
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gpio_set_value(red_led, value);
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value ^= 1;
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mdelay(500);
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}
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}
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static int pika_setup_leds(void)
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{
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struct device_node *np;
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const u32 *gpios;
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int len;
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struct device_node *np, *child;
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np = of_find_compatible_node(NULL, NULL, "linux,gpio-led");
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np = of_find_compatible_node(NULL, NULL, "gpio-leds");
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if (!np) {
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printk(KERN_ERR __FILE__ ": Unable to find gpio-led\n");
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printk(KERN_ERR __FILE__ ": Unable to find leds\n");
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return -ENOENT;
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}
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gpios = of_get_property(np, "gpios", &len);
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for_each_child_of_node(np, child)
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if (strcmp(child->name, "green") == 0) {
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green_led = of_get_gpio(child, 0);
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/* Turn back on the green LED */
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gpio_set_value(green_led, 1);
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} else if (strcmp(child->name, "red") == 0) {
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red_led = of_get_gpio(child, 0);
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/* Set based on post */
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gpio_set_value(red_led, post_info);
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}
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of_node_put(np);
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if (!gpios || len < 4) {
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printk(KERN_ERR __FILE__
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": Unable to get gpios property (%d)\n", len);
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return -ENOENT;
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}
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np = of_find_node_by_phandle(gpios[0]);
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if (!np) {
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printk(KERN_ERR __FILE__ ": Unable to find gpio\n");
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return -ENOENT;
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}
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gpio_base = of_iomap(np, 0);
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of_node_put(np);
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if (!gpio_base) {
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printk(KERN_ERR __FILE__ ": Unable to map gpio");
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return -ENOMEM;
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}
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return 0;
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}
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@ -270,10 +259,10 @@ static int pika_dtm_thread(void __iomem *fpga)
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}
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found_it:
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i2c_put_adapter(adap);
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pika_setup_critical_temp(client);
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i2c_put_adapter(adap);
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printk(KERN_INFO "PIKA DTM thread running.\n");
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while (!kthread_should_stop()) {
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@ -311,6 +300,9 @@ static int __init pika_dtm_start(void)
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if (dtm_fpga == NULL)
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return -ENOENT;
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/* Must get post info before thread starts. */
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warp_post_info();
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dtm_thread = kthread_run(pika_dtm_thread, dtm_fpga, "pika-dtm");
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if (IS_ERR(dtm_thread)) {
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iounmap(dtm_fpga);
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@ -333,6 +325,8 @@ int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
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return 0;
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}
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machine_late_initcall(warp, warp_post_info);
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#endif
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EXPORT_SYMBOL(pika_dtm_register_shutdown);
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