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Diffstat (limited to 'arch/powerpc/platforms/44x/warp.c')
-rw-r--r--arch/powerpc/platforms/44x/warp.c115
1 files changed, 47 insertions, 68 deletions
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index 960edf8..e5c1b09 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -1,7 +1,7 @@
/*
* PIKA Warp(tm) board specific routines
*
- * Copyright (c) 2008 PIKA Technologies
+ * Copyright (c) 2008-2009 PIKA Technologies
* Sean MacLennan <smaclennan@pikatech.com>
*
* This program is free software; you can redistribute it and/or modify it
@@ -15,6 +15,8 @@
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
+#include <linux/of_gpio.h>
+#include <linux/of_i2c.h>
#include <asm/machdep.h>
#include <asm/prom.h>
@@ -23,6 +25,7 @@
#include <asm/uic.h>
#include <asm/ppc4xx.h>
+
static __initdata struct of_device_id warp_of_bus[] = {
{ .compatible = "ibm,plb4", },
{ .compatible = "ibm,opb", },
@@ -41,7 +44,13 @@ static int __init warp_probe(void)
{
unsigned long root = of_get_flat_dt_root();
- return of_flat_dt_is_compatible(root, "pika,warp");
+ if (!of_flat_dt_is_compatible(root, "pika,warp"))
+ return 0;
+
+ /* For __dma_alloc_coherent */
+ ISA_DMA_THRESHOLD = ~0L;
+
+ return 1;
}
define_machine(warp) {
@@ -55,7 +64,6 @@ define_machine(warp) {
};
-/* I am not sure this is the best place for this... */
static int __init warp_post_info(void)
{
struct device_node *np;
@@ -84,14 +92,13 @@ static int __init warp_post_info(void)
return 0;
}
-machine_late_initcall(warp, warp_post_info);
#ifdef CONFIG_SENSORS_AD7414
static LIST_HEAD(dtm_shutdown_list);
static void __iomem *dtm_fpga;
-static void __iomem *gpio_base;
+static unsigned green_led, red_led;
struct dtm_shutdown {
@@ -134,14 +141,17 @@ int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
static irqreturn_t temp_isr(int irq, void *context)
{
struct dtm_shutdown *shutdown;
+ int value = 1;
local_irq_disable();
+ gpio_set_value(green_led, 0);
+
/* Run through the shutdown list. */
list_for_each_entry(shutdown, &dtm_shutdown_list, list)
shutdown->func(shutdown->arg);
- printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n");
+ printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n\n");
while (1) {
if (dtm_fpga) {
@@ -149,59 +159,39 @@ static irqreturn_t temp_isr(int irq, void *context)
out_be32(dtm_fpga + 0x14, reset);
}
- if (gpio_base) {
- unsigned leds = in_be32(gpio_base);
-
- /* green off, red toggle */
- leds &= ~0x80000000;
- leds ^= 0x40000000;
-
- out_be32(gpio_base, leds);
- }
-
+ gpio_set_value(red_led, value);
+ value ^= 1;
mdelay(500);
}
+
+ /* Not reached */
+ return IRQ_HANDLED;
}
static int pika_setup_leds(void)
{
- struct device_node *np;
- const u32 *gpios;
- int len;
+ struct device_node *np, *child;
- np = of_find_compatible_node(NULL, NULL, "linux,gpio-led");
+ np = of_find_compatible_node(NULL, NULL, "gpio-leds");
if (!np) {
- printk(KERN_ERR __FILE__ ": Unable to find gpio-led\n");
+ printk(KERN_ERR __FILE__ ": Unable to find leds\n");
return -ENOENT;
}
- gpios = of_get_property(np, "gpios", &len);
- of_node_put(np);
- if (!gpios || len < 4) {
- printk(KERN_ERR __FILE__
- ": Unable to get gpios property (%d)\n", len);
- return -ENOENT;
- }
+ for_each_child_of_node(np, child)
+ if (strcmp(child->name, "green") == 0)
+ green_led = of_get_gpio(child, 0);
+ else if (strcmp(child->name, "red") == 0)
+ red_led = of_get_gpio(child, 0);
- np = of_find_node_by_phandle(gpios[0]);
- if (!np) {
- printk(KERN_ERR __FILE__ ": Unable to find gpio\n");
- return -ENOENT;
- }
-
- gpio_base = of_iomap(np, 0);
of_node_put(np);
- if (!gpio_base) {
- printk(KERN_ERR __FILE__ ": Unable to map gpio");
- return -ENOMEM;
- }
return 0;
}
-static void pika_setup_critical_temp(struct i2c_client *client)
+static void pika_setup_critical_temp(struct device_node *np,
+ struct i2c_client *client)
{
- struct device_node *np;
int irq, rc;
/* Do this before enabling critical temp interrupt since we
@@ -213,14 +203,7 @@ static void pika_setup_critical_temp(struct i2c_client *client)
i2c_smbus_write_byte_data(client, 2, 65); /* Thigh */
i2c_smbus_write_byte_data(client, 3, 0); /* Tlow */
- np = of_find_compatible_node(NULL, NULL, "adi,ad7414");
- if (np == NULL) {
- printk(KERN_ERR __FILE__ ": Unable to find ad7414\n");
- return;
- }
-
irq = irq_of_parse_and_map(np, 0);
- of_node_put(np);
if (irq == NO_IRQ) {
printk(KERN_ERR __FILE__ ": Unable to get ad7414 irq\n");
return;
@@ -249,32 +232,24 @@ static inline void pika_dtm_check_fan(void __iomem *fpga)
static int pika_dtm_thread(void __iomem *fpga)
{
- struct i2c_adapter *adap;
+ struct device_node *np;
struct i2c_client *client;
- /* We loop in case either driver was compiled as a module and
- * has not been insmoded yet.
- */
- while (!(adap = i2c_get_adapter(0))) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ);
- }
-
- while (1) {
- list_for_each_entry(client, &adap->clients, list)
- if (client->addr == 0x4a)
- goto found_it;
+ np = of_find_compatible_node(NULL, NULL, "adi,ad7414");
+ if (np == NULL)
+ return -ENOENT;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ);
+ client = of_find_i2c_device_by_node(np);
+ if (client == NULL) {
+ of_node_put(np);
+ return -ENOENT;
}
-found_it:
- i2c_put_adapter(adap);
+ pika_setup_critical_temp(np, client);
- pika_setup_critical_temp(client);
+ of_node_put(np);
- printk(KERN_INFO "PIKA DTM thread running.\n");
+ printk(KERN_INFO "Warp DTM thread running.\n");
while (!kthread_should_stop()) {
int val;
@@ -296,7 +271,6 @@ found_it:
return 0;
}
-
static int __init pika_dtm_start(void)
{
struct task_struct *dtm_thread;
@@ -311,6 +285,9 @@ static int __init pika_dtm_start(void)
if (dtm_fpga == NULL)
return -ENOENT;
+ /* Must get post info before thread starts. */
+ warp_post_info();
+
dtm_thread = kthread_run(pika_dtm_thread, dtm_fpga, "pika-dtm");
if (IS_ERR(dtm_thread)) {
iounmap(dtm_fpga);
@@ -333,6 +310,8 @@ int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
return 0;
}
+machine_late_initcall(warp, warp_post_info);
+
#endif
EXPORT_SYMBOL(pika_dtm_register_shutdown);
generated by cgit v0.10.2 at 2024-08-21 14:10:30 (GMT)