提交 8c68e2f7 编写于 作者: A Anton Vorontsov 提交者: Kumar Gala

powerpc/86xx: Add power management support for MPC8610HPCD boards

This patch adds needed nodes and properties to support suspend/resume
on the MPC8610HPCD boards.

There is a dedicated switch (SW9) that is used to wake up the boards.
By default the SW9 button is routed to IRQ8, but could be re-routed
(via PIXIS) to sreset.

With 'no_console_suspend' kernel command line argument specified, the
board is also able to wakeup upon serial port input.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Scott Wood <scottwood@freescale.com> [dts]
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
上级 3cfee0aa
......@@ -20,12 +20,16 @@ Required properities:
- compatible : should be "fsl,fpga-pixis".
- reg : should contain the address and the length of the FPPGA register
set.
- interrupt-parent: should specify phandle for the interrupt controller.
- interrupts : should specify event (wakeup) IRQ.
Example (MPC8610HPCD):
board-control@e8000000 {
compatible = "fsl,fpga-pixis";
reg = <0xe8000000 32>;
interrupt-parent = <&mpic>;
interrupts = <8 8>;
};
* Freescale BCSR GPIO banks
......
......@@ -35,6 +35,8 @@
i-cache-line-size = <32>;
d-cache-size = <32768>; // L1
i-cache-size = <32768>; // L1
sleep = <&pmc 0x00008000 0 // core
&pmc 0x00004000 0>; // timebase
timebase-frequency = <0>; // From uboot
bus-frequency = <0>; // From uboot
clock-frequency = <0>; // From uboot
......@@ -60,6 +62,7 @@
5 0 0xe8480000 0x00008000
6 0 0xe84c0000 0x00008000
3 0 0xe8000000 0x00000020>;
sleep = <&pmc 0x08000000 0>;
flash@0,0 {
compatible = "cfi-flash";
......@@ -105,6 +108,8 @@
compatible = "fsl,fpga-pixis";
reg = <3 0 0x20>;
ranges = <0 3 0 0x20>;
interrupt-parent = <&mpic>;
interrupts = <8 8>;
sdcsr_pio: gpio-controller@a {
#gpio-cells = <2>;
......@@ -163,6 +168,7 @@
reg = <0x3100 0x100>;
interrupts = <43 2>;
interrupt-parent = <&mpic>;
sleep = <&pmc 0x00000004 0>;
dfsrr;
};
......@@ -174,6 +180,7 @@
clock-frequency = <0>;
interrupts = <42 2>;
interrupt-parent = <&mpic>;
sleep = <&pmc 0x00000002 0>;
};
serial1: serial@4600 {
......@@ -184,6 +191,7 @@
clock-frequency = <0>;
interrupts = <42 2>;
interrupt-parent = <&mpic>;
sleep = <&pmc 0x00000008 0>;
};
spi@7000 {
......@@ -196,6 +204,7 @@
interrupt-parent = <&mpic>;
mode = "cpu";
gpios = <&sdcsr_pio 7 0>;
sleep = <&pmc 0x00000800 0>;
mmc-slot@0 {
compatible = "fsl,mpc8610hpcd-mmc-slot",
......@@ -213,6 +222,7 @@
reg = <0x2c000 100>;
interrupts = <72 2>;
interrupt-parent = <&mpic>;
sleep = <&pmc 0x04000000 0>;
};
mpic: interrupt-controller@40000 {
......@@ -241,9 +251,18 @@
};
global-utilities@e0000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,mpc8610-guts";
reg = <0xe0000 0x1000>;
ranges = <0 0xe0000 0x1000>;
fsl,has-rstcr;
pmc: power@70 {
compatible = "fsl,mpc8610-pmc",
"fsl,mpc8641d-pmc";
reg = <0x70 0x20>;
};
};
wdt@e4000 {
......@@ -262,6 +281,7 @@
fsl,playback-dma = <&dma00>;
fsl,capture-dma = <&dma01>;
fsl,fifo-depth = <8>;
sleep = <&pmc 0 0x08000000>;
};
ssi@16100 {
......@@ -271,6 +291,7 @@
interrupt-parent = <&mpic>;
interrupts = <63 2>;
fsl,fifo-depth = <8>;
sleep = <&pmc 0 0x04000000>;
};
dma@21300 {
......@@ -280,6 +301,7 @@
cell-index = <0>;
reg = <0x21300 0x4>; /* DMA general status register */
ranges = <0x0 0x21100 0x200>;
sleep = <&pmc 0x00000400 0>;
dma00: dma-channel@0 {
compatible = "fsl,mpc8610-dma-channel",
......@@ -322,6 +344,7 @@
cell-index = <1>;
reg = <0xc300 0x4>; /* DMA general status register */
ranges = <0x0 0xc100 0x200>;
sleep = <&pmc 0x00000200 0>;
dma-channel@0 {
compatible = "fsl,mpc8610-dma-channel",
......@@ -369,6 +392,7 @@
bus-range = <0 0>;
ranges = <0x02000000 0x0 0x80000000 0x80000000 0x0 0x10000000
0x01000000 0x0 0x00000000 0xe1000000 0x0 0x00100000>;
sleep = <&pmc 0x80000000 0>;
clock-frequency = <33333333>;
interrupt-parent = <&mpic>;
interrupts = <24 2>;
......@@ -398,6 +422,7 @@
bus-range = <1 3>;
ranges = <0x02000000 0x0 0xa0000000 0xa0000000 0x0 0x10000000
0x01000000 0x0 0x00000000 0xe3000000 0x0 0x00100000>;
sleep = <&pmc 0x40000000 0>;
clock-frequency = <33333333>;
interrupt-parent = <&mpic>;
interrupts = <26 2>;
......@@ -474,6 +499,7 @@
0x0000 0 0 4 &mpic 7 1>;
interrupt-parent = <&mpic>;
interrupts = <25 2>;
sleep = <&pmc 0x20000000 0>;
clock-frequency = <33333333>;
};
};
......@@ -19,6 +19,7 @@
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
......@@ -41,10 +42,46 @@
#include "mpc86xx.h"
static struct device_node *pixis_node;
static unsigned char *pixis_bdcfg0, *pixis_arch;
#ifdef CONFIG_SUSPEND
static irqreturn_t mpc8610_sw9_irq(int irq, void *data)
{
pr_debug("%s: PIXIS' event (sw9/wakeup) IRQ handled\n", __func__);
return IRQ_HANDLED;
}
static void __init mpc8610_suspend_init(void)
{
int irq;
int ret;
if (!pixis_node)
return;
irq = irq_of_parse_and_map(pixis_node, 0);
if (!irq) {
pr_err("%s: can't map pixis event IRQ.\n", __func__);
return;
}
ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9/wakeup", NULL);
if (ret) {
pr_err("%s: can't request pixis event IRQ: %d\n",
__func__, ret);
irq_dispose_mapping(irq);
}
enable_irq_wake(irq);
}
#else
static inline void mpc8610_suspend_init(void) { }
#endif /* CONFIG_SUSPEND */
static struct of_device_id __initdata mpc8610_ids[] = {
{ .compatible = "fsl,mpc8610-immr", },
{ .compatible = "fsl,mpc8610-guts", },
{ .compatible = "simple-bus", },
{ .compatible = "gianfar", },
{}
......@@ -55,6 +92,9 @@ static int __init mpc8610_declare_of_platform_devices(void)
/* Firstly, register PIXIS GPIOs. */
simple_gpiochip_init("fsl,fpga-pixis-gpio-bank");
/* Enable wakeup on PIXIS' event IRQ. */
mpc8610_suspend_init();
/* Without this call, the SSI device driver won't get probed. */
of_platform_bus_probe(NULL, mpc8610_ids, NULL);
......@@ -250,10 +290,10 @@ static void __init mpc86xx_hpcd_setup_arch(void)
diu_ops.set_sysfs_monitor_port = mpc8610hpcd_set_sysfs_monitor_port;
#endif
np = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
if (np) {
of_address_to_resource(np, 0, &r);
of_node_put(np);
pixis_node = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
if (pixis_node) {
of_address_to_resource(pixis_node, 0, &r);
of_node_put(pixis_node);
pixis = ioremap(r.start, 32);
if (!pixis) {
printk(KERN_ERR "Err: can't map FPGA cfg register!\n");
......
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