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MIPS: Loongson64: Make RS780E ACPI as a platform driver 

Make RS780E ACPI as a platform driver so we can enable it
by DeviceTree selectively.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang 2020-04-20 21:45:26 +08:00 committed by Thomas Bogendoerfer
parent a746f50d69
commit 0cfd2440aa
5 changed files with 46 additions and 23 deletions
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2
arch/mips/loongson64/Makefile
View File

@ -2,7 +2,7 @@
#
# Makefile for Loongson-3 family machines
#
obj-$(CONFIG_MACH_LOONGSON64) += cop2-ex.o platform.o acpi_init.o dma.o \
obj-$(CONFIG_MACH_LOONGSON64) += cop2-ex.o platform.o dma.o \
setup.o init.o env.o time.o reset.o \
obj-$(CONFIG_SMP) += smp.o

2
arch/mips/loongson64/pci.c
View File

@ -43,8 +43,6 @@ static int __init pcibios_init(void)
register_pci_controller(&loongson_pci_controller);
sbx00_acpi_init();
return 0;
}

6
drivers/platform/mips/Kconfig
View File

@ -24,4 +24,10 @@ config CPU_HWMON
help
Loongson-3A/3B CPU Hwmon (temperature sensor) driver.
config RS780E_ACPI
bool "Loongson RS780E ACPI Controller"
depends on MACH_LOONGSON64 || COMPILE_TEST
help
Loongson RS780E PCH ACPI Controller driver.
endif # MIPS_PLATFORM_DEVICES

1
drivers/platform/mips/Makefile
View File

@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o
obj-$(CONFIG_RS780E_ACPI) += rs780e-acpi.o

58
arch/mips/loongson64/acpi_init.c → drivers/platform/mips/rs780e-acpi.c
View File

@ -3,32 +3,23 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/export.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#define SBX00_ACPI_IO_BASE 0x800
#define SBX00_ACPI_IO_SIZE 0x100
static unsigned long acpi_iobase;
#define ACPI_PM_EVT_BLK (SBX00_ACPI_IO_BASE + 0x00) /* 4 bytes */
#define ACPI_PM_CNT_BLK (SBX00_ACPI_IO_BASE + 0x04) /* 2 bytes */
#define ACPI_PMA_CNT_BLK (SBX00_ACPI_IO_BASE + 0x0F) /* 1 byte */
#define ACPI_PM_TMR_BLK (SBX00_ACPI_IO_BASE + 0x18) /* 4 bytes */
#define ACPI_GPE0_BLK (SBX00_ACPI_IO_BASE + 0x10) /* 8 bytes */
#define ACPI_END (SBX00_ACPI_IO_BASE + 0x80)
#define ACPI_PM_EVT_BLK (acpi_iobase + 0x00) /* 4 bytes */
#define ACPI_PM_CNT_BLK (acpi_iobase + 0x04) /* 2 bytes */
#define ACPI_PMA_CNT_BLK (acpi_iobase + 0x0F) /* 1 byte */
#define ACPI_PM_TMR_BLK (acpi_iobase + 0x18) /* 4 bytes */
#define ACPI_GPE0_BLK (acpi_iobase + 0x10) /* 8 bytes */
#define ACPI_END (acpi_iobase + 0x80)
#define PM_INDEX 0xCD6
#define PM_DATA 0xCD7
#define PM2_INDEX 0xCD0
#define PM2_DATA 0xCD1
/*
* SCI interrupt need acpi space, allocate here
*/
static int __init register_acpi_resource(void)
{
request_region(SBX00_ACPI_IO_BASE, SBX00_ACPI_IO_SIZE, "acpi");
return 0;
}
static void pmio_write_index(u16 index, u8 reg, u8 value)
{
outb(reg, index);
@ -141,11 +132,38 @@ void acpi_registers_setup(void)
pm2_iowrite(0xf8, value);
}
int __init sbx00_acpi_init(void)
static int rs780e_acpi_probe(struct platform_device *pdev)
{
register_acpi_resource();
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!res)
return -ENODEV;
/* SCI interrupt need acpi space, allocate here */
if (!request_region(res->start, resource_size(res), "acpi")) {
pr_err("RS780E-ACPI: Failed to request IO Region\n");
return -EBUSY;
}
acpi_iobase = res->start;
acpi_registers_setup();
acpi_hw_clear_status();
return 0;
}
static const struct of_device_id rs780e_acpi_match[] = {
{ .compatible = "loongson,rs780e-acpi" },
{},
};
static struct platform_driver rs780e_acpi_driver = {
.probe = rs780e_acpi_probe,
.driver = {
.name = "RS780E-ACPI",
.of_match_table = rs780e_acpi_match,
},
};
builtin_platform_driver(rs780e_acpi_driver);