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>

diff --git a/arch/mips/loongson64/Makefile b/arch/mips/loongson64/Makefile
index 32b8c22..6f3c2b4 100644 (file)
--- a/arch/mips/loongson64/Makefile
+++ b/arch/mips/loongson64/Makefile
@@ -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

diff --git a/arch/mips/loongson64/pci.c b/arch/mips/loongson64/pci.c
index e84ae20..a440a27 100644 (file)
--- a/arch/mips/loongson64/pci.c
+++ b/arch/mips/loongson64/pci.c
@@ -43,8 +43,6 @@ static int __init pcibios_init(void)
 
        register_pci_controller(&loongson_pci_controller);
 
-       sbx00_acpi_init();
-
        return 0;
 }
 

diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig
index 5e77b0d..8ac1491 100644 (file)
--- a/drivers/platform/mips/Kconfig
+++ b/drivers/platform/mips/Kconfig
@@ -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

diff --git a/drivers/platform/mips/Makefile b/drivers/platform/mips/Makefile
index be8146c..1781490 100644 (file)
--- a/drivers/platform/mips/Makefile
+++ b/drivers/platform/mips/Makefile
@@ -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

diff --git a/arch/mips/loongson64/acpi_init.c b/drivers/platform/mips/rs780e-acpi.c
similarity index 70%
rename from arch/mips/loongson64/acpi_init.c
rename to drivers/platform/mips/rs780e-acpi.c
index 8d7c119..e5a643b 100644 (file)
--- a/arch/mips/loongson64/acpi_init.c
+++ b/drivers/platform/mips/rs780e-acpi.c
@@ -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);