[PATCH] hw/rtc/m48t59: Simplify m48t59_init()

[Philippe Mathieu-Daudé]

As the 'io_base' argument of m48t59_init() is unused (set to 0),
remove it to simplify.
To create a device on the ISA bus, m48t59_init_isa() is the
preferred function to use.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/hw/rtc/m48t59.h |  2 +-
 hw/ppc/ppc405_boards.c  |  2 +-
 hw/rtc/m48t59.c         | 10 ++--------
 hw/sparc/sun4m.c        |  2 +-
 hw/sparc64/sun4u.c      |  2 +-
 5 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/include/hw/rtc/m48t59.h b/include/hw/rtc/m48t59.h
index 04abedf3b2b..62297ee0db1 100644
--- a/include/hw/rtc/m48t59.h
+++ b/include/hw/rtc/m48t59.h
@@ -50,7 +50,7 @@ struct NvramClass {
 Nvram *m48t59_init_isa(ISABus *bus, uint32_t io_base, uint16_t size,
                        int base_year, int type);
 Nvram *m48t59_init(qemu_irq IRQ, hwaddr mem_base,
-                   uint32_t io_base, uint16_t size, int base_year,
+                   uint16_t size, int base_year,
                    int type);
 
 #endif /* HW_M48T59_H */
diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
index 6198ec1035b..93ffee801a3 100644
--- a/hw/ppc/ppc405_boards.c
+++ b/hw/ppc/ppc405_boards.c
@@ -227,7 +227,7 @@ static void ref405ep_init(MachineState *machine)
     /* Register FPGA */
     ref405ep_fpga_init(sysmem, 0xF0300000);
     /* Register NVRAM */
-    m48t59_init(NULL, 0xF0000000, 0, 8192, 1968, 8);
+    m48t59_init(NULL, 0xF0000000, 8192, 1968, 8);
     /* Load kernel */
     linux_boot = (kernel_filename != NULL);
     if (linux_boot) {
diff --git a/hw/rtc/m48t59.c b/hw/rtc/m48t59.c
index 6525206976b..2d6a095c4e4 100644
--- a/hw/rtc/m48t59.c
+++ b/hw/rtc/m48t59.c
@@ -566,7 +566,7 @@ const MemoryRegionOps m48t59_io_ops = {
 
 /* Initialisation routine */
 Nvram *m48t59_init(qemu_irq IRQ, hwaddr mem_base,
-                   uint32_t io_base, uint16_t size, int base_year,
+                   uint16_t size, int base_year,
                    int model)
 {
     DeviceState *dev;
@@ -584,13 +584,7 @@ Nvram *m48t59_init(qemu_irq IRQ, hwaddr mem_base,
         s = SYS_BUS_DEVICE(dev);
         sysbus_realize_and_unref(s, &error_fatal);
         sysbus_connect_irq(s, 0, IRQ);
-        if (io_base != 0) {
-            memory_region_add_subregion(get_system_io(), io_base,
-                                        sysbus_mmio_get_region(s, 1));
-        }
-        if (mem_base != 0) {
-            sysbus_mmio_map(s, 0, mem_base);
-        }
+        sysbus_mmio_map(s, 0, mem_base);
 
         return NVRAM(s);
     }
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index 947b69d1597..56a0d38f274 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -970,7 +970,7 @@ static void sun4m_hw_init(const struct sun4m_hwdef *hwdef,
         create_unimplemented_device("SUNW,sx", hwdef->sx_base, 0x2000);
     }
 
-    nvram = m48t59_init(slavio_irq[0], hwdef->nvram_base, 0, 0x2000, 1968, 8);
+    nvram = m48t59_init(slavio_irq[0], hwdef->nvram_base, 0x2000, 1968, 8);
 
     slavio_timer_init_all(hwdef->counter_base, slavio_irq[19], slavio_cpu_irq, 
smp_cpus);
 
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index b4aabfc076f..1cc57b030a7 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -675,7 +675,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
     pci_ide_create_devs(pci_dev);
 
     /* Map NVRAM into I/O (ebus) space */
-    nvram = m48t59_init(NULL, 0, 0, NVRAM_SIZE, 1968, 59);
+    nvram = m48t59_init(NULL, 0, NVRAM_SIZE, 1968, 59);
     s = SYS_BUS_DEVICE(nvram);
     memory_region_add_subregion(pci_address_space_io(ebus), 0x2000,
                                 sysbus_mmio_get_region(s, 0));
-- 
2.26.2