powerpc: Hook up rtc-generic, and kill rtc-ppc

PowerPC has been a long time user of the generic RTC abstraction, so hook up
rtc-generic:
  - Create the "rtc-generic" platform device if ppc_md.get_rtc_time is set,
  - Kill rtc-ppc, as rtc-generic offers the same functionality in a more
    generic way, and supports autoloading through udev.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

4 files changed, 17 insertions, 79 deletions

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index c9564031a2a9..926ea864e34f 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -1127,3 +1127,19 @@ void div128_by_32(u64 dividend_high, u64 dividend_low,
         dr->result_low  = ((u64)y << 32) + z;
 
 }
+
+static int __init rtc_init(void)
+{
+        struct platform_device *pdev;
+
+        if (!ppc_md.get_rtc_time)
+                return -ENODEV;
+
+        pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
+        if (IS_ERR(pdev))
+                return PTR_ERR(pdev);
+
+        return 0;
+}
+
+module_init(rtc_init);
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 5aab5b917c8b..fa66d10dd5a0 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -692,20 +692,12 @@ config RTC_DRV_GENERIC
         tristate "Generic RTC support"
         # Please consider writing a new RTC driver instead of using the generic
         # RTC abstraction
-        depends on PARISC || M68K
+        depends on PARISC || M68K || PPC
         help
           Say Y or M here to enable RTC support on systems using the generic
           RTC abstraction. If you do not know what you are doing, you should
           just say Y.
 
-config RTC_DRV_PPC
-       tristate "PowerPC machine dependent RTC support"
-       depends on PPC
-       help
-         The PowerPC kernel has machine-specific functions for accessing
-         the RTC. This exposes that functionality through the generic RTC
-         class.
-
 config RTC_DRV_PXA
        tristate "PXA27x/PXA3xx"
        depends on ARCH_PXA
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 39cdb9799de6..2b022f19a6ed 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -57,7 +57,6 @@ obj-$(CONFIG_RTC_DRV_PCF8583)	+= rtc-pcf8583.o
 obj-$(CONFIG_RTC_DRV_PL030)     += rtc-pl030.o
 obj-$(CONFIG_RTC_DRV_PL031)     += rtc-pl031.o
 obj-$(CONFIG_RTC_DRV_GENERIC)   += rtc-generic.o
-obj-$(CONFIG_RTC_DRV_PPC)       += rtc-ppc.o
 obj-$(CONFIG_RTC_DRV_PXA)       += rtc-pxa.o
 obj-$(CONFIG_RTC_DRV_R9701)     += rtc-r9701.o
 obj-$(CONFIG_RTC_DRV_RS5C313)   += rtc-rs5c313.o
diff --git a/drivers/rtc/rtc-ppc.c b/drivers/rtc/rtc-ppc.c
deleted file mode 100644
index c8e97e25ef7e..000000000000
--- a/drivers/rtc/rtc-ppc.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * RTC driver for ppc_md RTC functions
- *
- * © 2007 Red Hat, Inc.
- *
- * Author: David Woodhouse <dwmw2@infradead.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/rtc.h>
-#include <linux/platform_device.h>
-#include <asm/machdep.h>
-
-static int ppc_rtc_read_time(struct device *dev, struct rtc_time *tm)
-{
-        ppc_md.get_rtc_time(tm);
-        return 0;
-}
-
-static int ppc_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
-        return ppc_md.set_rtc_time(tm);
-}
-
-static const struct rtc_class_ops ppc_rtc_ops = {
-        .set_time = ppc_rtc_set_time,
-        .read_time = ppc_rtc_read_time,
-};
-
-static struct rtc_device *rtc;
-static struct platform_device *ppc_rtc_pdev;
-
-static int __init ppc_rtc_init(void)
-{
-        if (!ppc_md.get_rtc_time || !ppc_md.set_rtc_time)
-                return -ENODEV;
-
-        ppc_rtc_pdev = platform_device_register_simple("ppc-rtc", 0, NULL, 0);
-        if (IS_ERR(ppc_rtc_pdev))
-                return PTR_ERR(ppc_rtc_pdev);
-
-        rtc = rtc_device_register("ppc_md", &ppc_rtc_pdev->dev,
-                                  &ppc_rtc_ops, THIS_MODULE);
-        if (IS_ERR(rtc)) {
-                platform_device_unregister(ppc_rtc_pdev);
-                return PTR_ERR(rtc);
-        }
-
-        return 0;
-}
-
-static void __exit ppc_rtc_exit(void)
-{
-        rtc_device_unregister(rtc);
-        platform_device_unregister(ppc_rtc_pdev);
-}
-
-module_init(ppc_rtc_init);
-module_exit(ppc_rtc_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
-MODULE_DESCRIPTION("Generic RTC class driver for PowerPC");