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char/genrtc: remove powerpc support

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PowerPC is the last architecture using the GEN_RTC driver on some
machines, but we can migrate them all to using the RTC_DRV_GENERIC
driver instead now.

This moves over the CONFIG_GEN_RTC option from drivers/char into
arch/powerpc/platforms/Kconfig and makes it just select the
replacement driver instead, for the only reason of not breaking
existing defconfig and .config files that users may have.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Arnd Bergmann 2016-05-30 20:58:01 +02:00 committed by Alexandre Belloni
parent 169047f447
commit 835ea93e9d
5 changed files with 15 additions and 82 deletions
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78
arch/powerpc/include/asm/rtc.h
View File

@ -1,78 +0,0 @@
/*
* Real-time clock definitions and interfaces
*
* Author: Tom Rini <trini@mvista.com>
*
* 2002 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*
* Based on:
* include/asm-m68k/rtc.h
*
* Copyright Richard Zidlicky
* implementation details for genrtc/q40rtc driver
*
* And the old drivers/macintosh/rtc.c which was heavily based on:
* Linux/SPARC Real Time Clock Driver
* Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
*
* With additional work by Paul Mackerras and Franz Sirl.
*/
#ifndef __ASM_POWERPC_RTC_H__
#define __ASM_POWERPC_RTC_H__
#ifdef __KERNEL__
#include <linux/rtc.h>
#include <asm/machdep.h>
#include <asm/time.h>
#define RTC_PIE 0x40 /* periodic interrupt enable */
#define RTC_AIE 0x20 /* alarm interrupt enable */
#define RTC_UIE 0x10 /* update-finished interrupt enable */
/* some dummy definitions */
#define RTC_BATT_BAD 0x100 /* battery bad */
#define RTC_SQWE 0x08 /* enable square-wave output */
#define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */
#define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */
#define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */
static inline unsigned int get_rtc_time(struct rtc_time *time)
{
if (ppc_md.get_rtc_time)
ppc_md.get_rtc_time(time);
return RTC_24H;
}
/* Set the current date and time in the real time clock. */
static inline int set_rtc_time(struct rtc_time *time)
{
if (ppc_md.set_rtc_time)
return ppc_md.set_rtc_time(time);
return -EINVAL;
}
static inline unsigned int get_rtc_ss(void)
{
struct rtc_time h;
get_rtc_time(&h);
return h.tm_sec;
}
static inline int get_rtc_pll(struct rtc_pll_info *pll)
{
return -EINVAL;
}
static inline int set_rtc_pll(struct rtc_pll_info *pll)
{
return -EINVAL;
}
#endif /* __KERNEL__ */
#endif /* __ASM_POWERPC_RTC_H__ */

11
arch/powerpc/platforms/Kconfig
View File

@ -321,6 +321,17 @@ config OF_RTC
Uses information from the OF or flattened device tree to instantiate
platform devices for direct mapped RTC chips like the DS1742 or DS1743.
config GEN_RTC
bool "Use the platform RTC operations from user space"
select RTC_CLASS
select RTC_DRV_GENERIC
help
This option provides backwards compatibility with the old gen_rtc.ko
module that was traditionally used for old PowerPC machines.
Platforms should migrate to enabling the RTC_DRV_GENERIC by hand
replacing their get_rtc_time/set_rtc_time callbacks with
a proper RTC device driver.
config SIMPLE_GPIO
bool "Support for simple, memory-mapped GPIO controllers"
depends on PPC

2
arch/powerpc/platforms/ps3/time.c
View File

@ -20,9 +20,9 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <asm/firmware.h>
#include <asm/rtc.h>
#include <asm/lv1call.h>
#include <asm/ps3.h>

4
drivers/char/Kconfig
View File

@ -325,10 +325,10 @@ config JS_RTC
To compile this driver as a module, choose M here: the
module will be called js-rtc.
config GEN_RTC
config OLD_GEN_RTC
tristate "Generic /dev/rtc emulation"
depends on RTC!=y
depends on PPC
depends on BROKEN
---help---
If you say Y here and create a character special file /dev/rtc with
major number 10 and minor number 135 using mknod ("man mknod"), you

2
drivers/char/Makefile
View File

@ -25,7 +25,7 @@ obj-$(CONFIG_APPLICOM) += applicom.o
obj-$(CONFIG_SONYPI) += sonypi.o
obj-$(CONFIG_RTC) += rtc.o
obj-$(CONFIG_HPET) += hpet.o
obj-$(CONFIG_GEN_RTC) += genrtc.o
obj-$(CONFIG_OLD_GEN_RTC) += genrtc.o
obj-$(CONFIG_EFI_RTC) += efirtc.o
obj-$(CONFIG_DS1302) += ds1302.o
obj-$(CONFIG_XILINX_HWICAP) += xilinx_hwicap/