mips: ip32: add platform data hooks to use DS1685 driver
This modifies the IP32 (SGI O2) platform and reset code to utilize the new rtc-ds1685 driver. The old mc146818rtc.h header is removed and ip32_defconfig is updated as well. Signed-off-by: Joshua Kinard <kumba@gentoo.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>hifive-unleashed-5.1
Joshua Kinard
Linus Torvalds
parent
9e522c0d28
commit
15beb694c6
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@ -105,7 +105,8 @@ CONFIG_RTC_CLASS=y
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# CONFIG_RTC_HCTOSYS is not set
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# CONFIG_RTC_INTF_SYSFS is not set
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# CONFIG_RTC_INTF_PROC is not set
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CONFIG_RTC_DRV_CMOS=y
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CONFIG_RTC_DRV_DS1685_FAMILY=y
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CONFIG_RTC_DRV_DS1685=y
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CONFIG_EXT2_FS=y
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CONFIG_EXT2_FS_XATTR=y
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CONFIG_EXT2_FS_POSIX_ACL=y
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@ -1,36 +0,0 @@
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1998, 2001, 03 by Ralf Baechle
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* Copyright (C) 2000 Harald Koerfgen
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*
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* RTC routines for IP32 style attached Dallas chip.
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*/
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#ifndef __ASM_MACH_IP32_MC146818RTC_H
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#define __ASM_MACH_IP32_MC146818RTC_H
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#include <asm/ip32/mace.h>
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#define RTC_PORT(x) (0x70 + (x))
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static unsigned char CMOS_READ(unsigned long addr)
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{
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return mace->isa.rtc[addr << 8];
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}
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static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
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{
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mace->isa.rtc[addr << 8] = data;
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}
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/*
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* FIXME: Do it right. For now just assume that no one lives in 20th century
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* and no O2 user in 22th century ;-)
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*/
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#define mc146818_decode_year(year) ((year) + 2000)
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#define RTC_ALWAYS_BCD 0
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#endif /* __ASM_MACH_IP32_MC146818RTC_H */
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@ -9,10 +9,13 @@
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/serial_8250.h>
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#include <linux/rtc/ds1685.h>
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#include <asm/ip32/mace.h>
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#include <asm/ip32/ip32_ints.h>
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extern void ip32_prepare_poweroff(void);
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#define MACEISA_SERIAL1_OFFS offsetof(struct sgi_mace, isa.serial1)
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#define MACEISA_SERIAL2_OFFS offsetof(struct sgi_mace, isa.serial2)
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@ -90,18 +93,47 @@ static __init int sgio2btns_devinit(void)
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device_initcall(sgio2btns_devinit);
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static struct resource sgio2_cmos_rsrc[] = {
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#define MACE_RTC_RES_START (MACE_BASE + offsetof(struct sgi_mace, isa.rtc))
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#define MACE_RTC_RES_END (MACE_RTC_RES_START + 32767)
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static struct resource ip32_rtc_resources[] = {
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{
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.start = 0x70,
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.end = 0x71,
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.flags = IORESOURCE_IO
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.start = MACEISA_RTC_IRQ,
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.end = MACEISA_RTC_IRQ,
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.flags = IORESOURCE_IRQ
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}, {
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.start = MACE_RTC_RES_START,
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.end = MACE_RTC_RES_END,
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.flags = IORESOURCE_MEM,
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}
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};
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static __init int sgio2_cmos_devinit(void)
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/* RTC registers on IP32 are each padded by 256 bytes (0x100). */
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static struct ds1685_rtc_platform_data
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ip32_rtc_platform_data[] = {
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{
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.regstep = 0x100,
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.bcd_mode = true,
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.no_irq = false,
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.uie_unsupported = false,
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.alloc_io_resources = true,
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.plat_prepare_poweroff = ip32_prepare_poweroff,
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},
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};
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struct platform_device ip32_rtc_device = {
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.name = "rtc-ds1685",
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.id = -1,
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.dev = {
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.platform_data = ip32_rtc_platform_data,
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},
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.num_resources = ARRAY_SIZE(ip32_rtc_resources),
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.resource = ip32_rtc_resources,
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};
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+static int __init sgio2_rtc_devinit(void)
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{
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return IS_ERR(platform_device_register_simple("rtc_cmos", -1,
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sgio2_cmos_rsrc, 1));
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return platform_device_register(&ip32_rtc_device);
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}
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device_initcall(sgio2_cmos_devinit);
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@ -11,10 +11,11 @@
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#include <linux/compiler.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/notifier.h>
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#include <linux/delay.h>
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#include <linux/ds17287rtc.h>
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#include <linux/rtc/ds1685.h>
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#include <linux/interrupt.h>
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#include <linux/pm.h>
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@ -33,53 +34,40 @@
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#define POWERDOWN_FREQ (HZ / 4)
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#define PANIC_FREQ (HZ / 8)
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static struct timer_list power_timer, blink_timer, debounce_timer;
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static int has_panicked, shuting_down;
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extern struct platform_device ip32_rtc_device;
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static void ip32_machine_restart(char *command) __noreturn;
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static void ip32_machine_halt(void) __noreturn;
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static void ip32_machine_power_off(void) __noreturn;
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static struct timer_list power_timer, blink_timer;
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static int has_panicked, shutting_down;
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static __noreturn void ip32_poweroff(void *data)
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{
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void (*poweroff_func)(struct platform_device *) =
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symbol_get(ds1685_rtc_poweroff);
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#ifdef CONFIG_MODULES
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/* If the first __symbol_get failed, our module wasn't loaded. */
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if (!poweroff_func) {
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request_module("rtc-ds1685");
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poweroff_func = symbol_get(ds1685_rtc_poweroff);
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}
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#endif
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if (!poweroff_func)
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pr_emerg("RTC not available for power-off. Spinning forever ...\n");
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else {
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(*poweroff_func)((struct platform_device *)data);
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symbol_put(ds1685_rtc_poweroff);
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}
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unreachable();
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}
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static void ip32_machine_restart(char *cmd) __noreturn;
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static void ip32_machine_restart(char *cmd)
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{
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msleep(20);
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crime->control = CRIME_CONTROL_HARD_RESET;
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while (1);
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}
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static inline void ip32_machine_halt(void)
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{
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ip32_machine_power_off();
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}
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static void ip32_machine_power_off(void)
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{
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unsigned char reg_a, xctrl_a, xctrl_b;
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disable_irq(MACEISA_RTC_IRQ);
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reg_a = CMOS_READ(RTC_REG_A);
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/* setup for kickstart & wake-up (DS12287 Ref. Man. p. 19) */
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reg_a &= ~DS_REGA_DV2;
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reg_a |= DS_REGA_DV1;
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CMOS_WRITE(reg_a | DS_REGA_DV0, RTC_REG_A);
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wbflush();
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xctrl_b = CMOS_READ(DS_B1_XCTRL4B)
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| DS_XCTRL4B_ABE | DS_XCTRL4B_KFE;
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CMOS_WRITE(xctrl_b, DS_B1_XCTRL4B);
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xctrl_a = CMOS_READ(DS_B1_XCTRL4A) & ~DS_XCTRL4A_IFS;
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CMOS_WRITE(xctrl_a, DS_B1_XCTRL4A);
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wbflush();
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/* adios amigos... */
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CMOS_WRITE(xctrl_a | DS_XCTRL4A_PAB, DS_B1_XCTRL4A);
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CMOS_WRITE(reg_a, RTC_REG_A);
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wbflush();
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while (1);
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}
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static void power_timeout(unsigned long data)
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{
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ip32_machine_power_off();
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unreachable();
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}
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static void blink_timeout(unsigned long data)
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@ -89,44 +77,27 @@ static void blink_timeout(unsigned long data)
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mod_timer(&blink_timer, jiffies + data);
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}
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static void debounce(unsigned long data)
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static void ip32_machine_halt(void)
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{
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unsigned char reg_a, reg_c, xctrl_a;
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reg_c = CMOS_READ(RTC_INTR_FLAGS);
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reg_a = CMOS_READ(RTC_REG_A);
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CMOS_WRITE(reg_a | DS_REGA_DV0, RTC_REG_A);
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wbflush();
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xctrl_a = CMOS_READ(DS_B1_XCTRL4A);
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if ((xctrl_a & DS_XCTRL4A_IFS) || (reg_c & RTC_IRQF )) {
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/* Interrupt still being sent. */
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debounce_timer.expires = jiffies + 50;
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add_timer(&debounce_timer);
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/* clear interrupt source */
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CMOS_WRITE(xctrl_a & ~DS_XCTRL4A_IFS, DS_B1_XCTRL4A);
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CMOS_WRITE(reg_a & ~DS_REGA_DV0, RTC_REG_A);
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return;
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}
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CMOS_WRITE(reg_a & ~DS_REGA_DV0, RTC_REG_A);
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if (has_panicked)
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ip32_machine_restart(NULL);
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enable_irq(MACEISA_RTC_IRQ);
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ip32_poweroff(&ip32_rtc_device);
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}
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static inline void ip32_power_button(void)
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static void power_timeout(unsigned long data)
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{
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ip32_poweroff(&ip32_rtc_device);
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}
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void ip32_prepare_poweroff(void)
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{
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if (has_panicked)
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return;
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if (shuting_down || kill_cad_pid(SIGINT, 1)) {
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if (shutting_down || kill_cad_pid(SIGINT, 1)) {
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/* No init process or button pressed twice. */
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ip32_machine_power_off();
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ip32_poweroff(&ip32_rtc_device);
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}
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shuting_down = 1;
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shutting_down = 1;
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blink_timer.data = POWERDOWN_FREQ;
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blink_timeout(POWERDOWN_FREQ);
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@ -136,27 +107,6 @@ static inline void ip32_power_button(void)
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add_timer(&power_timer);
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}
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static irqreturn_t ip32_rtc_int(int irq, void *dev_id)
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{
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unsigned char reg_c;
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reg_c = CMOS_READ(RTC_INTR_FLAGS);
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if (!(reg_c & RTC_IRQF)) {
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printk(KERN_WARNING
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"%s: RTC IRQ without RTC_IRQF\n", __func__);
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}
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/* Wait until interrupt goes away */
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disable_irq_nosync(MACEISA_RTC_IRQ);
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init_timer(&debounce_timer);
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debounce_timer.function = debounce;
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debounce_timer.expires = jiffies + 50;
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add_timer(&debounce_timer);
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printk(KERN_DEBUG "Power button pressed\n");
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ip32_power_button();
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return IRQ_HANDLED;
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}
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static int panic_event(struct notifier_block *this, unsigned long event,
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void *ptr)
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{
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@ -190,15 +140,12 @@ static __init int ip32_reboot_setup(void)
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_machine_restart = ip32_machine_restart;
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_machine_halt = ip32_machine_halt;
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pm_power_off = ip32_machine_power_off;
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pm_power_off = ip32_machine_halt;
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init_timer(&blink_timer);
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blink_timer.function = blink_timeout;
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atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
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if (request_irq(MACEISA_RTC_IRQ, ip32_rtc_int, 0, "rtc", NULL))
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panic("Can't allocate MACEISA RTC IRQ");
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return 0;
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}
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