Merge branch 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Serialize EFI time accesses on rtc_lock x86: Serialize SMP bootup CMOS accesses on rtc_lock rtc: stmp3xxx: Remove UIE handlers rtc: stmp3xxx: Get rid of mach-specific accessors rtc: stmp3xxx: Initialize drvdata before registering device rtc: stmp3xxx: Port stmp-functions to mxs-equivalents rtc: stmp3xxx: Restore register definitions rtc: vt8500: Use define instead of hardcoded value for status bit
This commit is contained in:
Linus Torvalds
commit
52de84f3f3
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@ -10,7 +10,11 @@ static inline void smpboot_clear_io_apic_irqs(void)
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static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
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{
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unsigned long flags;
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spin_lock_irqsave(&rtc_lock, flags);
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CMOS_WRITE(0xa, 0xf);
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spin_unlock_irqrestore(&rtc_lock, flags);
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local_flush_tlb();
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pr_debug("1.\n");
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*((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_high)) =
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@ -23,6 +27,8 @@ static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
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static inline void smpboot_restore_warm_reset_vector(void)
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{
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unsigned long flags;
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/*
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* Install writable page 0 entry to set BIOS data area.
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*/
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@ -32,7 +38,9 @@ static inline void smpboot_restore_warm_reset_vector(void)
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* Paranoid: Set warm reset code and vector here back
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* to default values.
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*/
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spin_lock_irqsave(&rtc_lock, flags);
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CMOS_WRITE(0, 0xf);
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spin_unlock_irqrestore(&rtc_lock, flags);
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*((volatile u32 *)phys_to_virt(apic->trampoline_phys_low)) = 0;
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}
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@ -79,26 +79,50 @@ early_param("add_efi_memmap", setup_add_efi_memmap);
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static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
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{
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return efi_call_virt2(get_time, tm, tc);
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unsigned long flags;
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efi_status_t status;
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spin_lock_irqsave(&rtc_lock, flags);
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status = efi_call_virt2(get_time, tm, tc);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return status;
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}
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static efi_status_t virt_efi_set_time(efi_time_t *tm)
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{
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return efi_call_virt1(set_time, tm);
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unsigned long flags;
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efi_status_t status;
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spin_lock_irqsave(&rtc_lock, flags);
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status = efi_call_virt1(set_time, tm);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return status;
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}
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static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
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efi_bool_t *pending,
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efi_time_t *tm)
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{
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return efi_call_virt3(get_wakeup_time,
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enabled, pending, tm);
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unsigned long flags;
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efi_status_t status;
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spin_lock_irqsave(&rtc_lock, flags);
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status = efi_call_virt3(get_wakeup_time,
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enabled, pending, tm);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return status;
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}
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static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
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{
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return efi_call_virt2(set_wakeup_time,
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enabled, tm);
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unsigned long flags;
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efi_status_t status;
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spin_lock_irqsave(&rtc_lock, flags);
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status = efi_call_virt2(set_wakeup_time,
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enabled, tm);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return status;
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}
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static efi_status_t virt_efi_get_variable(efi_char16_t *name,
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@ -164,11 +188,14 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
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static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
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efi_time_cap_t *tc)
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{
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unsigned long flags;
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efi_status_t status;
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spin_lock_irqsave(&rtc_lock, flags);
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efi_call_phys_prelog();
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status = efi_call_phys2(efi_phys.get_time, tm, tc);
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efi_call_phys_epilog();
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spin_unlock_irqrestore(&rtc_lock, flags);
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return status;
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}
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@ -981,11 +981,11 @@ config RTC_DRV_COH901331
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config RTC_DRV_STMP
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tristate "Freescale STMP3xxx RTC"
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depends on ARCH_STMP3XXX
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tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
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depends on ARCH_MXS
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help
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If you say yes here you will get support for the onboard
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STMP3xxx RTC.
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STMP3xxx/i.MX23/i.MX28 RTC.
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This driver can also be built as a module. If so, the module
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will be called rtc-stmp3xxx.
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@ -6,6 +6,7 @@
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*
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* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
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* Copyright 2011 Wolfram Sang, Pengutronix e.K.
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*/
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/*
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@ -18,21 +19,41 @@
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/rtc.h>
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#include <linux/slab.h>
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#include <mach/platform.h>
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#include <mach/stmp3xxx.h>
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#include <mach/regs-rtc.h>
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#include <mach/common.h>
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#define STMP3XXX_RTC_CTRL 0x0
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#define STMP3XXX_RTC_CTRL_SET 0x4
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#define STMP3XXX_RTC_CTRL_CLR 0x8
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#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001
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#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002
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#define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004
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#define STMP3XXX_RTC_STAT 0x10
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#define STMP3XXX_RTC_STAT_STALE_SHIFT 16
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#define STMP3XXX_RTC_STAT_RTC_PRESENT 0x80000000
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#define STMP3XXX_RTC_SECONDS 0x30
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#define STMP3XXX_RTC_ALARM 0x40
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#define STMP3XXX_RTC_PERSISTENT0 0x60
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#define STMP3XXX_RTC_PERSISTENT0_SET 0x64
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#define STMP3XXX_RTC_PERSISTENT0_CLR 0x68
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#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN 0x00000002
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#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN 0x00000004
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#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE 0x00000080
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struct stmp3xxx_rtc_data {
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struct rtc_device *rtc;
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unsigned irq_count;
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void __iomem *io;
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int irq_alarm, irq_1msec;
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int irq_alarm;
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};
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static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
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@ -42,8 +63,8 @@ static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
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* NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0,
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* 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS
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*/
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while (__raw_readl(rtc_data->io + HW_RTC_STAT) &
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BF(0x80, RTC_STAT_STALE_REGS))
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while (readl(rtc_data->io + STMP3XXX_RTC_STAT) &
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(0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))
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cpu_relax();
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}
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@ -53,7 +74,7 @@ static int stmp3xxx_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
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struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
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stmp3xxx_wait_time(rtc_data);
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rtc_time_to_tm(__raw_readl(rtc_data->io + HW_RTC_SECONDS), rtc_tm);
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rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
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return 0;
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}
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@ -61,7 +82,7 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
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{
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struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
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__raw_writel(t, rtc_data->io + HW_RTC_SECONDS);
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writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
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stmp3xxx_wait_time(rtc_data);
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return 0;
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}
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@ -70,47 +91,34 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
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static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
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{
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struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id);
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u32 status;
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u32 events = 0;
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u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL);
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status = __raw_readl(rtc_data->io + HW_RTC_CTRL) &
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(BM_RTC_CTRL_ALARM_IRQ | BM_RTC_CTRL_ONEMSEC_IRQ);
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if (status & BM_RTC_CTRL_ALARM_IRQ) {
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stmp3xxx_clearl(BM_RTC_CTRL_ALARM_IRQ,
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rtc_data->io + HW_RTC_CTRL);
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events |= RTC_AF | RTC_IRQF;
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if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
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writel(STMP3XXX_RTC_CTRL_ALARM_IRQ,
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rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
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rtc_update_irq(rtc_data->rtc, 1, RTC_AF | RTC_IRQF);
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return IRQ_HANDLED;
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}
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if (status & BM_RTC_CTRL_ONEMSEC_IRQ) {
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stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ,
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rtc_data->io + HW_RTC_CTRL);
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if (++rtc_data->irq_count % 1000 == 0) {
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events |= RTC_UF | RTC_IRQF;
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rtc_data->irq_count = 0;
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}
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}
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if (events)
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rtc_update_irq(rtc_data->rtc, 1, events);
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return IRQ_HANDLED;
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return IRQ_NONE;
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}
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static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
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{
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struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
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void __iomem *p = rtc_data->io + HW_RTC_PERSISTENT0,
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*ctl = rtc_data->io + HW_RTC_CTRL;
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if (enabled) {
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stmp3xxx_setl(BM_RTC_PERSISTENT0_ALARM_EN |
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BM_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
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stmp3xxx_setl(BM_RTC_CTRL_ALARM_IRQ_EN, ctl);
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writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
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STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
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rtc_data->io + STMP3XXX_RTC_PERSISTENT0_SET);
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writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
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rtc_data->io + STMP3XXX_RTC_CTRL_SET);
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} else {
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stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN |
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BM_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
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stmp3xxx_clearl(BM_RTC_CTRL_ALARM_IRQ_EN, ctl);
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writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
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STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
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rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
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writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
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rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
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}
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return 0;
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}
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@ -119,7 +127,7 @@ static int stmp3xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
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{
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struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
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rtc_time_to_tm(__raw_readl(rtc_data->io + HW_RTC_ALARM), &alm->time);
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rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
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return 0;
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}
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@ -129,7 +137,10 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
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struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
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|
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rtc_tm_to_time(&alm->time, &t);
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__raw_writel(t, rtc_data->io + HW_RTC_ALARM);
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writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
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stmp3xxx_alarm_irq_enable(dev, alm->enabled);
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return 0;
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}
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@ -149,11 +160,11 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
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if (!rtc_data)
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return 0;
|
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|
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stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN | BM_RTC_CTRL_ALARM_IRQ_EN,
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rtc_data->io + HW_RTC_CTRL);
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writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
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rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
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free_irq(rtc_data->irq_alarm, &pdev->dev);
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free_irq(rtc_data->irq_1msec, &pdev->dev);
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rtc_device_unregister(rtc_data->rtc);
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platform_set_drvdata(pdev, NULL);
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iounmap(rtc_data->io);
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kfree(rtc_data);
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@ -185,20 +196,26 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
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}
|
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rtc_data->irq_alarm = platform_get_irq(pdev, 0);
|
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rtc_data->irq_1msec = platform_get_irq(pdev, 1);
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|
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if (!(__raw_readl(HW_RTC_STAT + rtc_data->io) &
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BM_RTC_STAT_RTC_PRESENT)) {
|
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if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
|
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STMP3XXX_RTC_STAT_RTC_PRESENT)) {
|
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dev_err(&pdev->dev, "no device onboard\n");
|
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err = -ENODEV;
|
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goto out_remap;
|
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}
|
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|
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stmp3xxx_reset_block(rtc_data->io, true);
|
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stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN |
|
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BM_RTC_PERSISTENT0_ALARM_WAKE_EN |
|
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BM_RTC_PERSISTENT0_ALARM_WAKE,
|
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rtc_data->io + HW_RTC_PERSISTENT0);
|
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platform_set_drvdata(pdev, rtc_data);
|
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|
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mxs_reset_block(rtc_data->io);
|
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writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
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STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
|
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STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
|
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rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
|
||||
|
||||
writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN |
|
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STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
|
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rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
|
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|
||||
rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
|
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&stmp3xxx_rtc_ops, THIS_MODULE);
|
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if (IS_ERR(rtc_data->rtc)) {
|
||||
|
|
@ -206,33 +223,20 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
|
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goto out_remap;
|
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}
|
||||
|
||||
rtc_data->irq_count = 0;
|
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err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt,
|
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IRQF_DISABLED, "RTC alarm", &pdev->dev);
|
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err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0,
|
||||
"RTC alarm", &pdev->dev);
|
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if (err) {
|
||||
dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
|
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rtc_data->irq_alarm);
|
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goto out_irq_alarm;
|
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}
|
||||
err = request_irq(rtc_data->irq_1msec, stmp3xxx_rtc_interrupt,
|
||||
IRQF_DISABLED, "RTC tick", &pdev->dev);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
|
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rtc_data->irq_1msec);
|
||||
goto out_irq1;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, rtc_data);
|
||||
|
||||
return 0;
|
||||
|
||||
out_irq1:
|
||||
free_irq(rtc_data->irq_alarm, &pdev->dev);
|
||||
out_irq_alarm:
|
||||
stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN | BM_RTC_CTRL_ALARM_IRQ_EN,
|
||||
rtc_data->io + HW_RTC_CTRL);
|
||||
rtc_device_unregister(rtc_data->rtc);
|
||||
out_remap:
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
iounmap(rtc_data->io);
|
||||
out_free:
|
||||
kfree(rtc_data);
|
||||
|
|
@ -249,11 +253,11 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
|
|||
{
|
||||
struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
|
||||
|
||||
stmp3xxx_reset_block(rtc_data->io, true);
|
||||
stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN |
|
||||
BM_RTC_PERSISTENT0_ALARM_WAKE_EN |
|
||||
BM_RTC_PERSISTENT0_ALARM_WAKE,
|
||||
rtc_data->io + HW_RTC_PERSISTENT0);
|
||||
mxs_reset_block(rtc_data->io);
|
||||
writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
|
||||
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
|
||||
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
|
||||
rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
|
|
@ -286,5 +290,6 @@ module_init(stmp3xxx_rtc_init);
|
|||
module_exit(stmp3xxx_rtc_exit);
|
||||
|
||||
MODULE_DESCRIPTION("STMP3xxx RTC Driver");
|
||||
MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com>");
|
||||
MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and "
|
||||
"Wolfram Sang <w.sang@pengutronix.de>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
|
|
@ -74,6 +74,8 @@
|
|||
#define VT8500_RTC_CR_SM_SEC (1 << 3) /* 0: 1Hz/60, 1: 1Hz */
|
||||
#define VT8500_RTC_CR_CALIB (1 << 4) /* Enable calibration */
|
||||
|
||||
#define VT8500_RTC_IS_ALARM (1 << 0) /* Alarm interrupt status */
|
||||
|
||||
struct vt8500_rtc {
|
||||
void __iomem *regbase;
|
||||
struct resource *res;
|
||||
|
|
@ -96,7 +98,7 @@ static irqreturn_t vt8500_rtc_irq(int irq, void *dev_id)
|
|||
|
||||
spin_unlock(&vt8500_rtc->lock);
|
||||
|
||||
if (isr & 1)
|
||||
if (isr & VT8500_RTC_IS_ALARM)
|
||||
events |= RTC_AF | RTC_IRQF;
|
||||
|
||||
rtc_update_irq(vt8500_rtc->rtc, 1, events);
|
||||
|
|
@ -161,8 +163,8 @@ static int vt8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
|||
alrm->time.tm_sec = bcd2bin((alarm & TIME_SEC_MASK));
|
||||
|
||||
alrm->enabled = (alarm & ALARM_ENABLE_MASK) ? 1 : 0;
|
||||
alrm->pending = (isr & VT8500_RTC_IS_ALARM) ? 1 : 0;
|
||||
|
||||
alrm->pending = (isr & 1) ? 1 : 0;
|
||||
return rtc_valid_tm(&alrm->time);
|
||||
}
|
||||
|
||||
|
|
|
|||
Reference in New Issue