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RTC: sa1100: support sa1100, pxa and mmp soc families
Since the regmap of rtc on sa1100, pxa and mmp Marvell soc families are almost the same, so re-arch the rtc-sa1100 to support them. Signed-off-by: Jett.Zhou <jtzhou@marvell.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Jett.Zhou
Arnd Bergmann
parent
42874759d7
commit
7cea00657d
4 changed files with 216 additions and 78 deletions
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@ -415,9 +415,29 @@ static struct resource pxa_rtc_resources[] = {
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},
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};
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static struct resource sa1100_rtc_resources[] = {
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[0] = {
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.start = 0x40900000,
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.end = 0x409000ff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_RTC1Hz,
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.end = IRQ_RTC1Hz,
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.flags = IORESOURCE_IRQ,
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},
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[2] = {
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.start = IRQ_RTCAlrm,
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.end = IRQ_RTCAlrm,
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.flags = IORESOURCE_IRQ,
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},
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};
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struct platform_device sa1100_device_rtc = {
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.name = "sa1100-rtc",
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.id = -1,
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.num_resources = ARRAY_SIZE(sa1100_rtc_resources),
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.resource = sa1100_rtc_resources,
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};
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struct platform_device pxa_device_rtc = {
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@ -334,9 +334,29 @@ void sa11x0_register_irda(struct irda_platform_data *irda)
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sa11x0_register_device(&sa11x0ir_device, irda);
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}
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static struct resource sa11x0rtc_resources[] = {
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[0] = {
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.start = 0x90010000,
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.end = 0x900100ff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_RTC1Hz,
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.end = IRQ_RTC1Hz,
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.flags = IORESOURCE_IRQ,
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},
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[2] = {
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.start = IRQ_RTCAlrm,
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.end = IRQ_RTCAlrm,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device sa11x0rtc_device = {
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.name = "sa1100-rtc",
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.id = -1,
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.resource = sa11x0rtc_resources,
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.num_resources = ARRAY_SIZE(sa11x0rtc_resources),
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};
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static struct platform_device *sa11x0_devices[] __initdata = {
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@ -774,7 +774,7 @@ config RTC_DRV_EP93XX
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config RTC_DRV_SA1100
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tristate "SA11x0/PXA2xx"
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depends on ARCH_SA1100 || ARCH_PXA
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depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
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help
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If you say Y here you will get access to the real time clock
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built into your SA11x0 or PXA2xx CPU.
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@ -27,24 +27,42 @@
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/interrupt.h>
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#include <linux/string.h>
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#include <linux/pm.h>
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#ifdef CONFIG_ARCH_PXA
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#include <mach/regs-rtc.h>
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#endif
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#define RTC_DEF_DIVIDER (32768 - 1)
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#define RTC_DEF_TRIM 0
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#define RTC_FREQ 1024
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static const unsigned long RTC_FREQ = 1024;
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static struct rtc_time rtc_alarm;
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static DEFINE_SPINLOCK(sa1100_rtc_lock);
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#define RCNR 0x00 /* RTC Count Register */
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#define RTAR 0x04 /* RTC Alarm Register */
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#define RTSR 0x08 /* RTC Status Register */
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#define RTTR 0x0c /* RTC Timer Trim Register */
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#define RTSR_HZE (1 << 3) /* HZ interrupt enable */
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#define RTSR_ALE (1 << 2) /* RTC alarm interrupt enable */
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#define RTSR_HZ (1 << 1) /* HZ rising-edge detected */
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#define RTSR_AL (1 << 0) /* RTC alarm detected */
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#define rtc_readl(sa1100_rtc, reg) \
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readl_relaxed((sa1100_rtc)->base + (reg))
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#define rtc_writel(sa1100_rtc, reg, value) \
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writel_relaxed((value), (sa1100_rtc)->base + (reg))
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struct sa1100_rtc {
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struct resource *ress;
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void __iomem *base;
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struct clk *clk;
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int irq_1Hz;
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int irq_Alrm;
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struct rtc_device *rtc;
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spinlock_t lock; /* Protects this structure */
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};
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/*
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* Calculate the next alarm time given the requested alarm time mask
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* and the current time.
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@ -75,22 +93,23 @@ static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now,
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static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id)
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{
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struct platform_device *pdev = to_platform_device(dev_id);
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struct rtc_device *rtc = platform_get_drvdata(pdev);
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struct sa1100_rtc *sa1100_rtc = platform_get_drvdata(pdev);
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unsigned int rtsr;
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unsigned long events = 0;
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spin_lock(&sa1100_rtc_lock);
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spin_lock(&sa1100_rtc->lock);
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rtsr = RTSR;
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/* clear interrupt sources */
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RTSR = 0;
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rtsr = rtc_readl(sa1100_rtc, RTSR);
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rtc_writel(sa1100_rtc, RTSR, 0);
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/* Fix for a nasty initialization problem the in SA11xx RTSR register.
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* See also the comments in sa1100_rtc_probe(). */
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if (rtsr & (RTSR_ALE | RTSR_HZE)) {
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/* This is the original code, before there was the if test
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* above. This code does not clear interrupts that were not
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* enabled. */
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RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2);
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rtc_writel(sa1100_rtc, RTSR, (RTSR_AL | RTSR_HZ) & (rtsr >> 2));
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} else {
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/* For some reason, it is possible to enter this routine
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* without interruptions enabled, it has been tested with
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@ -99,13 +118,13 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id)
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* This situation leads to an infinite "loop" of interrupt
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* routine calling and as a result the processor seems to
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* lock on its first call to open(). */
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RTSR = RTSR_AL | RTSR_HZ;
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rtc_writel(sa1100_rtc, RTSR, (RTSR_AL | RTSR_HZ));
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}
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/* clear alarm interrupt if it has occurred */
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if (rtsr & RTSR_AL)
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rtsr &= ~RTSR_ALE;
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RTSR = rtsr & (RTSR_ALE | RTSR_HZE);
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rtc_writel(sa1100_rtc, RTSR, rtsr & (RTSR_ALE | RTSR_HZE));
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/* update irq data & counter */
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if (rtsr & RTSR_AL)
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@ -113,86 +132,100 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id)
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if (rtsr & RTSR_HZ)
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events |= RTC_UF | RTC_IRQF;
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rtc_update_irq(rtc, 1, events);
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rtc_update_irq(sa1100_rtc->rtc, 1, events);
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spin_unlock(&sa1100_rtc_lock);
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spin_unlock(&sa1100_rtc->lock);
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return IRQ_HANDLED;
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}
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static int sa1100_rtc_open(struct device *dev)
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{
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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int ret;
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struct platform_device *plat_dev = to_platform_device(dev);
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struct rtc_device *rtc = platform_get_drvdata(plat_dev);
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ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, IRQF_DISABLED,
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"rtc 1Hz", dev);
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ret = request_irq(sa1100_rtc->irq_1Hz, sa1100_rtc_interrupt,
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IRQF_DISABLED, "rtc 1Hz", dev);
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if (ret) {
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dev_err(dev, "IRQ %d already in use.\n", IRQ_RTC1Hz);
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dev_err(dev, "IRQ %d already in use.\n", sa1100_rtc->irq_1Hz);
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goto fail_ui;
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}
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ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, IRQF_DISABLED,
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"rtc Alrm", dev);
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ret = request_irq(sa1100_rtc->irq_Alrm, sa1100_rtc_interrupt,
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IRQF_DISABLED, "rtc Alrm", dev);
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if (ret) {
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dev_err(dev, "IRQ %d already in use.\n", IRQ_RTCAlrm);
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dev_err(dev, "IRQ %d already in use.\n", sa1100_rtc->irq_Alrm);
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goto fail_ai;
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}
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rtc->max_user_freq = RTC_FREQ;
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rtc_irq_set_freq(rtc, NULL, RTC_FREQ);
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sa1100_rtc->rtc->max_user_freq = RTC_FREQ;
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rtc_irq_set_freq(sa1100_rtc->rtc, NULL, RTC_FREQ);
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return 0;
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fail_ai:
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free_irq(IRQ_RTC1Hz, dev);
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free_irq(sa1100_rtc->irq_1Hz, dev);
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fail_ui:
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return ret;
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}
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static void sa1100_rtc_release(struct device *dev)
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{
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spin_lock_irq(&sa1100_rtc_lock);
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RTSR = 0;
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spin_unlock_irq(&sa1100_rtc_lock);
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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free_irq(IRQ_RTCAlrm, dev);
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free_irq(IRQ_RTC1Hz, dev);
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spin_lock_irq(&sa1100_rtc->lock);
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rtc_writel(sa1100_rtc, RTSR, 0);
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spin_unlock_irq(&sa1100_rtc->lock);
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free_irq(sa1100_rtc->irq_Alrm, dev);
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free_irq(sa1100_rtc->irq_1Hz, dev);
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}
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static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
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{
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spin_lock_irq(&sa1100_rtc_lock);
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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unsigned int rtsr;
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spin_lock_irq(&sa1100_rtc->lock);
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rtsr = rtc_readl(sa1100_rtc, RTSR);
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if (enabled)
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RTSR |= RTSR_ALE;
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rtsr |= RTSR_ALE;
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else
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RTSR &= ~RTSR_ALE;
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spin_unlock_irq(&sa1100_rtc_lock);
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rtsr &= ~RTSR_ALE;
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rtc_writel(sa1100_rtc, RTSR, rtsr);
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spin_unlock_irq(&sa1100_rtc->lock);
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return 0;
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}
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static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm)
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{
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rtc_time_to_tm(RCNR, tm);
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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rtc_time_to_tm(rtc_readl(sa1100_rtc, RCNR), tm);
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return 0;
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}
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static int sa1100_rtc_set_time(struct device *dev, struct rtc_time *tm)
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{
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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unsigned long time;
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int ret;
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ret = rtc_tm_to_time(tm, &time);
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if (ret == 0)
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RCNR = time;
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rtc_writel(sa1100_rtc, RCNR, time);
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return ret;
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}
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static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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u32 rtsr;
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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unsigned long time;
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unsigned int rtsr;
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memcpy(&alrm->time, &rtc_alarm, sizeof(struct rtc_time));
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rtsr = RTSR;
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time = rtc_readl(sa1100_rtc, RCNR);
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rtc_time_to_tm(time, &alrm->time);
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rtsr = rtc_readl(sa1100_rtc, RTSR);
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alrm->enabled = (rtsr & RTSR_ALE) ? 1 : 0;
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alrm->pending = (rtsr & RTSR_AL) ? 1 : 0;
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return 0;
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@ -200,31 +233,39 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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struct rtc_time now_tm, alarm_tm;
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int ret;
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unsigned long time, alarm;
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unsigned int rtsr;
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spin_lock_irq(&sa1100_rtc_lock);
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spin_lock_irq(&sa1100_rtc->lock);
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now = RCNR;
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rtc_time_to_tm(now, &now_tm);
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rtc_next_alarm_time(&alarm_tm, &now_tm, alrm->time);
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rtc_tm_to_time(&alarm_tm, &time);
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RTAR = time;
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time = rtc_readl(sa1100_rtc, RCNR);
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rtc_time_to_tm(time, &now_tm);
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rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time);
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rtc_tm_to_time(&alarm_tm, &alarm);
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rtc_writel(sa1100_rtc, RTAR, alarm);
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rtsr = rtc_readl(sa1100_rtc, RTSR);
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if (alrm->enabled)
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RTSR |= RTSR_ALE;
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rtsr |= RTSR_ALE;
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else
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RTSR &= ~RTSR_ALE;
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rtsr &= ~RTSR_ALE;
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rtc_writel(sa1100_rtc, RTSR, rtsr);
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spin_unlock_irq(&sa1100_rtc_lock);
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spin_unlock_irq(&sa1100_rtc->lock);
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return ret;
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return 0;
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}
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static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq)
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{
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seq_printf(seq, "trim/divider\t\t: 0x%08x\n", (u32) RTTR);
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seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", (u32)RTSR);
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struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
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seq_printf(seq, "trim/divider\t\t: 0x%08x\n",
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rtc_readl(sa1100_rtc, RTTR));
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seq_printf(seq, "RTSR\t\t\t: 0x%08x\n",
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rtc_readl(sa1100_rtc, RTSR));
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return 0;
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}
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@ -241,7 +282,51 @@ static const struct rtc_class_ops sa1100_rtc_ops = {
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static int sa1100_rtc_probe(struct platform_device *pdev)
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{
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struct rtc_device *rtc;
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struct sa1100_rtc *sa1100_rtc;
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unsigned int rttr;
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int ret;
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sa1100_rtc = kzalloc(sizeof(struct sa1100_rtc), GFP_KERNEL);
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if (!sa1100_rtc)
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return -ENOMEM;
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spin_lock_init(&sa1100_rtc->lock);
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platform_set_drvdata(pdev, sa1100_rtc);
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ret = -ENXIO;
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sa1100_rtc->ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!sa1100_rtc->ress) {
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dev_err(&pdev->dev, "No I/O memory resource defined\n");
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goto err_ress;
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}
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sa1100_rtc->irq_1Hz = platform_get_irq(pdev, 0);
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if (sa1100_rtc->irq_1Hz < 0) {
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dev_err(&pdev->dev, "No 1Hz IRQ resource defined\n");
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goto err_ress;
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}
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sa1100_rtc->irq_Alrm = platform_get_irq(pdev, 1);
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if (sa1100_rtc->irq_Alrm < 0) {
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dev_err(&pdev->dev, "No alarm IRQ resource defined\n");
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goto err_ress;
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}
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ret = -ENOMEM;
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sa1100_rtc->base = ioremap(sa1100_rtc->ress->start,
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resource_size(sa1100_rtc->ress));
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if (!sa1100_rtc->base) {
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dev_err(&pdev->dev, "Unable to map pxa RTC I/O memory\n");
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goto err_map;
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}
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sa1100_rtc->clk = clk_get(&pdev->dev, NULL);
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if (IS_ERR(sa1100_rtc->clk)) {
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dev_err(&pdev->dev, "failed to find rtc clock source\n");
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ret = PTR_ERR(sa1100_rtc->clk);
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goto err_clk;
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}
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clk_prepare(sa1100_rtc->clk);
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clk_enable(sa1100_rtc->clk);
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/*
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* According to the manual we should be able to let RTTR be zero
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@ -250,24 +335,24 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
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* If the clock divider is uninitialized then reset it to the
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* default value to get the 1Hz clock.
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*/
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if (RTTR == 0) {
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RTTR = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16);
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dev_warn(&pdev->dev, "warning: "
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"initializing default clock divider/trim value\n");
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if (rtc_readl(sa1100_rtc, RTTR) == 0) {
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rttr = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16);
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rtc_writel(sa1100_rtc, RTTR, rttr);
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dev_warn(&pdev->dev, "warning: initializing default clock"
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" divider/trim value\n");
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/* The current RTC value probably doesn't make sense either */
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RCNR = 0;
|
||||
rtc_writel(sa1100_rtc, RCNR, 0);
|
||||
}
|
||||
|
||||
device_init_wakeup(&pdev->dev, 1);
|
||||
|
||||
rtc = rtc_device_register(pdev->name, &pdev->dev, &sa1100_rtc_ops,
|
||||
THIS_MODULE);
|
||||
|
||||
if (IS_ERR(rtc))
|
||||
return PTR_ERR(rtc);
|
||||
|
||||
platform_set_drvdata(pdev, rtc);
|
||||
|
||||
sa1100_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
|
||||
&sa1100_rtc_ops, THIS_MODULE);
|
||||
if (IS_ERR(sa1100_rtc->rtc)) {
|
||||
dev_err(&pdev->dev, "Failed to register RTC device -> %d\n",
|
||||
ret);
|
||||
goto err_rtc_reg;
|
||||
}
|
||||
/* Fix for a nasty initialization problem the in SA11xx RTSR register.
|
||||
* See also the comments in sa1100_rtc_interrupt().
|
||||
*
|
||||
|
|
@ -290,33 +375,46 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
|
|||
*
|
||||
* Notice that clearing bit 1 and 0 is accomplished by writting ONES to
|
||||
* the corresponding bits in RTSR. */
|
||||
RTSR = RTSR_AL | RTSR_HZ;
|
||||
rtc_writel(sa1100_rtc, RTSR, (RTSR_AL | RTSR_HZ));
|
||||
|
||||
return 0;
|
||||
|
||||
err_rtc_reg:
|
||||
err_clk:
|
||||
iounmap(sa1100_rtc->base);
|
||||
err_ress:
|
||||
err_map:
|
||||
kfree(sa1100_rtc);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int sa1100_rtc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct rtc_device *rtc = platform_get_drvdata(pdev);
|
||||
|
||||
if (rtc)
|
||||
rtc_device_unregister(rtc);
|
||||
struct sa1100_rtc *sa1100_rtc = platform_get_drvdata(pdev);
|
||||
|
||||
rtc_device_unregister(sa1100_rtc->rtc);
|
||||
clk_disable(sa1100_rtc->clk);
|
||||
clk_unprepare(sa1100_rtc->clk);
|
||||
iounmap(sa1100_rtc->base);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int sa1100_rtc_suspend(struct device *dev)
|
||||
{
|
||||
struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
|
||||
|
||||
if (device_may_wakeup(dev))
|
||||
enable_irq_wake(IRQ_RTCAlrm);
|
||||
enable_irq_wake(sa1100_rtc->irq_Alrm);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sa1100_rtc_resume(struct device *dev)
|
||||
{
|
||||
struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev);
|
||||
|
||||
if (device_may_wakeup(dev))
|
||||
disable_irq_wake(IRQ_RTCAlrm);
|
||||
disable_irq_wake(sa1100_rtc->irq_Alrm);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue