[03/11] Revert "RTC: sa1100: support sa1100, pxa and mmp soc families"

Message ID	E1RntzR-0002pR-Br@rmk-PC.arm.linux.org.uk
State	Accepted
Headers	show Return-Path: <rtc-linux+bncCOvY4vTHFxD-7-D4BBoEEtcpjg@googlegroups.com> Received-SPF: pass (google.com: best guess record for domain of rmk+rtc-linux=googlegroups.com@arm.linux.org.uk designates 78.32.30.218 as permitted sender) client-ip=78.32.30.218; In-Reply-To: <20120119153149.GB1068@n2100.arm.linux.org.uk> References: <20120119153149.GB1068@n2100.arm.linux.org.uk> From: Russell King - ARM Linux <linux@arm.linux.org.uk> To: Alessandro Zummo <a.zummo@towertech.it>, Eric Miao <eric.y.miao@gmail.com>, Haojian Zhuang <haojian.zhuang@marvell.com> Cc: linux-arm-kernel@lists.infradead.org,rtc-linux@googlegroups.com Subject: [rtc-linux] [PATCH 03/11] Revert "RTC: sa1100: support sa1100, pxa and mmp soc families" MIME-Version: 1.0 Message-Id: <E1RntzR-0002pR-Br@rmk-PC.arm.linux.org.uk> Sender: rtc-linux@googlegroups.com Date: Thu, 19 Jan 2012 15:33:25 +0000 Reply-To: rtc-linux@googlegroups.com Precedence: list Mailing-list: list rtc-linux@googlegroups.com; contact rtc-linux+owners@googlegroups.com Content-Disposition: inline Content-Type: text/plain; charset=ISO-8859-1

diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c index 18fd177..5bc1312 100644 --- a/arch/arm/mach-pxa/devices.c +++ b/arch/arm/mach-pxa/devices.c @@ -415,29 +415,9 @@ static struct resource pxa_rtc_resources[] = { }, }; -static struct resource sa1100_rtc_resources[] = { - [0] = { - .start = 0x40900000, - .end = 0x409000ff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_RTC1Hz, - .end = IRQ_RTC1Hz, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_RTCAlrm, - .end = IRQ_RTCAlrm, - .flags = IORESOURCE_IRQ, - }, -}; - struct platform_device sa1100_device_rtc = { .name = "sa1100-rtc", .id = -1, - .num_resources = ARRAY_SIZE(sa1100_rtc_resources), - .resource = sa1100_rtc_resources, }; struct platform_device pxa_device_rtc = { diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c index e3a28ca..a7c0df6 100644 --- a/arch/arm/mach-sa1100/generic.c +++ b/arch/arm/mach-sa1100/generic.c @@ -350,29 +350,9 @@ void sa11x0_register_irda(struct irda_platform_data *irda) sa11x0_register_device(&sa11x0ir_device, irda); } -static struct resource sa11x0rtc_resources[] = { - [0] = { - .start = 0x90010000, - .end = 0x900100ff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_RTC1Hz, - .end = IRQ_RTC1Hz, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_RTCAlrm, - .end = IRQ_RTCAlrm, - .flags = IORESOURCE_IRQ, - }, -}; - static struct platform_device sa11x0rtc_device = { .name = "sa1100-rtc", .id = -1, - .resource = sa11x0rtc_resources, - .num_resources = ARRAY_SIZE(sa11x0rtc_resources), }; static struct platform_device *sa11x0_devices[] __initdata = { diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index e19a403..3a125b8 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -774,7 +774,7 @@ config RTC_DRV_EP93XX config RTC_DRV_SA1100 tristate "SA11x0/PXA2xx" - depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP + depends on ARCH_SA1100 || ARCH_PXA help If you say Y here you will get access to the real time clock built into your SA11x0 or PXA2xx CPU. diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index 4595d3e..9683daf 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -27,42 +27,24 @@ #include <linux/init.h> #include <linux/fs.h> #include <linux/interrupt.h> +#include <linux/string.h> #include <linux/pm.h> -#include <linux/slab.h> -#include <linux/clk.h> -#include <linux/io.h> +#include <linux/bitops.h> #include <mach/hardware.h> #include <asm/irq.h> +#ifdef CONFIG_ARCH_PXA +#include <mach/regs-rtc.h> +#endif + #define RTC_DEF_DIVIDER (32768 - 1) #define RTC_DEF_TRIM 0 -#define RTC_FREQ 1024 - -#define RCNR 0x00 /* RTC Count Register */ -#define RTAR 0x04 /* RTC Alarm Register */ -#define RTSR 0x08 /* RTC Status Register */ -#define RTTR 0x0c /* RTC Timer Trim Register */ - -#define RTSR_HZE (1 << 3) /* HZ interrupt enable */ -#define RTSR_ALE (1 << 2) /* RTC alarm interrupt enable */ -#define RTSR_HZ (1 << 1) /* HZ rising-edge detected */ -#define RTSR_AL (1 << 0) /* RTC alarm detected */ - -#define rtc_readl(sa1100_rtc, reg) \ - readl_relaxed((sa1100_rtc)->base + (reg)) -#define rtc_writel(sa1100_rtc, reg, value) \ - writel_relaxed((value), (sa1100_rtc)->base + (reg)) - -struct sa1100_rtc { - struct resource *ress; - void __iomem *base; - struct clk *clk; - int irq_1Hz; - int irq_Alrm; - struct rtc_device *rtc; - spinlock_t lock; /* Protects this structure */ -}; + +static const unsigned long RTC_FREQ = 1024; +static struct rtc_time rtc_alarm; +static DEFINE_SPINLOCK(sa1100_rtc_lock); + /* * Calculate the next alarm time given the requested alarm time mask * and the current time. @@ -93,23 +75,22 @@ static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) { struct platform_device *pdev = to_platform_device(dev_id); - struct sa1100_rtc *sa1100_rtc = platform_get_drvdata(pdev); + struct rtc_device *rtc = platform_get_drvdata(pdev); unsigned int rtsr; unsigned long events = 0; - spin_lock(&sa1100_rtc->lock); + spin_lock(&sa1100_rtc_lock); + rtsr = RTSR; /* clear interrupt sources */ - rtsr = rtc_readl(sa1100_rtc, RTSR); - rtc_writel(sa1100_rtc, RTSR, 0); - + RTSR = 0; /* Fix for a nasty initialization problem the in SA11xx RTSR register. * See also the comments in sa1100_rtc_probe(). */ if (rtsr & (RTSR_ALE | RTSR_HZE)) { /* This is the original code, before there was the if test * above. This code does not clear interrupts that were not * enabled. */ - rtc_writel(sa1100_rtc, RTSR, (RTSR_AL | RTSR_HZ) & (rtsr >> 2)); + RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2); } else { /* For some reason, it is possible to enter this routine * without interruptions enabled, it has been tested with @@ -118,13 +99,13 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) * This situation leads to an infinite "loop" of interrupt * routine calling and as a result the processor seems to * lock on its first call to open(). */ - rtc_writel(sa1100_rtc, RTSR, (RTSR_AL | RTSR_HZ)); + RTSR = RTSR_AL | RTSR_HZ; } /* clear alarm interrupt if it has occurred */ if (rtsr & RTSR_AL) rtsr &= ~RTSR_ALE; - rtc_writel(sa1100_rtc, RTSR, rtsr & (RTSR_ALE | RTSR_HZE)); + RTSR = rtsr & (RTSR_ALE | RTSR_HZE); /* update irq data & counter */ if (rtsr & RTSR_AL) @@ -132,100 +113,86 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) if (rtsr & RTSR_HZ) events |= RTC_UF | RTC_IRQF; - rtc_update_irq(sa1100_rtc->rtc, 1, events); + rtc_update_irq(rtc, 1, events); - spin_unlock(&sa1100_rtc->lock); + spin_unlock(&sa1100_rtc_lock); return IRQ_HANDLED; } static int sa1100_rtc_open(struct device *dev) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); int ret; + struct platform_device *plat_dev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(plat_dev); - ret = request_irq(sa1100_rtc->irq_1Hz, sa1100_rtc_interrupt, - IRQF_DISABLED, "rtc 1Hz", dev); + ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, IRQF_DISABLED, + "rtc 1Hz", dev); if (ret) { - dev_err(dev, "IRQ %d already in use.\n", sa1100_rtc->irq_1Hz); + dev_err(dev, "IRQ %d already in use.\n", IRQ_RTC1Hz); goto fail_ui; } - ret = request_irq(sa1100_rtc->irq_Alrm, sa1100_rtc_interrupt, - IRQF_DISABLED, "rtc Alrm", dev); + ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, IRQF_DISABLED, + "rtc Alrm", dev); if (ret) { - dev_err(dev, "IRQ %d already in use.\n", sa1100_rtc->irq_Alrm); + dev_err(dev, "IRQ %d already in use.\n", IRQ_RTCAlrm); goto fail_ai; } - sa1100_rtc->rtc->max_user_freq = RTC_FREQ; - rtc_irq_set_freq(sa1100_rtc->rtc, NULL, RTC_FREQ); + rtc->max_user_freq = RTC_FREQ; + rtc_irq_set_freq(rtc, NULL, RTC_FREQ); return 0; fail_ai: - free_irq(sa1100_rtc->irq_1Hz, dev); + free_irq(IRQ_RTC1Hz, dev); fail_ui: return ret; } static void sa1100_rtc_release(struct device *dev) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); + spin_lock_irq(&sa1100_rtc_lock); + RTSR = 0; + spin_unlock_irq(&sa1100_rtc_lock); - spin_lock_irq(&sa1100_rtc->lock); - rtc_writel(sa1100_rtc, RTSR, 0); - spin_unlock_irq(&sa1100_rtc->lock); - - free_irq(sa1100_rtc->irq_Alrm, dev); - free_irq(sa1100_rtc->irq_1Hz, dev); + free_irq(IRQ_RTCAlrm, dev); + free_irq(IRQ_RTC1Hz, dev); } static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); - unsigned int rtsr; - - spin_lock_irq(&sa1100_rtc->lock); - - rtsr = rtc_readl(sa1100_rtc, RTSR); + spin_lock_irq(&sa1100_rtc_lock); if (enabled) - rtsr |= RTSR_ALE; + RTSR |= RTSR_ALE; else - rtsr &= ~RTSR_ALE; - rtc_writel(sa1100_rtc, RTSR, rtsr); - - spin_unlock_irq(&sa1100_rtc->lock); + RTSR &= ~RTSR_ALE; + spin_unlock_irq(&sa1100_rtc_lock); return 0; } static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); - - rtc_time_to_tm(rtc_readl(sa1100_rtc, RCNR), tm); + rtc_time_to_tm(RCNR, tm); return 0; } static int sa1100_rtc_set_time(struct device *dev, struct rtc_time *tm) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); unsigned long time; int ret; ret = rtc_tm_to_time(tm, &time); if (ret == 0) - rtc_writel(sa1100_rtc, RCNR, time); + RCNR = time; return ret; } static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); - unsigned long time; - unsigned int rtsr; + u32 rtsr; - time = rtc_readl(sa1100_rtc, RCNR); - rtc_time_to_tm(time, &alrm->time); - rtsr = rtc_readl(sa1100_rtc, RTSR); + memcpy(&alrm->time, &rtc_alarm, sizeof(struct rtc_time)); + rtsr = RTSR; alrm->enabled = (rtsr & RTSR_ALE) ? 1 : 0; alrm->pending = (rtsr & RTSR_AL) ? 1 : 0; return 0; @@ -233,39 +200,31 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); struct rtc_time now_tm, alarm_tm; - unsigned long time, alarm; - unsigned int rtsr; - - spin_lock_irq(&sa1100_rtc->lock); + int ret; - time = rtc_readl(sa1100_rtc, RCNR); - rtc_time_to_tm(time, &now_tm); - rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time); - rtc_tm_to_time(&alarm_tm, &alarm); - rtc_writel(sa1100_rtc, RTAR, alarm); + spin_lock_irq(&sa1100_rtc_lock); - rtsr = rtc_readl(sa1100_rtc, RTSR); + now = RCNR; + rtc_time_to_tm(now, &now_tm); + rtc_next_alarm_time(&alarm_tm, &now_tm, alrm->time); + rtc_tm_to_time(&alarm_tm, &time); + RTAR = time; if (alrm->enabled) - rtsr |= RTSR_ALE; + RTSR |= RTSR_ALE; else - rtsr &= ~RTSR_ALE; - rtc_writel(sa1100_rtc, RTSR, rtsr); + RTSR &= ~RTSR_ALE; - spin_unlock_irq(&sa1100_rtc->lock); + spin_unlock_irq(&sa1100_rtc_lock); - return 0; + return ret; } static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq) { - struct sa1100_rtc *sa1100_rtc = dev_get_drvdata(dev); + seq_printf(seq, "trim/divider\t\t: 0x%08x\n", (u32) RTTR); + seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", (u32)RTSR); - seq_printf(seq, "trim/divider\t\t: 0x%08x\n", - rtc_readl(sa1100_rtc, RTTR)); - seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", - rtc_readl(sa1100_rtc, RTSR)); return 0; } @@ -282,51 +241,7 @@ static const struct rtc_class_ops sa1100_rtc_ops = { static int sa1100_rtc_probe(struct platform_device *pdev) { - struct sa1100_rtc *sa1100_rtc; - unsigned int rttr; - int ret; - - sa1100_rtc = kzalloc(sizeof(struct sa1100_rtc), GFP_KERNEL); - if (!sa1100_rtc) - return -ENOMEM; - - spin_lock_init(&sa1100_rtc->lock); - platform_set_drvdata(pdev, sa1100_rtc); - - ret = -ENXIO; - sa1100_rtc->ress = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!sa1100_rtc->ress) { - dev_err(&pdev->dev, "No I/O memory resource defined\n"); - goto err_ress; - } - - sa1100_rtc->irq_1Hz = platform_get_irq(pdev, 0); - if (sa1100_rtc->irq_1Hz < 0) { - dev_err(&pdev->dev, "No 1Hz IRQ resource defined\n"); - goto err_ress; - } - sa1100_rtc->irq_Alrm = platform_get_irq(pdev, 1); - if (sa1100_rtc->irq_Alrm < 0) { - dev_err(&pdev->dev, "No alarm IRQ resource defined\n"); - goto err_ress; - } - - ret = -ENOMEM; - sa1100_rtc->base = ioremap(sa1100_rtc->ress->start, - resource_size(sa1100_rtc->ress)); - if (!sa1100_rtc->base) { - dev_err(&pdev->dev, "Unable to map pxa RTC I/O memory\n"); - goto err_map; - } - - sa1100_rtc->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(sa1100_rtc->clk)) { - dev_err(&pdev->dev, "failed to find rtc clock source\n"); - ret = PTR_ERR(sa1100_rtc->clk); - goto err_clk; - } - clk_prepare(sa1100_rtc->clk); - clk_enable(sa1100_rtc->clk); + struct rtc_device *rtc; /* * According to the manual we should be able to let RTTR be zero @@ -335,24 +250,24 @@ static int sa1100_rtc_probe(struct platform_device *pdev) * If the clock divider is uninitialized then reset it to the * default value to get the 1Hz clock. */ - if (rtc_readl(sa1100_rtc, RTTR) == 0) { - rttr = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16); - rtc_writel(sa1100_rtc, RTTR, rttr); - dev_warn(&pdev->dev, "warning: initializing default clock" - " divider/trim value\n"); + if (RTTR == 0) { + RTTR = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16); + dev_warn(&pdev->dev, "warning: " + "initializing default clock divider/trim value\n"); /* The current RTC value probably doesn't make sense either */ - rtc_writel(sa1100_rtc, RCNR, 0); + RCNR = 0; } device_init_wakeup(&pdev->dev, 1); - 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; - } + 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); + /* Fix for a nasty initialization problem the in SA11xx RTSR register. * See also the comments in sa1100_rtc_interrupt(). * @@ -375,46 +290,33 @@ 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. */ - rtc_writel(sa1100_rtc, RTSR, (RTSR_AL | RTSR_HZ)); + 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 sa1100_rtc *sa1100_rtc = platform_get_drvdata(pdev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + + if (rtc) + rtc_device_unregister(rtc); - 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(sa1100_rtc->irq_Alrm); + enable_irq_wake(IRQ_RTCAlrm); 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(sa1100_rtc->irq_Alrm); + disable_irq_wake(IRQ_RTCAlrm); return 0; }

[03/11] Revert "RTC: sa1100: support sa1100, pxa and mmp soc families"

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