34800598b2
These are all specific to some driver. They are typically the platform side of a change in the drivers directory, such as adding a new driver or extending the interface to the platform. In cases where there is no maintainer for the driver, or the maintainer prefers to have the platform changes in the same branch as the driver changes, the patches to the drivers are included as well. A much smaller set of driver updates that depend on other branches getting merged first will be sent later. The new export of tegra_chip_uid conflicts with other changes in fuse.c. In rtc-sa1100.c, the global removal of IRQF_DISABLED conflicts with the cleanup of the interrupt handling of that driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIVAwUAT24/Y2CrR//JCVInAQLUdw//V4pKPuKempSe1kuD2MJfqldHwEVOlAUt of1IhLPAp8tpCscPDQ0yTy3ixquINg4jVnaDLL+E0quVbhLu6hlS2TYNKDEaVAAc cPUtVEUdja7Cfu4+bXX2vcWM/UyI6Ax7bsUUcwu4wFnEsjA6qOSu/jYY4jXDguHq ODGQSaSz0XQkfVBsWOlO8W/ejb0T3y+Ro3M/Vz5qJsMnZBR8R/i9aUYDFGiZ1GTn 3APHB7ALz6SS5/9SJS65PH16poBexcea5gyb3gnR1yt30kRmMTOAWrLC+JdyqFaO 7LHXW514+D1QbWV2gwNCWhQSLbgp9PWq/FXJtq4StW7tgNbDbj1d1Dc1GX+fvk2M bBih1yWoIVx6CZWFBQ7gsbqVHUZ/sW2fo76yb8K5dVPXx0fL5lEkv5Xwk3gxbqt5 lPE8+z+jiL5D+8RK1DZQu1PfxzaMwDZkJkVoGLCcdyM7FvnX3LIYf2bqbcp+zrQL lz9aht9C1k12R7feOX8emlluNd3eaKv/6jLrOasUP5wrJDam5hesSD5mLeTlAdxZ U8XJe4L24dFv15/yrMCzcyes5EmB3aS3nfb9TsSfq22IOKo2PCQLCnL6Z/rfM+1p mGu7BqdBnx3/8NkHdUrttMWjuPNh77MfPM6RO/E+TaBLHtwvKoLWJAHAYQNmt2xH IbGcyorBD5s= =pQ3X -----END PGP SIGNATURE----- Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull "ARM: driver specific updates" from Arnd Bergmann: "These are all specific to some driver. They are typically the platform side of a change in the drivers directory, such as adding a new driver or extending the interface to the platform. In cases where there is no maintainer for the driver, or the maintainer prefers to have the platform changes in the same branch as the driver changes, the patches to the drivers are included as well. A much smaller set of driver updates that depend on other branches getting merged first will be sent later. The new export of tegra_chip_uid conflicts with other changes in fuse.c. In rtc-sa1100.c, the global removal of IRQF_DISABLED conflicts with the cleanup of the interrupt handling of that driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de>" Fixed up aforementioned trivial conflicts. * tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (94 commits) ARM: SAMSUNG: change the name from s3c-sdhci to exynos4-sdhci mmc: sdhci-s3c: add platform data for the second capability ARM: SAMSUNG: support the second capability for samsung-soc ARM: EXYNOS: add support DMA for EXYNOS4X12 SoC ARM: EXYNOS: Add apb_pclk clkdev entry for mdma1 ARM: EXYNOS: Enable MDMA driver regulator: Remove bq24022 regulator driver rtc: sa1100: add OF support pxa: magician/hx4700: Convert to gpio-regulator from bq24022 ARM: OMAP3+: SmartReflex: fix error handling ARM: OMAP3+: SmartReflex: fix the use of debugfs_create_* API ARM: OMAP3+: SmartReflex: micro-optimization for sanity check ARM: OMAP3+: SmartReflex: misc cleanups ARM: OMAP3+: SmartReflex: move late_initcall() closer to its argument ARM: OMAP3+: SmartReflex: add missing platform_set_drvdata() ARM: OMAP3+: hwmod: add SmartReflex IRQs ARM: OMAP3+: SmartReflex: clear ERRCONFIG_VPBOUNDINTST only on a need ARM: OMAP3+: SmartReflex: Fix status masking in ERRCONFIG register ARM: OMAP3+: SmartReflex: Add a shutdown hook ARM: OMAP3+: SmartReflex Class3: disable errorgen before disable VP ... Conflicts: arch/arm/mach-tegra/Makefile arch/arm/mach-tegra/fuse.c drivers/rtc/rtc-sa1100.c
726 lines
17 KiB
C
726 lines
17 KiB
C
/* drivers/rtc/rtc-s3c.c
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*
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* Copyright (c) 2010 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* Copyright (c) 2004,2006 Simtec Electronics
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* Ben Dooks, <ben@simtec.co.uk>
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* http://armlinux.simtec.co.uk/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* S3C2410/S3C2440/S3C24XX Internal RTC Driver
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*/
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/string.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/bcd.h>
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#include <linux/clk.h>
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#include <linux/log2.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <mach/hardware.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <plat/regs-rtc.h>
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enum s3c_cpu_type {
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TYPE_S3C2410,
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TYPE_S3C2416,
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TYPE_S3C2443,
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TYPE_S3C64XX,
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};
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/* I have yet to find an S3C implementation with more than one
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* of these rtc blocks in */
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static struct resource *s3c_rtc_mem;
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static struct clk *rtc_clk;
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static void __iomem *s3c_rtc_base;
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static int s3c_rtc_alarmno = NO_IRQ;
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static int s3c_rtc_tickno = NO_IRQ;
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static bool wake_en;
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static enum s3c_cpu_type s3c_rtc_cpu_type;
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static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
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static void s3c_rtc_alarm_clk_enable(bool enable)
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{
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static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock);
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static bool alarm_clk_enabled;
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unsigned long irq_flags;
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spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags);
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if (enable) {
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if (!alarm_clk_enabled) {
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clk_enable(rtc_clk);
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alarm_clk_enabled = true;
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}
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} else {
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if (alarm_clk_enabled) {
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clk_disable(rtc_clk);
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alarm_clk_enabled = false;
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}
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}
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spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags);
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}
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/* IRQ Handlers */
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static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
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{
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struct rtc_device *rdev = id;
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clk_enable(rtc_clk);
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rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
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if (s3c_rtc_cpu_type == TYPE_S3C64XX)
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writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
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clk_disable(rtc_clk);
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s3c_rtc_alarm_clk_enable(false);
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return IRQ_HANDLED;
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}
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static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
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{
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struct rtc_device *rdev = id;
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clk_enable(rtc_clk);
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rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
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if (s3c_rtc_cpu_type == TYPE_S3C64XX)
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writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP);
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clk_disable(rtc_clk);
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return IRQ_HANDLED;
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}
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/* Update control registers */
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static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
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{
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unsigned int tmp;
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pr_debug("%s: aie=%d\n", __func__, enabled);
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clk_enable(rtc_clk);
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tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
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if (enabled)
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tmp |= S3C2410_RTCALM_ALMEN;
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writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
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clk_disable(rtc_clk);
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s3c_rtc_alarm_clk_enable(enabled);
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return 0;
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}
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static int s3c_rtc_setfreq(struct device *dev, int freq)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
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unsigned int tmp = 0;
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int val;
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if (!is_power_of_2(freq))
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return -EINVAL;
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clk_enable(rtc_clk);
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spin_lock_irq(&s3c_rtc_pie_lock);
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if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
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tmp = readb(s3c_rtc_base + S3C2410_TICNT);
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tmp &= S3C2410_TICNT_ENABLE;
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}
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val = (rtc_dev->max_user_freq / freq) - 1;
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if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
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tmp |= S3C2443_TICNT_PART(val);
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writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1);
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if (s3c_rtc_cpu_type == TYPE_S3C2416)
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writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2);
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} else {
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tmp |= val;
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}
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writel(tmp, s3c_rtc_base + S3C2410_TICNT);
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spin_unlock_irq(&s3c_rtc_pie_lock);
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clk_disable(rtc_clk);
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return 0;
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}
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/* Time read/write */
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static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
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{
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unsigned int have_retried = 0;
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void __iomem *base = s3c_rtc_base;
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clk_enable(rtc_clk);
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retry_get_time:
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rtc_tm->tm_min = readb(base + S3C2410_RTCMIN);
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rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR);
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rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE);
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rtc_tm->tm_mon = readb(base + S3C2410_RTCMON);
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rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR);
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rtc_tm->tm_sec = readb(base + S3C2410_RTCSEC);
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/* the only way to work out wether the system was mid-update
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* when we read it is to check the second counter, and if it
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* is zero, then we re-try the entire read
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*/
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if (rtc_tm->tm_sec == 0 && !have_retried) {
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have_retried = 1;
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goto retry_get_time;
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}
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rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
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rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
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rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
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rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
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rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
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rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
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rtc_tm->tm_year += 100;
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pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n",
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1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
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rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
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rtc_tm->tm_mon -= 1;
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clk_disable(rtc_clk);
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return rtc_valid_tm(rtc_tm);
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}
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static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
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{
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void __iomem *base = s3c_rtc_base;
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int year = tm->tm_year - 100;
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pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
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1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec);
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/* we get around y2k by simply not supporting it */
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if (year < 0 || year >= 100) {
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dev_err(dev, "rtc only supports 100 years\n");
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return -EINVAL;
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}
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clk_enable(rtc_clk);
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writeb(bin2bcd(tm->tm_sec), base + S3C2410_RTCSEC);
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writeb(bin2bcd(tm->tm_min), base + S3C2410_RTCMIN);
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writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR);
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writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE);
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writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON);
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writeb(bin2bcd(year), base + S3C2410_RTCYEAR);
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clk_disable(rtc_clk);
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return 0;
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}
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static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct rtc_time *alm_tm = &alrm->time;
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void __iomem *base = s3c_rtc_base;
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unsigned int alm_en;
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clk_enable(rtc_clk);
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alm_tm->tm_sec = readb(base + S3C2410_ALMSEC);
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alm_tm->tm_min = readb(base + S3C2410_ALMMIN);
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alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR);
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alm_tm->tm_mon = readb(base + S3C2410_ALMMON);
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alm_tm->tm_mday = readb(base + S3C2410_ALMDATE);
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alm_tm->tm_year = readb(base + S3C2410_ALMYEAR);
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alm_en = readb(base + S3C2410_RTCALM);
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alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
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pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
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alm_en,
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1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
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alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
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/* decode the alarm enable field */
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if (alm_en & S3C2410_RTCALM_SECEN)
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alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
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else
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alm_tm->tm_sec = -1;
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if (alm_en & S3C2410_RTCALM_MINEN)
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alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
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else
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alm_tm->tm_min = -1;
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if (alm_en & S3C2410_RTCALM_HOUREN)
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alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
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else
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alm_tm->tm_hour = -1;
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if (alm_en & S3C2410_RTCALM_DAYEN)
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alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
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else
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alm_tm->tm_mday = -1;
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if (alm_en & S3C2410_RTCALM_MONEN) {
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alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
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alm_tm->tm_mon -= 1;
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} else {
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alm_tm->tm_mon = -1;
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}
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if (alm_en & S3C2410_RTCALM_YEAREN)
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alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
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else
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alm_tm->tm_year = -1;
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clk_disable(rtc_clk);
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return 0;
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}
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static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct rtc_time *tm = &alrm->time;
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void __iomem *base = s3c_rtc_base;
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unsigned int alrm_en;
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clk_enable(rtc_clk);
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pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
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alrm->enabled,
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1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec);
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alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
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writeb(0x00, base + S3C2410_RTCALM);
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if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
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alrm_en |= S3C2410_RTCALM_SECEN;
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writeb(bin2bcd(tm->tm_sec), base + S3C2410_ALMSEC);
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}
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if (tm->tm_min < 60 && tm->tm_min >= 0) {
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alrm_en |= S3C2410_RTCALM_MINEN;
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writeb(bin2bcd(tm->tm_min), base + S3C2410_ALMMIN);
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}
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if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
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alrm_en |= S3C2410_RTCALM_HOUREN;
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writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR);
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}
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pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
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writeb(alrm_en, base + S3C2410_RTCALM);
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s3c_rtc_setaie(dev, alrm->enabled);
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clk_disable(rtc_clk);
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return 0;
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}
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static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
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{
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unsigned int ticnt;
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clk_enable(rtc_clk);
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if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
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ticnt = readw(s3c_rtc_base + S3C2410_RTCCON);
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ticnt &= S3C64XX_RTCCON_TICEN;
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} else {
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ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
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ticnt &= S3C2410_TICNT_ENABLE;
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}
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seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
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clk_disable(rtc_clk);
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return 0;
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}
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static const struct rtc_class_ops s3c_rtcops = {
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.read_time = s3c_rtc_gettime,
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.set_time = s3c_rtc_settime,
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.read_alarm = s3c_rtc_getalarm,
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.set_alarm = s3c_rtc_setalarm,
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.proc = s3c_rtc_proc,
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.alarm_irq_enable = s3c_rtc_setaie,
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};
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static void s3c_rtc_enable(struct platform_device *pdev, int en)
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{
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void __iomem *base = s3c_rtc_base;
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unsigned int tmp;
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if (s3c_rtc_base == NULL)
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return;
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clk_enable(rtc_clk);
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if (!en) {
|
|
tmp = readw(base + S3C2410_RTCCON);
|
|
if (s3c_rtc_cpu_type == TYPE_S3C64XX)
|
|
tmp &= ~S3C64XX_RTCCON_TICEN;
|
|
tmp &= ~S3C2410_RTCCON_RTCEN;
|
|
writew(tmp, base + S3C2410_RTCCON);
|
|
|
|
if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
|
|
tmp = readb(base + S3C2410_TICNT);
|
|
tmp &= ~S3C2410_TICNT_ENABLE;
|
|
writeb(tmp, base + S3C2410_TICNT);
|
|
}
|
|
} else {
|
|
/* re-enable the device, and check it is ok */
|
|
|
|
if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
|
|
dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
|
|
|
|
tmp = readw(base + S3C2410_RTCCON);
|
|
writew(tmp | S3C2410_RTCCON_RTCEN,
|
|
base + S3C2410_RTCCON);
|
|
}
|
|
|
|
if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
|
|
dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
|
|
|
|
tmp = readw(base + S3C2410_RTCCON);
|
|
writew(tmp & ~S3C2410_RTCCON_CNTSEL,
|
|
base + S3C2410_RTCCON);
|
|
}
|
|
|
|
if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
|
|
dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
|
|
|
|
tmp = readw(base + S3C2410_RTCCON);
|
|
writew(tmp & ~S3C2410_RTCCON_CLKRST,
|
|
base + S3C2410_RTCCON);
|
|
}
|
|
}
|
|
clk_disable(rtc_clk);
|
|
}
|
|
|
|
static int __devexit s3c_rtc_remove(struct platform_device *dev)
|
|
{
|
|
struct rtc_device *rtc = platform_get_drvdata(dev);
|
|
|
|
free_irq(s3c_rtc_alarmno, rtc);
|
|
free_irq(s3c_rtc_tickno, rtc);
|
|
|
|
platform_set_drvdata(dev, NULL);
|
|
rtc_device_unregister(rtc);
|
|
|
|
s3c_rtc_setaie(&dev->dev, 0);
|
|
|
|
clk_put(rtc_clk);
|
|
rtc_clk = NULL;
|
|
|
|
iounmap(s3c_rtc_base);
|
|
release_resource(s3c_rtc_mem);
|
|
kfree(s3c_rtc_mem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id s3c_rtc_dt_match[];
|
|
|
|
static inline int s3c_rtc_get_driver_data(struct platform_device *pdev)
|
|
{
|
|
#ifdef CONFIG_OF
|
|
if (pdev->dev.of_node) {
|
|
const struct of_device_id *match;
|
|
match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
|
|
return match->data;
|
|
}
|
|
#endif
|
|
return platform_get_device_id(pdev)->driver_data;
|
|
}
|
|
|
|
static int __devinit s3c_rtc_probe(struct platform_device *pdev)
|
|
{
|
|
struct rtc_device *rtc;
|
|
struct rtc_time rtc_tm;
|
|
struct resource *res;
|
|
int ret;
|
|
int tmp;
|
|
|
|
pr_debug("%s: probe=%p\n", __func__, pdev);
|
|
|
|
/* find the IRQs */
|
|
|
|
s3c_rtc_tickno = platform_get_irq(pdev, 1);
|
|
if (s3c_rtc_tickno < 0) {
|
|
dev_err(&pdev->dev, "no irq for rtc tick\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
s3c_rtc_alarmno = platform_get_irq(pdev, 0);
|
|
if (s3c_rtc_alarmno < 0) {
|
|
dev_err(&pdev->dev, "no irq for alarm\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
pr_debug("s3c2410_rtc: tick irq %d, alarm irq %d\n",
|
|
s3c_rtc_tickno, s3c_rtc_alarmno);
|
|
|
|
/* get the memory region */
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res == NULL) {
|
|
dev_err(&pdev->dev, "failed to get memory region resource\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
s3c_rtc_mem = request_mem_region(res->start, resource_size(res),
|
|
pdev->name);
|
|
|
|
if (s3c_rtc_mem == NULL) {
|
|
dev_err(&pdev->dev, "failed to reserve memory region\n");
|
|
ret = -ENOENT;
|
|
goto err_nores;
|
|
}
|
|
|
|
s3c_rtc_base = ioremap(res->start, resource_size(res));
|
|
if (s3c_rtc_base == NULL) {
|
|
dev_err(&pdev->dev, "failed ioremap()\n");
|
|
ret = -EINVAL;
|
|
goto err_nomap;
|
|
}
|
|
|
|
rtc_clk = clk_get(&pdev->dev, "rtc");
|
|
if (IS_ERR(rtc_clk)) {
|
|
dev_err(&pdev->dev, "failed to find rtc clock source\n");
|
|
ret = PTR_ERR(rtc_clk);
|
|
rtc_clk = NULL;
|
|
goto err_clk;
|
|
}
|
|
|
|
clk_enable(rtc_clk);
|
|
|
|
/* check to see if everything is setup correctly */
|
|
|
|
s3c_rtc_enable(pdev, 1);
|
|
|
|
pr_debug("s3c2410_rtc: RTCCON=%02x\n",
|
|
readw(s3c_rtc_base + S3C2410_RTCCON));
|
|
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
|
|
/* register RTC and exit */
|
|
|
|
rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops,
|
|
THIS_MODULE);
|
|
|
|
if (IS_ERR(rtc)) {
|
|
dev_err(&pdev->dev, "cannot attach rtc\n");
|
|
ret = PTR_ERR(rtc);
|
|
goto err_nortc;
|
|
}
|
|
|
|
s3c_rtc_cpu_type = s3c_rtc_get_driver_data(pdev);
|
|
|
|
/* Check RTC Time */
|
|
|
|
s3c_rtc_gettime(NULL, &rtc_tm);
|
|
|
|
if (rtc_valid_tm(&rtc_tm)) {
|
|
rtc_tm.tm_year = 100;
|
|
rtc_tm.tm_mon = 0;
|
|
rtc_tm.tm_mday = 1;
|
|
rtc_tm.tm_hour = 0;
|
|
rtc_tm.tm_min = 0;
|
|
rtc_tm.tm_sec = 0;
|
|
|
|
s3c_rtc_settime(NULL, &rtc_tm);
|
|
|
|
dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
|
|
}
|
|
|
|
if (s3c_rtc_cpu_type != TYPE_S3C2410)
|
|
rtc->max_user_freq = 32768;
|
|
else
|
|
rtc->max_user_freq = 128;
|
|
|
|
if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
|
|
tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
|
|
tmp |= S3C2443_RTCCON_TICSEL;
|
|
writew(tmp, s3c_rtc_base + S3C2410_RTCCON);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, rtc);
|
|
|
|
s3c_rtc_setfreq(&pdev->dev, 1);
|
|
|
|
ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
|
|
0, "s3c2410-rtc alarm", rtc);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
|
|
goto err_alarm_irq;
|
|
}
|
|
|
|
ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
|
|
0, "s3c2410-rtc tick", rtc);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
|
|
free_irq(s3c_rtc_alarmno, rtc);
|
|
goto err_tick_irq;
|
|
}
|
|
|
|
clk_disable(rtc_clk);
|
|
|
|
return 0;
|
|
|
|
err_tick_irq:
|
|
free_irq(s3c_rtc_alarmno, rtc);
|
|
|
|
err_alarm_irq:
|
|
platform_set_drvdata(pdev, NULL);
|
|
rtc_device_unregister(rtc);
|
|
|
|
err_nortc:
|
|
s3c_rtc_enable(pdev, 0);
|
|
clk_disable(rtc_clk);
|
|
clk_put(rtc_clk);
|
|
|
|
err_clk:
|
|
iounmap(s3c_rtc_base);
|
|
|
|
err_nomap:
|
|
release_resource(s3c_rtc_mem);
|
|
|
|
err_nores:
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
/* RTC Power management control */
|
|
|
|
static int ticnt_save, ticnt_en_save;
|
|
|
|
static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
clk_enable(rtc_clk);
|
|
/* save TICNT for anyone using periodic interrupts */
|
|
ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
|
|
if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
|
|
ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON);
|
|
ticnt_en_save &= S3C64XX_RTCCON_TICEN;
|
|
}
|
|
s3c_rtc_enable(pdev, 0);
|
|
|
|
if (device_may_wakeup(&pdev->dev) && !wake_en) {
|
|
if (enable_irq_wake(s3c_rtc_alarmno) == 0)
|
|
wake_en = true;
|
|
else
|
|
dev_err(&pdev->dev, "enable_irq_wake failed\n");
|
|
}
|
|
clk_disable(rtc_clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c_rtc_resume(struct platform_device *pdev)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
clk_enable(rtc_clk);
|
|
s3c_rtc_enable(pdev, 1);
|
|
writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
|
|
if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) {
|
|
tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
|
|
writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
|
|
}
|
|
|
|
if (device_may_wakeup(&pdev->dev) && wake_en) {
|
|
disable_irq_wake(s3c_rtc_alarmno);
|
|
wake_en = false;
|
|
}
|
|
clk_disable(rtc_clk);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define s3c_rtc_suspend NULL
|
|
#define s3c_rtc_resume NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id s3c_rtc_dt_match[] = {
|
|
{
|
|
.compatible = "samsung,s3c2410-rtc"
|
|
.data = TYPE_S3C2410,
|
|
}, {
|
|
.compatible = "samsung,s3c2416-rtc"
|
|
.data = TYPE_S3C2416,
|
|
}, {
|
|
.compatible = "samsung,s3c2443-rtc"
|
|
.data = TYPE_S3C2443,
|
|
}, {
|
|
.compatible = "samsung,s3c6410-rtc"
|
|
.data = TYPE_S3C64XX,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
|
|
#else
|
|
#define s3c_rtc_dt_match NULL
|
|
#endif
|
|
|
|
static struct platform_device_id s3c_rtc_driver_ids[] = {
|
|
{
|
|
.name = "s3c2410-rtc",
|
|
.driver_data = TYPE_S3C2410,
|
|
}, {
|
|
.name = "s3c2416-rtc",
|
|
.driver_data = TYPE_S3C2416,
|
|
}, {
|
|
.name = "s3c2443-rtc",
|
|
.driver_data = TYPE_S3C2443,
|
|
}, {
|
|
.name = "s3c64xx-rtc",
|
|
.driver_data = TYPE_S3C64XX,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
|
|
|
|
static struct platform_driver s3c_rtc_driver = {
|
|
.probe = s3c_rtc_probe,
|
|
.remove = __devexit_p(s3c_rtc_remove),
|
|
.suspend = s3c_rtc_suspend,
|
|
.resume = s3c_rtc_resume,
|
|
.id_table = s3c_rtc_driver_ids,
|
|
.driver = {
|
|
.name = "s3c-rtc",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = s3c_rtc_dt_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(s3c_rtc_driver);
|
|
|
|
MODULE_DESCRIPTION("Samsung S3C RTC Driver");
|
|
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:s3c2410-rtc");
|