From: Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> To: rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Cc: Alessandro Zummo <a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org>, Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Subject: [PATCH 6/9] rtc: stmp3xxx: add sysfs entries for persistent regs Date: Mon, 4 Mar 2013 15:05:45 +0100 [thread overview] Message-ID: <1362405948-12992-7-git-send-email-s.trumtrar@pengutronix.de> (raw) In-Reply-To: <1362405948-12992-1-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> The persistent registers 1-5 are completely software defined. To have access from userspace, export them via sysfs. Signed-off-by: Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> --- drivers/rtc/rtc-stmp3xxx.c | 69 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c index 936b0ca..16b45c8 100644 --- a/drivers/rtc/rtc-stmp3xxx.c +++ b/drivers/rtc/rtc-stmp3xxx.c @@ -67,6 +67,8 @@ /* missing bitmask in headers */ #define STMP3XXX_RTC_PERSISTENT1_FORCE_UPDATER 0x80000000 +#define STMP3XXX_RTC_PERSISTENT_LEN (0xC0 - STMP3XXX_RTC_PERSISTENT1) + enum clock_source { MXS_UNKNOWN, MXS_OSC_24M, MXS_OSC_32K, MXS_OSC_32K768 }; struct stmp3xxx_rtc_data { @@ -74,6 +76,9 @@ struct stmp3xxx_rtc_data { void __iomem *io; int irq_alarm; enum clock_source clk_src; +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) + struct bin_attribute *persist; +#endif }; #if IS_ENABLED(CONFIG_STMP3XXX_RTC_WATCHDOG) @@ -262,6 +267,42 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) return 0; } +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) +static ssize_t stmp3xxx_rtc_persist_read(struct file *filep, + struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t size) +{ + struct rtc_device *rtc = container_of(kobj, struct rtc_device, + dev.kobj); + struct device *dev = rtc->dev.parent; + struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); + ssize_t count; + + for (count = 0; size; size--, off++, count++) + *buf++ = readl(rtc_data->io + STMP3XXX_RTC_PERSISTENT1 + off); + + return count; +} + +static ssize_t stmp3xxx_rtc_persist_write(struct file *filep, + struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t size) +{ + struct rtc_device *rtc = container_of(kobj, struct rtc_device, + dev.kobj); + struct device *dev = rtc->dev.parent; + struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); + ssize_t count; + + for (count = 0; size; size--, off++, count++) + writel(*buf++, rtc_data->io + STMP3XXX_RTC_PERSISTENT1 + off); + + return count; +} +#endif + static struct rtc_class_ops stmp3xxx_rtc_ops = { .alarm_irq_enable = stmp3xxx_alarm_irq_enable, @@ -278,6 +319,11 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev) if (!rtc_data) return 0; +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) + sysfs_remove_bin_file(&pdev->dev.kobj, rtc_data->persist); + kfree(rtc_data->persist); +#endif + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, rtc_data->io + STMP3XXX_RTC_CTRL_CLR); free_irq(rtc_data->irq_alarm, &pdev->dev); @@ -384,8 +430,31 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev) } stmp3xxx_wdt_register(pdev); + +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) + rtc_data->persist = kzalloc(sizeof(struct bin_attribute), GFP_KERNEL); + if (!rtc_data->persist) { + err = -ENOMEM; + goto out_persist; + } + + rtc_data->persist->attr.name = "persistent"; + rtc_data->persist->attr.mode = S_IRUGO | S_IWUSR; + sysfs_bin_attr_init(rtc_data->persist); + rtc_data->persist->read = stmp3xxx_rtc_persist_read; + rtc_data->persist->write = stmp3xxx_rtc_persist_write; + rtc_data->persist->size = STMP3XXX_RTC_PERSISTENT_LEN; + err = sysfs_create_bin_file(&rtc_data->rtc->dev.kobj, + rtc_data->persist); + if (err) { + kfree(rtc_data->persist); + goto out_persist; + } +#endif + return 0; +out_persist: out_irq_alarm: rtc_device_unregister(rtc_data->rtc); out_remap: -- 1.7.10.4
WARNING: multiple messages have this Message-ID (diff)
From: s.trumtrar@pengutronix.de (Steffen Trumtrar) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 6/9] rtc: stmp3xxx: add sysfs entries for persistent regs Date: Mon, 4 Mar 2013 15:05:45 +0100 [thread overview] Message-ID: <1362405948-12992-7-git-send-email-s.trumtrar@pengutronix.de> (raw) In-Reply-To: <1362405948-12992-1-git-send-email-s.trumtrar@pengutronix.de> The persistent registers 1-5 are completely software defined. To have access from userspace, export them via sysfs. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> --- drivers/rtc/rtc-stmp3xxx.c | 69 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c index 936b0ca..16b45c8 100644 --- a/drivers/rtc/rtc-stmp3xxx.c +++ b/drivers/rtc/rtc-stmp3xxx.c @@ -67,6 +67,8 @@ /* missing bitmask in headers */ #define STMP3XXX_RTC_PERSISTENT1_FORCE_UPDATER 0x80000000 +#define STMP3XXX_RTC_PERSISTENT_LEN (0xC0 - STMP3XXX_RTC_PERSISTENT1) + enum clock_source { MXS_UNKNOWN, MXS_OSC_24M, MXS_OSC_32K, MXS_OSC_32K768 }; struct stmp3xxx_rtc_data { @@ -74,6 +76,9 @@ struct stmp3xxx_rtc_data { void __iomem *io; int irq_alarm; enum clock_source clk_src; +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) + struct bin_attribute *persist; +#endif }; #if IS_ENABLED(CONFIG_STMP3XXX_RTC_WATCHDOG) @@ -262,6 +267,42 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) return 0; } +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) +static ssize_t stmp3xxx_rtc_persist_read(struct file *filep, + struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t size) +{ + struct rtc_device *rtc = container_of(kobj, struct rtc_device, + dev.kobj); + struct device *dev = rtc->dev.parent; + struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); + ssize_t count; + + for (count = 0; size; size--, off++, count++) + *buf++ = readl(rtc_data->io + STMP3XXX_RTC_PERSISTENT1 + off); + + return count; +} + +static ssize_t stmp3xxx_rtc_persist_write(struct file *filep, + struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t size) +{ + struct rtc_device *rtc = container_of(kobj, struct rtc_device, + dev.kobj); + struct device *dev = rtc->dev.parent; + struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev); + ssize_t count; + + for (count = 0; size; size--, off++, count++) + writel(*buf++, rtc_data->io + STMP3XXX_RTC_PERSISTENT1 + off); + + return count; +} +#endif + static struct rtc_class_ops stmp3xxx_rtc_ops = { .alarm_irq_enable = stmp3xxx_alarm_irq_enable, @@ -278,6 +319,11 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev) if (!rtc_data) return 0; +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) + sysfs_remove_bin_file(&pdev->dev.kobj, rtc_data->persist); + kfree(rtc_data->persist); +#endif + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, rtc_data->io + STMP3XXX_RTC_CTRL_CLR); free_irq(rtc_data->irq_alarm, &pdev->dev); @@ -384,8 +430,31 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev) } stmp3xxx_wdt_register(pdev); + +#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) + rtc_data->persist = kzalloc(sizeof(struct bin_attribute), GFP_KERNEL); + if (!rtc_data->persist) { + err = -ENOMEM; + goto out_persist; + } + + rtc_data->persist->attr.name = "persistent"; + rtc_data->persist->attr.mode = S_IRUGO | S_IWUSR; + sysfs_bin_attr_init(rtc_data->persist); + rtc_data->persist->read = stmp3xxx_rtc_persist_read; + rtc_data->persist->write = stmp3xxx_rtc_persist_write; + rtc_data->persist->size = STMP3XXX_RTC_PERSISTENT_LEN; + err = sysfs_create_bin_file(&rtc_data->rtc->dev.kobj, + rtc_data->persist); + if (err) { + kfree(rtc_data->persist); + goto out_persist; + } +#endif + return 0; +out_persist: out_irq_alarm: rtc_device_unregister(rtc_data->rtc); out_remap: -- 1.7.10.4
next prev parent reply other threads:[~2013-03-04 14:05 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-03-04 14:05 [PATCH 0/9] rtc: stmp3xxx: DT bindings and wakealarm Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-1-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-04 14:05 ` [PATCH 1/9] MXS/i.MX28: add the possibility to define the used crystals via device tree Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-2-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:17 ` Shawn Guo 2013-03-07 6:17 ` Shawn Guo 2013-03-04 14:05 ` [PATCH 2/9] MXS/i.MX28: add the possibility to define the external RTC crystal Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-3-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:33 ` Shawn Guo 2013-03-07 6:33 ` Shawn Guo 2013-03-04 14:05 ` [PATCH 3/9] MXS/i.MX28: prepare different clocking of the built-in RTC Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-4-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:40 ` Shawn Guo 2013-03-07 6:40 ` Shawn Guo 2013-03-04 14:05 ` [PATCH 4/9] MXS/i.MX28: there is more than one way to clock the RTC Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-5-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:48 ` Shawn Guo 2013-03-07 6:48 ` Shawn Guo [not found] ` <20130307064824.GD5372-rvtDTF3kK1ictlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org> 2013-03-07 8:19 ` Steffen Trumtrar 2013-03-07 8:19 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 5/9] MXS/i.MX28: enable RTC to wakeup the system Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [this message] 2013-03-04 14:05 ` [PATCH 6/9] rtc: stmp3xxx: add sysfs entries for persistent regs Steffen Trumtrar [not found] ` <1362405948-12992-7-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-04 15:14 ` Grant Likely 2013-03-04 15:14 ` Grant Likely [not found] ` <CACxGe6swW-UDH1cUw1D8P+gyhDC8nDZur-A_m_NBfeRUxcg9Jw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-03-05 8:02 ` Steffen Trumtrar 2013-03-05 8:02 ` Steffen Trumtrar [not found] ` <20130305080252.GA7042-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-06 13:27 ` Steffen Trumtrar 2013-03-06 13:27 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 7/9] rtc: stmp3xxx: Re-enable active alarm Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 8/9] rtc: stmp3xxx: Check copy controller state Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 9/9] rtc: stmp3xxx: Replace wait_time function Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar
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