From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robin Gong Subject: [PATCH v1] rtc: snvs: add poweroff function Date: Thu, 25 Sep 2014 10:13:53 +0800 Message-ID: <1411611233-29919-1-git-send-email-b38343@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org, grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, shawn.guo-KZfg59tc24xl57MIdRCFDg@public.gmane.org, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, LW-bxm8fMRDkQLDiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On i.mx6 chips, PMIC_ON_REQ can be pulled by snvs LPCR. That can be used poweroff system if PMIC_ON_REQ connected with external PMIC or power control circuit.Power up again if PMIC_ON_REQ pulled high. Signed-off-by: Robin Gong --- Documentation/devicetree/bindings/crypto/fsl-sec4.txt | 4 ++++ drivers/rtc/rtc-snvs.c | 18 ++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/Documentation/devicetree/bindings/crypto/fsl-sec4.txt b/Documentation/devicetree/bindings/crypto/fsl-sec4.txt index e402277..00d67f2 100644 --- a/Documentation/devicetree/bindings/crypto/fsl-sec4.txt +++ b/Documentation/devicetree/bindings/crypto/fsl-sec4.txt @@ -363,11 +363,15 @@ Secure Non-Volatile Storage (SNVS) Low Power (LP) RTC Node Value type: Definition: A standard property. Specifies the physical address and length of the SNVS LP configuration registers. + - fsl,poweroff + Usage: opertional, recommend if PMIC_ON_REQ connected with external + PMIC or power control circuit. EXAMPLE sec_mon_rtc_lp@314000 { compatible = "fsl,sec-v4.0-mon-rtc-lp"; reg = <0x34 0x58>; + fsl,poweroff; }; ===================================================================== diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c index fa384fe..ef32541 100644 --- a/drivers/rtc/rtc-snvs.c +++ b/drivers/rtc/rtc-snvs.c @@ -29,6 +29,8 @@ #define SNVS_LPCR_SRTC_ENV (1 << 0) #define SNVS_LPCR_LPTA_EN (1 << 1) #define SNVS_LPCR_LPWUI_EN (1 << 3) +#define SNVS_LPCR_DP (1 << 5) +#define SNVS_LPCR_TOP (1 << 6) #define SNVS_LPSR_LPTA (1 << 0) #define SNVS_LPPGDR_INIT 0x41736166 @@ -41,6 +43,8 @@ struct snvs_rtc_data { spinlock_t lock; }; +static void __iomem *snvs_base; + static u32 rtc_read_lp_counter(void __iomem *ioaddr) { u64 read1, read2; @@ -241,8 +245,17 @@ static irqreturn_t snvs_rtc_irq_handler(int irq, void *dev_id) return events ? IRQ_HANDLED : IRQ_NONE; } +static void snvs_poweroff(void) +{ + u32 value; + + value = readl(snvs_base + SNVS_LPCR); + writel(value | SNVS_LPCR_DP | SNVS_LPCR_TOP, snvs_base + SNVS_LPCR); +} + static int snvs_rtc_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct snvs_rtc_data *data; struct resource *res; int ret; @@ -260,6 +273,11 @@ static int snvs_rtc_probe(struct platform_device *pdev) if (data->irq < 0) return data->irq; + if (np && of_get_property(np, "fsl,poweroff", NULL)) { + snvs_base = data->ioaddr; + pm_power_off = snvs_poweroff; + } + platform_set_drvdata(pdev, data); spin_lock_init(&data->lock); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html