From patchwork Wed Jan 20 15:41:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 1429335 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-rtc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=mGeTJZfK; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DLXJz0B2Rz9sVR for ; Thu, 21 Jan 2021 04:17:39 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732467AbhATPqh (ORCPT ); Wed, 20 Jan 2021 10:46:37 -0500 Received: from mail.kernel.org ([198.145.29.99]:57672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733027AbhATPms (ORCPT ); Wed, 20 Jan 2021 10:42:48 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id AB2FB2336D; Wed, 20 Jan 2021 15:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611157328; bh=mLZRggFw26oduqsoBKrgHCf4iDFskViFHto32MVzJx8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mGeTJZfKY9MckoaZvY3DGf/oPlAYeyaMdosuLre3NQeqMOv7iFYpWtQZuWZeZhf7m uO5tVZ9yvl4SbywDsidxKr835oO8pxbWGId84PkIrOzzWYRnWBc0PblJmKmXtTQb0v sbar+VVTitpz5BzFCCW8pThf5K+EnGzvYvR5H3bLn/rvaru45/RAfsnJVXOkqeyoGR yQCW05lKD8KurLWQK6q9bYIr2Y3rKBhnATgiqN08HiSw1DJKHaSG4dJfr4q/9+d99e ph1Int/YVoNosmY7EohdY3rR4KyDOFvRV4bZrCQJ033NV6YxGXTBcFb/uXnuAl6t8q /L02D6OnwjQLw== From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org, Alexandre Belloni Cc: Alessandro Zummo , Arnd Bergmann , Barry Song Subject: [PATCH 1/3] rtc: remove sirfsoc driver Date: Wed, 20 Jan 2021 16:41:56 +0100 Message-Id: <20210120154158.1860736-2-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210120154158.1860736-1-arnd@kernel.org> References: <20210120154158.1860736-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org From: Arnd Bergmann The CSR SiRF prima2/atlas platforms are getting removed, so this driver is no longer needed. Cc: Barry Song Signed-off-by: Arnd Bergmann Acked-by: Barry Song --- .../bindings/rtc/sirf,prima2-sysrtc.txt | 13 - drivers/rtc/Kconfig | 7 - drivers/rtc/Makefile | 1 - drivers/rtc/rtc-sirfsoc.c | 446 ------------------ include/linux/rtc/sirfsoc_rtciobrg.h | 21 - 5 files changed, 488 deletions(-) delete mode 100644 Documentation/devicetree/bindings/rtc/sirf,prima2-sysrtc.txt delete mode 100644 drivers/rtc/rtc-sirfsoc.c delete mode 100644 include/linux/rtc/sirfsoc_rtciobrg.h diff --git a/Documentation/devicetree/bindings/rtc/sirf,prima2-sysrtc.txt b/Documentation/devicetree/bindings/rtc/sirf,prima2-sysrtc.txt deleted file mode 100644 index 58885b55da21..000000000000 --- a/Documentation/devicetree/bindings/rtc/sirf,prima2-sysrtc.txt +++ /dev/null @@ -1,13 +0,0 @@ -SiRFSoC Real Time Clock - -Required properties: -- compatible: must be "sirf,prima2-sysrtc" -- reg: address range of rtc register set. -- interrupts: rtc alarm interrupts. - -Example: - rtc@2000 { - compatible = "sirf,prima2-sysrtc"; - reg = <0x2000 0x1000>; - interrupts = <52 53 54>; - }; diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 6123f9f4fbc9..8fb9aa55ace1 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1799,13 +1799,6 @@ config RTC_DRV_IMX_SC If you say yes here you get support for the NXP i.MX System Controller RTC module. -config RTC_DRV_SIRFSOC - tristate "SiRFSOC RTC" - depends on ARCH_SIRF - help - Say "yes" here to support the real time clock on SiRF SOC chips. - This driver can also be built as a module called rtc-sirfsoc. - config RTC_DRV_ST_LPC tristate "STMicroelectronics LPC RTC" depends on ARCH_STI diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index bb8f319b09fb..1f00896db507 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -154,7 +154,6 @@ obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o obj-$(CONFIG_RTC_DRV_SC27XX) += rtc-sc27xx.o obj-$(CONFIG_RTC_DRV_SD3078) += rtc-sd3078.o obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o -obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o obj-$(CONFIG_RTC_DRV_SNVS) += rtc-snvs.o obj-$(CONFIG_RTC_DRV_SPEAR) += rtc-spear.o obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c deleted file mode 100644 index 03a6cca23201..000000000000 --- a/drivers/rtc/rtc-sirfsoc.c +++ /dev/null @@ -1,446 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * SiRFSoC Real Time Clock interface for Linux - * - * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - - -#define RTC_CN 0x00 -#define RTC_ALARM0 0x04 -#define RTC_ALARM1 0x18 -#define RTC_STATUS 0x08 -#define RTC_SW_VALUE 0x40 -#define SIRFSOC_RTC_AL1E (1<<6) -#define SIRFSOC_RTC_AL1 (1<<4) -#define SIRFSOC_RTC_HZE (1<<3) -#define SIRFSOC_RTC_AL0E (1<<2) -#define SIRFSOC_RTC_HZ (1<<1) -#define SIRFSOC_RTC_AL0 (1<<0) -#define RTC_DIV 0x0c -#define RTC_DEEP_CTRL 0x14 -#define RTC_CLOCK_SWITCH 0x1c -#define SIRFSOC_RTC_CLK 0x03 /* others are reserved */ - -/* Refer to RTC DIV switch */ -#define RTC_HZ 16 - -/* This macro is also defined in arch/arm/plat-sirfsoc/cpu.c */ -#define RTC_SHIFT 4 - -#define INTR_SYSRTC_CN 0x48 - -struct sirfsoc_rtc_drv { - struct rtc_device *rtc; - u32 rtc_base; - u32 irq; - unsigned irq_wake; - /* Overflow for every 8 years extra time */ - u32 overflow_rtc; - spinlock_t lock; - struct regmap *regmap; -#ifdef CONFIG_PM - u32 saved_counter; - u32 saved_overflow_rtc; -#endif -}; - -static u32 sirfsoc_rtc_readl(struct sirfsoc_rtc_drv *rtcdrv, u32 offset) -{ - u32 val; - - regmap_read(rtcdrv->regmap, rtcdrv->rtc_base + offset, &val); - return val; -} - -static void sirfsoc_rtc_writel(struct sirfsoc_rtc_drv *rtcdrv, - u32 offset, u32 val) -{ - regmap_write(rtcdrv->regmap, rtcdrv->rtc_base + offset, val); -} - -static int sirfsoc_rtc_read_alarm(struct device *dev, - struct rtc_wkalrm *alrm) -{ - unsigned long rtc_alarm, rtc_count; - struct sirfsoc_rtc_drv *rtcdrv; - - rtcdrv = dev_get_drvdata(dev); - - spin_lock_irq(&rtcdrv->lock); - - rtc_count = sirfsoc_rtc_readl(rtcdrv, RTC_CN); - - rtc_alarm = sirfsoc_rtc_readl(rtcdrv, RTC_ALARM0); - memset(alrm, 0, sizeof(struct rtc_wkalrm)); - - /* - * assume alarm interval not beyond one round counter overflow_rtc: - * 0->0xffffffff - */ - /* if alarm is in next overflow cycle */ - if (rtc_count > rtc_alarm) - rtc_time64_to_tm((rtcdrv->overflow_rtc + 1) - << (BITS_PER_LONG - RTC_SHIFT) - | rtc_alarm >> RTC_SHIFT, &alrm->time); - else - rtc_time64_to_tm(rtcdrv->overflow_rtc - << (BITS_PER_LONG - RTC_SHIFT) - | rtc_alarm >> RTC_SHIFT, &alrm->time); - if (sirfsoc_rtc_readl(rtcdrv, RTC_STATUS) & SIRFSOC_RTC_AL0E) - alrm->enabled = 1; - - spin_unlock_irq(&rtcdrv->lock); - - return 0; -} - -static int sirfsoc_rtc_set_alarm(struct device *dev, - struct rtc_wkalrm *alrm) -{ - unsigned long rtc_status_reg, rtc_alarm; - struct sirfsoc_rtc_drv *rtcdrv; - rtcdrv = dev_get_drvdata(dev); - - if (alrm->enabled) { - rtc_alarm = rtc_tm_to_time64(&alrm->time); - - spin_lock_irq(&rtcdrv->lock); - - rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); - if (rtc_status_reg & SIRFSOC_RTC_AL0E) { - /* - * An ongoing alarm in progress - ingore it and not - * to return EBUSY - */ - dev_info(dev, "An old alarm was set, will be replaced by a new one\n"); - } - - sirfsoc_rtc_writel(rtcdrv, RTC_ALARM0, rtc_alarm << RTC_SHIFT); - rtc_status_reg &= ~0x07; /* mask out the lower status bits */ - /* - * This bit RTC_AL sets it as a wake-up source for Sleep Mode - * Writing 1 into this bit will clear it - */ - rtc_status_reg |= SIRFSOC_RTC_AL0; - /* enable the RTC alarm interrupt */ - rtc_status_reg |= SIRFSOC_RTC_AL0E; - sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, rtc_status_reg); - - spin_unlock_irq(&rtcdrv->lock); - } else { - /* - * if this function was called with enabled=0 - * then it could mean that the application is - * trying to cancel an ongoing alarm - */ - spin_lock_irq(&rtcdrv->lock); - - rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); - if (rtc_status_reg & SIRFSOC_RTC_AL0E) { - /* clear the RTC status register's alarm bit */ - rtc_status_reg &= ~0x07; - /* write 1 into SIRFSOC_RTC_AL0 to force a clear */ - rtc_status_reg |= (SIRFSOC_RTC_AL0); - /* Clear the Alarm enable bit */ - rtc_status_reg &= ~(SIRFSOC_RTC_AL0E); - - sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, - rtc_status_reg); - } - - spin_unlock_irq(&rtcdrv->lock); - } - - return 0; -} - -static int sirfsoc_rtc_read_time(struct device *dev, - struct rtc_time *tm) -{ - unsigned long tmp_rtc = 0; - struct sirfsoc_rtc_drv *rtcdrv; - rtcdrv = dev_get_drvdata(dev); - /* - * This patch is taken from WinCE - Need to validate this for - * correctness. To work around sirfsoc RTC counter double sync logic - * fail, read several times to make sure get stable value. - */ - do { - tmp_rtc = sirfsoc_rtc_readl(rtcdrv, RTC_CN); - cpu_relax(); - } while (tmp_rtc != sirfsoc_rtc_readl(rtcdrv, RTC_CN)); - - rtc_time64_to_tm(rtcdrv->overflow_rtc << (BITS_PER_LONG - RTC_SHIFT) - | tmp_rtc >> RTC_SHIFT, tm); - return 0; -} - -static int sirfsoc_rtc_set_time(struct device *dev, - struct rtc_time *tm) -{ - unsigned long rtc_time; - struct sirfsoc_rtc_drv *rtcdrv; - rtcdrv = dev_get_drvdata(dev); - - rtc_time = rtc_tm_to_time64(tm); - - rtcdrv->overflow_rtc = rtc_time >> (BITS_PER_LONG - RTC_SHIFT); - - sirfsoc_rtc_writel(rtcdrv, RTC_SW_VALUE, rtcdrv->overflow_rtc); - sirfsoc_rtc_writel(rtcdrv, RTC_CN, rtc_time << RTC_SHIFT); - - return 0; -} - -static int sirfsoc_rtc_alarm_irq_enable(struct device *dev, - unsigned int enabled) -{ - unsigned long rtc_status_reg = 0x0; - struct sirfsoc_rtc_drv *rtcdrv; - - rtcdrv = dev_get_drvdata(dev); - - spin_lock_irq(&rtcdrv->lock); - - rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); - if (enabled) - rtc_status_reg |= SIRFSOC_RTC_AL0E; - else - rtc_status_reg &= ~SIRFSOC_RTC_AL0E; - - sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, rtc_status_reg); - - spin_unlock_irq(&rtcdrv->lock); - - return 0; - -} - -static const struct rtc_class_ops sirfsoc_rtc_ops = { - .read_time = sirfsoc_rtc_read_time, - .set_time = sirfsoc_rtc_set_time, - .read_alarm = sirfsoc_rtc_read_alarm, - .set_alarm = sirfsoc_rtc_set_alarm, - .alarm_irq_enable = sirfsoc_rtc_alarm_irq_enable -}; - -static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata) -{ - struct sirfsoc_rtc_drv *rtcdrv = pdata; - unsigned long rtc_status_reg = 0x0; - unsigned long events = 0x0; - - spin_lock(&rtcdrv->lock); - - rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); - /* this bit will be set ONLY if an alarm was active - * and it expired NOW - * So this is being used as an ASSERT - */ - if (rtc_status_reg & SIRFSOC_RTC_AL0) { - /* - * clear the RTC status register's alarm bit - * mask out the lower status bits - */ - rtc_status_reg &= ~0x07; - /* write 1 into SIRFSOC_RTC_AL0 to ACK the alarm interrupt */ - rtc_status_reg |= (SIRFSOC_RTC_AL0); - /* Clear the Alarm enable bit */ - rtc_status_reg &= ~(SIRFSOC_RTC_AL0E); - } - - sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, rtc_status_reg); - - spin_unlock(&rtcdrv->lock); - - /* this should wake up any apps polling/waiting on the read - * after setting the alarm - */ - events |= RTC_IRQF | RTC_AF; - rtc_update_irq(rtcdrv->rtc, 1, events); - - return IRQ_HANDLED; -} - -static const struct of_device_id sirfsoc_rtc_of_match[] = { - { .compatible = "sirf,prima2-sysrtc"}, - {}, -}; - -static const struct regmap_config sysrtc_regmap_config = { - .reg_bits = 32, - .val_bits = 32, - .fast_io = true, -}; - -MODULE_DEVICE_TABLE(of, sirfsoc_rtc_of_match); - -static int sirfsoc_rtc_probe(struct platform_device *pdev) -{ - int err; - unsigned long rtc_div; - struct sirfsoc_rtc_drv *rtcdrv; - struct device_node *np = pdev->dev.of_node; - - rtcdrv = devm_kzalloc(&pdev->dev, - sizeof(struct sirfsoc_rtc_drv), GFP_KERNEL); - if (rtcdrv == NULL) - return -ENOMEM; - - spin_lock_init(&rtcdrv->lock); - - err = of_property_read_u32(np, "reg", &rtcdrv->rtc_base); - if (err) { - dev_err(&pdev->dev, "unable to find base address of rtc node in dtb\n"); - return err; - } - - platform_set_drvdata(pdev, rtcdrv); - - /* Register rtc alarm as a wakeup source */ - device_init_wakeup(&pdev->dev, 1); - - rtcdrv->regmap = devm_regmap_init_iobg(&pdev->dev, - &sysrtc_regmap_config); - if (IS_ERR(rtcdrv->regmap)) { - err = PTR_ERR(rtcdrv->regmap); - dev_err(&pdev->dev, "Failed to allocate register map: %d\n", - err); - return err; - } - - /* - * Set SYS_RTC counter in RTC_HZ HZ Units - * We are using 32K RTC crystal (32768 / RTC_HZ / 2) -1 - * If 16HZ, therefore RTC_DIV = 1023; - */ - rtc_div = ((32768 / RTC_HZ) / 2) - 1; - sirfsoc_rtc_writel(rtcdrv, RTC_DIV, rtc_div); - - /* 0x3 -> RTC_CLK */ - sirfsoc_rtc_writel(rtcdrv, RTC_CLOCK_SWITCH, SIRFSOC_RTC_CLK); - - /* reset SYS RTC ALARM0 */ - sirfsoc_rtc_writel(rtcdrv, RTC_ALARM0, 0x0); - - /* reset SYS RTC ALARM1 */ - sirfsoc_rtc_writel(rtcdrv, RTC_ALARM1, 0x0); - - /* Restore RTC Overflow From Register After Command Reboot */ - rtcdrv->overflow_rtc = - sirfsoc_rtc_readl(rtcdrv, RTC_SW_VALUE); - - rtcdrv->rtc = devm_rtc_allocate_device(&pdev->dev); - if (IS_ERR(rtcdrv->rtc)) - return PTR_ERR(rtcdrv->rtc); - - rtcdrv->rtc->ops = &sirfsoc_rtc_ops; - rtcdrv->rtc->range_max = (1ULL << 60) - 1; - - rtcdrv->irq = platform_get_irq(pdev, 0); - err = devm_request_irq(&pdev->dev, rtcdrv->irq, sirfsoc_rtc_irq_handler, - IRQF_SHARED, pdev->name, rtcdrv); - if (err) { - dev_err(&pdev->dev, "Unable to register for the SiRF SOC RTC IRQ\n"); - return err; - } - - return devm_rtc_register_device(rtcdrv->rtc); -} - -#ifdef CONFIG_PM_SLEEP -static int sirfsoc_rtc_suspend(struct device *dev) -{ - struct sirfsoc_rtc_drv *rtcdrv = dev_get_drvdata(dev); - rtcdrv->overflow_rtc = - sirfsoc_rtc_readl(rtcdrv, RTC_SW_VALUE); - - rtcdrv->saved_counter = - sirfsoc_rtc_readl(rtcdrv, RTC_CN); - rtcdrv->saved_overflow_rtc = rtcdrv->overflow_rtc; - if (device_may_wakeup(dev) && !enable_irq_wake(rtcdrv->irq)) - rtcdrv->irq_wake = 1; - - return 0; -} - -static int sirfsoc_rtc_resume(struct device *dev) -{ - u32 tmp; - struct sirfsoc_rtc_drv *rtcdrv = dev_get_drvdata(dev); - - /* - * if resume from snapshot and the rtc power is lost, - * restroe the rtc settings - */ - if (SIRFSOC_RTC_CLK != sirfsoc_rtc_readl(rtcdrv, RTC_CLOCK_SWITCH)) { - u32 rtc_div; - /* 0x3 -> RTC_CLK */ - sirfsoc_rtc_writel(rtcdrv, RTC_CLOCK_SWITCH, SIRFSOC_RTC_CLK); - /* - * Set SYS_RTC counter in RTC_HZ HZ Units - * We are using 32K RTC crystal (32768 / RTC_HZ / 2) -1 - * If 16HZ, therefore RTC_DIV = 1023; - */ - rtc_div = ((32768 / RTC_HZ) / 2) - 1; - - sirfsoc_rtc_writel(rtcdrv, RTC_DIV, rtc_div); - - /* reset SYS RTC ALARM0 */ - sirfsoc_rtc_writel(rtcdrv, RTC_ALARM0, 0x0); - - /* reset SYS RTC ALARM1 */ - sirfsoc_rtc_writel(rtcdrv, RTC_ALARM1, 0x0); - } - rtcdrv->overflow_rtc = rtcdrv->saved_overflow_rtc; - - /* - * if current counter is small than previous, - * it means overflow in sleep - */ - tmp = sirfsoc_rtc_readl(rtcdrv, RTC_CN); - if (tmp <= rtcdrv->saved_counter) - rtcdrv->overflow_rtc++; - /* - *PWRC Value Be Changed When Suspend, Restore Overflow - * In Memory To Register - */ - sirfsoc_rtc_writel(rtcdrv, RTC_SW_VALUE, rtcdrv->overflow_rtc); - - if (device_may_wakeup(dev) && rtcdrv->irq_wake) { - disable_irq_wake(rtcdrv->irq); - rtcdrv->irq_wake = 0; - } - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(sirfsoc_rtc_pm_ops, - sirfsoc_rtc_suspend, sirfsoc_rtc_resume); - -static struct platform_driver sirfsoc_rtc_driver = { - .driver = { - .name = "sirfsoc-rtc", - .pm = &sirfsoc_rtc_pm_ops, - .of_match_table = sirfsoc_rtc_of_match, - }, - .probe = sirfsoc_rtc_probe, -}; -module_platform_driver(sirfsoc_rtc_driver); - -MODULE_DESCRIPTION("SiRF SoC rtc driver"); -MODULE_AUTHOR("Xianglong Du "); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:sirfsoc-rtc"); diff --git a/include/linux/rtc/sirfsoc_rtciobrg.h b/include/linux/rtc/sirfsoc_rtciobrg.h deleted file mode 100644 index b31f2856733d..000000000000 --- a/include/linux/rtc/sirfsoc_rtciobrg.h +++ /dev/null @@ -1,21 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* - * RTC I/O Bridge interfaces for CSR SiRFprimaII - * ARM access the registers of SYSRTC, GPSRTC and PWRC through this module - * - * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. - */ -#ifndef _SIRFSOC_RTC_IOBRG_H_ -#define _SIRFSOC_RTC_IOBRG_H_ - -struct regmap_config; - -extern void sirfsoc_rtc_iobrg_besyncing(void); - -extern u32 sirfsoc_rtc_iobrg_readl(u32 addr); - -extern void sirfsoc_rtc_iobrg_writel(u32 val, u32 addr); -struct regmap *devm_regmap_init_iobg(struct device *dev, - const struct regmap_config *config); - -#endif From patchwork Wed Jan 20 15:41:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 1429295 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-rtc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=FqWNkBFb; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DLVJM3GmCz9sSs for ; Thu, 21 Jan 2021 02:46:59 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728981AbhATPqd (ORCPT ); Wed, 20 Jan 2021 10:46:33 -0500 Received: from mail.kernel.org ([198.145.29.99]:57696 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733042AbhATPmv (ORCPT ); Wed, 20 Jan 2021 10:42:51 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 80FC823382; Wed, 20 Jan 2021 15:42:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611157329; bh=T9xyOgUhu1xz0Ggrk+3PTqE768OmzsjXmHEzzGIrhpw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FqWNkBFb06L2Dz3SSmCpMpLQNh4DJvDxiCp0gAC7Q2D1nMpNgd/7jgsjY+8tIqny/ mI1JPrlwzzQOqmlt0/RkrIGWlU2pSneDjmmNCPTzhc3UDmXnA13tPMwtmQOwi5dESa /FFZ72hqAAdrq9t+slnz/JjwZvwVeD6JrHgPjSIIvjrORVXQ+NCisNY/k3ZZI32wy4 rchFksPfS3R+CrSIpxX2ug1AgCb45LduSWZN4cUXXi3dTcKB+W4K/Z1YU9z9rF5j9p SfFB4rkjDjun//8xFikfDRDs9Y8mPJ0Edvw70wA+yvrj0j7BqYTFGsD4CS/ULL8sEq 7he6wt4bujPuA== From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org, Alexandre Belloni Cc: Alessandro Zummo , Arnd Bergmann , Linus Walleij Subject: [PATCH 2/3] rtc: remove ste coh901 driver Date: Wed, 20 Jan 2021 16:41:57 +0100 Message-Id: <20210120154158.1860736-3-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210120154158.1860736-1-arnd@kernel.org> References: <20210120154158.1860736-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org From: Arnd Bergmann The ST-Ericsson U300 platform is getting removed, so this driver is no longer needed. Cc: Linus Walleij Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij --- .../bindings/rtc/stericsson,coh901331.txt | 16 - drivers/rtc/Kconfig | 12 - drivers/rtc/Makefile | 1 - drivers/rtc/rtc-coh901331.c | 290 ------------------ 4 files changed, 319 deletions(-) delete mode 100644 Documentation/devicetree/bindings/rtc/stericsson,coh901331.txt delete mode 100644 drivers/rtc/rtc-coh901331.c diff --git a/Documentation/devicetree/bindings/rtc/stericsson,coh901331.txt b/Documentation/devicetree/bindings/rtc/stericsson,coh901331.txt deleted file mode 100644 index e615a897b20e..000000000000 --- a/Documentation/devicetree/bindings/rtc/stericsson,coh901331.txt +++ /dev/null @@ -1,16 +0,0 @@ -ST-Ericsson COH 901 331 Real Time Clock - -Required properties: -- compatible: must be "stericsson,coh901331" -- reg: address range of rtc register set. -- interrupts: rtc alarm interrupt. -- clocks: phandle to the rtc clock source - -Example: - rtc: rtc@c0017000 { - compatible = "stericsson,coh901331"; - reg = <0xc0017000 0x1000>; - interrupt-parent = <&vicb>; - interrupts = <10>; - clocks = <&rtc_clk>; - }; diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 8fb9aa55ace1..ff583d6a2870 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1645,18 +1645,6 @@ config RTC_DRV_PS3 This driver can also be built as a module. If so, the module will be called rtc-ps3. -config RTC_DRV_COH901331 - tristate "ST-Ericsson COH 901 331 RTC" - depends on ARCH_U300 || COMPILE_TEST - help - If you say Y here you will get access to ST-Ericsson - COH 901 331 RTC clock found in some ST-Ericsson Mobile - Platforms. - - This driver can also be built as a module. If so, the module - will be called "rtc-coh901331". - - config RTC_DRV_STMP tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC" depends on ARCH_MXS || COMPILE_TEST diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 1f00896db507..8585cd159979 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -38,7 +38,6 @@ obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o obj-$(CONFIG_RTC_DRV_BRCMSTB) += rtc-brcmstb-waketimer.o obj-$(CONFIG_RTC_DRV_CADENCE) += rtc-cadence.o obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o -obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o obj-$(CONFIG_RTC_DRV_CPCAP) += rtc-cpcap.o obj-$(CONFIG_RTC_DRV_CROS_EC) += rtc-cros-ec.o obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c deleted file mode 100644 index 168ced87d93a..000000000000 --- a/drivers/rtc/rtc-coh901331.c +++ /dev/null @@ -1,290 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2007-2009 ST-Ericsson AB - * Real Time Clock interface for ST-Ericsson AB COH 901 331 RTC. - * Author: Linus Walleij - * Based on rtc-pl031.c by Deepak Saxena - * Copyright 2006 (c) MontaVista Software, Inc. - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* - * Registers in the COH 901 331 - */ -/* Alarm value 32bit (R/W) */ -#define COH901331_ALARM 0x00U -/* Used to set current time 32bit (R/W) */ -#define COH901331_SET_TIME 0x04U -/* Indication if current time is valid 32bit (R/-) */ -#define COH901331_VALID 0x08U -/* Read the current time 32bit (R/-) */ -#define COH901331_CUR_TIME 0x0cU -/* Event register for the "alarm" interrupt */ -#define COH901331_IRQ_EVENT 0x10U -/* Mask register for the "alarm" interrupt */ -#define COH901331_IRQ_MASK 0x14U -/* Force register for the "alarm" interrupt */ -#define COH901331_IRQ_FORCE 0x18U - -/* - * Reference to RTC block clock - * Notice that the frequent clk_enable()/clk_disable() on this - * clock is mainly to be able to turn on/off other clocks in the - * hierarchy as needed, the RTC clock is always on anyway. - */ -struct coh901331_port { - struct rtc_device *rtc; - struct clk *clk; - void __iomem *virtbase; - int irq; -#ifdef CONFIG_PM_SLEEP - u32 irqmaskstore; -#endif -}; - -static irqreturn_t coh901331_interrupt(int irq, void *data) -{ - struct coh901331_port *rtap = data; - - clk_enable(rtap->clk); - /* Ack IRQ */ - writel(1, rtap->virtbase + COH901331_IRQ_EVENT); - /* - * Disable the interrupt. This is necessary because - * the RTC lives on a lower-clocked line and will - * not release the IRQ line until after a few (slower) - * clock cycles. The interrupt will be re-enabled when - * a new alarm is set anyway. - */ - writel(0, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable(rtap->clk); - - /* Set alarm flag */ - rtc_update_irq(rtap->rtc, 1, RTC_AF); - - return IRQ_HANDLED; -} - -static int coh901331_read_time(struct device *dev, struct rtc_time *tm) -{ - struct coh901331_port *rtap = dev_get_drvdata(dev); - - clk_enable(rtap->clk); - /* Check if the time is valid */ - if (!readl(rtap->virtbase + COH901331_VALID)) { - clk_disable(rtap->clk); - return -EINVAL; - } - - rtc_time64_to_tm(readl(rtap->virtbase + COH901331_CUR_TIME), tm); - clk_disable(rtap->clk); - return 0; -} - -static int coh901331_set_time(struct device *dev, struct rtc_time *tm) -{ - struct coh901331_port *rtap = dev_get_drvdata(dev); - - clk_enable(rtap->clk); - writel(rtc_tm_to_time64(tm), rtap->virtbase + COH901331_SET_TIME); - clk_disable(rtap->clk); - - return 0; -} - -static int coh901331_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) -{ - struct coh901331_port *rtap = dev_get_drvdata(dev); - - clk_enable(rtap->clk); - rtc_time64_to_tm(readl(rtap->virtbase + COH901331_ALARM), &alarm->time); - alarm->pending = readl(rtap->virtbase + COH901331_IRQ_EVENT) & 1U; - alarm->enabled = readl(rtap->virtbase + COH901331_IRQ_MASK) & 1U; - clk_disable(rtap->clk); - - return 0; -} - -static int coh901331_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) -{ - struct coh901331_port *rtap = dev_get_drvdata(dev); - unsigned long time = rtc_tm_to_time64(&alarm->time); - - clk_enable(rtap->clk); - writel(time, rtap->virtbase + COH901331_ALARM); - writel(alarm->enabled, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable(rtap->clk); - - return 0; -} - -static int coh901331_alarm_irq_enable(struct device *dev, unsigned int enabled) -{ - struct coh901331_port *rtap = dev_get_drvdata(dev); - - clk_enable(rtap->clk); - if (enabled) - writel(1, rtap->virtbase + COH901331_IRQ_MASK); - else - writel(0, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable(rtap->clk); - - return 0; -} - -static const struct rtc_class_ops coh901331_ops = { - .read_time = coh901331_read_time, - .set_time = coh901331_set_time, - .read_alarm = coh901331_read_alarm, - .set_alarm = coh901331_set_alarm, - .alarm_irq_enable = coh901331_alarm_irq_enable, -}; - -static int __exit coh901331_remove(struct platform_device *pdev) -{ - struct coh901331_port *rtap = platform_get_drvdata(pdev); - - if (rtap) - clk_unprepare(rtap->clk); - - return 0; -} - - -static int __init coh901331_probe(struct platform_device *pdev) -{ - int ret; - struct coh901331_port *rtap; - - rtap = devm_kzalloc(&pdev->dev, - sizeof(struct coh901331_port), GFP_KERNEL); - if (!rtap) - return -ENOMEM; - - rtap->virtbase = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(rtap->virtbase)) - return PTR_ERR(rtap->virtbase); - - rtap->irq = platform_get_irq(pdev, 0); - if (devm_request_irq(&pdev->dev, rtap->irq, coh901331_interrupt, 0, - "RTC COH 901 331 Alarm", rtap)) - return -EIO; - - rtap->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(rtap->clk)) { - ret = PTR_ERR(rtap->clk); - dev_err(&pdev->dev, "could not get clock\n"); - return ret; - } - - rtap->rtc = devm_rtc_allocate_device(&pdev->dev); - if (IS_ERR(rtap->rtc)) - return PTR_ERR(rtap->rtc); - - rtap->rtc->ops = &coh901331_ops; - rtap->rtc->range_max = U32_MAX; - - /* We enable/disable the clock only to assure it works */ - ret = clk_prepare_enable(rtap->clk); - if (ret) { - dev_err(&pdev->dev, "could not enable clock\n"); - return ret; - } - clk_disable(rtap->clk); - - platform_set_drvdata(pdev, rtap); - - ret = devm_rtc_register_device(rtap->rtc); - if (ret) - goto out_no_rtc; - - return 0; - - out_no_rtc: - clk_unprepare(rtap->clk); - return ret; -} - -#ifdef CONFIG_PM_SLEEP -static int coh901331_suspend(struct device *dev) -{ - struct coh901331_port *rtap = dev_get_drvdata(dev); - - /* - * If this RTC alarm will be used for waking the system up, - * don't disable it of course. Else we just disable the alarm - * and await suspension. - */ - if (device_may_wakeup(dev)) { - enable_irq_wake(rtap->irq); - } else { - clk_enable(rtap->clk); - rtap->irqmaskstore = readl(rtap->virtbase + COH901331_IRQ_MASK); - writel(0, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable(rtap->clk); - } - clk_unprepare(rtap->clk); - return 0; -} - -static int coh901331_resume(struct device *dev) -{ - int ret; - struct coh901331_port *rtap = dev_get_drvdata(dev); - - ret = clk_prepare(rtap->clk); - if (ret) - return ret; - - if (device_may_wakeup(dev)) { - disable_irq_wake(rtap->irq); - } else { - clk_enable(rtap->clk); - writel(rtap->irqmaskstore, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable(rtap->clk); - } - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(coh901331_pm_ops, coh901331_suspend, coh901331_resume); - -static void coh901331_shutdown(struct platform_device *pdev) -{ - struct coh901331_port *rtap = platform_get_drvdata(pdev); - - clk_enable(rtap->clk); - writel(0, rtap->virtbase + COH901331_IRQ_MASK); - clk_disable_unprepare(rtap->clk); -} - -static const struct of_device_id coh901331_dt_match[] = { - { .compatible = "stericsson,coh901331" }, - {}, -}; -MODULE_DEVICE_TABLE(of, coh901331_dt_match); - -static struct platform_driver coh901331_driver = { - .driver = { - .name = "rtc-coh901331", - .pm = &coh901331_pm_ops, - .of_match_table = coh901331_dt_match, - }, - .remove = __exit_p(coh901331_remove), - .shutdown = coh901331_shutdown, -}; - -module_platform_driver_probe(coh901331_driver, coh901331_probe); - -MODULE_AUTHOR("Linus Walleij "); -MODULE_DESCRIPTION("ST-Ericsson AB COH 901 331 RTC Driver"); -MODULE_LICENSE("GPL"); From patchwork Wed Jan 20 15:41:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 1429294 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-rtc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=MIFtIN5s; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DLVGx1mzMz9sSs for ; Thu, 21 Jan 2021 02:45:45 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729111AbhATPpE (ORCPT ); Wed, 20 Jan 2021 10:45:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:57718 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733093AbhATPmw (ORCPT ); Wed, 20 Jan 2021 10:42:52 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5106B23381; Wed, 20 Jan 2021 15:42:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611157331; bh=9S8vgYWiSKG9ifXODcOOQ3l8wTWBhuN2g84JbrEqlp8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MIFtIN5s2WyZ26ER2qx0zrFYKjyqz3CAi1LBTwe1Tb0Yapeai7Ng4tWCMZQ7qGmBl h+u9wYNQckmZWoUEa0sTHdZvbRFhobNMVN2nP99qxYnApGqHsXgxIiYbZPmh+vgLEY KDSNs2JdorgvVaVG+UIp/SjsoJ2Eg+G5vjJCIiYDLVWzw8XHmcYrMh6NJHXfXD43mW Qrrf+eUuDS7mFM0qig1nbjpYJTjXnBmhXS/s7BuM3gCbkh9kENZAVgZumPNMxkfC1k XBSlW2So+41fGvHEmOq2ZI7O0X35XtB7/gWnFFvCAXIBLleZHY6AzEEX5wW0ccEL53 HLrRmsggg742g== From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org, Alexandre Belloni Cc: Alessandro Zummo , Arnd Bergmann , Linus Walleij Subject: [PATCH 3/3] rtc: remove ste ab3100 driver Date: Wed, 20 Jan 2021 16:41:58 +0100 Message-Id: <20210120154158.1860736-4-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210120154158.1860736-1-arnd@kernel.org> References: <20210120154158.1860736-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org From: Arnd Bergmann The ST-Ericsson U300 platform is getting removed, so this driver is no longer needed. Cc: Linus Walleij Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij --- drivers/rtc/Kconfig | 8 -- drivers/rtc/Makefile | 1 - drivers/rtc/rtc-ab3100.c | 254 --------------------------------------- 3 files changed, 263 deletions(-) delete mode 100644 drivers/rtc/rtc-ab3100.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index ff583d6a2870..a608a8ef78fd 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1270,14 +1270,6 @@ config RTC_DRV_PCF50633 If you say yes here you get support for the RTC subsystem of the NXP PCF50633 used in embedded systems. -config RTC_DRV_AB3100 - tristate "ST-Ericsson AB3100 RTC" - depends on AB3100_CORE - default y if AB3100_CORE - help - Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC - support. This chip contains a battery- and capacitor-backed RTC. - config RTC_DRV_AB8500 tristate "ST-Ericsson AB8500 RTC" depends on AB8500_CORE diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 8585cd159979..55f8a2a5b89d 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -19,7 +19,6 @@ rtc-core-$(CONFIG_RTC_INTF_SYSFS) += sysfs.o obj-$(CONFIG_RTC_DRV_88PM80X) += rtc-88pm80x.o obj-$(CONFIG_RTC_DRV_88PM860X) += rtc-88pm860x.o -obj-$(CONFIG_RTC_DRV_AB3100) += rtc-ab3100.o obj-$(CONFIG_RTC_DRV_AB8500) += rtc-ab8500.o obj-$(CONFIG_RTC_DRV_ABB5ZES3) += rtc-ab-b5ze-s3.o obj-$(CONFIG_RTC_DRV_ABEOZ9) += rtc-ab-eoz9.o diff --git a/drivers/rtc/rtc-ab3100.c b/drivers/rtc/rtc-ab3100.c deleted file mode 100644 index e4fd961e8bf6..000000000000 --- a/drivers/rtc/rtc-ab3100.c +++ /dev/null @@ -1,254 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2007-2009 ST-Ericsson AB - * RTC clock driver for the AB3100 Analog Baseband Chip - * Author: Linus Walleij - */ -#include -#include -#include -#include -#include -#include - -/* Clock rate in Hz */ -#define AB3100_RTC_CLOCK_RATE 32768 - -/* - * The AB3100 RTC registers. These are the same for - * AB3000 and AB3100. - * Control register: - * Bit 0: RTC Monitor cleared=0, active=1, if you set it - * to 1 it remains active until RTC power is lost. - * Bit 1: 32 kHz Oscillator, 0 = on, 1 = bypass - * Bit 2: Alarm on, 0 = off, 1 = on - * Bit 3: 32 kHz buffer disabling, 0 = enabled, 1 = disabled - */ -#define AB3100_RTC 0x53 -/* default setting, buffer disabled, alarm on */ -#define RTC_SETTING 0x30 -/* Alarm when AL0-AL3 == TI0-TI3 */ -#define AB3100_AL0 0x56 -#define AB3100_AL1 0x57 -#define AB3100_AL2 0x58 -#define AB3100_AL3 0x59 -/* This 48-bit register that counts up at 32768 Hz */ -#define AB3100_TI0 0x5a -#define AB3100_TI1 0x5b -#define AB3100_TI2 0x5c -#define AB3100_TI3 0x5d -#define AB3100_TI4 0x5e -#define AB3100_TI5 0x5f - -/* - * RTC clock functions and device struct declaration - */ -static int ab3100_rtc_set_time(struct device *dev, struct rtc_time *tm) -{ - u8 regs[] = {AB3100_TI0, AB3100_TI1, AB3100_TI2, - AB3100_TI3, AB3100_TI4, AB3100_TI5}; - unsigned char buf[6]; - u64 hw_counter = rtc_tm_to_time64(tm) * AB3100_RTC_CLOCK_RATE * 2; - int err = 0; - int i; - - buf[0] = (hw_counter) & 0xFF; - buf[1] = (hw_counter >> 8) & 0xFF; - buf[2] = (hw_counter >> 16) & 0xFF; - buf[3] = (hw_counter >> 24) & 0xFF; - buf[4] = (hw_counter >> 32) & 0xFF; - buf[5] = (hw_counter >> 40) & 0xFF; - - for (i = 0; i < 6; i++) { - err = abx500_set_register_interruptible(dev, 0, - regs[i], buf[i]); - if (err) - return err; - } - - /* Set the flag to mark that the clock is now set */ - return abx500_mask_and_set_register_interruptible(dev, 0, - AB3100_RTC, - 0x01, 0x01); - -} - -static int ab3100_rtc_read_time(struct device *dev, struct rtc_time *tm) -{ - time64_t time; - u8 rtcval; - int err; - - err = abx500_get_register_interruptible(dev, 0, - AB3100_RTC, &rtcval); - if (err) - return err; - - if (!(rtcval & 0x01)) { - dev_info(dev, "clock not set (lost power)"); - return -EINVAL; - } else { - u64 hw_counter; - u8 buf[6]; - - /* Read out time registers */ - err = abx500_get_register_page_interruptible(dev, 0, - AB3100_TI0, - buf, 6); - if (err != 0) - return err; - - hw_counter = ((u64) buf[5] << 40) | ((u64) buf[4] << 32) | - ((u64) buf[3] << 24) | ((u64) buf[2] << 16) | - ((u64) buf[1] << 8) | (u64) buf[0]; - time = hw_counter / (u64) (AB3100_RTC_CLOCK_RATE * 2); - } - - rtc_time64_to_tm(time, tm); - - return 0; -} - -static int ab3100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) -{ - time64_t time; - u64 hw_counter; - u8 buf[6]; - u8 rtcval; - int err; - - /* Figure out if alarm is enabled or not */ - err = abx500_get_register_interruptible(dev, 0, - AB3100_RTC, &rtcval); - if (err) - return err; - if (rtcval & 0x04) - alarm->enabled = 1; - else - alarm->enabled = 0; - /* No idea how this could be represented */ - alarm->pending = 0; - /* Read out alarm registers, only 4 bytes */ - err = abx500_get_register_page_interruptible(dev, 0, - AB3100_AL0, buf, 4); - if (err) - return err; - hw_counter = ((u64) buf[3] << 40) | ((u64) buf[2] << 32) | - ((u64) buf[1] << 24) | ((u64) buf[0] << 16); - time = hw_counter / (u64) (AB3100_RTC_CLOCK_RATE * 2); - - rtc_time64_to_tm(time, &alarm->time); - - return rtc_valid_tm(&alarm->time); -} - -static int ab3100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) -{ - u8 regs[] = {AB3100_AL0, AB3100_AL1, AB3100_AL2, AB3100_AL3}; - unsigned char buf[4]; - time64_t secs; - u64 hw_counter; - int err; - int i; - - secs = rtc_tm_to_time64(&alarm->time); - hw_counter = secs * AB3100_RTC_CLOCK_RATE * 2; - buf[0] = (hw_counter >> 16) & 0xFF; - buf[1] = (hw_counter >> 24) & 0xFF; - buf[2] = (hw_counter >> 32) & 0xFF; - buf[3] = (hw_counter >> 40) & 0xFF; - - /* Set the alarm */ - for (i = 0; i < 4; i++) { - err = abx500_set_register_interruptible(dev, 0, - regs[i], buf[i]); - if (err) - return err; - } - /* Then enable the alarm */ - return abx500_mask_and_set_register_interruptible(dev, 0, - AB3100_RTC, (1 << 2), - alarm->enabled << 2); -} - -static int ab3100_rtc_irq_enable(struct device *dev, unsigned int enabled) -{ - /* - * It's not possible to enable/disable the alarm IRQ for this RTC. - * It does not actually trigger any IRQ: instead its only function is - * to power up the system, if it wasn't on. This will manifest as - * a "power up cause" in the AB3100 power driver (battery charging etc) - * and need to be handled there instead. - */ - if (enabled) - return abx500_mask_and_set_register_interruptible(dev, 0, - AB3100_RTC, (1 << 2), - 1 << 2); - else - return abx500_mask_and_set_register_interruptible(dev, 0, - AB3100_RTC, (1 << 2), - 0); -} - -static const struct rtc_class_ops ab3100_rtc_ops = { - .read_time = ab3100_rtc_read_time, - .set_time = ab3100_rtc_set_time, - .read_alarm = ab3100_rtc_read_alarm, - .set_alarm = ab3100_rtc_set_alarm, - .alarm_irq_enable = ab3100_rtc_irq_enable, -}; - -static int __init ab3100_rtc_probe(struct platform_device *pdev) -{ - int err; - u8 regval; - struct rtc_device *rtc; - - /* The first RTC register needs special treatment */ - err = abx500_get_register_interruptible(&pdev->dev, 0, - AB3100_RTC, ®val); - if (err) { - dev_err(&pdev->dev, "unable to read RTC register\n"); - return -ENODEV; - } - - if ((regval & 0xFE) != RTC_SETTING) { - dev_warn(&pdev->dev, "not default value in RTC reg 0x%x\n", - regval); - } - - if ((regval & 1) == 0) { - /* - * Set bit to detect power loss. - * This bit remains until RTC power is lost. - */ - regval = 1 | RTC_SETTING; - err = abx500_set_register_interruptible(&pdev->dev, 0, - AB3100_RTC, regval); - /* Ignore any error on this write */ - } - - rtc = devm_rtc_allocate_device(&pdev->dev); - if (IS_ERR(rtc)) - return PTR_ERR(rtc); - - rtc->ops = &ab3100_rtc_ops; - /* 48bit counter at (AB3100_RTC_CLOCK_RATE * 2) */ - rtc->range_max = U32_MAX; - - platform_set_drvdata(pdev, rtc); - - return devm_rtc_register_device(rtc); -} - -static struct platform_driver ab3100_rtc_driver = { - .driver = { - .name = "ab3100-rtc", - }, -}; - -module_platform_driver_probe(ab3100_rtc_driver, ab3100_rtc_probe); - -MODULE_AUTHOR("Linus Walleij "); -MODULE_DESCRIPTION("AB3100 RTC Driver"); -MODULE_LICENSE("GPL");