From patchwork Tue May 28 23:29:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 1106627 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=walle.cc Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=walle.cc header.i=@walle.cc header.b="fuLdqQ+s"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 45D97H0gsvz9sB8 for ; Wed, 29 May 2019 09:30:18 +1000 (AEST) Received: by lists.denx.de (Postfix, from userid 105) id 838E0C21C4A; Tue, 28 May 2019 23:30:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 1052FC21C27; Tue, 28 May 2019 23:30:14 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 9A138C21C27; Tue, 28 May 2019 23:30:12 +0000 (UTC) Received: from ssl.serverraum.org (ssl.serverraum.org [176.9.125.105]) by lists.denx.de (Postfix) with ESMTPS id 6E29EC21BE5 for ; Tue, 28 May 2019 23:30:11 +0000 (UTC) Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id E2C832223A; Wed, 29 May 2019 01:30:10 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1559086211; bh=CWRk4v8p97F9/hvMouAq0GOqS/T0NAeUAvS5pBoO52M=; h=From:To:Cc:Subject:Date:From; b=fuLdqQ+sfUdyuJ3zEZnVHDxS3AsOVvw/VaX+SHEbLpfyqXzZJINLKBR974GaRfh4e LZm+Iw6E0++sTIAw7JCTKvB0pl8JVOPf/KqmvgBqVMMddeK3IQM6dRHyLtfXxQJ/24 pp5xK4DsW5qfh3BvNRHyR4xVBXAntOKUyjptNC2g= From: Michael Walle To: u-boot@lists.denx.de Date: Wed, 29 May 2019 01:29:58 +0200 Message-Id: <20190528232958.5740-1-michael@walle.cc> X-Mailer: git-send-email 2.11.0 X-Virus-Scanned: clamav-milter 0.100.3 at web X-Virus-Status: Clean Cc: Tom Rini , Stefan Roese Subject: [U-Boot] [PATCH v2] rtc: add Microcrystal RV-8803 driver X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" Signed-off-by: Michael Walle --- Btw if anybody notices the compatible string difference to the rv3029 driver, ie mc,rv3029 vs microcrystal,rv8803. The "mc" prefix is actually the legacy one. changes since v1: - enable driver in sandbox_defconfig and sandbox64_defconfig configs/sandbox64_defconfig | 1 + configs/sandbox_defconfig | 1 + drivers/rtc/Kconfig | 10 +++ drivers/rtc/Makefile | 1 + drivers/rtc/rv8803.c | 167 ++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 180 insertions(+) create mode 100644 drivers/rtc/rv8803.c diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig index 61175e8063..9b63fb0066 100644 --- a/configs/sandbox64_defconfig +++ b/configs/sandbox64_defconfig @@ -163,6 +163,7 @@ CONFIG_REMOTEPROC_SANDBOX=y CONFIG_DM_RESET=y CONFIG_SANDBOX_RESET=y CONFIG_DM_RTC=y +CONFIG_RTC_RV8803=y CONFIG_SANDBOX_SERIAL=y CONFIG_SMEM=y CONFIG_SANDBOX_SMEM=y diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig index ff01315bd8..d57b95a989 100644 --- a/configs/sandbox_defconfig +++ b/configs/sandbox_defconfig @@ -179,6 +179,7 @@ CONFIG_REMOTEPROC_SANDBOX=y CONFIG_DM_RESET=y CONFIG_SANDBOX_RESET=y CONFIG_DM_RTC=y +CONFIG_RTC_RV8803=y CONFIG_DEBUG_UART_SANDBOX=y CONFIG_SANDBOX_SERIAL=y CONFIG_SMEM=y diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index fd0009b2e2..532e94d337 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -70,6 +70,16 @@ config RTC_RV3029 This driver supports reading and writing the RTC/calendar and the battery-baced SRAM section. +config RTC_RV8803 + bool "Enable RV8803 driver" + depends on DM_RTC + help + The Micro Crystal RV8803 is a high accuracy, ultra-low power I2C + Real Time Clock (RTC) with temperature compensation. + + This driver supports reading and writing the RTC/calendar and + detects total power failures. + config RTC_RX8010SJ bool "Enable RX8010SJ driver" depends on DM_RTC diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 1724602f1c..915adb87fe 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_RTC_PL031) += pl031.o obj-$(CONFIG_RTC_PT7C4338) += pt7c4338.o obj-$(CONFIG_RTC_RS5C372A) += rs5c372.o obj-$(CONFIG_RTC_RV3029) += rv3029.o +obj-$(CONFIG_RTC_RV8803) += rv8803.o obj-$(CONFIG_RTC_RX8025) += rx8025.o obj-$(CONFIG_RTC_RX8010SJ) += rx8010sj.o obj-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o diff --git a/drivers/rtc/rv8803.c b/drivers/rtc/rv8803.c new file mode 100644 index 0000000000..2ab40f0833 --- /dev/null +++ b/drivers/rtc/rv8803.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Date & Time support for Micro Crystal RV-8803-C7. + * + * based on ds1307.c which is + * (C) Copyright 2001, 2002, 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * Keith Outwater, keith_outwater@mvis.com` + * Steven Scholz, steven.scholz@imc-berlin.de + * + */ + +#include +#include +#include +#include +#include + +/* + * RTC register addresses + */ +#define RTC_SEC_REG_ADDR 0x00 +#define RTC_MIN_REG_ADDR 0x01 +#define RTC_HR_REG_ADDR 0x02 +#define RTC_DAY_REG_ADDR 0x03 +#define RTC_DATE_REG_ADDR 0x04 +#define RTC_MON_REG_ADDR 0x05 +#define RTC_YR_REG_ADDR 0x06 + +#define RTC_FLAG_REG_ADDR 0x0E +#define RTC_FLAG_BIT_V1F BIT(0) +#define RTC_FLAG_BIT_V2F BIT(1) + +#define RTC_CTL_REG_ADDR 0x0F +#define RTC_CTL_BIT_RST BIT(0) + +static int rv8803_rtc_set(struct udevice *dev, const struct rtc_time *tm) +{ + int ret; + u8 buf[7]; + + debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + if (tm->tm_year < 2000 || tm->tm_year > 2099) + printf("WARNING: year should be between 2000 and 2099!\n"); + + buf[RTC_YR_REG_ADDR] = bin2bcd(tm->tm_year % 100); + buf[RTC_MON_REG_ADDR] = bin2bcd(tm->tm_mon); + buf[RTC_DAY_REG_ADDR] = 1 << (tm->tm_wday & 0x7); + buf[RTC_DATE_REG_ADDR] = bin2bcd(tm->tm_mday); + buf[RTC_HR_REG_ADDR] = bin2bcd(tm->tm_hour); + buf[RTC_MIN_REG_ADDR] = bin2bcd(tm->tm_min); + buf[RTC_SEC_REG_ADDR] = bin2bcd(tm->tm_sec); + + ret = dm_i2c_write(dev, 0, buf, sizeof(buf)); + if (ret < 0) + return ret; + + return 0; +} + +static int rv8803_rtc_get(struct udevice *dev, struct rtc_time *tm) +{ + int ret; + u8 buf[7]; + int flags; + + flags = dm_i2c_reg_read(dev, RTC_FLAG_REG_ADDR); + if (flags < 0) + return flags; + debug("%s: flags=%Xh\n", __func__, flags); + + if (flags & RTC_FLAG_BIT_V1F) + printf("### Warning: temperature compensation has stopped\n"); + + if (flags & RTC_FLAG_BIT_V2F) { + printf("### Warning: Voltage low, data is invalid\n"); + return -1; + } + + ret = dm_i2c_read(dev, 0, buf, sizeof(buf)); + if (ret < 0) + return ret; + + tm->tm_sec = bcd2bin(buf[RTC_SEC_REG_ADDR] & 0x7F); + tm->tm_min = bcd2bin(buf[RTC_MIN_REG_ADDR] & 0x7F); + tm->tm_hour = bcd2bin(buf[RTC_HR_REG_ADDR] & 0x3F); + tm->tm_mday = bcd2bin(buf[RTC_DATE_REG_ADDR] & 0x3F); + tm->tm_mon = bcd2bin(buf[RTC_MON_REG_ADDR] & 0x1F); + tm->tm_year = bcd2bin(buf[RTC_YR_REG_ADDR]) + 2000; + tm->tm_wday = fls(buf[RTC_DAY_REG_ADDR] & 0x7F) - 1; + tm->tm_yday = 0; + tm->tm_isdst = 0; + + debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + return 0; +} + +static int rv8803_rtc_reset(struct udevice *dev) +{ + int ret; + struct rtc_time tmp = { + .tm_year = 2000, + .tm_mon = 1, + .tm_mday = 1, + .tm_hour = 0, + .tm_min = 0, + .tm_sec = 0, + }; + + /* assert reset */ + ret = dm_i2c_reg_write(dev, RTC_CTL_REG_ADDR, RTC_CTL_BIT_RST); + if (ret < 0) + return ret; + + /* clear all flags */ + ret = dm_i2c_reg_write(dev, RTC_FLAG_REG_ADDR, 0); + if (ret < 0) + return ret; + + ret = rv8803_rtc_set(dev, &tmp); + if (ret < 0) + return ret; + + /* clear reset */ + ret = dm_i2c_reg_write(dev, RTC_CTL_REG_ADDR, 0); + if (ret < 0) + return ret; + + debug("RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n", + tmp.tm_year, tmp.tm_mon, tmp.tm_mday, + tmp.tm_hour, tmp.tm_min, tmp.tm_sec); + + return 0; +} + +static int rv8803_probe(struct udevice *dev) +{ + i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS | + DM_I2C_CHIP_WR_ADDRESS); + + return 0; +} + +static const struct rtc_ops rv8803_rtc_ops = { + .get = rv8803_rtc_get, + .set = rv8803_rtc_set, + .reset = rv8803_rtc_reset, +}; + +static const struct udevice_id rv8803_rtc_ids[] = { + { .compatible = "microcrystal,rv8803", }, + { } +}; + +U_BOOT_DRIVER(rtc_rv8803) = { + .name = "rtc-rv8803", + .id = UCLASS_RTC, + .probe = rv8803_probe, + .of_match = rv8803_rtc_ids, + .ops = &rv8803_rtc_ops, +};