From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CA0CB52ED4F for ; Mon, 7 Sep 2026 20:34:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788813260; cv=none; b=cDzABKQnTz3HWk4i3w/7uFqGK9iFxEyc0fKEaCK/iFpEz0BwHP5fmEX0qUhVOoFhp/RKrgwBhGHWMTYc0cb7b39TWmivOwSTDKUWY+RYnbqf+caxuhE4O9sa85Ogy1p2Qx6X3/oeV0L21X5ODVu1WYDvoithYfJAqdhS/TKhMA4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788813260; c=relaxed/simple; bh=PG2uHUEbkCrEzYXipxjXZRMZBQvnmVaucGzN7IM7zZA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B1oRa+Wnar5N5eBvH8TT97CfLktI8JDFbbMNXWQ/O+dedZxbGiPDWtFjlP7UWv3XJdYaNxXHbIu+PfjHZXsjK9nmtv7YDkOcDO5oXTq52RufyDkGndOXzbBdOqTmDyocwrq4N57FyW63AhTfve88pIlH9eqp1olnaJwJuelDyeY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=q3DFGxlJ; arc=none smtp.client-ip=209.85.128.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="q3DFGxlJ" Received: by mail-wm1-f47.google.com with SMTP id 5b1f17b1804b1-4980fe6b3beso35293625e9.0 for ; Mon, 07 Sep 2026 13:34:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788813256; x=1789418056; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=7E1qEp5el0vMy4z578Uuf+/aSLygb8nTGKBm40Vll7E=; b=q3DFGxlJo05mK7li1bO16cZ/KeRXxWuFrg86TdIxlJi2VnEv6pCMQmjnrV8/ukuxq0 +ESF2iyiWqbdOwGliYoHcWeEwcEI4bI8qLMIp0ZR/XvZsfeNHqseUMDNu9DnzhCF71iu LDAb5JDnCge6kf2TiLO5wxF2rqKLsIERwQH5BvTenf+4LaR46ko+4XwKk+NPpezI90H8 Q+wPkLxWKFJVWfPm/3mq4lRBDZLdPxFggQxNG3gMcwCjM+PKCq9BLsq+aiKPoePLCAX6 MpDq8dF2atSpT3ZnwOS/eO2ugYPU+js2zN7hEJpQeezq8CUy+DtmTD7qN3FB5yBJc5Y8 xfgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788813256; x=1789418056; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=7E1qEp5el0vMy4z578Uuf+/aSLygb8nTGKBm40Vll7E=; b=aahruN3u4EKc1wOkXru/PG64AVHd2tf7bFxRFqa7f5XLTTLW82FWDrKaxKqS0T/ZIH +WvlFW85Kp4f7CHnQlw9dUrhCxK1SNgmfDj7P4dYa3g8GbU+uFAUPzB/qSyfGtv6Nokp mEOo613kgyQk3O9cAyzKczaaGco0DMAhFjvXNhu0DvbyFJ9fQHhZ6VlG0R0ex3Ad9ltK WyvyK1YHPvmXoI9ZT8rzi+NZTkCQxPPIl06x6rw0r9ETP4zyx7/HiJJ+ALwq9ETaSEXr raH/ojt4qv6pGQj95a5ARfKdVOadbD8v9ahRysEqhvro/AP/p0B2mOV+wW33Y4U+2hld P3wg== X-Gm-Message-State: AFuF++mYH1AtXqUZpRT2Kugh4OHvwMDuUf1InF+xl57KCLnS1omfiXtO SFsDYN6Oe8XgkBXLBwjpEhLvQts31DcJE6HSzaNh4+d9hL2sPWpquk3w X-Gm-Gg: AYBFou1d5zznngP7HvZ3Pfdrbt12WNhPopOt1LfxDnpf2u0S0b09N1kPi3nEyfSy66a 6WefKZaiLxcsan6EITgP9bfu2V27RY0Cgr9OERLilk9aAT6jB/1y3l2wBgYHrh5ZOPdSU4UgYh3 NT76R4oio+m6WAO84WVcz18U7y33LNh7kJ8us5TZXOOf9w9S25syRsg2V2zl705cwIKS7XlUawF yrmHj8Of92b61hz+R7Hz4AySMi3tr/cSOKTc+MylvP7KRehU2a31BQJMWVEtWUU+rMQPyw+WH01 4po0Hux+LMOm/yFHBwgWPjzJJ++RX5QLvH+9YpmoIQ9gHE0e7CJDDHw4h/xNJwondHUyv7nHAXG YR/ElkgzxZYfqsv+LP6xMEY9C3OPwXsODCfL6rtkfrd1gO2XAK1e+wGQkOguMPU2GhJUJOZMU1E 1NJd9FPYnQ8uOP9t0B7bOf1k6W98+urQnyQFWuTUpjaGeCk+xqjFDgED/BG2mZAw== X-Received: by 2002:a05:600c:e556:10b0:49d:e27:d381 with SMTP id 5b1f17b1804b1-49d0e27d56cmr71117815e9.6.1788813255885; Mon, 07 Sep 2026 13:34:15 -0700 (PDT) Received: from antoniarch ([78.212.37.227]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4858e239862sm25959116f8f.9.2026.09.07.13.34.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 13:34:15 -0700 (PDT) From: Antoni Pokusinski To: alexandre.belloni@bootlin.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Antoni Pokusinski Subject: [PATCH v6 9/9] rtc: abx80x: add support for ABX81X Date: Mon, 7 Sep 2026 22:32:16 +0200 Message-ID: <20260907203216.53192-10-apokusinski01@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260907203216.53192-1-apokusinski01@gmail.com> References: <20260907203216.53192-1-apokusinski01@gmail.com> Precedence: bulk X-Mailing-List: linux-rtc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Abracon ABX81X is a family of RTCs with SPI interface featuring the same functionalities as the ABX80X I2C clocks. Signed-off-by: Antoni Pokusinski --- drivers/rtc/Kconfig | 26 +++++----- drivers/rtc/rtc-abx80x.c | 106 +++++++++++++++++++++++++++++++++++++-- 2 files changed, 115 insertions(+), 17 deletions(-) diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 4d14bcba616e..d35221f81024 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -212,18 +212,6 @@ config RTC_DRV_ABEOZ9 This driver can also be built as a module. If so, the module will be called rtc-ab-e0z9. -config RTC_DRV_ABX80X - tristate "Abracon ABx80x" - select WATCHDOG_CORE if WATCHDOG - select REGMAP_I2C - help - If you say yes here you get support for Abracon AB080X and AB180X - families of ultra-low-power battery- and capacitor-backed real-time - clock chips. - - This driver can also be built as a module. If so, the module - will be called rtc-abx80x. - config RTC_DRV_AC100 tristate "X-Powers AC100" depends on MFD_AC100 @@ -955,6 +943,20 @@ config RTC_I2C_AND_SPI comment "SPI and I2C RTC drivers" +config RTC_DRV_ABX80X + tristate "Abracon ABx80x" + depends on RTC_I2C_AND_SPI + select WATCHDOG_CORE if WATCHDOG + select REGMAP_I2C if I2C + select REGMAP_SPI if SPI_MASTER + help + If you say yes here you get support for Abracon AB080X, AB180X, + AB081X and AB181X families of ultra-low-power battery- and + capacitor-backed real-time clock chips. + + This driver can also be built as a module. If so, the module + will be called rtc-abx80x. + config RTC_DRV_DS3232 tristate "Dallas/Maxim DS3232/DS3234" depends on RTC_I2C_AND_SPI diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c index c90407a023fe..c3bf6f0ae48b 100644 --- a/drivers/rtc/rtc-abx80x.c +++ b/drivers/rtc/rtc-abx80x.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* - * A driver for the I2C members of the Abracon AB x8xx RTC family, - * and compatible: AB 1805 and AB 0805 + * A driver for the I2C and SPI members of the Abracon AB x8xx RTC family, + * and compatible: AB 1805, AB 0805, AB 1815 and AB 0815 * * Copyright 2014-2015 Macq S.A. * @@ -19,6 +19,7 @@ #include #include #include +#include #include #define ABX8XX_REG_HTH 0x00 @@ -109,8 +110,8 @@ static u8 trickle_resistors[] = {0, 3, 6, 11}; -enum abx80x_chip {AB0801, AB0803, AB0804, AB0805, - AB1801, AB1803, AB1804, AB1805, RV1805, ABX80X}; +enum abx80x_chip {AB0801, AB0803, AB0804, AB0805, AB0815, + AB1801, AB1803, AB1804, AB1805, AB1815, RV1805, ABX80X}; struct abx80x_cap { u16 pn; @@ -123,10 +124,12 @@ static struct abx80x_cap abx80x_caps[] = { [AB0803] = {.pn = 0x0803}, [AB0804] = {.pn = 0x0804, .has_tc = true, .has_wdog = true}, [AB0805] = {.pn = 0x0805, .has_tc = true, .has_wdog = true}, + [AB0815] = {.pn = 0x0815, .has_tc = true, .has_wdog = true}, [AB1801] = {.pn = 0x1801}, [AB1803] = {.pn = 0x1803}, [AB1804] = {.pn = 0x1804, .has_tc = true, .has_wdog = true}, [AB1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true}, + [AB1815] = {.pn = 0x1815, .has_tc = true, .has_wdog = true}, [RV1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true}, [ABX80X] = {.pn = 0} }; @@ -1078,14 +1081,107 @@ static void abx80x_unregister_driver(void) #endif /* IS_ENABLED(CONFIG_I2C) */ +#if IS_ENABLED(CONFIG_SPI_MASTER) + +static const struct regmap_config abx80x_regmap_config_spi = { + .reg_bits = 8, + .val_bits = 8, + .max_register = ABX8XX_SRAM_BASE + ABX8XX_SRAM_WIN_SIZE - 1, + + .rd_table = &abx80x_read_table, + .wr_table = &abx80x_write_table, + + .write_flag_mask = BIT(7), +}; + +static const struct spi_device_id abx81x_id[] = { + { "ab0815", AB0815 }, + { "ab1815", AB1815 }, + { } +}; +MODULE_DEVICE_TABLE(spi, abx81x_id); + +#ifdef CONFIG_OF +static const struct of_device_id abx81x_of_match[] = { + { + .compatible = "abracon,ab0815", + .data = (void *)AB0815 + }, + { + .compatible = "abracon,ab1815", + .data = (void *)AB1815 + }, + { } +}; +MODULE_DEVICE_TABLE(of, abx81x_of_match); +#endif + +static int abx81x_spi_probe(struct spi_device *spi) +{ + unsigned int part = (uintptr_t)spi_get_device_match_data(spi); + struct regmap *regmap; + + regmap = devm_regmap_init_spi(spi, &abx80x_regmap_config_spi); + if (IS_ERR(regmap)) { + dev_err(&spi->dev, "Unable to allocate regmap\n"); + return PTR_ERR(regmap); + } + + return abx80x_probe(&spi->dev, regmap, spi->irq, + spi->dev.of_node, part); +} + +static struct spi_driver abx81x_driver = { + .driver = { + .name = "rtc-abx81x", + .of_match_table = of_match_ptr(abx81x_of_match), + }, + .probe = abx81x_spi_probe, + .id_table = abx81x_id, +}; + +static int abx81x_register_driver(void) +{ + return spi_register_driver(&abx81x_driver); +} + +static void abx81x_unregister_driver(void) +{ + spi_unregister_driver(&abx81x_driver); +} + +#else + +static int abx81x_register_driver(void) +{ + return 0; +} + +static void abx81x_unregister_driver(void) +{ +} + +#endif /* IS_ENABLED(CONFIG_SPI_MASTER) */ + static int __init abx80x_init(void) { - return abx80x_register_driver(); + int ret; + + ret = abx80x_register_driver(); + if (ret) + return ret; + + ret = abx81x_register_driver(); + if (ret) + abx80x_unregister_driver(); + + return ret; } module_init(abx80x_init); static void __exit abx80x_exit(void) { + abx81x_unregister_driver(); abx80x_unregister_driver(); } module_exit(abx80x_exit); -- 2.55.0