From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f44.google.com (mail-wr1-f44.google.com [209.85.221.44]) (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 CFD8D442384 for ; Mon, 10 Aug 2026 19:40:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786390834; cv=none; b=Q9CahLkjuRtfinmSOnH/JP8Xf1FP1YYR3JAms4d3MgRZLcAlJWunMRElEaoW6rLHDYvr0HflxuiWmjlj9aEblt+p7TufiXkAPLthVQw9ipwFj6zgYm5gYMz6sb+YP9GSyuAhumkaYgriRJEWg5zvqJC3HoEQ/mDDbE1wU830OIM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786390834; c=relaxed/simple; bh=L/Xi+O03EBynElRL7L0vL8qcfN7hIjPo8s3prz4BfVc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RqVkxFHpvLK1hBmyT/it9moJEq/SXAyXtseZMDEfQpuIvBH4MDWYeB7gZwtyB0hF8ViIgSrS1WV+Ukd8hCutBvD5zJZfLq9OZ8gFk1Rrv7aaQMnjaB+UL4uf/0e1hi89biEiHL41upzLyc7cPzzbGYxDwYGOClqfhdxEpA0GN4I= 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=sh2BVM3M; arc=none smtp.client-ip=209.85.221.44 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="sh2BVM3M" Received: by mail-wr1-f44.google.com with SMTP id ffacd0b85a97d-47f6609c657so1183290f8f.2 for ; Mon, 10 Aug 2026 12:40:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786390815; x=1786995615; 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=yR/4hjRVD3BKmEkJnBlwxN5TsqF/X+OQ8T6Cq6656R0=; b=sh2BVM3MbZ1TpQenwhNDkrzOa//eZtU1WZ3d7nCrM5624be2/XsGn18J/Z3ddz4ewS krMJ63rASnjP23p8K3zCdYPwfl2yllg16OdnFv4ikckH5UDG/MuG8LC8pJWK7AqRXbS8 4NKVCLk+O/Zf39WvP5lp7f9RAJk6KMzwq7G13fRVaoazVi/LhCSX06tSq4+dBYCMcOTi o/aoQRMVHWPgQBZhqlVR//W9eK/zpcBx3TNF29U+1jQGuQ8/Bjkc4b5qnWp7k/FM+56+ lunxS0jjOMxZek6mmK0AB9UIvgfq2bf4FQER3PbKJwJ8T3FM6lta0pHcIF4io7p6hSXt bvSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786390815; x=1786995615; 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=yR/4hjRVD3BKmEkJnBlwxN5TsqF/X+OQ8T6Cq6656R0=; b=FhXiGHoOzQ2iqcoV7pOMlrIQbiBe2ODymLw8YLCQqGbckjRbLCD5ZLMjC7sh1J2xIN YFIZUC60bkD+WSCWQ0EZC29yjWTY4AKwcFfOhYiL+NhRH0l0h/GE+5nTfoe4aKUWMrKm vWR7Y89Ilwu/DEH9A4bxbv3ThCf3FpsOXHNSG0cRuCj64SgC1xV4M8tKZl1k4lBOKFVD uQOIrUIATygpRz/QjkG+AbTiEknLwf8ReZGwBb4Es3dNuNkDjsLDfHyWLHgDbqr/JVW3 ZH4/ADGyqtAo2vm3Sq7XIrzQGPstm+58mgcF4D96qg2vWpTzXWF3V66JCVDi/KTseJcB QZ9Q== X-Forwarded-Encrypted: i=1; AHgh+Rp9TYzTqP8KuWpTYnWWGkwmY0fcZr7wkHh88Six3YcLlsgIcXQ2ba9MxvHa1RQ18DF+N8HIslGAxiZn@vger.kernel.org X-Gm-Message-State: AOJu0YyHgnKaZt8XrXQQ4ac+IPxqhkCH19fp007B5kdkmqoi4y4xBxt3 /HHPtDH3/Nvt6UBRZyaRoT8D1pO6lchgbLtR3YoB0zZqu+MWNkr30DoY X-Gm-Gg: AR+sD11ESUE//fa9sWob3b71NFw5TQowQvwO4diKgXsyyajlfjeY1sJZfKNV0Ebq6ry GQNaFbZiByD1N9u+6jnl92xgj1zpPIIAUOqrF9p8K4Gt62nF54q8Lpwj2vomAnGbVtXdwLwumWL GwYpilx8NExxGEcyQFDPzPTIHQVdgj7vUpD3ouL+5TiEg/Fd+lLCHMfYnMyGzIB0cYk6E4kG+WB 3HoKStzqRwaUq1/M5omDRxjSSOYLMXxOICR761SfOQ7rGMnv0tkFKDARxwl9yL4m0SZof3Jmfmi kOdvrJQ0ie+PJzOn1hailCoeQQeccJfLsVCwXourkhrPbtqB2cBKmQ1ANia8rB5/3W3ML4JF7BT 5Qs3Qpok+ooKZ4W3eTmJ1efNDZpM17qXHbpgFqhe3LbxXPrnaWOJ486OB1Hg/njNbTAKQeVq9wK VCQii8cGGho7Z6Iy9QvulYkD/Ef5h8Z/wmIsA8M2/7gpiUfGR/5ujvL2i4fe1xQzw= X-Received: by 2002:a05:6000:611:b0:47f:756f:9a8f with SMTP id ffacd0b85a97d-480026edbbcmr34391910f8f.26.1786390815397; Mon, 10 Aug 2026 12:40:15 -0700 (PDT) Received: from antoniarch ([78.213.94.207]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-480021506cbsm39291689f8f.14.2026.08.10.12.40.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2026 12:40:15 -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 v4 9/9] rtc: abx80x: add support for ABX81X Date: Mon, 10 Aug 2026 21:38:26 +0200 Message-ID: <20260810193826.210683-10-apokusinski01@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260810193826.210683-1-apokusinski01@gmail.com> References: <20260810193826.210683-1-apokusinski01@gmail.com> Precedence: bulk X-Mailing-List: devicetree@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 08b22c067699..7145de876b50 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} }; @@ -1073,14 +1076,107 @@ 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