From patchwork Fri May 5 17:25:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 13232862 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6AECC77B7F for ; Fri, 5 May 2023 17:25:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232137AbjEERZw (ORCPT ); Fri, 5 May 2023 13:25:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57860 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231616AbjEERZv (ORCPT ); Fri, 5 May 2023 13:25:51 -0400 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 37D27160BE for ; Fri, 5 May 2023 10:25:50 -0700 (PDT) X-IronPort-AV: E=Sophos;i="5.99,252,1677510000"; d="scan'208";a="161757935" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 06 May 2023 02:25:49 +0900 Received: from localhost.localdomain (unknown [10.226.92.145]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 3483B4073785; Sat, 6 May 2023 02:25:46 +0900 (JST) From: Biju Das To: Lee Jones Cc: Biju Das , Geert Uytterhoeven , Alessandro Zummo , Alexandre Belloni , Magnus Damm , linux-renesas-soc@vger.kernel.org, Fabrizio Castro Subject: [PATCH v2 4/5] mfd: Add Renesas PMIC RAA215300 RTC driver Date: Fri, 5 May 2023 18:25:29 +0100 Message-Id: <20230505172530.357455-5-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230505172530.357455-1-biju.das.jz@bp.renesas.com> References: <20230505172530.357455-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Currently, it is not possible to instantiate the i2c client driver using MFD cell as it is not a platform driver. Add support for Renesas PMIC RAA215300 RTC platform driver, so that it can be instantiated by MFD API. The rtc device is created by using i2c_new_ancillary_device() and  it register as the rtc device by the helper function provided by rtc-isl2108 driver. The PMIC driver enables RTC device and share the PMIC revision to RTC platform driver. Signed-off-by: Biju Das --- v2: * New patch --- drivers/mfd/Kconfig | 7 +++++ drivers/mfd/Makefile | 1 + drivers/mfd/raa215300-rtc.c | 52 +++++++++++++++++++++++++++++++++++++ drivers/mfd/raa215300.c | 38 ++++++++++++++++++++++++--- 4 files changed, 95 insertions(+), 3 deletions(-) create mode 100644 drivers/mfd/raa215300-rtc.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 9071b0f27b62..cec20c1f143d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -318,6 +318,13 @@ config PMIC_RAA215300 help Support for the Renesas RAA215300 PMIC. +config PMIC_RAA215300_RTC + tristate "Renesas RAA215300 RTC driver" + depends on PMIC_RAA215300 + select RTC_DRV_ISL1208 + help + Select this to get support for the Renesas RAA215300 RTC + config PMIC_DA903X bool "Dialog Semiconductor DA9030/DA9034 PMIC Support" depends on I2C=y diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index d9c601120bfd..ed4b760e564e 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -127,6 +127,7 @@ obj-$(CONFIG_MCP_UCB1200) += ucb1x00-assabet.o endif obj-$(CONFIG_PMIC_RAA215300) += raa215300.o +obj-$(CONFIG_PMIC_RAA215300_RTC) += raa215300-rtc.o obj-$(CONFIG_PMIC_DA903X) += da903x.o diff --git a/drivers/mfd/raa215300-rtc.c b/drivers/mfd/raa215300-rtc.c new file mode 100644 index 000000000000..309ed34d6cd7 --- /dev/null +++ b/drivers/mfd/raa215300-rtc.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas RAA215300 RTC Driver + * + * Copyright (C) 2023 Renesas Electronics Corporation + */ + +#include +#include +#include +#include +#include + +#define RAA215300_RTC_DEFAULT_ADDR 0x6f + +static void raa215300_rtc_unregister_device(void *data) +{ + i2c_unregister_device(data); +} + +static int raa215300_rtc_probe(struct platform_device *pdev) +{ + unsigned int *pmic_version = dev_get_drvdata(pdev->dev.parent); + struct i2c_client *client; + int ret; + + client = i2c_new_ancillary_device(to_i2c_client(pdev->dev.parent), + "rtc", RAA215300_RTC_DEFAULT_ADDR); + if (IS_ERR(client)) + return PTR_ERR(client); + + ret = devm_add_action_or_reset(&pdev->dev, + raa215300_rtc_unregister_device, client); + if (ret < 0) + return ret; + + return raa215300_rtc_probe_helper(client, *pmic_version); +} + +static struct platform_driver raa215300_rtc_driver = { + .probe = raa215300_rtc_probe, + .driver = { + .name = "raa215300-rtc", + }, +}; +module_platform_driver(raa215300_rtc_driver); + +MODULE_DESCRIPTION("Renesas RAA215300 MFD RTC Driver"); +MODULE_ALIAS("platform:raa215300-rtc"); +MODULE_AUTHOR("Biju Das "); +MODULE_LICENSE("GPL"); +MODULE_SOFTDEP("post: rtc_isl1208"); diff --git a/drivers/mfd/raa215300.c b/drivers/mfd/raa215300.c index 5cdd3213e99c..c8bdf96b203f 100644 --- a/drivers/mfd/raa215300.c +++ b/drivers/mfd/raa215300.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include @@ -29,13 +30,26 @@ static const struct regmap_config raa215300_regmap_config = { .cache_type = REGCACHE_FLAT, }; +static const struct mfd_cell raa215300_rtc_dev[] = { + { .name = "raa215300-rtc" } +}; + +static void raa215300_remove_devices(void *data) +{ + mfd_remove_devices(data); +} + static int raa215300_i2c_probe(struct i2c_client *client) { struct device *dev = &client->dev; - unsigned int pmic_version; + unsigned int *pmic_version; struct regmap *regmap; int ret; + pmic_version = devm_kzalloc(dev, sizeof(*pmic_version), GFP_KERNEL); + if (!pmic_version) + return -ENOMEM; + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -EOPNOTSUPP; @@ -44,11 +58,29 @@ static int raa215300_i2c_probe(struct i2c_client *client) return dev_err_probe(dev, PTR_ERR(regmap), "regmap i2c init failed\n"); - ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version); + ret = regmap_read(regmap, RAA215300_HW_REV, pmic_version); if (ret < 0) return dev_err_probe(dev, ret, "HW rev read failed\n"); - dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version); + dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", *pmic_version); + dev_set_drvdata(dev, pmic_version); + + if (of_property_read_bool(dev->of_node, "renesas,rtc-enabled")) { + /* Enable RTC block */ + regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN, + RAA215300_REG_BLOCK_EN_RTC_EN, + RAA215300_REG_BLOCK_EN_RTC_EN); + + ret = mfd_add_devices(dev, 0, raa215300_rtc_dev, + ARRAY_SIZE(raa215300_rtc_dev), NULL, + 0, NULL); + if (ret < 0) + return ret; + + ret = devm_add_action_or_reset(dev, raa215300_remove_devices, dev); + if (ret < 0) + return ret; + } return 0; }