From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4CB9C4CEC4 for ; Mon, 16 Sep 2019 02:54:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A3A0C214AF for ; Mon, 16 Sep 2019 02:54:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="mgkBMb3E" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3A0C214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=PpSH8CujDp2MfBY55E72qoBLOIhedY6Xh3lGFDR9zCo=; b=mgkBMb3EWWNdnKiVrGZqGzwAW6 8miHht6jm2fpelK4wFzQSPwnDhNicMpsErjUF99a1v7ITZg/M8z07+aRwVDv4kJ2Eak1RHfMdUGRf Uj/EOCjoO70jRivSkeRSCOdkI+6MnMaKH3jOc8lZusSfyb5tZeaZQwi2zwrxRgcU+9ut/tsQhPWkV 3SGwZsOHXPzIeqq1rE8BQmOHyeZL4kcabFIJX6qrCzYcR8Eg+KijYkItCGVOyNBp0K6bo91F5uJAi HmoFZkNmlcPTy+VB4cWiepeEZ5aUYrsaN1MQ/AV0QwbRpisKpzsBOjpq1f37L7qw+A2QJzszwGdnC VKkwud8w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i9hA9-00051Q-Qm; Mon, 16 Sep 2019 02:54:50 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1i9h9x-0004mv-9v for linux-arm-kernel@lists.infradead.org; Mon, 16 Sep 2019 02:54:39 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id CB10F200513; Mon, 16 Sep 2019 04:54:35 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 7239C20089C; Mon, 16 Sep 2019 04:54:17 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 8BCD2402A8; Mon, 16 Sep 2019 10:53:57 +0800 (SGT) From: Anson Huang To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, catalin.marinas@arm.com, will@kernel.org, dmitry.torokhov@gmail.com, aisheng.dong@nxp.com, ulf.hansson@linaro.org, fugang.duan@nxp.com, peng.fan@nxp.com, leonard.crestez@nxp.com, daniel.baluta@nxp.com, olof@lixom.net, mripard@kernel.org, arnd@arndb.de, jagan@amarulasolutions.com, dinguyen@kernel.org, bjorn.andersson@linaro.org, marcin.juszkiewicz@linaro.org, andriy.shevchenko@linux.intel.com, yuehaibing@huawei.com, cw00.choi@samsung.com, enric.balletbo@collabora.com, m.felsch@pengutronix.de, ping.bai@nxp.com, ronald@innovation.ch, stefan@agner.ch, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org Subject: [PATCH V4 2/5] input: keyboard: imx_sc: Add i.MX system controller key support Date: Mon, 16 Sep 2019 10:52:50 +0800 Message-Id: <1568602373-14164-2-git-send-email-Anson.Huang@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568602373-14164-1-git-send-email-Anson.Huang@nxp.com> References: <1568602373-14164-1-git-send-email-Anson.Huang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190915_195437_718579_C5AABD89 X-CRM114-Status: GOOD ( 16.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Linux-imx@nxp.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org i.MX8QXP is an ARMv8 SoC which has a Cortex-M4 system controller inside, the system controller is in charge of controlling power, clock and scu key etc.. Adds i.MX system controller key driver support, Linux kernel has to communicate with system controller via MU (message unit) IPC to get scu key's status. Signed-off-by: Anson Huang --- Changes since V3: - switch the debounce and repeat interval time for delay work schdule; - add .remove to handle group irq and notify etc.. --- drivers/input/keyboard/Kconfig | 7 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/imx_sc_key.c | 190 ++++++++++++++++++++++++++++++++++++ 3 files changed, 198 insertions(+) create mode 100644 drivers/input/keyboard/imx_sc_key.c diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 8911bc2..00f8428 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -469,6 +469,13 @@ config KEYBOARD_IMX To compile this driver as a module, choose M here: the module will be called imx_keypad. +config KEYBOARD_IMX_SC_KEY + tristate "IMX SCU Key Driver" + depends on IMX_SCU + help + This is the system controller key driver for NXP i.MX SoCs with + system controller inside. + config KEYBOARD_NEWTON tristate "Newton keyboard" select SERIO diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 9510325..f5b1752 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o +obj-$(CONFIG_KEYBOARD_IMX_SC_KEY) += imx_sc_key.o obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o obj-$(CONFIG_KEYBOARD_LKKBD) += lkkbd.o diff --git a/drivers/input/keyboard/imx_sc_key.c b/drivers/input/keyboard/imx_sc_key.c new file mode 100644 index 0000000..59c68fa --- /dev/null +++ b/drivers/input/keyboard/imx_sc_key.c @@ -0,0 +1,190 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DEBOUNCE_TIME 100 +#define REPEAT_INTERVAL 60 + +#define SC_IRQ_BUTTON 1 +#define SC_IRQ_GROUP_WAKE 3 +#define IMX_SC_MISC_FUNC_GET_BUTTON_STATUS 18 + +struct imx_key_drv_data { + int keycode; + bool keystate; /* 1: pressed, 0: release */ + bool delay_check; + struct delayed_work check_work; + struct input_dev *input; + struct imx_sc_ipc *key_ipc_handle; + struct notifier_block key_notifier; +}; + +struct imx_sc_msg_key { + struct imx_sc_rpc_msg hdr; + u8 state; +}; + +static int imx_sc_key_notify(struct notifier_block *nb, + unsigned long event, void *group) +{ + struct imx_key_drv_data *priv = + container_of(nb, + struct imx_key_drv_data, + key_notifier); + + if ((event & SC_IRQ_BUTTON) && (*(u8 *)group == SC_IRQ_GROUP_WAKE) + && !priv->delay_check) { + priv->delay_check = 1; + schedule_delayed_work(&priv->check_work, + msecs_to_jiffies(DEBOUNCE_TIME)); + } + + return 0; +} + +static void imx_sc_check_for_events(struct work_struct *work) +{ + struct imx_key_drv_data *priv = + container_of(work, + struct imx_key_drv_data, + check_work.work); + struct input_dev *input = priv->input; + struct imx_sc_msg_key msg; + struct imx_sc_rpc_msg *hdr = &msg.hdr; + bool state; + int ret; + + hdr->ver = IMX_SC_RPC_VERSION; + hdr->svc = IMX_SC_RPC_SVC_MISC; + hdr->func = IMX_SC_MISC_FUNC_GET_BUTTON_STATUS; + hdr->size = 1; + + ret = imx_scu_call_rpc(priv->key_ipc_handle, &msg, true); + if (ret) { + dev_err(&input->dev, "read imx sc key failed, ret %d\n", ret); + return; + } + + state = (bool)msg.state; + + if (!state && !priv->keystate) + state = true; + + if (state ^ priv->keystate) { + pm_wakeup_event(input->dev.parent, 0); + priv->keystate = state; + input_event(input, EV_KEY, priv->keycode, state); + input_sync(input); + if (!state) + priv->delay_check = 0; + pm_relax(priv->input->dev.parent); + } + + if (state) + schedule_delayed_work(&priv->check_work, + msecs_to_jiffies(REPEAT_INTERVAL)); +} + +static int imx_sc_key_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + static struct imx_key_drv_data *priv; + struct input_dev *input; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = imx_scu_get_handle(&priv->key_ipc_handle); + if (ret) + return ret; + + if (of_property_read_u32(np, "linux,keycode", &priv->keycode)) { + dev_err(&pdev->dev, "missing KEY_POWER in DT\n"); + return -EINVAL; + } + + INIT_DELAYED_WORK(&priv->check_work, imx_sc_check_for_events); + + input = devm_input_allocate_device(&pdev->dev); + if (!input) { + dev_err(&pdev->dev, "failed to allocate the input device\n"); + return -ENOMEM; + } + + input->name = pdev->name; + input->phys = "imx-sc-key/input0"; + input->id.bustype = BUS_HOST; + + input_set_capability(input, EV_KEY, priv->keycode); + + ret = input_register_device(input); + if (ret) { + dev_err(&pdev->dev, "failed to register input device\n"); + return ret; + } + + priv->input = input; + platform_set_drvdata(pdev, priv); + + ret = imx_scu_irq_group_enable(SC_IRQ_GROUP_WAKE, SC_IRQ_BUTTON, true); + if (ret) { + dev_warn(&pdev->dev, "enable scu group irq failed\n"); + return ret; + } + + priv->key_notifier.notifier_call = imx_sc_key_notify; + ret = imx_scu_irq_register_notifier(&priv->key_notifier); + if (ret) { + imx_scu_irq_group_enable(SC_IRQ_GROUP_WAKE, SC_IRQ_BUTTON, false); + dev_warn(&pdev->dev, "register scu notifier failed\n"); + } + + return ret; +} + +static int imx_sc_key_remove(struct platform_device *pdev) +{ + struct imx_key_drv_data *priv = platform_get_drvdata(pdev); + + imx_scu_irq_group_enable(SC_IRQ_GROUP_WAKE, SC_IRQ_BUTTON, false); + imx_scu_irq_unregister_notifier(&priv->key_notifier); + cancel_delayed_work_sync(&priv->check_work); + + return 0; +} + +static const struct of_device_id imx_sc_key_ids[] = { + { .compatible = "fsl,imx-sc-key" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx_sc_key_ids); + +static struct platform_driver imx_sc_key_driver = { + .driver = { + .name = "imx-sc-key", + .of_match_table = imx_sc_key_ids, + }, + .probe = imx_sc_key_probe, + .remove = imx_sc_key_remove, +}; +module_platform_driver(imx_sc_key_driver); + +MODULE_AUTHOR("Anson Huang "); +MODULE_DESCRIPTION("i.MX System Controller Key Driver"); +MODULE_LICENSE("GPL v2"); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel