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[209.132.180.67]) by mx.google.com with ESMTP id t19si13084368pjr.41.2019.09.02.19.05.54; Mon, 02 Sep 2019 19:06:09 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726856AbfICCFE (ORCPT + 99 others); Mon, 2 Sep 2019 22:05:04 -0400 Received: from inva020.nxp.com ([92.121.34.13]:45066 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725306AbfICCFD (ORCPT ); Mon, 2 Sep 2019 22:05:03 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 6770C1A099C; Tue, 3 Sep 2019 04:05:01 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 68CCA1A098B; Tue, 3 Sep 2019 04:04:43 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 0813C402B7; Tue, 3 Sep 2019 10:04:28 +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, daniel.baluta@nxp.com, leonard.crestez@nxp.com, mripard@kernel.org, olof@lixom.net, arnd@arndb.de, jagan@amarulasolutions.com, bjorn.andersson@linaro.org, dinguyen@kernel.org, marcin.juszkiewicz@linaro.org, stefan@agner.ch, gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, yuehaibing@huawei.com, tglx@linutronix.de, ronald@innovation.ch, m.felsch@pengutronix.de, ping.bai@nxp.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org Cc: Linux-imx@nxp.com Subject: [PATCH V2 2/5] input: keyboard: imx_sc: Add i.MX system controller power key support Date: Tue, 3 Sep 2019 10:03:41 -0400 Message-Id: <1567519424-32271-2-git-send-email-Anson.Huang@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1567519424-32271-1-git-send-email-Anson.Huang@nxp.com> References: <1567519424-32271-1-git-send-email-Anson.Huang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 power key etc.. Adds i.MX system controller power key driver support, Linux kernel has to communicate with system controller via MU (message unit) IPC to get power key's status. Signed-off-by: Anson Huang --- Changes since V1: - remove "wakeup-source" property operation, scu power key uses generic scu irq, no need to have this property for device wakeup operation. --- drivers/input/keyboard/Kconfig | 7 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/imx_sc_pwrkey.c | 169 +++++++++++++++++++++++++++++++++ 3 files changed, 177 insertions(+) create mode 100644 drivers/input/keyboard/imx_sc_pwrkey.c diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 2e6d288..3aaeb9c 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_PWRKEY + tristate "IMX SCU Power Key Driver" + depends on IMX_SCU + help + This is the system controller powerkey 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..9ea5585 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-$(CONFIG_KEYBOARD_IMX_SC_PWRKEY) += imx_sc_pwrkey.o obj-$(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_pwrkey.c b/drivers/input/keyboard/imx_sc_pwrkey.c new file mode 100644 index 0000000..53aa9a4 --- /dev/null +++ b/drivers/input/keyboard/imx_sc_pwrkey.c @@ -0,0 +1,169 @@ +// 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_pwrkey_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_msg_pwrkey { + struct imx_sc_rpc_msg hdr; + u8 state; +}; +static struct imx_pwrkey_drv_data *pdata; +static struct imx_sc_ipc *pwrkey_ipc_handle; + +static int imx_sc_pwrkey_notify(struct notifier_block *nb, + unsigned long event, void *group) +{ + if ((event & SC_IRQ_BUTTON) && (*(u8 *)group == SC_IRQ_GROUP_WAKE) + && !pdata->delay_check) { + pdata->delay_check = 1; + schedule_delayed_work(&pdata->check_work, + msecs_to_jiffies(REPEAT_INTERVAL)); + } + + return 0; +} + +static void imx_sc_check_for_events(struct work_struct *work) +{ + struct input_dev *input = pdata->input; + struct imx_sc_msg_pwrkey msg; + struct imx_sc_rpc_msg *hdr = &msg.hdr; + bool state; + + 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; + + /* + * Current SCU firmware does NOT have return value for + * this API, that means it is always successful. + */ + imx_scu_call_rpc(pwrkey_ipc_handle, &msg, true); + state = msg.state; + + if (!state && !pdata->keystate) + state = true; + + if (state ^ pdata->keystate) { + pm_wakeup_event(input->dev.parent, 0); + pdata->keystate = !!state; + input_event(input, EV_KEY, pdata->keycode, !!state); + input_sync(input); + if (!state) + pdata->delay_check = 0; + pm_relax(pdata->input->dev.parent); + } + + if (state) + schedule_delayed_work(&pdata->check_work, + msecs_to_jiffies(DEBOUNCE_TIME)); +} + +static struct notifier_block imx_sc_pwrkey_notifier = { + .notifier_call = imx_sc_pwrkey_notify, +}; + +static int imx_sc_pwrkey_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct input_dev *input; + int ret; + + ret = imx_scu_get_handle(&pwrkey_ipc_handle); + if (ret) + return ret; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + if (of_property_read_u32(np, "linux,keycode", &pdata->keycode)) { + pdata->keycode = KEY_POWER; + dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n"); + } + + INIT_DELAYED_WORK(&pdata->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-pwrkey/input0"; + input->id.bustype = BUS_HOST; + + input_set_capability(input, EV_KEY, pdata->keycode); + + ret = input_register_device(input); + if (ret < 0) { + dev_err(&pdev->dev, "failed to register input device\n"); + return ret; + } + + pdata->input = input; + platform_set_drvdata(pdev, pdata); + + 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; + } + + ret = imx_scu_irq_register_notifier(&imx_sc_pwrkey_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 const struct of_device_id imx_sc_pwrkey_ids[] = { + { .compatible = "fsl,imx-sc-pwrkey" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx_sc_pwrkey_ids); + +static struct platform_driver imx_sc_pwrkey_driver = { + .driver = { + .name = "imx-sc-pwrkey", + .of_match_table = imx_sc_pwrkey_ids, + }, + .probe = imx_sc_pwrkey_probe, +}; +module_platform_driver(imx_sc_pwrkey_driver); + +MODULE_AUTHOR("Anson Huang "); +MODULE_DESCRIPTION("i.MX System Controller Power Key Driver"); +MODULE_LICENSE("GPL v2"); -- 2.7.4