From nobody Tue Jun 23 14:07:34 2026 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 C6175C433EF for ; Thu, 3 Mar 2022 17:39:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233379AbiCCRki (ORCPT ); Thu, 3 Mar 2022 12:40:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46528 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233050AbiCCRkd (ORCPT ); Thu, 3 Mar 2022 12:40:33 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id F31A01A06D9 for ; Thu, 3 Mar 2022 09:39:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646329187; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=bZQctFjnLH/g6bQ03AOVIzIbebLoxrEWUq6Eo5y0QFs=; b=TUARYq3RNVTdEQzj6VPxykdgnol97czyQQHXgGvbdHHviR44zqRdsOTKqt60HzL1QR8Tqm fQ/CEFPfG+oML6gXjhuAhFqk3ddU7RjNv9Qa6UVZpR8bWgFdGtRI4YHwqYeT1dLkd7Afen 2BH+U4xC6YgLCA0RVxw1kW1G/VLoJLw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-447-1uZJ9gMdMQ-J93JNPBxmtg-1; Thu, 03 Mar 2022 12:39:44 -0500 X-MC-Unique: 1uZJ9gMdMQ-J93JNPBxmtg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8A85E1091DA3; Thu, 3 Mar 2022 17:39:42 +0000 (UTC) Received: from cmirabil.remote.csb (unknown [10.22.9.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1DCDB804F2; Thu, 3 Mar 2022 17:39:41 +0000 (UTC) From: Charles Mirabile To: linux-kernel@vger.kernel.org Cc: Charles Mirabile , Serge Schneider , Stefan Wahren , Nicolas Saenz Julienne , Mattias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, fedora-rpi@googlegroups.com, Lee Jones , Mwesigwa Guma , Joel Savitz Subject: [PATCH v7 1/6] drivers/mfd: sensehat: Add Raspberry Pi Sense HAT to simple_mfd_i2c Date: Thu, 3 Mar 2022 12:39:30 -0500 Message-Id: <20220303173935.100622-2-cmirabil@redhat.com> In-Reply-To: <20220303173935.100622-1-cmirabil@redhat.com> References: <20220303173935.100622-1-cmirabil@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This patch adds the compatible string for the Sense HAT device to the list of compatible strings in the simple_mfd_i2c driver so that it can match against the device and load its children and their drivers. Co-developed-by: Mwesigwa Guma Signed-off-by: Mwesigwa Guma Co-developed-by: Joel Savitz Signed-off-by: Joel Savitz Signed-off-by: Charles Mirabile --- drivers/mfd/simple-mfd-i2c.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c index 51536691ad9d..f916a9c84563 100644 --- a/drivers/mfd/simple-mfd-i2c.c +++ b/drivers/mfd/simple-mfd-i2c.c @@ -64,6 +64,7 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c) =20 static const struct of_device_id simple_mfd_i2c_of_match[] =3D { { .compatible =3D "kontron,sl28cpld" }, + { .compatible =3D "raspberrypi,sensehat" }, {} }; MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match); --=20 2.31.1 From nobody Tue Jun 23 14:07:34 2026 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 9D96BC433F5 for ; Thu, 3 Mar 2022 17:40:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234332AbiCCRkv (ORCPT ); Thu, 3 Mar 2022 12:40:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233050AbiCCRkq (ORCPT ); Thu, 3 Mar 2022 12:40:46 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id ED91E1A06F4 for ; Thu, 3 Mar 2022 09:39:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646329199; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=izXQJyyJ1cl2s2LE1IV4GOK79BBe2TKczXsvjIKhk5g=; b=BYWQMbWYZPVCJCk531kXdVc5NWQhML4ZFzOc5hkgIRtuNvSMcTn++dkIDfyubT6HCFhpLF U73Tzlb2KewgYnKSOQyaI8SrxCfDdFJSZXKGTdqRz8aBzx7cpvMwvPVZqEb4ue/kEhwgcj TZZ8Jvek8wXaaaKGPnn0E5WCRaOtXqU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-561-mvWeT6JdMCynYWatG-XVSw-1; Thu, 03 Mar 2022 12:39:55 -0500 X-MC-Unique: mvWeT6JdMCynYWatG-XVSw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 55C64824FAB; Thu, 3 Mar 2022 17:39:54 +0000 (UTC) Received: from cmirabil.remote.csb (unknown [10.22.9.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id B46EC804EA; Thu, 3 Mar 2022 17:39:44 +0000 (UTC) From: Charles Mirabile To: linux-kernel@vger.kernel.org Cc: Charles Mirabile , Serge Schneider , Stefan Wahren , Nicolas Saenz Julienne , Mattias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, fedora-rpi@googlegroups.com, Dmitry Torokhov , linux-input@vger.kernel.org, Daniel Bauman , Mwesigwa Guma , Joel Savitz Subject: [PATCH v7 2/6] drivers/input/joystick: sensehat: Raspberry Pi Sense HAT joystick driver Date: Thu, 3 Mar 2022 12:39:31 -0500 Message-Id: <20220303173935.100622-3-cmirabil@redhat.com> In-Reply-To: <20220303173935.100622-1-cmirabil@redhat.com> References: <20220303173935.100622-1-cmirabil@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This patch adds the driver for the Sense HAT joystick. It outputs BTN_DPAD key events when moved in any of the four directions and the BTN_SELECT event when depressed. Co-developed-by: Daniel Bauman Signed-off-by: Daniel Bauman Co-developed-by: Mwesigwa Guma Signed-off-by: Mwesigwa Guma Co-developed-by: Joel Savitz Signed-off-by: Joel Savitz Signed-off-by: Charles Mirabile --- drivers/input/joystick/Kconfig | 11 ++ drivers/input/joystick/Makefile | 1 + drivers/input/joystick/sensehat-joystick.c | 128 +++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/input/joystick/sensehat-joystick.c diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig index 3b23078bc7b5..505a032e2786 100644 --- a/drivers/input/joystick/Kconfig +++ b/drivers/input/joystick/Kconfig @@ -399,4 +399,15 @@ config JOYSTICK_N64 Say Y here if you want enable support for the four built-in controller ports on the Nintendo 64 console. =20 +config JOYSTICK_SENSEHAT + tristate "Raspberry Pi Sense HAT joystick" + depends on INPUT && I2C + select MFD_SIMPLE_MFD_I2C + help + Say Y here if you want to enable the driver for the + the Raspberry Pi Sense HAT. + + To compile this driver as a module, choose M here: the + module will be called sensehat_joystick. + endif diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makef= ile index 5174b8aba2dd..39c8b5c6e5ae 100644 --- a/drivers/input/joystick/Makefile +++ b/drivers/input/joystick/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_JOYSTICK_N64) +=3D n64joy.o obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) +=3D psxpad-spi.o obj-$(CONFIG_JOYSTICK_PXRC) +=3D pxrc.o obj-$(CONFIG_JOYSTICK_QWIIC) +=3D qwiic-joystick.o +obj-$(CONFIG_JOYSTICK_SENSEHAT) +=3D sensehat-joystick.o obj-$(CONFIG_JOYSTICK_SIDEWINDER) +=3D sidewinder.o obj-$(CONFIG_JOYSTICK_SPACEBALL) +=3D spaceball.o obj-$(CONFIG_JOYSTICK_SPACEORB) +=3D spaceorb.o diff --git a/drivers/input/joystick/sensehat-joystick.c b/drivers/input/joy= stick/sensehat-joystick.c new file mode 100644 index 000000000000..0a99cf0f3ba0 --- /dev/null +++ b/drivers/input/joystick/sensehat-joystick.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Raspberry Pi Sense HAT joystick driver + * http://raspberrypi.org + * + * Copyright (C) 2015 Raspberry Pi + * Copyright (C) 2021 Charles Mirabile, Mwesigwa Guma, Joel Savitz + * + * Original Author: Serge Schneider + * Revised for upstream Linux by: Charles Mirabile, Mwesigwa Guma, Joel Sa= vitz + */ + +#include +#include +#include +#include +#include +#include +#include + +#define JOYSTICK_SMB_REG 0xf2 + +struct sensehat_joystick { + struct platform_device *pdev; + struct input_dev *keys_dev; + unsigned long prev_states; + struct regmap *regmap; +}; + +static const unsigned int keymap[] =3D { + BTN_DPAD_DOWN, BTN_DPAD_RIGHT, BTN_DPAD_UP, BTN_SELECT, BTN_DPAD_LEFT, +}; + +static irqreturn_t sensehat_joystick_report(int n, void *cookie) +{ + int i, error, keys; + struct sensehat_joystick *sensehat_joystick =3D cookie; + unsigned long curr_states, changes; + + error =3D regmap_read(sensehat_joystick->regmap, JOYSTICK_SMB_REG, &keys); + if (error < 0) { + dev_err(&sensehat_joystick->pdev->dev, + "Failed to read joystick state: %d", error); + return IRQ_NONE; + } + curr_states =3D keys; + bitmap_xor(&changes, &curr_states, &sensehat_joystick->prev_states, + ARRAY_SIZE(keymap)); + + for_each_set_bit(i, &changes, ARRAY_SIZE(keymap)) { + input_report_key(sensehat_joystick->keys_dev, keymap[i], + curr_states & BIT(i)); + } + + input_sync(sensehat_joystick->keys_dev); + sensehat_joystick->prev_states =3D keys; + return IRQ_HANDLED; +} + +static int sensehat_joystick_probe(struct platform_device *pdev) +{ + int error, i, irq; + struct sensehat_joystick *sensehat_joystick =3D devm_kzalloc( + &pdev->dev, sizeof(*sensehat_joystick), GFP_KERNEL); + + sensehat_joystick->pdev =3D pdev; + + sensehat_joystick->regmap =3D dev_get_regmap(sensehat_joystick->pdev->dev= .parent, NULL); + + sensehat_joystick->keys_dev =3D devm_input_allocate_device(&pdev->dev); + if (!sensehat_joystick->keys_dev) { + dev_err(&pdev->dev, "Could not allocate input device.\n"); + return -ENOMEM; + } + + for (i =3D 0; i < ARRAY_SIZE(keymap); i++) + set_bit(keymap[i], sensehat_joystick->keys_dev->keybit); + + sensehat_joystick->keys_dev->name =3D "Raspberry Pi Sense HAT Joystick"; + sensehat_joystick->keys_dev->phys =3D "sensehat-joystick/input0"; + sensehat_joystick->keys_dev->id.bustype =3D BUS_I2C; + sensehat_joystick->keys_dev->evbit[0] =3D + BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); + + error =3D input_register_device(sensehat_joystick->keys_dev); + if (error) { + dev_err(&pdev->dev, "Could not register input device.\n"); + return error; + } + + irq =3D platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "Could not retrieve interrupt request.\n"); + return irq; + } + + error =3D devm_request_threaded_irq(&pdev->dev, irq, NULL, + sensehat_joystick_report, + IRQF_ONESHOT, "keys", + sensehat_joystick); + + if (error) { + dev_err(&pdev->dev, "IRQ request failed.\n"); + return error; + } + + return 0; +} + +static const struct of_device_id sensehat_joystick_device_id[] =3D { + { .compatible =3D "raspberrypi,sensehat-joystick" }, + {}, +}; +MODULE_DEVICE_TABLE(of, sensehat_joystick_device_id); + +static struct platform_driver sensehat_joystick_driver =3D { + .probe =3D sensehat_joystick_probe, + .driver =3D { + .name =3D "sensehat-joystick", + .of_match_table =3D sensehat_joystick_device_id, + }, +}; + +module_platform_driver(sensehat_joystick_driver); + +MODULE_DESCRIPTION("Raspberry Pi Sense HAT joystick driver"); +MODULE_AUTHOR("Serge Schneider "); +MODULE_LICENSE("GPL"); --=20 2.31.1 From nobody Tue Jun 23 14:07:34 2026 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 4C795C433FE for ; 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Thu, 03 Mar 2022 12:40:12 -0500 X-MC-Unique: 3hHfExraPP2WpGqQXUooZg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B45C61854E21; Thu, 3 Mar 2022 17:40:10 +0000 (UTC) Received: from cmirabil.remote.csb (unknown [10.22.9.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id A0E63804EA; Thu, 3 Mar 2022 17:39:56 +0000 (UTC) From: Charles Mirabile To: linux-kernel@vger.kernel.org Cc: Charles Mirabile , Serge Schneider , Stefan Wahren , Nicolas Saenz Julienne , Mattias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, fedora-rpi@googlegroups.com, Miguel Ojeda , Daniel Bauman , Mwesigwa Guma , Joel Savitz Subject: [PATCH v7 3/6] drivers/auxdisplay: sensehat: Raspberry Pi Sense HAT display driver Date: Thu, 3 Mar 2022 12:39:32 -0500 Message-Id: <20220303173935.100622-4-cmirabil@redhat.com> In-Reply-To: <20220303173935.100622-1-cmirabil@redhat.com> References: <20220303173935.100622-1-cmirabil@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This patch adds the driver for the 8x8 RGB LED matrix display on the Sense HAT. It appears as a character device named sense-hat in /dev/. That special file is 128 bytes large and contains 64 RGB565 triples (2 bytes each) one for each pixel. Co-developed-by: Daniel Bauman Signed-off-by: Daniel Bauman Co-developed-by: Mwesigwa Guma Signed-off-by: Mwesigwa Guma Co-developed-by: Joel Savitz Signed-off-by: Joel Savitz Signed-off-by: Charles Mirabile --- drivers/auxdisplay/Kconfig | 8 ++ drivers/auxdisplay/Makefile | 1 + drivers/auxdisplay/sensehat-display.c | 188 ++++++++++++++++++++++++++ 3 files changed, 197 insertions(+) create mode 100644 drivers/auxdisplay/sensehat-display.c diff --git a/drivers/auxdisplay/Kconfig b/drivers/auxdisplay/Kconfig index 64012cda4d12..9bad1aade7a0 100644 --- a/drivers/auxdisplay/Kconfig +++ b/drivers/auxdisplay/Kconfig @@ -203,6 +203,14 @@ config ARM_CHARLCD line and the Linux version on the second line, but that's still useful. =20 +config SENSEHAT_DISPLAY + tristate "Raspberry Pi Sense HAT display driver" + depends on I2C + select MFD_SIMPLE_MFD_I2C + help + This is a driver for the Raspberry Pi Sensehat 8x8 RBG-LED matrix + you can access it as a misc device at /dev/sense-hat + menuconfig PARPORT_PANEL tristate "Parallel port LCD/Keypad Panel support" depends on PARPORT diff --git a/drivers/auxdisplay/Makefile b/drivers/auxdisplay/Makefile index 6968ed4d3f0a..30b2b7934046 100644 --- a/drivers/auxdisplay/Makefile +++ b/drivers/auxdisplay/Makefile @@ -14,3 +14,4 @@ obj-$(CONFIG_HT16K33) +=3D ht16k33.o obj-$(CONFIG_PARPORT_PANEL) +=3D panel.o obj-$(CONFIG_LCD2S) +=3D lcd2s.o obj-$(CONFIG_LINEDISP) +=3D line-display.o +obj-$(CONFIG_SENSEHAT_DISPLAY) +=3D sensehat-display.o diff --git a/drivers/auxdisplay/sensehat-display.c b/drivers/auxdisplay/sen= sehat-display.c new file mode 100644 index 000000000000..56d013d12293 --- /dev/null +++ b/drivers/auxdisplay/sensehat-display.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Raspberry Pi Sense HAT 8x8 LED matrix display driver + * http://raspberrypi.org + * + * Copyright (C) 2015 Raspberry Pi + * Copyright (C) 2021 Charles Mirabile, Mwesigwa Guma, Joel Savitz + * + * Original Author: Serge Schneider + * Revised for upstream Linux by: Charles Mirabile, Mwesigwa Guma, Joel Sa= vitz + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DISPLAY_SMB_REG 0x00 + +struct sensehat_display { + struct platform_device *pdev; + struct miscdevice mdev; + struct mutex rw_mtx; + struct { + u16 b : 5, u : 1, g : 5, r : 5; + } vmem[8][8]; + struct regmap *regmap; +}; + +#define VMEM_SIZE sizeof_field(struct sensehat_display, vmem) + +static void sensehat_update_display(struct sensehat_display *display) +{ + int i, j, ret; + u8 temp[8][3][8]; + + for (i =3D 0; i < 8; ++i) { + for (j =3D 0; j < 8; ++j) + temp[i][0][j] =3D display->vmem[i][j].r; + for (j =3D 0; j < 8; ++j) + temp[i][1][j] =3D display->vmem[i][j].g; + for (j =3D 0; j < 8; ++j) + temp[i][2][j] =3D display->vmem[i][j].b; + } + + ret =3D regmap_bulk_write(display->regmap, DISPLAY_SMB_REG, temp, + sizeof(temp)); + if (ret < 0) + dev_err(&display->pdev->dev, + "Update to 8x8 LED matrix display failed"); +} + +static loff_t sensehat_display_llseek(struct file *filp, loff_t offset, + int whence) +{ + return fixed_size_llseek(filp, offset, whence, VMEM_SIZE); +} + +static ssize_t sensehat_display_read(struct file *filp, char __user *buf, + size_t count, loff_t *f_pos) +{ + struct sensehat_display *sensehat_display =3D + container_of(filp->private_data, struct sensehat_display, mdev); + ssize_t ret =3D -EFAULT; + + if (*f_pos < 0 || *f_pos >=3D VMEM_SIZE) + return 0; + count =3D min_t(size_t, count, VMEM_SIZE - *f_pos); + + if (mutex_lock_interruptible(&sensehat_display->rw_mtx)) + return -ERESTARTSYS; + if (copy_to_user(buf, *f_pos + (char *)sensehat_display->vmem, count)) + goto out; + *f_pos +=3D count; + ret =3D count; +out: + mutex_unlock(&sensehat_display->rw_mtx); + return ret; +} + +static ssize_t sensehat_display_write(struct file *filp, const char __user= *buf, + size_t count, loff_t *f_pos) +{ + struct sensehat_display *sensehat_display =3D + container_of(filp->private_data, struct sensehat_display, mdev); + int ret =3D -EFAULT; + + if (*f_pos < 0 || *f_pos >=3D VMEM_SIZE) + return -EFBIG; + count =3D min_t(size_t, count, VMEM_SIZE - *f_pos); + + if (mutex_lock_interruptible(&sensehat_display->rw_mtx)) + return -ERESTARTSYS; + if (copy_from_user(*f_pos + (char *)sensehat_display->vmem, buf, count)) + goto out; + sensehat_update_display(sensehat_display); + *f_pos +=3D count; + ret =3D count; +out: + mutex_unlock(&sensehat_display->rw_mtx); + return ret; +} + +static const struct file_operations sensehat_display_fops =3D { + .owner =3D THIS_MODULE, + .llseek =3D sensehat_display_llseek, + .read =3D sensehat_display_read, + .write =3D sensehat_display_write, +}; + +static int sensehat_display_probe(struct platform_device *pdev) +{ + int ret; + + struct sensehat_display *sensehat_display =3D + devm_kmalloc(&pdev->dev, sizeof(*sensehat_display), GFP_KERNEL); + + sensehat_display->pdev =3D pdev; + + dev_set_drvdata(&pdev->dev, sensehat_display); + + sensehat_display->regmap =3D dev_get_regmap(pdev->dev.parent, NULL); + + memset(sensehat_display->vmem, 0, VMEM_SIZE); + + mutex_init(&sensehat_display->rw_mtx); + + sensehat_update_display(sensehat_display); + + sensehat_display->mdev =3D (struct miscdevice){ + .minor =3D MISC_DYNAMIC_MINOR, + .name =3D "sense-hat", + .mode =3D 0666, + .fops =3D &sensehat_display_fops, + }; + + ret =3D misc_register(&sensehat_display->mdev); + if (ret < 0) { + dev_err(&pdev->dev, + "Could not register 8x8 LED matrix display.\n"); + return ret; + } + + dev_info(&pdev->dev, + "8x8 LED matrix display registered with minor number %i", + sensehat_display->mdev.minor); + + return 0; +} + +static int sensehat_display_remove(struct platform_device *pdev) +{ + struct sensehat_display *sensehat_display =3D dev_get_drvdata(&pdev->dev); + + misc_deregister(&sensehat_display->mdev); + return 0; +} + +static const struct of_device_id sensehat_display_device_id[] =3D { + { .compatible =3D "raspberrypi,sensehat-display" }, + {}, +}; +MODULE_DEVICE_TABLE(of, sensehat_display_device_id); + +static struct platform_driver sensehat_display_driver =3D { + .probe =3D sensehat_display_probe, + .remove =3D sensehat_display_remove, + .driver =3D { + .name =3D "sensehat-display", + .of_match_table =3D sensehat_display_device_id, + }, +}; + +module_platform_driver(sensehat_display_driver); + +MODULE_DESCRIPTION("Raspberry Pi Sense HAT 8x8 LED matrix display driver"); +MODULE_AUTHOR("Serge Schneider "); +MODULE_LICENSE("GPL"); --=20 2.31.1 From nobody Tue Jun 23 14:07:34 2026 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 CD285C433F5 for ; Thu, 3 Mar 2022 17:40:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234629AbiCCRlS (ORCPT ); Thu, 3 Mar 2022 12:41:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234762AbiCCRlJ (ORCPT ); Thu, 3 Mar 2022 12:41:09 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6AE511A1293 for ; Thu, 3 Mar 2022 09:40:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; 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Thu, 3 Mar 2022 17:40:13 +0000 (UTC) Received: from cmirabil.remote.csb (unknown [10.22.9.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9B3D280FC3; Thu, 3 Mar 2022 17:40:11 +0000 (UTC) From: Charles Mirabile To: linux-kernel@vger.kernel.org Cc: Charles Mirabile , Serge Schneider , Stefan Wahren , Nicolas Saenz Julienne , Mattias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, fedora-rpi@googlegroups.com, Miguel Ojeda , Rob Herring , Dmitry Torokhov , Lee Jones , devicetree@vger.kernel.org, linux-input@vger.kernel.org, Mwesigwa Guma , Joel Savitz Subject: [PATCH v7 4/6] dt-bindings: mfd: sensehat: Add Raspberry Pi Sense HAT schema Date: Thu, 3 Mar 2022 12:39:33 -0500 Message-Id: <20220303173935.100622-5-cmirabil@redhat.com> In-Reply-To: <20220303173935.100622-1-cmirabil@redhat.com> References: <20220303173935.100622-1-cmirabil@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This patch adds the device tree bindings for the Sense HAT and each of its children devices in yaml form. Co-developed-by: Mwesigwa Guma Signed-off-by: Mwesigwa Guma Co-developed-by: Joel Savitz Signed-off-by: Joel Savitz Signed-off-by: Charles Mirabile Reviewed-by: Rob Herring --- .../raspberrypi,sensehat-display.yaml | 27 ++++++++ .../input/raspberrypi,sensehat-joystick.yaml | 33 +++++++++ .../bindings/mfd/raspberrypi,sensehat.yaml | 69 +++++++++++++++++++ 3 files changed, 129 insertions(+) create mode 100644 Documentation/devicetree/bindings/auxdisplay/raspberryp= i,sensehat-display.yaml create mode 100644 Documentation/devicetree/bindings/input/raspberrypi,sen= sehat-joystick.yaml create mode 100644 Documentation/devicetree/bindings/mfd/raspberrypi,sense= hat.yaml diff --git a/Documentation/devicetree/bindings/auxdisplay/raspberrypi,sense= hat-display.yaml b/Documentation/devicetree/bindings/auxdisplay/raspberrypi= ,sensehat-display.yaml new file mode 100644 index 000000000000..5e41d6b7817d --- /dev/null +++ b/Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-dis= play.yaml @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/auxdisplay/raspberrypi,sensehat-display= .yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Raspberry Pi Sensehat Display + +maintainers: + - Charles Mirabile + - Mwesigwa Guma + - Joel Savitz + +description: + This device is part of the sensehat multi function device. + For more information see ../mfd/raspberrypi,sensehat.yaml. + + This device features a programmable 8x8 RGB LED matrix. + +properties: + compatible: + const: raspberrypi,sensehat-display + +required: + - compatible + +additionalProperties: false diff --git a/Documentation/devicetree/bindings/input/raspberrypi,sensehat-j= oystick.yaml b/Documentation/devicetree/bindings/input/raspberrypi,sensehat= -joystick.yaml new file mode 100644 index 000000000000..c97cd1d8eac6 --- /dev/null +++ b/Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick= .yaml @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/raspberrypi,sensehat-joystick.yam= l# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Raspberry Pi Sensehat Joystick + +maintainers: + - Charles Mirabile + - Mwesigwa Guma + - Joel Savitz + +description: + This device is part of the sensehat multi function device. + For more information see ../mfd/raspberrypi,sensehat.yaml. + + This device features a five button joystick (up, down,left, + right, click) + +properties: + compatible: + const: raspberrypi,sensehat-joystick + + interrupts: + items: + - description: pin number for joystick interrupt + +required: + - compatible + - interrupts + +additionalProperties: false diff --git a/Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yam= l b/Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml new file mode 100644 index 000000000000..2484ec91b430 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml @@ -0,0 +1,69 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/raspberrypi,sensehat.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Raspberry Pi Sensehat + +maintainers: + - Charles Mirabile + - Mwesigwa Guma + - Joel Savitz + +description: + The Raspberry Pi Sensehat is an addon board originally developed + for the Raspberry Pi that has a joystick and an 8x8 RGB LED display + as well as several environmental sensors. It connects via i2c and + a gpio for irq. + +properties: + compatible: + const: raspberrypi,sensehat + + reg: + items: + - description: i2c device address + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + "joystick": + $ref: ../input/raspberrypi,sensehat-joystick.yaml + + "display": + $ref: ../auxdisplay/raspberrypi,sensehat-display.yaml + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + - joystick + - display + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + sensehat@46 { + #address-cells =3D <1>; + #size-cells =3D <0>; + compatible =3D "raspberrypi,sensehat"; + reg =3D <0x46>; + display { + compatible =3D "raspberrypi,sensehat-display"; + }; + joystick { + compatible =3D "raspberrypi,sensehat-joystick"; + interrupts =3D <23 GPIO_ACTIVE_HIGH>; + }; + }; + }; --=20 2.31.1 From nobody Tue Jun 23 14:07:34 2026 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 A782CC433F5 for ; Thu, 3 Mar 2022 17:40:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231791AbiCCRlg (ORCPT ); Thu, 3 Mar 2022 12:41:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235465AbiCCRlb (ORCPT ); Thu, 3 Mar 2022 12:41:31 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2DB6B1A1C78 for ; Thu, 3 Mar 2022 09:40:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646329239; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4Vjpagl0DUzF5LtErGQODiF3wuLWRJcPppibm+8nlG0=; b=CworP0t3pBHTmoJogu4pVxbLIncCiA3VvMcmpZmJ4BQF9d0muos64ZwTC/4atPjkiKZOg0 22oBLAayrTIcN00y4bD+wEgRMY5MpPEAlgkf4zgVuoovgDIH5eaEd3x3tpoOd2e2WCBWEn gcwJF2hgHgRNHV9P4Xv8LAUIv3UdRUE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-574-y-y7YLpIObe81_S-Tqzrbg-1; Thu, 03 Mar 2022 12:40:33 -0500 X-MC-Unique: y-y7YLpIObe81_S-Tqzrbg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9500E1091DA1; Thu, 3 Mar 2022 17:40:32 +0000 (UTC) Received: from cmirabil.remote.csb (unknown [10.22.9.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id 86E91804EA; Thu, 3 Mar 2022 17:40:14 +0000 (UTC) From: Charles Mirabile To: linux-kernel@vger.kernel.org Cc: Charles Mirabile , Serge Schneider , Stefan Wahren , Nicolas Saenz Julienne , Mattias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, fedora-rpi@googlegroups.com, Mwesigwa Guma , Joel Savitz Subject: [PATCH v7 5/6] MAINTAINERS: Add sensehat driver authors to MAINTAINERS Date: Thu, 3 Mar 2022 12:39:34 -0500 Message-Id: <20220303173935.100622-6-cmirabil@redhat.com> In-Reply-To: <20220303173935.100622-1-cmirabil@redhat.com> References: <20220303173935.100622-1-cmirabil@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This patch adds the driver authors to MAINAINERS. Co-developed-by: Mwesigwa Guma Signed-off-by: Mwesigwa Guma Co-developed-by: Joel Savitz Signed-off-by: Joel Savitz Signed-off-by: Charles Mirabile --- MAINTAINERS | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 4383949ff654..d6cb046ff751 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17417,6 +17417,17 @@ F: Documentation/ABI/testing/sysfs-bus-iio-chemica= l-sunrise-co2 F: Documentation/devicetree/bindings/iio/chemical/senseair,sunrise.yaml F: drivers/iio/chemical/sunrise_co2.c =20 +SENSEHAT DRIVER +M: Charles Mirabile +M: Mwesigwa Guma +M: Joel Savitz +S: Maintained +F: Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-displ= ay.yaml +F: Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick.y= aml +F: Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml +F: drivers/auxdisplay/sensehat-display.c +F: drivers/input/joystick/sensehat-joystick.c + SENSIRION SCD30 CARBON DIOXIDE SENSOR DRIVER M: Tomasz Duszynski S: Maintained --=20 2.31.1 From nobody Tue Jun 23 14:07:34 2026 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 037CAC433FE for ; Thu, 3 Mar 2022 17:40:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235194AbiCCRli (ORCPT ); Thu, 3 Mar 2022 12:41:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235456AbiCCRlb (ORCPT ); Thu, 3 Mar 2022 12:41:31 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2DC6C1A1C7B for ; Thu, 3 Mar 2022 09:40:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646329239; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=75fiNtP6TryBTCoq0L/i/NBN7hNVOksPnCdMHr7ZliA=; b=dQejRnglxA2Q1TYu31sMo4wV6Z40MdmCP7dUbw0n+lH+fFQHENYTnGR9MNo1mgmZB1Ox5r fpbP75wjlvQAJ9m6Ddebx+m/ArAUBut2+4O3mD5kijp0+f41VZk7p5s1aCIpjW5R1dGe2R mAd/iPmEWjq6+G38MWet3I0wCaxzgNY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-355-nrzwoSsEPMSvrs6vDyll6g-1; Thu, 03 Mar 2022 12:40:36 -0500 X-MC-Unique: nrzwoSsEPMSvrs6vDyll6g-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 968F81091DA3; Thu, 3 Mar 2022 17:40:34 +0000 (UTC) Received: from cmirabil.remote.csb (unknown [10.22.9.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6BFFE804F7; Thu, 3 Mar 2022 17:40:33 +0000 (UTC) From: Charles Mirabile To: linux-kernel@vger.kernel.org Cc: Charles Mirabile , Serge Schneider , Stefan Wahren , Nicolas Saenz Julienne , Mattias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, fedora-rpi@googlegroups.com, Mwesigwa Guma , Joel Savitz Subject: [PATCH v7 6/6] DO NOT MERGE: full sensehat device tree overlay for raspberry pi 4 Date: Thu, 3 Mar 2022 12:39:35 -0500 Message-Id: <20220303173935.100622-7-cmirabil@redhat.com> In-Reply-To: <20220303173935.100622-1-cmirabil@redhat.com> References: <20220303173935.100622-1-cmirabil@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This patch should not be merged - dtbs files are not stored in the kernel tree. We just provide this file so the code can be tested. This overlay is suitable for testing the driver, it can be compiled with dtc and put in the /boot/overlays/ folder then specified in config.txt by putting the lines: dtoverlay=3D #suppress loading of default overlay for HAT dtoverlay=3Dsensehat #load custom overlay at the beginning before any other lines in config.txt Co-developed-by: Mwesigwa Guma Signed-off-by: Mwesigwa Guma Co-developed-by: Joel Savitz Signed-off-by: Joel Savitz Signed-off-by: Charles Mirabile --- sensehat.dtbs | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 sensehat.dtbs diff --git a/sensehat.dtbs b/sensehat.dtbs new file mode 100644 index 000000000000..82d129c847fb --- /dev/null +++ b/sensehat.dtbs @@ -0,0 +1,54 @@ +/dts-v1/; +/plugin/; + +/ { + compatible =3D "brcm,bcm2835"; +}; + +&i2c1 { + #address-cells =3D <0x01>; + #size-cells =3D <0x00>; + status =3D "okay"; + + sensehat@46 { + #address-cells =3D <0x01>; + #size-cells =3D <0x00>; + compatible =3D "raspberrypi,sensehat"; + reg =3D <0x46>; + interrupt-parent =3D <&gpio>; + status =3D "okay"; + display { + compatible =3D "raspberrypi,sensehat-display"; + status =3D "okay"; + }; + joystick { + compatible =3D "raspberrypi,sensehat-joystick"; + interrupts =3D <23 1>; + status =3D "okay"; + }; + }; + + lsm9ds1-magn@1c { + compatible =3D "st,lsm9ds1-magn"; + reg =3D <0x1c>; + status =3D "okay"; + }; + + lsm9ds1-accel@6a { + compatible =3D "st,lsm9ds1-accel"; + reg =3D <0x6a>; + status =3D "okay"; + }; + + lps25h-press@5c { + compatible =3D "st,lps25h-press"; + reg =3D <0x5c>; + status =3D "okay"; + }; + + hts221-humid@5f { + compatible =3D "st,hts221-humid\0st,hts221"; + reg =3D <0x5f>; + status =3D "okay"; + }; +}; --=20 2.31.1