* [PATCH v7 2/6] drivers/input/joystick: sensehat: Raspberry Pi Sense HAT joystick driver
[not found] <20220303173935.100622-1-cmirabil@redhat.com>
@ 2022-03-03 17:39 ` Charles Mirabile
2022-03-03 17:39 ` [PATCH v7 4/6] dt-bindings: mfd: sensehat: Add Raspberry Pi Sense HAT schema Charles Mirabile
1 sibling, 0 replies; 3+ messages in thread
From: Charles Mirabile @ 2022-03-03 17:39 UTC (permalink / raw)
To: linux-kernel
Cc: Charles Mirabile, Serge Schneider, Stefan Wahren,
Nicolas Saenz Julienne, Mattias Brugger, linux-rpi-kernel,
linux-arm-kernel, fedora-rpi, Dmitry Torokhov, linux-input,
Daniel Bauman, Mwesigwa Guma, Joel Savitz
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 <dbauman@redhat.com>
Signed-off-by: Daniel Bauman <dbauman@redhat.com>
Co-developed-by: Mwesigwa Guma <mguma@redhat.com>
Signed-off-by: Mwesigwa Guma <mguma@redhat.com>
Co-developed-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Charles Mirabile <cmirabil@redhat.com>
---
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.
+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/Makefile
index 5174b8aba2dd..39c8b5c6e5ae 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_JOYSTICK_N64) += n64joy.o
obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o
obj-$(CONFIG_JOYSTICK_PXRC) += pxrc.o
obj-$(CONFIG_JOYSTICK_QWIIC) += qwiic-joystick.o
+obj-$(CONFIG_JOYSTICK_SENSEHAT) += sensehat-joystick.o
obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o
obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o
obj-$(CONFIG_JOYSTICK_SPACEORB) += spaceorb.o
diff --git a/drivers/input/joystick/sensehat-joystick.c b/drivers/input/joystick/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 Savitz
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/property.h>
+
+#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[] = {
+ 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 = cookie;
+ unsigned long curr_states, changes;
+
+ error = 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 = 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 = keys;
+ return IRQ_HANDLED;
+}
+
+static int sensehat_joystick_probe(struct platform_device *pdev)
+{
+ int error, i, irq;
+ struct sensehat_joystick *sensehat_joystick = devm_kzalloc(
+ &pdev->dev, sizeof(*sensehat_joystick), GFP_KERNEL);
+
+ sensehat_joystick->pdev = pdev;
+
+ sensehat_joystick->regmap = dev_get_regmap(sensehat_joystick->pdev->dev.parent, NULL);
+
+ sensehat_joystick->keys_dev = 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 = 0; i < ARRAY_SIZE(keymap); i++)
+ set_bit(keymap[i], sensehat_joystick->keys_dev->keybit);
+
+ sensehat_joystick->keys_dev->name = "Raspberry Pi Sense HAT Joystick";
+ sensehat_joystick->keys_dev->phys = "sensehat-joystick/input0";
+ sensehat_joystick->keys_dev->id.bustype = BUS_I2C;
+ sensehat_joystick->keys_dev->evbit[0] =
+ BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
+
+ error = input_register_device(sensehat_joystick->keys_dev);
+ if (error) {
+ dev_err(&pdev->dev, "Could not register input device.\n");
+ return error;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "Could not retrieve interrupt request.\n");
+ return irq;
+ }
+
+ error = 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[] = {
+ { .compatible = "raspberrypi,sensehat-joystick" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sensehat_joystick_device_id);
+
+static struct platform_driver sensehat_joystick_driver = {
+ .probe = sensehat_joystick_probe,
+ .driver = {
+ .name = "sensehat-joystick",
+ .of_match_table = sensehat_joystick_device_id,
+ },
+};
+
+module_platform_driver(sensehat_joystick_driver);
+
+MODULE_DESCRIPTION("Raspberry Pi Sense HAT joystick driver");
+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
+MODULE_LICENSE("GPL");
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH v7 4/6] dt-bindings: mfd: sensehat: Add Raspberry Pi Sense HAT schema
[not found] <20220303173935.100622-1-cmirabil@redhat.com>
2022-03-03 17:39 ` [PATCH v7 2/6] drivers/input/joystick: sensehat: Raspberry Pi Sense HAT joystick driver Charles Mirabile
@ 2022-03-03 17:39 ` Charles Mirabile
2022-03-07 22:52 ` Rob Herring
1 sibling, 1 reply; 3+ messages in thread
From: Charles Mirabile @ 2022-03-03 17:39 UTC (permalink / raw)
To: linux-kernel
Cc: Charles Mirabile, Serge Schneider, Stefan Wahren,
Nicolas Saenz Julienne, Mattias Brugger, linux-rpi-kernel,
linux-arm-kernel, fedora-rpi, Miguel Ojeda, Rob Herring,
Dmitry Torokhov, Lee Jones, devicetree, linux-input,
Mwesigwa Guma, Joel Savitz
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 <mguma@redhat.com>
Signed-off-by: Mwesigwa Guma <mguma@redhat.com>
Co-developed-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Charles Mirabile <cmirabil@redhat.com>
---
.../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/raspberrypi,sensehat-display.yaml
create mode 100644 Documentation/devicetree/bindings/input/raspberrypi,sensehat-joystick.yaml
create mode 100644 Documentation/devicetree/bindings/mfd/raspberrypi,sensehat.yaml
diff --git a/Documentation/devicetree/bindings/auxdisplay/raspberrypi,sensehat-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-display.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 <cmirabil@redhat.com>
+ - Mwesigwa Guma <mguma@redhat.com>
+ - Joel Savitz <jsavitz@redhat.com>
+
+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-joystick.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
+---
+$id: http://devicetree.org/schemas/input/raspberrypi,sensehat-joystick.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raspberry Pi Sensehat Joystick
+
+maintainers:
+ - Charles Mirabile <cmirabil@redhat.com>
+ - Mwesigwa Guma <mguma@redhat.com>
+ - Joel Savitz <jsavitz@redhat.com>
+
+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.yaml 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 <cmirabil@redhat.com>
+ - Mwesigwa Guma <mguma@redhat.com>
+ - Joel Savitz <jsavitz@redhat.com>
+
+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 <dt-bindings/gpio/gpio.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ sensehat@46 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "raspberrypi,sensehat";
+ reg = <0x46>;
+ display {
+ compatible = "raspberrypi,sensehat-display";
+ };
+ joystick {
+ compatible = "raspberrypi,sensehat-joystick";
+ interrupts = <23 GPIO_ACTIVE_HIGH>;
+ };
+ };
+ };
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread