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Merge dc5a02f4e8 into 7c09eb217e

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hyx0329 2024-06-20 06:06:00 +00:00 • committed by GitHub
commit a6105dd011
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4 changed files with 77 additions and 8 deletions
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8
app/boards/arm/nrf52840_m2/nrf52840_m2.dts
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@ -16,7 +16,6 @@
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,console = &cdc_acm_uart;
zmk,battery = &vbatt;
};
leds {
@ -32,13 +31,6 @@
};
};
vbatt: vbatt {
compatible = "zmk,battery-voltage-divider";
io-channels = <&adc 0>;
output-ohms = <1000000>;
full-ohms = <(1000000 + 1000000)>;
};
};
&adc {

3
app/boards/shields/m60/CMakeLists.txt Normal file
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@ -0,0 +1,3 @@
zephyr_library()
zephyr_library_sources(pinmux.c)
zephyr_library_include_directories(${ZEPHYR_BASE}/drivers)

8
app/boards/shields/m60/m60.overlay
View file

@ -10,6 +10,7 @@
chosen {
zmk,kscan = &kscan0;
zmk,matrix-transform = &default_transform;
zmk,battery = &vbatt;
};
kscan0: kscan {
@ -56,5 +57,12 @@ RC(6,4) RC(6,3) RC(6,2) RC(6,1) RC(6,0) RC(5,7) RC(5,6) RC(5,5) RC(5,4) RC
RC(6,5) RC(6,6) RC(6,7) RC(7,0) RC(7,1) RC(7,2) RC(7,3) RC(7,4)
>;
};
vbatt: vbatt {
compatible = "zmk,battery-voltage-divider";
io-channels = <&adc 0>;
output-ohms = <1000000>;
full-ohms = <(1000000 + 1000000)>;
};
};

66
app/boards/shields/m60/pinmux.c Normal file
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@ -0,0 +1,66 @@
/*
* Copyright (c) 2024 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/sys/sys_io.h>
#include <zephyr/devicetree.h>
/* The PMU(BQ24075) enable pin(LOW active) on M60 is controlled by a NAND gate.
* Partial reverse engineering shows:
* P0.28 affects the NAND gate.
* The button affects P0.27 the NAND gate.
* P0.03 is detection pin for charging state(possibly attached to PMU LED pin).
*/
static const struct device *p0 = DEVICE_DT_GET(DT_NODELABEL(gpio0));
static inline void power_off(void) {
gpio_pin_set(p0, 28, 0); // turn off the PMU battery path
}
static inline bool is_charging(void) {
// 0: charging
return gpio_pin_get_raw(p0, 3) == 0;
}
static void button_pressed(const struct device *dev, struct gpio_callback *cb, uint32_t pins) {
// wait the button stable at 0 so the keyboard won't be powered up accidentally
k_sleep(K_SECONDS(1));
if (!is_charging()) {
power_off();
}
}
static int pinmux_nrf52840_m2_init(void) {
// back button
// NOTE: if used to power off the keyboard, make sure the action is done
// AFTER the button is released.
//
// To wake up the keyboard from sleep with this button, must use interrupt.
// To avoid the callback triggered after keyboard woke up(powering off the
// keyboard), must use GPIO_INT_EDGE_FALLING(trigger on button pressed).
gpio_pin_interrupt_configure(p0, 27, GPIO_INT_EDGE_FALLING);
// GPIO 0.28(LDO control) is already configured by bootloader,
// so configuring it here is just an ensurance.
gpio_pin_configure(p0, 28, GPIO_OUTPUT_ACTIVE | GPIO_PULL_UP | GPIO_OPEN_DRAIN);
// this is the pin for charging detection
gpio_pin_configure(p0, 3, GPIO_INPUT | GPIO_PULL_UP);
// setup the interrupt handler to poweroff the keyboard
static struct gpio_callback button_cb;
gpio_init_callback(&button_cb, button_pressed, BIT(27));
gpio_add_callback(p0, &button_cb);
return 0;
}
SYS_INIT(pinmux_nrf52840_m2_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);