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https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-14 13:05:49 +00:00
db611e6781
Add support for requesting an inverted PWM pulse (active-low) when setting up the period and pulse width of a PWM pin. This is useful when driving external, active-low circuitry (e.g. an LED) with a PWM signal. All in-tree PWM drivers is updated to match the new API signature, but no driver support for inverted PWM signals is added yet. All in-tree PWM consumers are updated to pass a flags value of 0 (0 meaning default, which is normal PWM polarity). Fixes #21384. Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
29 lines
834 B
C
29 lines
834 B
C
/*
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* Copyright (c) 2017 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <syscall_handler.h>
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#include <drivers/pwm.h>
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static inline int z_vrfy_pwm_pin_set_cycles(struct device *dev, u32_t pwm,
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u32_t period, u32_t pulse,
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pwm_flags_t flags)
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{
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Z_OOPS(Z_SYSCALL_DRIVER_PWM(dev, pin_set));
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return z_impl_pwm_pin_set_cycles((struct device *)dev, pwm, period,
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pulse, flags);
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}
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#include <syscalls/pwm_pin_set_cycles_mrsh.c>
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static inline int z_vrfy_pwm_get_cycles_per_sec(struct device *dev, u32_t pwm,
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u64_t *cycles)
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{
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Z_OOPS(Z_SYSCALL_DRIVER_PWM(dev, get_cycles_per_sec));
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Z_OOPS(Z_SYSCALL_MEMORY_WRITE(cycles, sizeof(u64_t)));
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return z_impl_pwm_get_cycles_per_sec((struct device *)dev,
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pwm, (u64_t *)cycles);
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}
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#include <syscalls/pwm_get_cycles_per_sec_mrsh.c>
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