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stm32: Add Hardware PWM support for STM32G0 processors (#5714)

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Uses existing common code for STM32. Adds a table for device-
specific PWM mappings. Adds support for enabling all TIM timer
devices. Makes it a runtime error to enable devices the code
doesn't know how to enable.

I have verified performance of the fan pins (PC6, PC7, PB15)
on the SKR Mini E3 V3.

Signed-off-by: Ben Jackson <ben@ben.com>
This commit is contained in:
Ben Jackson
2022-09-01 10:30:11 -07:00
committed by GitHub
parent 83ab6fbae5
commit b220b8bfaf
3 changed files with 66 additions and 4 deletions
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49
src/stm32/hard_pwm.c
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@@ -102,6 +102,53 @@ static const struct gpio_pwm_info pwm_regs[] = {
{TIM9, GPIO('E', 6), 2, GPIO_FUNCTION(3)},
{TIM10, GPIO('B', 8), 1, GPIO_FUNCTION(3)},
{TIM11, GPIO('B', 9), 1, GPIO_FUNCTION(3)}
#elif CONFIG_MACH_STM32G0
{TIM15, GPIO('A', 2), 1, GPIO_FUNCTION(5)},
{TIM15, GPIO('A', 3), 2, GPIO_FUNCTION(5)},
{TIM14, GPIO('A', 4), 1, GPIO_FUNCTION(4)},
{TIM3, GPIO('A', 6), 1, GPIO_FUNCTION(1)},
{TIM3, GPIO('A', 7), 2, GPIO_FUNCTION(1)},
{TIM1, GPIO('A', 8), 1, GPIO_FUNCTION(2)},
{TIM1, GPIO('A', 9), 2, GPIO_FUNCTION(2)},
{TIM1, GPIO('A', 10), 3, GPIO_FUNCTION(2)},
{TIM1, GPIO('A', 11), 4, GPIO_FUNCTION(2)},
{TIM3, GPIO('B', 0), 3, GPIO_FUNCTION(1)},
{TIM3, GPIO('B', 1), 4, GPIO_FUNCTION(1)},
{TIM1, GPIO('B', 3), 2, GPIO_FUNCTION(1)},
{TIM3, GPIO('B', 4), 1, GPIO_FUNCTION(1)},
{TIM3, GPIO('B', 5), 2, GPIO_FUNCTION(1)},
{TIM4, GPIO('B', 6), 1, GPIO_FUNCTION(9)},
{TIM4, GPIO('B', 7), 2, GPIO_FUNCTION(9)},
{TIM4, GPIO('B', 8), 3, GPIO_FUNCTION(9)},
{TIM4, GPIO('B', 9), 4, GPIO_FUNCTION(9)},
{TIM15, GPIO('B', 14), 1, GPIO_FUNCTION(5)},
{TIM15, GPIO('B', 15), 2, GPIO_FUNCTION(5)},
{TIM15, GPIO('C', 1), 1, GPIO_FUNCTION(2)},
{TIM15, GPIO('C', 2), 2, GPIO_FUNCTION(2)},
{TIM3, GPIO('C', 6), 1, GPIO_FUNCTION(1)},
{TIM3, GPIO('C', 7), 2, GPIO_FUNCTION(1)},
{TIM3, GPIO('C', 8), 3, GPIO_FUNCTION(1)},
{TIM3, GPIO('C', 9), 4, GPIO_FUNCTION(1)},
{TIM1, GPIO('C', 10), 3, GPIO_FUNCTION(2)},
{TIM1, GPIO('C', 11), 4, GPIO_FUNCTION(2)},
{TIM14, GPIO('C', 12), 1, GPIO_FUNCTION(2)},
{TIM16, GPIO('D', 0), 1, GPIO_FUNCTION(2)},
{TIM17, GPIO('D', 1), 1, GPIO_FUNCTION(2)},
{TIM4, GPIO('D', 12), 1, GPIO_FUNCTION(2)},
{TIM4, GPIO('D', 13), 2, GPIO_FUNCTION(2)},
{TIM4, GPIO('D', 14), 3, GPIO_FUNCTION(2)},
{TIM4, GPIO('D', 15), 4, GPIO_FUNCTION(2)},
{TIM3, GPIO('E', 3), 1, GPIO_FUNCTION(1)},
{TIM3, GPIO('E', 4), 2, GPIO_FUNCTION(1)},
{TIM3, GPIO('E', 5), 3, GPIO_FUNCTION(1)},
{TIM3, GPIO('E', 6), 4, GPIO_FUNCTION(1)},
{TIM1, GPIO('E', 9), 1, GPIO_FUNCTION(1)},
{TIM1, GPIO('E', 11), 2, GPIO_FUNCTION(1)},
{TIM1, GPIO('E', 13), 3, GPIO_FUNCTION(1)},
{TIM1, GPIO('E', 14), 4, GPIO_FUNCTION(1)},
{TIM14, GPIO('F', 0), 1, GPIO_FUNCTION(2)},
{TIM15, GPIO('F', 12), 1, GPIO_FUNCTION(0)},
{TIM15, GPIO('F', 13), 2, GPIO_FUNCTION(0)},
#elif CONFIG_MACH_STM32H7
{TIM2, GPIO('A', 0), 1, GPIO_FUNCTION(1)},
{TIM2, GPIO('A', 5), 1, GPIO_FUNCTION(1)},
@@ -234,7 +281,7 @@ gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint8_t val){
}
// Enable PWM output
p->timer->CR1 |= TIM_CR1_CEN;
#if CONFIG_MACH_STM32H7
#if CONFIG_MACH_STM32H7 || CONFIG_MACH_STM32G0
p->timer->BDTR |= TIM_BDTR_MOE;
#endif
return channel;