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drivers: adc: Improve the default routine providing sampling intervals

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This part of common code for ADC drivers, the adc_context_enable_timer()
function, was still converting sampling interval values to milliseconds
(the only option available at the time this code has been created) when
setting up the kernel timer, consequently limiting the maximum sampling
frequency to 1000 samples per second. This patch switches the routine
to specifying the interval in microseconds, to remove this limitation.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
This commit is contained in:
Andrzej Głąbek 2020-10-01 14:04:00 +02:00 • committed by Maureen Helm
commit 26e6e7ad1f
1 changed files with 1 additions and 4 deletions
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5
drivers/adc/adc_context.h
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@ -92,10 +92,7 @@ static inline void adc_context_request_next_sampling(struct adc_context *ctx)
#ifdef ADC_CONTEXT_USES_KERNEL_TIMER
static inline void adc_context_enable_timer(struct adc_context *ctx)
{
uint32_t interval_us = ctx->options.interval_us;
uint32_t interval_ms = ceiling_fraction(interval_us, 1000UL);
k_timer_start(&ctx->timer, K_NO_WAIT, K_MSEC(interval_ms));
k_timer_start(&ctx->timer, K_NO_WAIT, K_USEC(ctx->options.interval_us));
}
static inline void adc_context_disable_timer(struct adc_context *ctx)