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[nrf fromlist] Spim custom frequencies downstream #3012

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[nrf fromlist] Spim custom frequencies downstream #3012

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[nrf fromlist] drivers: spi: nrfx_spim: Add support for non standard …
mif1-nordic Jul 10, 2025
4fab983
[nrf fromlist] tests: drivers: spi: Add test cases for non standard f…
mif1-nordic Jul 10, 2025
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7 changes: 5 additions & 2 deletions drivers/spi/spi_nrfx_spim.c
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Original file line number Diff line number Diff line change
Expand Up @@ -170,11 +170,14 @@ static inline void finalize_spi_transaction(const struct device *dev, bool deact

static inline uint32_t get_nrf_spim_frequency(uint32_t frequency)
{
if (NRF_SPIM_HAS_PRESCALER) {
return frequency;
}
/* Get the highest supported frequency not exceeding the requested one.
*/
if (frequency >= MHZ(32) && (NRF_SPIM_HAS_32_MHZ_FREQ || NRF_SPIM_HAS_PRESCALER)) {
if (frequency >= MHZ(32) && NRF_SPIM_HAS_32_MHZ_FREQ) {
return MHZ(32);
} else if (frequency >= MHZ(16) && (NRF_SPIM_HAS_16_MHZ_FREQ || NRF_SPIM_HAS_PRESCALER)) {
} else if (frequency >= MHZ(16) && NRF_SPIM_HAS_16_MHZ_FREQ) {
return MHZ(16);
} else if (frequency >= MHZ(8)) {
return MHZ(8);
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9 changes: 9 additions & 0 deletions tests/drivers/spi/spi_controller_peripheral/boards/1m333333hz.overlay
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@@ -0,0 +1,9 @@
/*
* Copyright (c) 2025 Nordic Semiconductor
*
* SPDX-License-Identifier: Apache-2.0
*/

&dut_spi_dt {
spi-max-frequency = <1333333>;
};
9 changes: 9 additions & 0 deletions tests/drivers/spi/spi_controller_peripheral/boards/2m666666hz.overlay
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
/*
* Copyright (c) 2025 Nordic Semiconductor
*
* SPDX-License-Identifier: Apache-2.0
*/

&dut_spi_dt {
spi-max-frequency = <2666666>;
};
16 changes: 16 additions & 0 deletions tests/drivers/spi/spi_controller_peripheral/testcase.yaml
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Expand Up @@ -45,6 +45,22 @@ tests:
integration_platforms:
- nrf52840dk/nrf52840

drivers.spi.spi_1M333333Hz:
extra_configs:
- CONFIG_TESTED_SPI_MODE=0
extra_args: EXTRA_DTC_OVERLAY_FILE="boards/1m333333hz.overlay"
integration_platforms:
- nrf54l15dk/nrf54l15/cpuapp
- nrf54h20dk/nrf54h20/cpuapp

drivers.spi.spi_2M666666Hz:
extra_configs:
- CONFIG_TESTED_SPI_MODE=0
extra_args: EXTRA_DTC_OVERLAY_FILE="boards/2m666666hz.overlay"
integration_platforms:
- nrf54l15dk/nrf54l15/cpuapp
- nrf54h20dk/nrf54h20/cpuapp

drivers.spi.spi_4MHz:
extra_configs:
- CONFIG_TESTED_SPI_MODE=2
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