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bluetooth: hci: spi: configurable CS delay #93746

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bluetooth: hci: spi: configurable CS delay #93746

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3 changes: 2 additions & 1 deletion drivers/bluetooth/hci/spi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,8 @@ static K_KERNEL_STACK_DEFINE(spi_rx_stack, CONFIG_BT_DRV_RX_STACK_SIZE);
static struct k_thread spi_rx_thread_data;

static const struct spi_dt_spec bus = SPI_DT_SPEC_INST_GET(
0, SPI_OP_MODE_MASTER | SPI_TRANSFER_MSB | SPI_WORD_SET(8), 0);
0, SPI_OP_MODE_MASTER | SPI_TRANSFER_MSB | SPI_WORD_SET(8),
DT_INST_PROP(0, controller_cs_delay_us));

static struct spi_buf spi_tx_buf;
static struct spi_buf spi_rx_buf;
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7 changes: 7 additions & 0 deletions dts/bindings/bluetooth/zephyr,bt-hci-spi.yaml
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Expand Up @@ -24,6 +24,13 @@ properties:
Minimum duration to hold the reset-gpios pin low for.
If not specified no delay beyond the code path execution time is guaranteed.

controller-cs-delay-us:
type: int
default: 0
description:
Delay in microseconds to wait after asserting the CS line before starting the
transmission and before releasing the CS line after the transmission.

controller-data-delay-us:
type: int
default: 20
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