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spi: rzv2h-rspi: split out PIO transfer

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In preparation for implementing DMA support, split out the PIO transfer
code into its own function.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Link: https://patch.msgid.link/20251201134229.600817-10-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cosmin Tanislav 2025-12-01 15:42:25 +02:00 committed by Mark Brown
parent d49eea07de
commit 1e5e10df8b
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GPG Key ID: 24D68B725D5487D0
1 changed files with 20 additions and 7 deletions
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27
drivers/spi/spi-rzv2h-rspi.c
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@ -219,17 +219,14 @@ static int rzv2h_rspi_receive(struct rzv2h_rspi_priv *rspi, void *rxbuf,
return 0;
}
static int rzv2h_rspi_transfer_one(struct spi_controller *controller,
static int rzv2h_rspi_transfer_pio(struct rzv2h_rspi_priv *rspi,
struct spi_device *spi,
struct spi_transfer *transfer)
struct spi_transfer *transfer,
unsigned int words_to_transfer)
{
struct rzv2h_rspi_priv *rspi = spi_controller_get_devdata(controller);
unsigned int words_to_transfer, i;
unsigned int i;
int ret = 0;
transfer->effective_speed_hz = rspi->freq;
words_to_transfer = transfer->len / rspi->bytes_per_word;
for (i = 0; i < words_to_transfer; i++) {
rzv2h_rspi_clear_all_irqs(rspi);
@ -240,6 +237,22 @@ static int rzv2h_rspi_transfer_one(struct spi_controller *controller,
break;
}
return ret;
}
static int rzv2h_rspi_transfer_one(struct spi_controller *controller,
struct spi_device *spi,
struct spi_transfer *transfer)
{
struct rzv2h_rspi_priv *rspi = spi_controller_get_devdata(controller);
unsigned int words_to_transfer;
int ret;
transfer->effective_speed_hz = rspi->freq;
words_to_transfer = transfer->len / rspi->bytes_per_word;
ret = rzv2h_rspi_transfer_pio(rspi, spi, transfer, words_to_transfer);
rzv2h_rspi_clear_all_irqs(rspi);
return ret;