From 6c613f68aabf33385c01e949204ac5ed30887161 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Thu, 26 Sep 2019 13:51:35 +0300 Subject: spi: core,atmel: convert `word_delay_usecs` -> `word_delay` for spi_device This change does a conversion from the `word_delay_usecs` -> `word_delay` for the `spi_device` struct. This allows users to specify inter-word delays in other unit types (nano-seconds or clock cycles), depending on how users want. The Atmel SPI driver is the only current user of the `word_delay_usecs` field (from the `spi_device` struct). So, it needed a slight conversion to use the `word_delay` as an `spi_delay` struct. In SPI core, the only required mechanism is to update the `word_delay` information per `spi_transfer`. This requires a bit more logic than before, because it needs that both delays be converted to a common unit (nano-seconds) for comparison. Signed-off-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20190926105147.7839-8-alexandru.ardelean@analog.com Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'include') diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 6cb67ad53ffa..ebeb272aeb0f 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -139,7 +139,7 @@ extern int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer); * the spi_master. * @cs_gpiod: gpio descriptor of the chipselect line (optional, NULL when * not using a GPIO line) - * @word_delay_usecs: microsecond delay to be inserted between consecutive + * @word_delay: delay to be inserted between consecutive * words of a transfer * * @statistics: statistics for the spi_device @@ -189,7 +189,7 @@ struct spi_device { const char *driver_override; int cs_gpio; /* LEGACY: chip select gpio */ struct gpio_desc *cs_gpiod; /* chip select gpio desc */ - uint8_t word_delay_usecs; /* inter-word delay */ + struct spi_delay word_delay; /* inter-word delay */ /* the statistics */ struct spi_statistics statistics; @@ -781,8 +781,6 @@ extern void spi_res_release(struct spi_controller *ctlr, * @delay_usecs: microseconds to delay after this transfer before * (optionally) changing the chipselect status, then starting * the next transfer or completing this @spi_message. - * @word_delay_usecs: microseconds to inter word delay after each word size - * (set by bits_per_word) transmission. * @word_delay: inter word delay to be introduced after each word size * (set by bits_per_word) transmission. * @effective_speed_hz: the effective SCK-speed that was used to @@ -897,7 +895,6 @@ struct spi_transfer { #define SPI_NBITS_DUAL 0x02 /* 2bits transfer */ #define SPI_NBITS_QUAD 0x04 /* 4bits transfer */ u8 bits_per_word; - u8 word_delay_usecs; u16 delay_usecs; struct spi_delay cs_change_delay; struct spi_delay word_delay; -- cgit v1.2.3