b158935f70
The loops which SPI controller drivers use to process the list of transfers in a spi_message are typically very similar and have some error prone areas such as the handling of /CS. Help simplify drivers by factoring this code out into the core - if drivers provide a transfer_one() function instead of a transfer_one_message() function the core will handle processing at the message level. /CS can be controlled by either setting cs_gpio or providing a set_cs function. If this is not possible for hardware reasons then both can be omitted and the driver should continue to implement manual /CS handling. This is a first step in refactoring and it is expected that there will be further enhancements, for example factoring out of the mapping of transfers for DMA and the initiation and completion of interrupt driven transfers. Signed-off-by: Mark Brown <broonie@linaro.org>
156 lines
3.2 KiB
C
156 lines
3.2 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM spi
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#if !defined(_TRACE_SPI_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_SPI_H
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#include <linux/ktime.h>
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(spi_master,
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TP_PROTO(struct spi_master *master),
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TP_ARGS(master),
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TP_STRUCT__entry(
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__field( int, bus_num )
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),
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TP_fast_assign(
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__entry->bus_num = master->bus_num;
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),
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TP_printk("spi%d", (int)__entry->bus_num)
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);
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DEFINE_EVENT(spi_master, spi_master_idle,
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TP_PROTO(struct spi_master *master),
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TP_ARGS(master)
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);
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DEFINE_EVENT(spi_master, spi_master_busy,
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TP_PROTO(struct spi_master *master),
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TP_ARGS(master)
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);
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DECLARE_EVENT_CLASS(spi_message,
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TP_PROTO(struct spi_message *msg),
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TP_ARGS(msg),
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TP_STRUCT__entry(
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__field( int, bus_num )
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__field( int, chip_select )
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__field( struct spi_message *, msg )
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),
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TP_fast_assign(
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__entry->bus_num = msg->spi->master->bus_num;
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__entry->chip_select = msg->spi->chip_select;
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__entry->msg = msg;
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),
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TP_printk("spi%d.%d %p", (int)__entry->bus_num,
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(int)__entry->chip_select,
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(struct spi_message *)__entry->msg)
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);
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DEFINE_EVENT(spi_message, spi_message_submit,
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TP_PROTO(struct spi_message *msg),
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TP_ARGS(msg)
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);
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DEFINE_EVENT(spi_message, spi_message_start,
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TP_PROTO(struct spi_message *msg),
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TP_ARGS(msg)
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);
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TRACE_EVENT(spi_message_done,
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TP_PROTO(struct spi_message *msg),
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TP_ARGS(msg),
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TP_STRUCT__entry(
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__field( int, bus_num )
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__field( int, chip_select )
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__field( struct spi_message *, msg )
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__field( unsigned, frame )
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__field( unsigned, actual )
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),
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TP_fast_assign(
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__entry->bus_num = msg->spi->master->bus_num;
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__entry->chip_select = msg->spi->chip_select;
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__entry->msg = msg;
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__entry->frame = msg->frame_length;
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__entry->actual = msg->actual_length;
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),
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TP_printk("spi%d.%d %p len=%u/%u", (int)__entry->bus_num,
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(int)__entry->chip_select,
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(struct spi_message *)__entry->msg,
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(unsigned)__entry->actual, (unsigned)__entry->frame)
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);
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DECLARE_EVENT_CLASS(spi_transfer,
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TP_PROTO(struct spi_message *msg, struct spi_transfer *xfer),
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TP_ARGS(msg, xfer),
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TP_STRUCT__entry(
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__field( int, bus_num )
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__field( int, chip_select )
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__field( struct spi_transfer *, xfer )
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__field( int, len )
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),
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TP_fast_assign(
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__entry->bus_num = msg->spi->master->bus_num;
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__entry->chip_select = msg->spi->chip_select;
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__entry->xfer = xfer;
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__entry->len = xfer->len;
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),
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TP_printk("spi%d.%d %p len=%d", (int)__entry->bus_num,
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(int)__entry->chip_select,
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(struct spi_message *)__entry->xfer,
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(int)__entry->len)
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);
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DEFINE_EVENT(spi_transfer, spi_transfer_start,
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TP_PROTO(struct spi_message *msg, struct spi_transfer *xfer),
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TP_ARGS(msg, xfer)
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);
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DEFINE_EVENT(spi_transfer, spi_transfer_stop,
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TP_PROTO(struct spi_message *msg, struct spi_transfer *xfer),
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TP_ARGS(msg, xfer)
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);
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#endif /* _TRACE_POWER_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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