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Subject[PATCH v2] spi:spi_bfin5xx: SPI SSEL deasserted too early in soft irq mode.
Date
From: Sonic Zhang <sonic.zhang@analog.com>

Poll the FIFO till it is empty before deassert SSEL in pump_transfers in
soft irq mode. No polling is necessary in interrupt mode and error handling.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
---
drivers/spi/spi-bfin5xx.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
index b8d25f2..7e03e7d 100644
--- a/drivers/spi/spi-bfin5xx.c
+++ b/drivers/spi/spi-bfin5xx.c
@@ -587,6 +587,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
if (message->state == DONE_STATE) {
dev_dbg(&drv_data->pdev->dev, "transfer: all done!\n");
message->status = 0;
+ bfin_spi_flush(drv_data);
bfin_spi_giveback(drv_data);
return;
}
@@ -870,8 +871,10 @@ static void bfin_spi_pump_transfers(unsigned long data)
message->actual_length += drv_data->len_in_bytes;
/* Move to next transfer of this msg */
message->state = bfin_spi_next_transfer(drv_data);
- if (drv_data->cs_change)
+ if (drv_data->cs_change) {
+ bfin_spi_flush(drv_data);
bfin_spi_cs_deactive(drv_data, chip);
+ }
}

/* Schedule next transfer tasklet */
--
1.7.0.4



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