From: Jarkko Nikula <jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Nicolas Ferre
<nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>,
Daniel Mack <daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>,
Haojian Zhuang
<haojian.zhuang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Robert Jarzmik <robert.jarzmik-GANU6spQydw@public.gmane.org>,
Kukjin Kim <kgene-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Krzysztof Kozlowski
<k.kozlowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Jarkko Nikula
<jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Subject: [PATCH 05/16] spi: spi-bfin5xx: Calculate transfer speed unconditionally
Date: Tue, 15 Sep 2015 16:26:17 +0300 [thread overview]
Message-ID: <1442323588-29642-5-git-send-email-jarkko.nikula@linux.intel.com> (raw)
In-Reply-To: <1442323588-29642-1-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
SPI core validates the transfer speed and defaults to spi->max_speed_hz in
case the transfer speed is not set so code here won't use the
chip->baud value (which is derived from spi->max_speed_hz).
Please note driver uses chip->baud at the beginning of message transmission
by calling the bfin_spi_restore_state() but then programs per transfer
speed in bfin_spi_pump_transfers(). I'm not familiar with the HW so I don't
know would it be possible to remove chip->baud completely by either using
constant value in bfin_spi_restore_state() or by removing the baud register
write there.
Signed-off-by: Jarkko Nikula <jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
drivers/spi/spi-bfin5xx.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
index a3d65b4f4944..1e91325bf39c 100644
--- a/drivers/spi/spi-bfin5xx.c
+++ b/drivers/spi/spi-bfin5xx.c
@@ -661,11 +661,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
message->state = RUNNING_STATE;
dma_config = 0;
- /* Speed setup (surely valid because already checked) */
- if (transfer->speed_hz)
- bfin_write(&drv_data->regs->baud, hz_to_spi_baud(transfer->speed_hz));
- else
- bfin_write(&drv_data->regs->baud, chip->baud);
+ bfin_write(&drv_data->regs->baud, hz_to_spi_baud(transfer->speed_hz));
bfin_write(&drv_data->regs->stat, BIT_STAT_CLR);
bfin_spi_cs_active(drv_data, chip);
--
2.5.1
--
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next prev parent reply other threads:[~2015-09-15 13:26 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-15 13:26 [PATCH 01/16] spi: txx9: Use transfer speed unconditionally Jarkko Nikula
[not found] ` <1442323588-29642-1-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-15 13:26 ` [PATCH 02/16] spi: s3c64xx: " Jarkko Nikula
[not found] ` <1442323588-29642-2-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-16 20:02 ` Applied "spi: s3c64xx: Use transfer speed unconditionally" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 03/16] spi: octeon: Use transfer speed unconditionally Jarkko Nikula
[not found] ` <1442323588-29642-3-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-16 20:02 ` Applied "spi: octeon: Use transfer speed unconditionally" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 04/16] spi: bfin-sport: Calculate transfer speed unconditionally Jarkko Nikula
[not found] ` <1442323588-29642-4-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-16 20:02 ` Applied "spi: bfin-sport: Calculate transfer speed unconditionally" to the spi tree Mark Brown
2015-09-15 13:26 ` Jarkko Nikula [this message]
[not found] ` <1442323588-29642-5-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-16 20:02 ` Applied "spi: spi-bfin5xx: " Mark Brown
2015-09-15 13:26 ` [PATCH 06/16] spi: au1550: Simplify au1550_spi_setupxfer() Jarkko Nikula
[not found] ` <1442323588-29642-6-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-16 20:02 ` Applied "spi: au1550: Simplify au1550_spi_setupxfer()" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 07/16] spi: mpc512x: Call mpc512x_psc_spi_transfer_setup() unconditionally Jarkko Nikula
[not found] ` <1442323588-29642-7-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: mpc512x: Call mpc512x_psc_spi_transfer_setup() unconditionally" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 08/16] spi: omap-uwire: Remove needless bits_per_word and speed_hz tests Jarkko Nikula
[not found] ` <1442323588-29642-8-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: omap-uwire: Remove needless bits_per_word and speed_hz tests" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 09/16] spi: omap-100k: Rely on validations done by spi core Jarkko Nikula
[not found] ` <1442323588-29642-9-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: omap-100k: Rely on validations done by spi core" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 10/16] spi: atmel: Remove needless bits_per_word and speed_hz tests Jarkko Nikula
[not found] ` <1442323588-29642-10-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-15 13:54 ` Nicolas Ferre
2015-09-25 18:09 ` Applied "spi: atmel: Remove needless bits_per_word and speed_hz tests" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 11/16] spi: dw: Remove needless if statements Jarkko Nikula
[not found] ` <1442323588-29642-11-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: dw: Remove needless if statements" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 12/16] spi: dw: Remove test for non-zero spi->max_speed_hz Jarkko Nikula
[not found] ` <1442323588-29642-12-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: dw: Remove test for non-zero spi->max_speed_hz" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 13/16] spi: spi-fsl-dspi: Remove duplicated register write Jarkko Nikula
[not found] ` <1442323588-29642-13-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: spi-fsl-dspi: Remove duplicated register write" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 14/16] spi: pxa2xx: Remove two variables from struct chip_data Jarkko Nikula
[not found] ` <1442323588-29642-14-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: pxa2xx: Remove two variables from struct chip_data" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 15/16] spi: pxa2xx: Remove if statement that is always true in pump_transfers() Jarkko Nikula
[not found] ` <1442323588-29642-15-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: pxa2xx: Remove if statement that is always true in pump_transfers()" to the spi tree Mark Brown
2015-09-15 13:26 ` [PATCH 16/16] spi: pxa2xx: Remove cr0 variable from struct chip_data Jarkko Nikula
[not found] ` <1442323588-29642-16-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-09-17 17:37 ` Applied "spi: pxa2xx: Remove cr0 variable from struct chip_data" to the spi tree Mark Brown
2015-09-16 19:52 ` [PATCH 01/16] spi: txx9: Use transfer speed unconditionally Mark Brown
2015-09-16 20:02 ` Applied "spi: txx9: Use transfer speed unconditionally" to the spi tree Mark Brown
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