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From: tpiepho@gmail.com (Trent Piepho)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V2 07/12] spi/mxs: Remove bogus setting of ssp clk rate field
Date: Tue,  2 Apr 2013 05:19:50 -0700	[thread overview]
Message-ID: <1364905195-24286-7-git-send-email-tpiepho@gmail.com> (raw)
In-Reply-To: <1364905195-24286-1-git-send-email-tpiepho@gmail.com>

The ssp struct has a clock rate field, to provide the actual value, in Hz,
of the SSP output clock (the rate of SSP_SCK) after mxs_ssp_set_clk_rate()
is called.  It should be read-only, except for mxs_ssp_set_clk_rate().

For some reason the spi-mxs driver decides to write to this field on init,
and sets it to the value of the SSP input clock (clk_sspN, from the MXS
clocking block) in kHz.  It shouldn't be setting the value, and certainly
shouldn't be setting it with the wrong clock in the wrong units.

Signed-off-by: Trent Piepho <tpiepho@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/spi/spi-mxs.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 208de97..103c478 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -591,7 +591,6 @@ static int mxs_spi_probe(struct platform_device *pdev)
 
 	clk_prepare_enable(ssp->clk);
 	clk_set_rate(ssp->clk, clk_freq);
-	ssp->clk_rate = clk_get_rate(ssp->clk) / 1000;
 
 	stmp_reset_block(ssp->base);
 
-- 
1.7.10.4

  parent reply	other threads:[~2013-04-02 12:19 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-02 12:19 [PATCH V2 01/12] spi/mxs: Always set LOCK_CS Trent Piepho
2013-04-02 12:19 ` [PATCH V2 02/12] spi/mxs: Remove mxs_spi_enable and mxs_spi_disable Trent Piepho
2013-04-02 12:19 ` [PATCH V2 03/12] spi/mxs: Change flag arguments in txrx functions to bit flags Trent Piepho
2013-04-02 23:24   ` Marek Vasut
2013-04-02 12:19 ` [PATCH V2 04/12] spi/mxs: Fix extra CS pulses and read mode in multi-transfer messages Trent Piepho
2013-04-02 12:19 ` [PATCH V2 05/12] spi/mxs: Fix chip select control bits in DMA mode Trent Piepho
2013-04-02 23:29   ` Marek Vasut
2013-04-02 12:19 ` [PATCH V2 06/12] spi/mxs: Remove full duplex check, spi core already does it Trent Piepho
2013-04-02 12:19 ` Trent Piepho [this message]
2013-04-02 12:19 ` [PATCH V2 08/12] spi/mxs: Fix race in setup method Trent Piepho
2013-04-02 23:31   ` Marek Vasut
2013-04-03  2:12     ` Trent Piepho
2013-04-03  2:27       ` Marek Vasut
2013-04-03  6:08         ` Trent Piepho
2013-04-03  6:50           ` Marek Vasut
2013-04-03  9:32             ` Trent Piepho
2013-04-02 12:19 ` [PATCH V2 09/12] spi/mxs: Remove check of spi mode bits Trent Piepho
2013-04-02 12:19 ` [PATCH V2 10/12] spi/mxs: Clean up setup_transfer function Trent Piepho
2013-04-02 23:35   ` Marek Vasut
2013-04-02 12:19 ` [PATCH V2 11/12] spi/mxs: Don't set clock for each xfer Trent Piepho
2013-04-02 23:38   ` Marek Vasut
2013-04-02 12:19 ` [PATCH V2 12/12] spi/mxs: Use u32 instead of uint32_t Trent Piepho
2013-04-02 23:18 ` [PATCH V2 01/12] spi/mxs: Always set LOCK_CS Marek Vasut
2013-07-10 13:49   ` Fabio Estevam
2013-07-10 15:29     ` Lothar Waßmann
2013-04-03  1:41 ` Shawn Guo
2013-04-14 18:01 ` Marek Vasut

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