From: knut.wohlrab@de•bosch.com (Knut Wohlrab)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] SPI: IMX5/6: Set inactive state of SPI clock (SCLK CTL) according to SPI clock polarity
Date: Mon, 27 Aug 2012 15:18:41 +0200 [thread overview]
Message-ID: <503B73B1.9010801@de.bosch.com> (raw)
For our SPI device we need a SPI clock with active low polarity and a a
high inactive state.
We add the setting of the inactive state ECSPIx_CONFIGREG:SCLK CTL
according to the clock polarity ECSPIx_CONFIGREG:SCLK POL:
Device tree _without_ "spi-cpol" = 0 = clock active high polarity =
inactive state low
Device tree with "spi-cpol" = 1 = clock active low polarity = inactive
state high
Are there real world examples for a need of an individual setting of
clock polarity/inactive state?
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reply other threads:[~2012-08-27 13:18 UTC|newest]
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