From: "Alexander Shiyan" <shc_work@mail.ru>
To: barebox@lists.infradead.org
Subject: Re[2]: [PATCH 6/7] i.MX51: Add PAD_CTL_HYS bit to SD_CLK pads
Date: Thu, 12 Apr 2012 23:44:22 +0400 [thread overview]
Message-ID: <E1SIQ3S-0004ym-G5@merlin.infradead.org> (raw)
In-Reply-To: <20120412210526.326ac54a@eb-e6520>
Hello.
> Alexander Shiyan <shc_work@mail.ru> a écrit :
> > -#define MX51_PAD_SD1_CLK__SD1_CLK IOMUX_PAD(0x7A0, 0x398, 0x10, 0x0, 0, MX51_SDHCI_PAD_CTRL)
> > +#define MX51_PAD_SD1_CLK__SD1_CLK IOMUX_PAD(0x7A0, 0x398, 0x10, 0x0, 0, MX51_SDHCI_PAD_CTRL | PAD_CTL_HYS)
> why is this change needed ?
Of course, the hysteresis is used to input pins, but I noticed that the shape of the output signal CLK is improved by setting
this bit. Especially noticeable at high speed. Perhaps this is especially the layout.
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next prev parent reply other threads:[~2012-04-12 19:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-12 16:20 [PATCH 1/7] i.MX51: Allow to pass cpu clock to lowlevel init Alexander Shiyan
2012-04-12 16:20 ` [PATCH 2/7] i.MX53: Move specific i.MX53 silicon definitions to imx53-regs.h Alexander Shiyan
2012-04-12 19:04 ` Eric Bénard
2012-04-12 19:47 ` Sascha Hauer
2012-04-12 19:49 ` Re[2]: " Alexander Shiyan
2012-04-12 16:20 ` [PATCH 3/7] i.MX51: Add iomux definitions for SDHC3 Alexander Shiyan
2012-04-12 20:11 ` Sascha Hauer
2012-04-12 16:20 ` [PATCH 4/7] i.MX51: Add iomux definitions for GPIO3.0 Alexander Shiyan
2012-04-12 16:20 ` [PATCH 5/7] i.MX51: Add iomux definitions for I2C2 Alexander Shiyan
2012-04-12 16:20 ` [PATCH 6/7] i.MX51: Add PAD_CTL_HYS bit to SD_CLK pads Alexander Shiyan
2012-04-12 19:05 ` Eric Bénard
2012-04-12 19:44 ` Alexander Shiyan [this message]
2012-04-12 16:20 ` [PATCH 7/7] i.MX51: Add support for SDHC3 Alexander Shiyan
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