From: Anton Tikhomirov <av.tikhomirov@samsung.com>
To: 'Tomasz Figa' <tomasz.figa@gmail.com>,
'Vivek Gautam' <gautam.vivek@samsung.com>,
linux-usb@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
gregkh@linuxfoundation.org, balbi@ti.com, kgene.kim@samsung.com,
mark.rutland@arm.com, pawel.moll@arm.com, robh+dt@kernel.org,
kishon@ti.com
Subject: RE: [PATCH v2 1/4] dwc3: exynos: Add support for SCLK present on Exynos7
Date: Tue, 14 Oct 2014 10:26:35 +0900 [thread overview]
Message-ID: <001801cfe74d$e4cb23d0$ae616b70$%tikhomirov@samsung.com> (raw)
In-Reply-To: <543C575A.1030105@gmail.com>
Hello,
> Hi Anton,
>
> On 13.10.2014 06:54, Anton Tikhomirov wrote:
> > Hi Vivek,
> >
> >> Exynos7 also has a separate special gate clock going to the IP
> >> apart from the usual AHB clock. So add support for the same.
> >
> > As we discussed before, Exynos7 SoCs have 7 clocks to be controlled
> > by the driver. Adding only sclk is not enough.
> >
>
> I'm quite interested in this discussion. Has it happened on mailing
> lists?
No, we used company messenger for the discussion.
>
> In general, previous SoCs also gave the possibility of controlling all
> the bus clocks separately, in addition to bulk gates, but there was no
correct
> real advantage in using those, while burdening the clock tree with
> numerous clocks. Isn't Exynos7 similar in this aspect?
Exynos7 doesn't have "Gating all clocks for USBDRD30" bit. The clocks
should be controlled separately.
>
> Best regards,
> Tomasz
> --
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next prev parent reply other threads:[~2014-10-14 1:26 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-07 10:19 [PATCH v2 0/4] usb: dwc3/phy-exynos5-usbdrd: Extend support to Exynos7 Vivek Gautam
2014-10-07 10:19 ` [PATCH v2 1/4] dwc3: exynos: Add support for SCLK present on Exynos7 Vivek Gautam
2014-10-07 14:11 ` Felipe Balbi
2014-10-08 3:01 ` Vivek Gautam
2014-10-13 4:54 ` Anton Tikhomirov
2014-10-13 22:44 ` Felipe Balbi
2014-10-14 4:55 ` Vivek Gautam
2014-10-15 14:50 ` Felipe Balbi
[not found] ` <00f101cfe6a1$d772c5a0$865850e0$%tikhomirov-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-10-13 22:51 ` Tomasz Figa
2014-10-14 1:26 ` Anton Tikhomirov [this message]
2014-10-14 4:53 ` Vivek Gautam
[not found] ` <1412677176-3850-1-git-send-email-gautam.vivek-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-10-07 10:19 ` [PATCH v2 2/4] phy: exynos5-usbdrd: Add pipe-clk and utmi-clk support Vivek Gautam
2014-10-13 5:02 ` Anton Tikhomirov
2014-10-22 11:53 ` Kishon Vijay Abraham I
2014-10-07 10:19 ` [PATCH v2 3/4] phy: exynos5-usbdrd: Add facility for VBUS-BOOST-5V supply Vivek Gautam
2014-10-13 5:06 ` Anton Tikhomirov
2014-10-13 5:11 ` Vivek Gautam
2014-10-07 10:19 ` [PATCH v2 4/4] phy: exynos7-usbdrd: Update dependency for ARCH_EXYNOS Vivek Gautam
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