linux-kernel - Re: [PATCH v2 12/14] mmc: mmci: add support for fbclk to latch data and cmd.

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Date:	Fri, 23 May 2014 11:12:29 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	Russell King <linux@....linux.org.uk>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Chris Ball <chris@...ntf.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2 12/14] mmc: mmci: add support for fbclk to latch data
 and cmd.

On Thu, May 15, 2014 at 11:37 AM,  <srinivas.kandagatla@...aro.org> wrote:

> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>
> This patch adds support to fbclk that is used to latch data and
> cmd on some controllers like SD Card controller in Qcom SOC.
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

(...)

Isn't this overkill?

@@ -189,6 +192,7 @@ static struct variant_data variant_qcom = {
         .clkreg                 = MCI_CLK_ENABLE,
-        .clkreg_enable          = MCI_QCOM_CLK_FLOWENA,
+       .clkreg_enable          = MCI_QCOM_CLK_FLOWENA |
MCI_QCOM_CLK_FEEDBACK_CLK,
         .clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8,

Isn't this achieveing exactly the same thing without the extra fields?
You unconditionally do it at every enable anyway, don't you?

Yours,
Linus Walleij
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