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From: b.brezillon@overkiz.com (boris brezillon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 06/17] clk: at91: add PMC pll clocks
Date: Thu, 28 Nov 2013 09:34:10 +0100	[thread overview]
Message-ID: <52970002.3020405@overkiz.com> (raw)
In-Reply-To: <20131127214843.16819.59481@quantum>

Hi Mike,

On 27/11/2013 22:48, Mike Turquette wrote:
> Quoting Boris BREZILLON (2013-11-12 13:57:19)
>> +static const struct clk_ops pll_ops = {
>> +       .prepare = clk_pll_prepare,
>> +       .is_prepared = clk_pll_is_ready,
>> +       .disable = clk_pll_disable,
>> +       .is_enabled = clk_pll_is_ready,
>> +       .recalc_rate = clk_pll_recalc_rate,
>> +       .round_rate = clk_pll_round_rate,
>> +       .set_rate = clk_pll_set_rate,
>> +};
> Hi Boris,
>
> It is a bit strange to see only a .prepare and .disable callback
> populated. What happens if a driver calls clk_disable and then
> clk_enable? You clock will still be disabled in hardware.

Oops, I haven't thought about that.
I did this because the clk_pll_disable does not sleep, but this is a big 
mistake :-(.

I'll fix this.

Thanks.

Best Regards,

Boris
> Regards,
> Mike

WARNING: multiple messages have this Message-ID (diff)
From: boris brezillon <b.brezillon@overkiz.com>
To: Mike Turquette <mturquette@linaro.org>,
	Rob Herring <rob.herring@calxeda.com>,
	Pawel Moll <pawel.moll@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Stephen Warren <swarren@wwwdotorg.org>,
	Ian Campbell <ijc+devicetree@hellion.org.uk>,
	Rob Landley <rob@landley.net>, Andrew Victor <linux@maxim.org.za>,
	Nicolas Ferre <nicolas.ferre@atmel.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
	Russell King <linux@arm.linux.org.uk>,
	Felipe Balbi <balbi@ti.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Grant Likely <grant.likely@linaro.org>,
	Ludovic Desroches <ludovic.desroches@atmel.com>,
	Josh Wu <josh.wu@atmel.com>,
	Richard Genoud <richard.genoud@gmail.com>
Cc: devicetree@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH v5 06/17] clk: at91: add PMC pll clocks
Date: Thu, 28 Nov 2013 09:34:10 +0100	[thread overview]
Message-ID: <52970002.3020405@overkiz.com> (raw)
In-Reply-To: <20131127214843.16819.59481@quantum>

Hi Mike,

On 27/11/2013 22:48, Mike Turquette wrote:
> Quoting Boris BREZILLON (2013-11-12 13:57:19)
>> +static const struct clk_ops pll_ops = {
>> +       .prepare = clk_pll_prepare,
>> +       .is_prepared = clk_pll_is_ready,
>> +       .disable = clk_pll_disable,
>> +       .is_enabled = clk_pll_is_ready,
>> +       .recalc_rate = clk_pll_recalc_rate,
>> +       .round_rate = clk_pll_round_rate,
>> +       .set_rate = clk_pll_set_rate,
>> +};
> Hi Boris,
>
> It is a bit strange to see only a .prepare and .disable callback
> populated. What happens if a driver calls clk_disable and then
> clk_enable? You clock will still be disabled in hardware.

Oops, I haven't thought about that.
I did this because the clk_pll_disable does not sleep, but this is a big 
mistake :-(.

I'll fix this.

Thanks.

Best Regards,

Boris
> Regards,
> Mike

WARNING: multiple messages have this Message-ID (diff)
From: boris brezillon <b.brezillon@overkiz.com>
To: Mike Turquette <mturquette@linaro.org>,
	Rob Herring <rob.herring@calxeda.com>,
	Pawel Moll <pawel.moll@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Stephen Warren <swarren@wwwdotorg.org>,
	Ian Campbell <ijc+devicetree@hellion.org.uk>,
	Rob Landley <rob@landley.net>, Andrew Victor <linux@maxim.org.za>,
	Nicolas Ferre <nicolas.ferre@atmel.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
	Russell King <linux@arm.linux.org.uk>,
	Felipe Balbi <balbi@ti.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Grant Likely <grant.likely@linaro.org>,
	Ludovic Desroches <ludovic.desroches@atmel.com>,
	Josh Wu <josh.wu@atmel.com>,
	Richard Genoud <richard.genoud@gmail.com>
Cc: devicetree@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org
Subject: Re: [PATCH v5 06/17] clk: at91: add PMC pll clocks
Date: Thu, 28 Nov 2013 09:34:10 +0100	[thread overview]
Message-ID: <52970002.3020405@overkiz.com> (raw)
In-Reply-To: <20131127214843.16819.59481@quantum>

Hi Mike,

On 27/11/2013 22:48, Mike Turquette wrote:
> Quoting Boris BREZILLON (2013-11-12 13:57:19)
>> +static const struct clk_ops pll_ops = {
>> +       .prepare = clk_pll_prepare,
>> +       .is_prepared = clk_pll_is_ready,
>> +       .disable = clk_pll_disable,
>> +       .is_enabled = clk_pll_is_ready,
>> +       .recalc_rate = clk_pll_recalc_rate,
>> +       .round_rate = clk_pll_round_rate,
>> +       .set_rate = clk_pll_set_rate,
>> +};
> Hi Boris,
>
> It is a bit strange to see only a .prepare and .disable callback
> populated. What happens if a driver calls clk_disable and then
> clk_enable? You clock will still be disabled in hardware.

Oops, I haven't thought about that.
I did this because the clk_pll_disable does not sleep, but this is a big 
mistake :-(.

I'll fix this.

Thanks.

Best Regards,

Boris
> Regards,
> Mike


  reply	other threads:[~2013-11-28  8:34 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-12 20:51 [PATCH v5 00/17] ARM: at91: move to common clk framework Boris BREZILLON
2013-11-12 20:51 ` Boris BREZILLON
2013-11-12 20:51 ` Boris BREZILLON
2013-11-12 20:55 ` [PATCH v5 01/17] ARM: at91: move at91_pmc.h to include/linux/clk/at91_pmc.h Boris BREZILLON
2013-11-12 20:55   ` Boris BREZILLON
2013-11-12 20:57 ` [PATCH v5 02/17] ARM: at91: add Kconfig options for common clk support Boris BREZILLON
2013-11-12 20:57   ` Boris BREZILLON
2013-11-12 20:57   ` Boris BREZILLON
2013-11-12 21:02 ` [PATCH v5 03/17] clk: at91: add PMC base support Boris BREZILLON
2013-11-12 21:02   ` Boris BREZILLON
2013-11-12 21:04 ` [PATCH v5 04/17] clk: at91: add PMC macro file for dt definitions Boris BREZILLON
2013-11-12 21:04   ` Boris BREZILLON
2013-11-12 21:54 ` [PATCH v5 05/17] clk: at91: add PMC main clock Boris BREZILLON
2013-11-12 21:54   ` Boris BREZILLON
2013-11-12 21:54   ` Boris BREZILLON
2013-11-12 21:57 ` [PATCH v5 06/17] clk: at91: add PMC pll clocks Boris BREZILLON
2013-11-12 21:57   ` Boris BREZILLON
2013-11-12 21:57   ` Boris BREZILLON
2013-11-27 21:48   ` Mike Turquette
2013-11-27 21:48     ` Mike Turquette
2013-11-27 21:48     ` Mike Turquette
2013-11-28  8:34     ` boris brezillon [this message]
2013-11-28  8:34       ` boris brezillon
2013-11-28  8:34       ` boris brezillon
2013-11-12 22:00 ` [PATCH v5 07/17] clk: at91: add PMC master clock Boris BREZILLON
2013-11-12 22:00   ` Boris BREZILLON
2013-11-12 22:00   ` Boris BREZILLON
2013-11-12 22:05 ` [PATCH v5 08/17] clk: at91: add PMC system clocks Boris BREZILLON
2013-11-12 22:05   ` Boris BREZILLON
2013-11-27 22:05   ` Mike Turquette
2013-11-27 22:05     ` Mike Turquette
2013-11-27 22:05     ` Mike Turquette
2013-11-12 22:08 ` [PATCH v5 09/17] clk: at91: add PMC peripheral clocks Boris BREZILLON
2013-11-12 22:08   ` Boris BREZILLON
2013-11-13  6:10 ` [PATCH v5 10/17] clk: at91: add peripheral clk macros for peripheral clk dt bindings Boris BREZILLON
2013-11-13  6:10   ` Boris BREZILLON
2013-11-13  6:10   ` Boris BREZILLON
2013-11-13  6:14 ` [PATCH v5 11/17] clk: at91: add PMC programmable clocks Boris BREZILLON
2013-11-13  6:14   ` Boris BREZILLON
2013-11-13  6:14   ` Boris BREZILLON
2013-11-13  6:17 ` [PATCH v5 12/17] clk: at91: add PMC utmi clock Boris BREZILLON
2013-11-13  6:17   ` Boris BREZILLON
2013-11-13  6:17   ` Boris BREZILLON
2013-11-13  6:20 ` [PATCH v5 13/17] clk: at91: add PMC usb clock Boris BREZILLON
2013-11-13  6:20   ` Boris BREZILLON
2013-11-13  6:22 ` [PATCH v5 14/17] clk: at91: add PMC smd clock Boris BREZILLON
2013-11-13  6:22   ` Boris BREZILLON
2013-11-13  6:22   ` Boris BREZILLON
2013-11-13  7:12 ` [PATCH v5 15/17] dt: binding: add at91 clks dt bindings documentation Boris BREZILLON
2013-11-13  7:12   ` Boris BREZILLON
2013-11-13  7:15 ` [PATCH v5 16/17] ARM: at91: move pit timer to common clk framework Boris BREZILLON
2013-11-13  7:15   ` Boris BREZILLON
2013-11-13  7:18 ` [PATCH v5 17/17] ARM: at91: add new compatible strings for pmc driver Boris BREZILLON
2013-11-13  7:18   ` Boris BREZILLON
2013-11-13  7:18   ` Boris BREZILLON
2013-11-30 22:56 ` [PATCH v5 00/17] ARM: at91: move to common clk framework Mike Turquette
2013-11-30 22:56   ` Mike Turquette
2013-11-30 22:56   ` Mike Turquette

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