linux-kernel - Re: [PATCH 3/4] ARM: tegra: Add OF_DEV_AUXDATA for uart driver in board dt

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Date:	Tue, 18 Dec 2012 12:30:41 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Prashant Gaikwad <pgaikwad@...dia.com>
CC:	Stephen Warren <swarren@...dotorg.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] ARM: tegra: Add OF_DEV_AUXDATA for uart driver in
 board dt

On Tuesday 18 December 2012 11:48 AM, Prashant Gaikwad wrote:
> On Tuesday 18 December 2012 03:17 AM, Stephen Warren wrote:
>> On 12/17/2012 05:08 AM, Laxman Dewangan wrote:
>>> Add OF_DEV_AUXDATA for high speed uart controller driver for
>>> Tegra20/Tegra30 board dt files.
>>> Set the parent clock of uart controller to PLLP.
>>> diff --git a/arch/arm/mach-tegra/board-dt-tegra20.c b/arch/arm/mach-tegra/board-dt-tegra20.c
>>> @@ -94,6 +94,11 @@ struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
>>> +	OF_DEV_AUXDATA("nvidia,tegra20-hsuart", 0x70006000, "tegra-uart.0", NULL),
>>> +	OF_DEV_AUXDATA("nvidia,tegra20-hsuart", 0x70006040, "tegra-uart.1", NULL),
>>> +	OF_DEV_AUXDATA("nvidia,tegra20-hsuart", 0x70006200, "tegra-uart.2", NULL),
>>> +	OF_DEV_AUXDATA("nvidia,tegra20-hsuart", 0x70006300, "tegra-uart.3", NULL),
>>> +	OF_DEV_AUXDATA("nvidia,tegra20-hsuart", 0x70006400, "tegra-uart.4", NULL),
>> Instead, can we simply get the clocks from device tree? Prashant, how
>> much effort will that be once your clock patches are checked in, or is
>> it already part of those patches?
> It is not part of rework patches, but I will send a patch for it
> immediately after those patches are accepted upstream.
>
>>> @@ -106,7 +111,10 @@ struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
>>>    static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
>>>    	/* name		parent		rate		enabled */
>>>    	{ "uarta",	"pll_p",	216000000,	true },
>>> +	{ "uartb",	"pll_p",	216000000,	false },
>>> +	{ "uartc",	"pll_p",	216000000,	false },
>>>    	{ "uartd",	"pll_p",	216000000,	true },
>>> +	{ "uarte",	"pll_p",	216000000,	false },
>> Prashant's clock patches remove this table. Please work with him to work
>> out how to deal with that.
> Laxman,
>
> If you want I can include these entries in current tables.

No issue, you can add this in your change.
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