linux-kernel - Re: [RFT PATCH 1/2] i2c: tegra: update CONFIG

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Message-ID: <20150731104259.GD1522@katana>
Date:	Fri, 31 Jul 2015 12:42:59 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	swarren@...dotorg.org, thierry.reding@...il.com,
	andrewc@...dia.com, gnurou@...il.com, linux-i2c@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	Chaitanya Bandi <bandik@...dia.com>
Subject: Re: [RFT PATCH 1/2] i2c: tegra: update CONFIG_LOAD for new
 conifiguration

On Tue, Jun 30, 2015 at 04:24:26PM +0530, Laxman Dewangan wrote:
> Once the new configuration is set on the conifg register of
> I2C controller, it is require to update the CONFIG_LOAD register
> to transfer the new SW configuration to actual HW internal
> registers that would be used in the actual logic.
> 
> It is like, SW is programming only shadow registers through
> regular configuration and when these load_config bit fields
> are set to 1, it causes the regular/shadows registers
> configuration transferred to the HW internal active registers.
> So SW has to set these bit fields at the end of all regular
> registers configuration. And these config_load bits are HW
> auto-clear bits. HW clears these bit fields once the register
> configuration is moved to HW internal active registers. So SW
> has to wait until these bits are auto-cleared before going
> for any further programming
> 
> This mechanism is supported on T124 and after this SoCs.
> 
> This is based on change done by
> 	Chaitanya Bandi <bandik@...dia.com>
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> Signed-off-by: Chaitanya Bandi <bandik@...dia.com>

Applied to for-next, thanks!


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