linux-kernel - Re: [PATCH v4] mfd: rtsx: Modify rts5249_optimize

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Date:	Mon, 16 Sep 2013 12:22:24 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	wei_wang@...lsil.com.cn
Cc:	sameo@...ux.intel.com, devel@...uxdriverproject.org,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
	rogerable@...ltek.com, micky_ching@...lsil.com.cn
Subject: Re: [PATCH v4] mfd: rtsx: Modify rts5249_optimize_phy

On Fri, 13 Sep 2013, wei_wang@...lsil.com.cn wrote:

> From: Wei WANG <wei_wang@...lsil.com.cn>
> 
> In some platforms, specially Thinkpad series, rts5249 won't be
> initialized properly. So we need adjust some phy parameters to
> improve the compatibility issue.
> 
> It is a little different between simulation and real chip. We have
> no idea about which configuration is better before tape-out. We set
> default settings according to simulation, but need to tune these
> parameters after getting the real chip.
> 
> I can't explain every change in detail here. The below information is
> just a rough description:
> 
> PHY_REG_REV: Disable internal clkreq_tx, enable rx_pwst
> PHY_BPCR: No change, just turn the magic number to macro definitions
> PHY_PCR: Change OOBS sensitivity, from 60mV to 90mV
> PHY_RCR2: Control charge-pump current automatically
> PHY_FLD4: Use TX cmu reference clock
> PHY_RDR: Change RXDSEL from 30nF to 1.9nF
> PHY_RCR1: Change the duration between adp_st and asserting cp_en from
> 0.32 us to 0.64us
> PHY_FLD3: Adjust internal timers
> PHY_TUNE: Fine tune the regulator12 output voltage
> 
> Signed-off-by: Wei WANG <wei_wang@...lsil.com.cn>
> ---
>  drivers/mfd/rts5249.c        |   48 ++++++++++++++++++++++++++++++++++++--
>  include/linux/mfd/rtsx_pci.h |   53 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 99 insertions(+), 2 deletions(-)

Much better.

Applied, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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