linux-kernel - Re: [PATCH 1/2] i2c-designware-pci: Add Haswell ULT device IDs

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Date:	Mon, 21 Oct 2013 09:53:42 +0300
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Benson Leung <bleung@...omium.org>
Cc:	wsa@...-dreams.de, khali@...ux-fr.org,
	andriy.shevchenko@...ux.intel.com, jacmet@...site.dk,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	dlaurie@...omium.org
Subject: Re: [PATCH 1/2] i2c-designware-pci: Add Haswell ULT device IDs

On Sun, Oct 20, 2013 at 08:26:49PM -0700, Benson Leung wrote:
> From: Duncan Laurie <dlaurie@...omium.org>
> 
> Add the necessary PCI Device IDs to use the Haswell ULT
> I2C controller in PCI mode.
> 
> Set the bus numbers to -1 so it will use dynamic assignment
> rather than hardcoded.
> 
> Signed-off-by: Duncan Laurie <dlaurie@...omium.org>
> Signed-off-by: Benson Leung <bleung@...omium.org>

Looks good to me, except one thing...

> ---
>  drivers/i2c/busses/i2c-designware-pcidrv.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
> index f6ed06c..e4cbbdf 100644
> --- a/drivers/i2c/busses/i2c-designware-pcidrv.c
> +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
> @@ -54,6 +54,9 @@ enum dw_pci_ctl_id_t {
>  	medfield_3,
>  	medfield_4,
>  	medfield_5,
> +
> +	haswell_0,
> +	haswell_1,
>  };
>  
>  struct dw_pci_controller {
> @@ -132,6 +135,20 @@ static struct  dw_pci_controller  dw_pci_controllers[] = {
>  		.rx_fifo_depth = 32,
>  		.clk_khz      = 25000,
>  	},
> +	[haswell_0] = {
> +		.bus_num     = -1,
> +		.bus_cfg   = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_STD,
> +		.tx_fifo_depth = 32,
> +		.rx_fifo_depth = 32,
> +		.clk_khz      = 25000,

The input clock for I2C in Haswell is 100MHz, not 25MHz.

> +	},
> +	[haswell_1] = {
> +		.bus_num     = -1,
> +		.bus_cfg   = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_STD,
> +		.tx_fifo_depth = 32,
> +		.rx_fifo_depth = 32,
> +		.clk_khz      = 25000,

Ditto.

> +	},
>  };
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