linux-kernel - Re: [PATCH v6 07/11] i2c: designware: Discard Cherry Trail model flag

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Date:   Thu, 28 May 2020 13:06:35 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Rob Herring <robh+dt@...nel.org>, linux-mips@...r.kernel.org,
        devicetree@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 07/11] i2c: designware: Discard Cherry Trail model flag

On Thu, May 28, 2020 at 12:33:17PM +0300, Serge Semin wrote:
> A PM workaround activated by the flag MODEL_CHERRYTRAIL has been removed
> since commit 9cbeeca05049 ("i2c: designware: Remove Cherry Trail PMIC I2C
> bus pm_disabled workaround"), but the flag most likely by mistake has been
> left in the Dw I2C drivers. Let's remove it. Since MODEL_MSCC_OCELOT is
> the only model-flag left, redefine it to be 0x100 so setting a very first
> bit in the MODEL_MASK bits range.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Conditionally, in case Wolfram and Jarkko are fine with shuffling model
defines, which I consider an unneeded churn.

> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Acked-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
> Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: linux-mips@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> 
> ---
> 
> Changelog v3:
> - Since MSCC and Baikal-T1 will be a part of the platform driver code, we
>   have to preserve the MODEL_MASK macro to use it to filter the model
>   flags during the IP-specific quirks activation.
> ---
>  drivers/i2c/busses/i2c-designware-core.h    | 3 +--
>  drivers/i2c/busses/i2c-designware-pcidrv.c  | 1 -
>  drivers/i2c/busses/i2c-designware-platdrv.c | 2 +-
>  3 files changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
> index 150de5e5c31b..b9ef9b0deef0 100644
> --- a/drivers/i2c/busses/i2c-designware-core.h
> +++ b/drivers/i2c/busses/i2c-designware-core.h
> @@ -289,8 +289,7 @@ struct dw_i2c_dev {
>  #define ACCESS_INTR_MASK	0x00000004
>  #define ACCESS_NO_IRQ_SUSPEND	0x00000008
>  
> -#define MODEL_CHERRYTRAIL	0x00000100
> -#define MODEL_MSCC_OCELOT	0x00000200
> +#define MODEL_MSCC_OCELOT	0x00000100
>  #define MODEL_MASK		0x00000f00
>  
>  u32 dw_readl(struct dw_i2c_dev *dev, int offset);
> diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
> index 11a5e4751eab..947c096f86e3 100644
> --- a/drivers/i2c/busses/i2c-designware-pcidrv.c
> +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
> @@ -149,7 +149,6 @@ static struct dw_pci_controller dw_pci_controllers[] = {
>  	},
>  	[cherrytrail] = {
>  		.bus_num = -1,
> -		.flags = MODEL_CHERRYTRAIL,
>  		.scl_sda_cfg = &byt_config,
>  	},
>  	[elkhartlake] = {
> diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
> index f6d2c96e35ce..ca057aa9eac4 100644
> --- a/drivers/i2c/busses/i2c-designware-platdrv.c
> +++ b/drivers/i2c/busses/i2c-designware-platdrv.c
> @@ -44,7 +44,7 @@ static const struct acpi_device_id dw_i2c_acpi_match[] = {
>  	{ "INT3432", 0 },
>  	{ "INT3433", 0 },
>  	{ "80860F41", ACCESS_NO_IRQ_SUSPEND },
> -	{ "808622C1", ACCESS_NO_IRQ_SUSPEND | MODEL_CHERRYTRAIL },
> +	{ "808622C1", ACCESS_NO_IRQ_SUSPEND },
>  	{ "AMD0010", ACCESS_INTR_MASK },
>  	{ "AMDI0010", ACCESS_INTR_MASK },
>  	{ "AMDI0510", 0 },
> -- 
> 2.26.2
> 

-- 
With Best Regards,
Andy Shevchenko