linux-kernel - Re: [PATCHv3 08/15] remoteproc/omap: Remove the unused fields from platform data

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Date:   Fri, 20 Dec 2019 11:48:39 +0200
From:   Tero Kristo <t-kristo@...com>
To:     Suman Anna <s-anna@...com>, <bjorn.andersson@...aro.org>,
        <ohad@...ery.com>, <linux-remoteproc@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <mathieu.poirier@...aro.org>,
        <linux-omap@...r.kernel.org>
Subject: Re: [PATCHv3 08/15] remoteproc/omap: Remove the unused fields from
 platform data

On 20/12/2019 04:44, Suman Anna wrote:
> Hi Tero,
> 
> On 12/13/19 6:55 AM, Tero Kristo wrote:
>> From: Suman Anna <s-anna@...com>
>>
>> The following fields: .name, .oh_name, .oh_name_opt, .mbox_name,
>> .firmware, .ops and .set_bootaddr, are removed from the platform data,
>> as these are no longer needed after the addition of DT support to the
>> OMAP remoteproc driver.
>>
>> The .name field was used to give a name to the remoteproc, and this
>> is replaced with the device name. The .ops field was never used by
>> the OMAP remoteproc driver. The .mbox_name was used to define the
>> sub-mailbox node used for communication with the remote processor,
>> and is retrieved using the 'mboxes' property in the DT node. The
>> .firmware field is encoded directly in the OMAP remoteproc driver and
>> is retrieved using driver match data. The .set_bootaddr ops was used
>> for using a OMAP Control Module API to configure the boot address for
>> the processor, and is now implemented within the driver using a
>> syscon property.
>>
>> The .oh_name field is used to define the primary hwmod for the processor
>> node, and is represented using the 'ti,hwmods' property in the DT node.
>> The .oh_name_opt field was primarily defined to identify the hwmod for
>> the second cpu in a dual Cortex-M3/M4 IPU processor sub-system. This
>> hwmod entry is no longer defined usually, but rather a single hwmod
>> representing both the processors in the IPU sub-system is defined.
>> A single firmware image (either in SMP-mode or a combined image for
>> non-SMP mode) is used, with both the resets released together always
>> as part of the device management. Any power management and recovery
>> aspects require that both the processors be managed as one entity due
>> to the presence of shared MMU and unicache within the IPU sub-system.
>>
>> The OMAP remoteproc platform data structure is eventually expected
>> to be removed completely once the other dependencies with the
>> mach-omap layer are met.
> 
> This patch was a cleanup patch with DT using hwmod, and some of the
> description is pertinent to that. Now that you have converted to ti,sysc
> & reset with no dependencies against hwmod, the time for removing the
> structure is here. Some of the patch description is no longer correct as
> well since there is no 'ti,hwmods' :)

Hmm right, let me see if the header can be dropped completely.

-Tero

> 
>>
>> Signed-off-by: Suman Anna <s-anna@...com>
>> Signed-off-by: Tero Kristo <t-kristo@...com>
>> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
>> ---
>>   include/linux/platform_data/remoteproc-omap.h | 17 +----------------
>>   1 file changed, 1 insertion(+), 16 deletions(-)
>>
>> diff --git a/include/linux/platform_data/remoteproc-omap.h b/include/linux/platform_data/remoteproc-omap.h
>> index 7e3a16097672..6bea01e199fe 100644
>> --- a/include/linux/platform_data/remoteproc-omap.h
>> +++ b/include/linux/platform_data/remoteproc-omap.h
>> @@ -2,38 +2,23 @@
>>   /*
>>    * Remote Processor - omap-specific bits
>>    *
>> - * Copyright (C) 2011 Texas Instruments, Inc.
>> + * Copyright (C) 2011-2018 Texas Instruments Incorporated - http://www.ti.com/
> 
> %s/2018/2019 when you do update the patch.
> 
> regards
> Suman
> 
>>    * Copyright (C) 2011 Google, Inc.
>>    */
>>   
>>   #ifndef _PLAT_REMOTEPROC_H
>>   #define _PLAT_REMOTEPROC_H
>>   
>> -struct rproc_ops;
>>   struct platform_device;
>>   
>>   /*
>>    * struct omap_rproc_pdata - omap remoteproc's platform data
>> - * @name: the remoteproc's name
>> - * @oh_name: omap hwmod device
>> - * @oh_name_opt: optional, secondary omap hwmod device
>> - * @firmware: name of firmware file to load
>> - * @mbox_name: name of omap mailbox device to use with this rproc
>> - * @ops: start/stop rproc handlers
>>    * @device_enable: omap-specific handler for enabling a device
>>    * @device_shutdown: omap-specific handler for shutting down a device
>> - * @set_bootaddr: omap-specific handler for setting the rproc boot address
>>    */
>>   struct omap_rproc_pdata {
>> -	const char *name;
>> -	const char *oh_name;
>> -	const char *oh_name_opt;
>> -	const char *firmware;
>> -	const char *mbox_name;
>> -	const struct rproc_ops *ops;
>>   	int (*device_enable)(struct platform_device *pdev);
>>   	int (*device_shutdown)(struct platform_device *pdev);
>> -	void (*set_bootaddr)(u32);
>>   };
>>   
>>   #if defined(CONFIG_OMAP_REMOTEPROC) || defined(CONFIG_OMAP_REMOTEPROC_MODULE)
>>
> 

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