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

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Date:   Thu, 19 Dec 2019 20:44:07 -0600
From:   Suman Anna <s-anna@...com>
To:     Tero Kristo <t-kristo@...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

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' :)

> 
> 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)
>