linux-kernel - Re: [RFC v3 04/18] firmware: thead: Add AON firmware protocol driver

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Message-ID: <51846fb3-3d86-4ba7-8504-0725d3cd738f@samsung.com>
Date: Tue, 28 Jan 2025 17:27:10 +0100
From: Michal Wilczynski <m.wilczynski@...sung.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, drew@...7.com, guoren@...nel.org,
	wefu@...hat.com, jassisinghbrar@...il.com, paul.walmsley@...ive.com,
	palmer@...belt.com, aou@...s.berkeley.edu, frank.binns@...tec.com,
	matt.coster@...tec.com, maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com, simona@...ll.ch,
	ulf.hansson@...aro.org, jszhang@...nel.org, p.zabel@...gutronix.de,
	m.szyprowski@...sung.com, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
	linux-pm@...r.kernel.org
Subject: Re: [RFC v3 04/18] firmware: thead: Add AON firmware protocol
 driver



On 1/28/25 16:54, Michal Wilczynski wrote:
> 
> 
> On 1/21/25 10:56, Krzysztof Kozlowski wrote:
> 
>>> diff --git a/include/linux/firmware/thead/thead,th1520-aon.h b/include/linux/firmware/thead/thead,th1520-aon.h
>>> new file mode 100644
>>> index 000000000000..3daa17c01d17
>>> --- /dev/null
>>> +++ b/include/linux/firmware/thead/thead,th1520-aon.h
>>> @@ -0,0 +1,186 @@
>>> +/* SPDX-License-Identifier: GPL-2.0 */
>>> +/*
>>> + * Copyright (C) 2021 Alibaba Group Holding Limited.
>>> + */
>>> +
>>> +#ifndef _THEAD_AON_H
>>> +#define _THEAD_AON_H
>>> +
>>> +#include <linux/device.h>
>>> +#include <linux/types.h>
>>> +
>>> +#define AON_RPC_MSG_MAGIC (0xef)
>>> +#define TH1520_AON_RPC_VERSION 2
>>> +#define TH1520_AON_RPC_MSG_NUM 7
>>> +
>>> +extern struct th1520_aon_chan *aon_chan;
>>
>> Drop all externs.
> 
> This is required so the code will compile as the
> int th1520_aon_call_rpc(struct th1520_aon_chan *aon_chan, void *msg);
> is non static and exposed in the same header.
> 
> I really would like to keep th1520_aon_call_rpc in this header, as it
> could be useful for other drivers to construct their own RPC calls to
> reboot or shutdown the system e.g watchdog.

Oh I get it, simply drop extern not the whole expression, sorry it's
fine.

> 
>>
>>
>> Best regards,
>> Krzysztof
>>
>>