linux-kernel - RE: [PATCH mfd v1] mfd: Add Renesas Synchronization Management Unit (SMU) support

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Message-ID: <OS3PR01MB65931F0244E7D2CE6FCB4080BA259@OS3PR01MB6593.jpnprd01.prod.outlook.com>
Date:   Tue, 25 May 2021 19:35:50 +0000
From:   Min Li <min.li.xe@...esas.com>
To:     Lee Jones <lee.jones@...aro.org>
CC:     "sameo@...ux.intel.com" <sameo@...ux.intel.com>,
        "grant.likely@...aro.org" <grant.likely@...aro.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH mfd v1] mfd: Add Renesas Synchronization Management Unit
 (SMU) support

 
> Why do you need to track how many there are?
> 
> We don't usually do that at all.
>

It is used to index the mfd_cell array, rsmu_cdev[RSMU_MAX_MFD_DEV]
 
The index is also used to enumerate the rsmu character device, say /dev/rsmu[0/1/2/3]

Min