linux-kernel - Re: [PATCH v1 07/12] nvmem: microchip-otpc: Add missing register definitions

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Message-ID: <aeed6b52-98df-4515-a3df-5ccc8429e022@tuxon.dev>
Date: Sat, 31 Aug 2024 18:33:50 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Christian Melki <christian.melki@...ata.com>,
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
 "moderated list:MICROCHIP OTPC DRIVER"
 <linux-arm-kernel@...ts.infradead.org>,
 open list <linux-kernel@...r.kernel.org>,
 Nicolas Ferre <nicolas.ferre@...rochip.com>
Subject: Re: [PATCH v1 07/12] nvmem: microchip-otpc: Add missing register
 definitions



On 28.08.2024 11:14, Alexander Dahl wrote:
> Hello Claudiu,
> 
> Am Sat, Aug 24, 2024 at 06:54:02PM +0300 schrieb claudiu beznea:
>>
>>
>> On 21.08.2024 13:59, Alexander Dahl wrote:
>>> According to datasheets DS60001765B for SAMA7G5 and DS60001579G for
>>> SAM9X60.
>>>
>>> Signed-off-by: Alexander Dahl <ada@...rsis.com>
>>> ---
>>>  drivers/nvmem/microchip-otpc.c | 15 +++++++++++++++
>>>  1 file changed, 15 insertions(+)
>>>
>>> diff --git a/drivers/nvmem/microchip-otpc.c b/drivers/nvmem/microchip-otpc.c
>>> index b8ed7412dbca..4630e96243ac 100644
>>> --- a/drivers/nvmem/microchip-otpc.c
>>> +++ b/drivers/nvmem/microchip-otpc.c
>>> @@ -21,9 +21,24 @@
>>>  #define MCHP_OTPC_AR			(0x8)
>>>  #define MCHP_OTPC_SR			(0xc)
>>>  #define MCHP_OTPC_SR_READ		BIT(6)
>>> +#define MCHP_OTPC_IER			(0x10)
>>> +#define MCHP_OTPC_IDR			(0x14)
>>> +#define MCHP_OTPC_IMR			(0x18)
>>> +#define MCHP_OTPC_ISR			(0x1C)
>>> +#define MCHP_OTPC_ISR_COERR		BIT(13)
>>>  #define MCHP_OTPC_HR			(0x20)
>>>  #define MCHP_OTPC_HR_SIZE		GENMASK(15, 8)
>>>  #define MCHP_OTPC_DR			(0x24)
>>> +#define MCHP_OTPC_BAR			(0x30)
>>> +#define MCHP_OTPC_CAR			(0x34)
>>> +#define MCHP_OTPC_UHC0R			(0x50)
>>> +#define MCHP_OTPC_UHC1R			(0x54)
>>> +#define MCHP_OTPC_UID0R			(0x60)
>>> +#define MCHP_OTPC_UID1R			(0x64)
>>> +#define MCHP_OTPC_UID2R			(0x68)
>>> +#define MCHP_OTPC_UID3R			(0x6C)
>>> +#define MCHP_OTPC_WPMR			(0xE4)
>>> +#define MCHP_OTPC_WPSR			(0xE8)
>>
>> Are all these used in driver?
> 
> Not all, but some.  What are you implying?  Only add register
> definitions actually used in the driver? 

Yes!

> Why?

Less code to maintain. If it's not used there is no meaning to have it.


> 
> Those register offsets won't change, but helped us when debugging.
> Debug code (e.g. register dump) is not part of the patch series.
> 
> Greets
> Alex
> 
>>
>>>  
>>>  #define MCHP_OTPC_NAME			"mchp-otpc"
>>>  #define MCHP_OTPC_SIZE			(11 * 1024)