linux-kernel - Re: [PATCH 1/2] i2c: tegra: Add logic to support different register offsets

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Message-ID: <bf65d60a-347f-4810-bf76-71f2fd6920bc@nvidia.com>
Date: Tue, 28 Oct 2025 11:12:30 +0530
From: Kartik Rajput <kkartik@...dia.com>
To: Jon Hunter <jonathanh@...dia.com>, akhilrajeev@...dia.com,
 andi.shyti@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, thierry.reding@...il.com, ldewangan@...dia.com,
 digetx@...il.com, smangipudi@...dia.com, linux-i2c@...r.kernel.org,
 devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] i2c: tegra: Add logic to support different register
 offsets

Hi Jon,

Thanks for reviewing the patch!

On 24/10/25 21:03, Jon Hunter wrote:
> 
> On 01/10/2025 16:36, Kartik Rajput wrote:
>> Tegra410 use different offsets for existing I2C registers, update
>> the logic to use appropriate offsets per SoC.
>>
>> Signed-off-by: Kartik Rajput <kkartik@...dia.com>
>> ---
>>   drivers/i2c/busses/i2c-tegra.c | 499 ++++++++++++++++++++++-----------
>>   1 file changed, 334 insertions(+), 165 deletions(-)
>>
>> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
>> index 038809264526..1e26d67cbd30 100644
>> --- a/drivers/i2c/busses/i2c-tegra.c
>> +++ b/drivers/i2c/busses/i2c-tegra.c
> 
> ...
> 
>> +static const struct tegra_i2c_regs tegra20_i2c_regs_dvc = {
>> +    .cnfg = 0x000 + 0x40,
>> +    .status = 0x01c + 0x40,
>> +    .sl_cnfg = 0x020 + 0x40,
>> +    .sl_addr1 = 0x02c + 0x40,
>> +    .sl_addr2 = 0x030 + 0x40,
>> +    .tlow_sext = 0x034 + 0x40,
>> +    .tx_fifo = 0x050 + 0x10,
>> +    .rx_fifo = 0x054 + 0x10,
>> +    .packet_transfer_status = 0x058 + 0x10,
>> +    .fifo_control = 0x05c + 0x10,
>> +    .fifo_status = 0x060 + 0x10,
>> +    .int_mask = 0x064 + 0x10,
>> +    .int_status = 0x068 + 0x10,
>> +    .clk_divisor = 0x06c + 0x10,
>> +    .bus_clear_cnfg = 0x084 + 0x40,
>> +    .bus_clear_status = 0x088 + 0x40,
>> +    .config_load = 0x08c + 0x40,
>> +    .clken_override = 0x090 + 0x40,
>> +    .interface_timing_0 = 0x094 + 0x40,
>> +    .interface_timing_1 = 0x098 + 0x40,
>> +    .hs_interface_timing_0 = 0x09c + 0x40,
>> +    .hs_interface_timing_1 = 0x0a0 + 0x40,
>> +    .master_reset_cntrl = 0x0a8 + 0x40,
>> +    .mst_fifo_control = 0x0b4 + 0x10,
>> +    .mst_fifo_status = 0x0b8 + 0x10,
>> +    .sw_mutex = 0x0ec + 0x40,
> 
> sw_mutex is not supported for Tegra20 or anything before Tegra264.
> 
> Jon
>

Ack.

Thanks,
Kartik