linux-kernel - Re: [PATCH v3 1/3] firmware: xilinx: Add pinctrl support

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Message-ID: <ecef1943-fec3-9b35-a326-87764512c691@monstr.eu>
Date:   Mon, 1 Mar 2021 08:07:27 +0100
From:   Michal Simek <monstr@...str.eu>
To:     Nobuhiro Iwamatsu <iwamatsu@...auri.org>,
        Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@...inx.com>
Cc:     saikrishna12468@...il.com, devicetree@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Michal Simek <michal.simek@...inx.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-gpio@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        git@...inx.com, linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 1/3] firmware: xilinx: Add pinctrl support

Hi Noburiho,

On 2/28/21 1:17 AM, Nobuhiro Iwamatsu wrote:
> Hi,
> 
> 2021年2月12日(金) 21:10 Sai Krishna Potthuri
> <lakshmi.sai.krishna.potthuri@...inx.com>:
>>
>> Adding pinctrl support to query platform specific information (pins)
>> from firmware.
>>
>> Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@...inx.com>
>> Acked-by: Michal Simek <michal.simek@...inx.com>
>> ---
>>  drivers/firmware/xilinx/zynqmp.c     | 114 +++++++++++++++++++++++++++
>>  include/linux/firmware/xlnx-zynqmp.h |  90 +++++++++++++++++++++
>>  2 files changed, 204 insertions(+)
>>
>> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
>> index efb8a66efc68..299c3d5a9ebd 100644
>> --- a/drivers/firmware/xilinx/zynqmp.c
>> +++ b/drivers/firmware/xilinx/zynqmp.c
>> @@ -784,6 +784,120 @@ int zynqmp_pm_fpga_get_status(u32 *value)
>>  }
>>  EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
>>
> 
> <snip>
> 
>> @@ -125,6 +131,12 @@ enum pm_query_id {
>>         PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS,
>>         PM_QID_CLOCK_GET_PARENTS,
>>         PM_QID_CLOCK_GET_ATTRIBUTES,
>> +       PM_QID_PINCTRL_GET_NUM_PINS = 6,
>> +       PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7,
>> +       PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8,
>> +       PM_QID_PINCTRL_GET_FUNCTION_NAME = 9,
>> +       PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10,
>> +       PM_QID_PINCTRL_GET_PIN_GROUPS = 11,
> 
> These do not have to have values, Because PM_QID_INVALID is 0.
> 
>>         PM_QID_CLOCK_GET_NUM_CLOCKS = 12,
> 
> And you can drop value from this.

Please take a look at
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/firmware/xlnx-zynqmp.h?h=v5.12-rc1&id=1077d4367ab3b97f6db2f66c87289af863652215

We are using explicit values as was recommended by Greg.

Thanks,
Michal


-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs