linux-kernel - Re: [PATCH v9 2/4] pwm: opencores: Add PWM driver support

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Date:   Wed, 13 Dec 2023 17:03:26 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-pwm@...r.kernel.org>
CC:     Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Hal Feng <hal.feng@...rfivetech.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "Palmer Dabbelt" <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Subject: Re: [PATCH v9 2/4] pwm: opencores: Add PWM driver support



On 2023/12/8 19:47, Philipp Zabel wrote:
> Hi William,
> 
> On Fr, 2023-12-08 at 17:42 +0800, William Qiu wrote:
>> Add driver for OpenCores PWM Controller. And add compatibility code
>> which based on StarFive SoC.
>> 
>> Co-developed-by: Hal Feng <hal.feng@...rfivetech.com>
>> Signed-off-by: Hal Feng <hal.feng@...rfivetech.com>
>> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
>> ---
> [...]
>> diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
>> index 4b956d661755..d87e1bb350ba 100644
>> --- a/drivers/pwm/Kconfig
>> +++ b/drivers/pwm/Kconfig
>> @@ -444,6 +444,18 @@ config PWM_NTXEC
>>  	  controller found in certain e-book readers designed by the original
>>  	  design manufacturer Netronix.
>>  
>> +config PWM_OCORES
>> +	tristate "OpenCores PWM support"
>> +	depends on HAS_IOMEM && OF
>> +	depends on COMMON_CLK && RESET_CONTROLLER
> 
> There is no need for reset consumers to depend on RESET_CONTROLLER.
> 
Will drop
> [...]
>> diff --git a/drivers/pwm/pwm-ocores.c b/drivers/pwm/pwm-ocores.c
>> new file mode 100644
>> index 000000000000..996ca3805901
>> --- /dev/null
>> +++ b/drivers/pwm/pwm-ocores.c
>> @@ -0,0 +1,229 @@
> [...]
>> +static int ocores_pwm_probe(struct platform_device *pdev)
>> +{
> [...]
>> +	ddata->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
> 
> Missing error handling.
> 
Will add.
>> +	reset_control_deassert(ddata->rst);
> 
> Missing error handling.
> 
Will add.
> 

Thank you for spending time on this patch series.

Best Regards,
William
> regards
> Philipp