From: Zhou Yanjie <zhouyanjie@wanyeetech.com>
To: Paul Cercueil <paul@crapouillou.net>
Cc: broonie@kernel.org, robh+dt@kernel.org, krzk+dt@kernel.org,
linux-spi@vger.kernel.org, linux-mips@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
contact@artur-rojek.eu, dongsheng.qiu@ingenic.com,
aric.pzqi@ingenic.com, rick.tyliu@ingenic.com,
sernia.zhou@foxmail.com, zhenwenjin@gmail.com,
reimu@sudomaker.com
Subject: Re: [PATCH 1/3] SPI: Ingenic: Add support for use GPIO as chip select line.
Date: Wed, 20 Apr 2022 01:29:54 +0800 [thread overview]
Message-ID: <797abbbe-2bef-001f-9b4c-5d8e607b2f1c@wanyeetech.com> (raw)
In-Reply-To: <IUJLAR.XMD0PY9XJ5X41@crapouillou.net>
Hi Paul,
On 2022/4/20 上午1:13, Paul Cercueil wrote:
> Hi Zhou,
>
> Le ven., avril 15 2022 at 22:22:06 +0800, 周琰杰 (Zhou Yanjie)
> <zhouyanjie@wanyeetech.com> a écrit :
>> Add support for using GPIOs as chip select lines on Ingenic SoCs.
>>
>> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
>> ---
>> drivers/spi/spi-ingenic.c | 11 +++++++++--
>> 1 file changed, 9 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/spi/spi-ingenic.c b/drivers/spi/spi-ingenic.c
>> index 03077a7..672e4ed 100644
>> --- a/drivers/spi/spi-ingenic.c
>> +++ b/drivers/spi/spi-ingenic.c
>> @@ -380,7 +380,7 @@ static int spi_ingenic_probe(struct
>> platform_device *pdev)
>> struct spi_controller *ctlr;
>> struct ingenic_spi *priv;
>> void __iomem *base;
>> - int ret;
>> + int num_cs, ret;
>>
>> pdata = of_device_get_match_data(dev);
>> if (!pdata) {
>> @@ -416,6 +416,11 @@ static int spi_ingenic_probe(struct
>> platform_device *pdev)
>> if (IS_ERR(priv->flen_field))
>> return PTR_ERR(priv->flen_field);
>>
>> + if (of_property_read_u32(dev->of_node, "num-cs", &num_cs)) {
>
> One small comment here - I think it would be better to use
> device_property_read_u32().
>
> The driver should also use device_get_match_data() instead of
> of_device_get_match_data(), but that's a cleanup that can be done later.
>
Sure, I will send v2.
Thanks and best regards!
> Cheers,
> -Paul
>
>> + dev_warn(dev, "Number of chip select lines not specified.\n");
>> + num_cs = 2;
>> + }
>> +
>> platform_set_drvdata(pdev, ctlr);
>>
>> ctlr->prepare_transfer_hardware = spi_ingenic_prepare_hardware;
>> @@ -429,7 +434,9 @@ static int spi_ingenic_probe(struct
>> platform_device *pdev)
>> ctlr->bits_per_word_mask = pdata->bits_per_word_mask;
>> ctlr->min_speed_hz = 7200;
>> ctlr->max_speed_hz = 54000000;
>> - ctlr->num_chipselect = 2;
>> + ctlr->use_gpio_descriptors = true;
>> + ctlr->max_native_cs = 2;
>> + ctlr->num_chipselect = num_cs;
>> ctlr->dev.of_node = pdev->dev.of_node;
>>
>> if (spi_ingenic_request_dma(ctlr, dev))
>> --
>> 2.7.4
>>
>
next prev parent reply other threads:[~2022-04-19 17:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-15 14:22 [PATCH 0/3] Improve SPI support for Ingenic SoCs 周琰杰 (Zhou Yanjie)
2022-04-15 14:22 ` [PATCH 1/3] SPI: Ingenic: Add support for use GPIO as chip select line 周琰杰 (Zhou Yanjie)
2022-04-15 15:00 ` Paul Cercueil
2022-04-16 11:55 ` Zhou Yanjie
2022-04-16 16:36 ` Paul Cercueil
2022-04-19 17:00 ` Mark Brown
2022-04-19 17:10 ` Paul Cercueil
2022-04-19 17:28 ` Zhou Yanjie
2022-04-19 17:13 ` Paul Cercueil
2022-04-19 17:29 ` Zhou Yanjie [this message]
2022-04-15 14:22 ` [PATCH 2/3] dt-bindings: SPI: Add bindings for new Ingenic SoCs 周琰杰 (Zhou Yanjie)
2022-04-15 15:03 ` Paul Cercueil
2022-04-18 12:26 ` Krzysztof Kozlowski
2022-04-15 14:22 ` [PATCH 3/3] SPI: Ingenic: Add support " 周琰杰 (Zhou Yanjie)
2022-04-15 15:04 ` Paul Cercueil
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