linux-kernel - Re: [PATCH v3 2/2] ahci: add support for Hisilicon sata

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Date:	Mon, 21 Apr 2014 12:13:27 +0800
From:	"kefeng.wang" <kefeng.wang@...aro.org>
To:	Hans de Goede <hdegoede@...hat.com>
CC:	Kefeng Wang <wangkefeng.wang@...wei.com>,
	Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] ahci: add support for Hisilicon sata

Hi Hans,

A hflags argument is useless in ahci_platform_init_host for another driver's caller,
use the pointer of ata_port_info in ahci_probe, is this OK?

Regards,
Kefeng

On 2014-4-21 12:01, Kefeng Wang wrote:
> The hip04 SoC of hisilicon has an AHCI compliant SATA controller,
> and it is compliant with the ahci 1.3 and sata 3.0 specification.
> 
> There is a wrong bit in HOST_CAP of hip04 sata controller, which
> enable unsupported feature of FBS, use AHCI_HFLAG_NO_FBS hflag to
> disable it.
> 
> Cc: Hans de Geode <hdegoede@...hat.com>
> Signed-off-by: Kefeng Wang <kefeng.wang@...aro.org>
> ---
>  .../devicetree/bindings/ata/ahci-platform.txt      |    3 ++-
>  drivers/ata/ahci_platform.c                        |   10 ++++++++--
>  2 files changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
> index 48b285f..aab1d70 100644
> --- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
> +++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
> @@ -7,7 +7,8 @@ Required properties:
>  - compatible        : compatible list, one of "snps,spear-ahci",
>                        "snps,exynos5440-ahci", "ibm,476gtr-ahci",
>                        "allwinner,sun4i-a10-ahci", "fsl,imx53-ahci"
> -                      "fsl,imx6q-ahci" or "snps,dwc-ahci"
> +                      "fsl,imx6q-ahci", "snps,dwc-ahci" or
> +                      "hisilicon,hisi-ahci"
>  - interrupts        : <interrupt mapping for SATA IRQ>
>  - reg               : <registers mapping>
>  
> diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
> index ef67e79..48b9feb 100644
> --- a/drivers/ata/ahci_platform.c
> +++ b/drivers/ata/ahci_platform.c
> @@ -17,11 +17,12 @@
>  #include <linux/pm.h>
>  #include <linux/device.h>
>  #include <linux/platform_device.h>
> +#include <linux/of_device.h>
>  #include <linux/libata.h>
>  #include <linux/ahci_platform.h>
>  #include "ahci.h"
>  
> -static const struct ata_port_info ahci_port_info = {
> +static struct ata_port_info ahci_port_info = {
>  	.flags		= AHCI_FLAG_COMMON,
>  	.pio_mask	= ATA_PIO4,
>  	.udma_mask	= ATA_UDMA6,
> @@ -32,6 +33,7 @@ static int ahci_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct ahci_platform_data *pdata = dev_get_platdata(dev);
> +	struct ata_port_info *pi = &ahci_port_info;
>  	struct ahci_host_priv *hpriv;
>  	int rc;
>  
> @@ -55,7 +57,10 @@ static int ahci_probe(struct platform_device *pdev)
>  			goto disable_resources;
>  	}
>  
> -	rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info, 0, 0);
> +	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
> +		pi->private_data = (void *)AHCI_HFLAG_NO_FBS;
> +
> +	rc = ahci_platform_init_host(pdev, hpriv, pi, 0, 0);
>  	if (rc)
>  		goto pdata_exit;
>  
> @@ -76,6 +81,7 @@ static const struct of_device_id ahci_of_match[] = {
>  	{ .compatible = "snps,exynos5440-ahci", },
>  	{ .compatible = "ibm,476gtr-ahci", },
>  	{ .compatible = "snps,dwc-ahci", },
> +	{ .compatible = "hisilicon,hisi-ahci", },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, ahci_of_match);
> 

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