On Fri, Oct 4, 2013 at 6:03 AM, Jingoo Han <jg1.han@xxxxxxxxxxx> wrote: > On Thursday, October 03, 2013 8:32 PM, Bartlomiej Zolnierkiewicz wrote: >> On Tuesday, October 01, 2013 12:03:01 PM Yuvaraj Kumar C D wrote: >> > Exynos5250 contains one Synopsys AHCI SATA controller.The avalaible >> > ahci_platform driver is not sufficient to handle the AHCI PHY and PHY >> > clock related initialization. >> > >> > This patch adds exynos specific ahci sata driver,contained the exynos >> > specific initialized codes, re-use the generic ahci_platform driver, and >> > keep the generic ahci_platform driver clean as much as possible. >> > >> > This patch depends on the below patch >> > [1].drivers: phy: add generic PHY framework >> > by Kishon Vijay Abraham I<kishon@xxxxxx> >> > >> > Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@xxxxxxxxxxx> >> > --- >> > drivers/ata/Kconfig | 9 ++ >> > drivers/ata/Makefile | 1 + >> > drivers/ata/ahci_exynos.c | 226 +++++++++++++++++++++++++++++++++++++++++++++ >> > 3 files changed, 236 insertions(+) >> > create mode 100644 drivers/ata/ahci_exynos.c >> > > > > [.....] > >> > + priv->phy = devm_phy_get(dev , "sata-phy"); >> > + if (IS_ERR(priv->phy)) >> > + return PTR_ERR(priv->phy); > > [.....] > >> Also please take a look at the following patch: >> >> https://lkml.org/lkml/2013/9/19/173 >> >> it adds PHY support to ahci_platform driver, maybe it can be used >> for your needs as well. > > I also agree with Bartlomiej Zolnierkiewicz's opinion. > 'ahci_exynos.c' just calls PHY API, without any additional control > for Exynos AHCI IP. In addition to PHY handling,it also deals with the special clock sclk_sata which is not dealt in ahci_platform.c(certainly exynos specific). Morever there is a wrapper driver to handle the platform specific things for the sata.Please refer the patch[1] [1]ata: ti_sata: Add Texas Instruments SATA Wrapper driver https://lkml.org/lkml/2013/9/19/166 [2]ahci_imx: add ahci sata support on imx platforms I think, if we have platform specific driver like ahci_xxx.c , it would be better to handle the sata PHY in ahci_xxx.c so that we can retain and re-use the ahci_platform.c as it is. Further comments will be much appreciated. > > Best regards, > Jingoo Han > >> >> > + ret = phy_init(priv->phy); >> > + if (ret < 0) { >> > + dev_err(dev, "failed to init SATA PHY\n"); >> > + return ret; >> > + } >> > + > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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