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Date: Tue, 31 Mar 2015 11:46:52 +0530 From: Kishon Vijay Abraham I <kishon@...com> To: Arun Ramamurthy <arun.ramamurthy@...adcom.com>, Dmitry Torokhov <dtor@...gle.com> CC: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>, Mark Rutland <mark.rutland@....com>, Ian Campbell <ijc+devicetree@...lion.org.uk>, Kumar Gala <galak@...eaurora.org>, Arnd Bergmann <arnd@...db.de>, <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <bcm-kernel-feedback-list@...adcom.com>, <linux-kernel@...r.kernel.org>, Anatol Pomazau <anatol@...gle.com>, Jonathan Richardson <jonathar@...adcom.com>, Scott Branden <sbranden@...adcom.com>, Ray Jui <rjui@...adcom.com> Subject: Re: [PATCH v1 3/3] phy: cygnus-usbphy: Add Broadcom Cygnus USB phy driver Hi, On Thursday 26 March 2015 05:36 AM, Arun Ramamurthy wrote: > > > On 15-03-25 05:01 PM, Kishon Vijay Abraham I wrote: >> >> >> On Thursday 26 March 2015 04:12 AM, Dmitry Torokhov wrote: >>> Hi Kishon, >>> >>> On Thu, Mar 26, 2015 at 03:58:50AM +0530, Kishon Vijay Abraham I wrote: >>>> Hi, >>>> >>>> On Saturday 21 March 2015 02:55 AM, Arun Ramamurthy wrote: >>>>> +struct bcm_phy_driver { >>>>> + void __iomem *usbphy_regs; >>>>> + void __iomem *usb2h_idm_regs; >>>>> + void __iomem *usb2d_idm_regs; >>>>> + struct bcm_phy_instance *ports[MAX_PHY_PORTS]; >>>> >>>> er.. can't we allocate this dynamically? >>> >>> The chip has support for only 3 phys, so I believe allocating array of 3 >>> pointers is simplest. >>> >>> [...] >>> >>>>> + >>>>> +static struct phy *bcm_usb_phy_xlate(struct device *dev, >>>>> + struct of_phandle_args *args) >>>>> +{ >>>>> + struct bcm_phy_driver *phy_driver = dev_get_drvdata(dev); >>>>> + struct bcm_phy_instance *port = NULL; >>>>> + int i; >>>>> + >>>>> + if (!phy_driver) >>>>> + return ERR_PTR(-EINVAL); >>>>> + >>>>> + if (WARN_ON(args->args_count != 1)) >>>>> + return ERR_PTR(-EINVAL); >>>>> + >>>>> + if (WARN_ON(args->args[0] < 0 || args->args[0] > 1)) >>>>> + return ERR_PTR(-EINVAL); >>>>> + >>>>> + for (i = 0; i < ARRAY_SIZE(phy_driver->ports); i++) { >>>>> + struct bcm_phy_instance *p = phy_driver->ports[i]; >>>>> + >>>>> + if (p && p->generic_phy->dev.of_node == args->np) { >>>>> + port = p; >>>>> + break; >>>>> + } >>>>> + } >>>>> + >>>>> + if (!port) { >>>>> + dev_err(dev, "Failed to locate phy %s\n", args->np->name); >>>>> + return ERR_PTR(-EINVAL); >>>>> + } >>>>> + >>>>> + port->host_mode = args->args[0]; >>>>> + >>>>> + return port->generic_phy; >>>>> +} >>>> >>>> The xlate function here shouldn't be needed at all. Use of_phy_simple_xlate >>>> instead. >>> >>> of_phy_simple_xlate() will not allow specifying host vs device mode when >>> requesting phy though... >> >> indeed! >> > Kishon, to confirm , are the xlate function and the MAX_PHY_PORTS ok or are you > recommending changes? Thanks as Dmitry pointed out you'll still need your own implementation of xlate. Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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