From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Subject: Re: [PATCH V7 5/9] mfd: Add driver for NVIDIA Tegra XUSB Date: Wed, 29 Apr 2015 10:23:48 +0100 Message-ID: <20150429092348.GQ9169@x1> References: <1430174242-29465-1-git-send-email-abrestic@chromium.org> <1430174242-29465-6-git-send-email-abrestic@chromium.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <1430174242-29465-6-git-send-email-abrestic@chromium.org> Sender: linux-kernel-owner@vger.kernel.org To: Andrew Bresticker Cc: Stephen Warren , Thierry Reding , Alexandre Courbot , linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Samuel Ortiz List-Id: devicetree@vger.kernel.org On Mon, 27 Apr 2015, Andrew Bresticker wrote: > Add an MFD driver for the XUSB host complex found on NVIDIA Tegra124 > and later SoCs. >=20 > Signed-off-by: Andrew Bresticker > Cc: Samuel Ortiz > Cc: Lee Jones > --- > New for v7. > --- > drivers/mfd/Kconfig | 7 ++ > drivers/mfd/Makefile | 1 + > drivers/mfd/tegra-xusb.c | 167 +++++++++++++++++++++++++++++++++++++= ++++++++++ > include/soc/tegra/xusb.h | 19 ++++++ > 4 files changed, 194 insertions(+) > create mode 100644 drivers/mfd/tegra-xusb.c > create mode 100644 include/soc/tegra/xusb.h >=20 > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index d5ad04d..61872b4 100644 > --- a/drivers/mfd/Kconfig > +++ b/drivers/mfd/Kconfig > @@ -1430,6 +1430,13 @@ config MFD_STW481X > in various ST Microelectronics and ST-Ericsson embedded > Nomadik series. > =20 > +config MFD_TEGRA_XUSB > + tristate "NVIDIA Tegra XUSB" > + depends on ARCH_TEGRA > + select MFD_CORE > + help > + Support for the XUSB complex found on NVIDIA Tegra124 and later S= oCs. > + > menu "Multimedia Capabilities Port drivers" > depends on ARCH_SA1100 > =20 > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > index 0e5cfeb..7588caf 100644 > --- a/drivers/mfd/Makefile > +++ b/drivers/mfd/Makefile > @@ -181,6 +181,7 @@ obj-$(CONFIG_MFD_HI6421_PMIC) +=3D hi6421-pmic-co= re.o > obj-$(CONFIG_MFD_DLN2) +=3D dln2.o > obj-$(CONFIG_MFD_RT5033) +=3D rt5033.o > obj-$(CONFIG_MFD_SKY81452) +=3D sky81452.o > +obj-$(CONFIG_MFD_TEGRA_XUSB) +=3D tegra-xusb.o > =20 > intel-soc-pmic-objs :=3D intel_soc_pmic_core.o intel_soc_pmic_crc.o > obj-$(CONFIG_INTEL_SOC_PMIC) +=3D intel-soc-pmic.o > diff --git a/drivers/mfd/tegra-xusb.c b/drivers/mfd/tegra-xusb.c > new file mode 100644 > index 0000000..d30d259 > --- /dev/null > +++ b/drivers/mfd/tegra-xusb.c > @@ -0,0 +1,167 @@ > +/* > + * NVIDIA Tegra XUSB MFD driver > + * > + * Copyright (C) 2015 Google, Inc. > + * > + * This program is free software; you can redistribute it and/or mod= ify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > + > +struct tegra_xusb_soc_data { > + struct mfd_cell *devs; > + unsigned int num_devs; > +}; > + > +static struct resource tegra_xhci_resources[] =3D { > + { > + .name =3D "host", > + .flags =3D IORESOURCE_IRQ, > + }, > + { > + .name =3D "xhci", > + .flags =3D IORESOURCE_MEM, > + }, > + { > + .name =3D "ipfs", > + .flags =3D IORESOURCE_MEM, > + }, > +}; > + > +static struct resource tegra_xusb_mbox_resources[] =3D { > + { > + .name =3D "smi", > + .flags =3D IORESOURCE_IRQ, > + }, > +}; DEFINE_RES_IRQ_NAMED() > +static struct mfd_cell tegra124_xusb_devs[] =3D { > + { > + .name =3D "tegra-xhci", > + .of_compatible =3D "nvidia,tegra124-xhci", > + }, > + { > + .name =3D "tegra-xusb-mbox", > + .of_compatible =3D "nvidia,tegra124-xusb-mbox", > + }, > +}; > + > +static const struct tegra_xusb_soc_data tegra124_xusb_data =3D { > + .devs =3D tegra124_xusb_devs, > + .num_devs =3D ARRAY_SIZE(tegra124_xusb_devs), > +}; > + > +static const struct of_device_id tegra_xusb_of_match[] =3D { > + { .compatible =3D "nvidia,tegra124-xusb", .data =3D &tegra124_xusb_= data }, Yuk! Why are you mixing platform data and DT in this way? Why can't you just stick all of this in DT? > + {}, > +}; > + > +MODULE_DEVICE_TABLE(of, tegra_xusb_of_match); > +static struct regmap_config tegra_fpci_regmap_config =3D { > + .reg_bits =3D 32, > + .val_bits =3D 32, > + .reg_stride =3D 4, > +}; > + > +static int tegra_xusb_probe(struct platform_device *pdev) > +{ > + const struct tegra_xusb_soc_data *soc; > + const struct of_device_id *match; > + struct tegra_xusb *xusb; > + struct resource *res; > + void __iomem *fpci_base; > + int irq, ret; > + > + xusb =3D devm_kzalloc(&pdev->dev, sizeof(*xusb), GFP_KERNEL); > + if (!xusb) > + return -ENOMEM; > + platform_set_drvdata(pdev, xusb); > + > + match =3D of_match_node(tegra_xusb_of_match, pdev->dev.of_node); > + soc =3D match->data; > + > + irq =3D platform_get_irq_byname(pdev, "host"); > + if (irq < 0) > + return irq; > + tegra_xhci_resources[0].start =3D irq; > + tegra_xhci_resources[0].end =3D irq; > + > + res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci"); > + if (!res) > + return -ENODEV; > + tegra_xhci_resources[1].start =3D res->start; > + tegra_xhci_resources[1].end =3D res->end; > + > + res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "ipfs"); > + if (!res) > + return -ENODEV; > + tegra_xhci_resources[2].start =3D res->start; > + tegra_xhci_resources[2].end =3D res->end; > + > + soc->devs[0].resources =3D tegra_xhci_resources; > + soc->devs[0].num_resources =3D ARRAY_SIZE(tegra_xhci_resources); > + > + irq =3D platform_get_irq_byname(pdev, "smi"); > + if (irq < 0) > + return irq; > + tegra_xusb_mbox_resources[0].start =3D irq; > + tegra_xusb_mbox_resources[0].end =3D irq; > + > + soc->devs[1].resources =3D tegra_xusb_mbox_resources; > + soc->devs[1].num_resources =3D ARRAY_SIZE(tegra_xusb_mbox_resources= ); > + > + res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "fpci"); > + fpci_base =3D devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(fpci_base)) > + return PTR_ERR(fpci_base); This stuff is not good. Either let MFD handle it with mfd_cells or stick all of this stuff in DT and parse it from the child devices. > + tegra_fpci_regmap_config.max_register =3D res->end - res->start - 3= ; > + xusb->fpci_regs =3D devm_regmap_init_mmio(&pdev->dev, fpci_base, > + &tegra_fpci_regmap_config); > + if (IS_ERR(xusb->fpci_regs)) { > + ret =3D PTR_ERR(xusb->fpci_regs); > + dev_err(&pdev->dev, "Failed to init regmap: %d\n", ret); > + return ret; > + } > + > + ret =3D mfd_add_devices(&pdev->dev, -1, soc->devs, soc->num_devs, > + NULL, 0, NULL); > + if (ret) { > + dev_err(&pdev->dev, "Failed to add MFD devices: %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +static int tegra_xusb_remove(struct platform_device *pdev) > +{ > + mfd_remove_devices(&pdev->dev); > + > + return 0; > +} > + > +static struct platform_driver tegra_xusb_driver =3D { > + .probe =3D tegra_xusb_probe, > + .remove =3D tegra_xusb_remove, > + .driver =3D { > + .name =3D "tegra-xusb", > + .of_match_table =3D tegra_xusb_of_match, > + }, > +}; > +module_platform_driver(tegra_xusb_driver); > + > +MODULE_DESCRIPTION("NVIDIA Tegra XUSB MFD"); > +MODULE_AUTHOR("Andrew Bresticker "); > +MODULE_LICENSE("GPL v2"); > diff --git a/include/soc/tegra/xusb.h b/include/soc/tegra/xusb.h > new file mode 100644 > index 0000000..9d28d90 > --- /dev/null > +++ b/include/soc/tegra/xusb.h > @@ -0,0 +1,19 @@ > +/* > + * Copyright (C) 2014 NVIDIA Corporation > + * Copyright (C) 2014 Google, Inc. > + * > + * This program is free software; you can redistribute it and/or mod= ify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + */ > + > +#ifndef __SOC_TEGRA_XUSB_H__ > +#define __SOC_TEGRA_XUSB_H__ > + > +struct regmap; > + > +struct tegra_xusb { > + struct regmap *fpci_regs; Are you going to add to this? > +}; > + > +#endif /* __SOC_TEGRA_XUSB_H__ */ --=20 Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org =E2=94=82 Open source software for ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog