On Mon, 04 May 2015, Andrew Bresticker wrote: > Add an MFD driver for the XUSB host complex found on NVIDIA Tegra124 > and later SoCs.
What else does it do besides USB? > Signed-off-by: Andrew Bresticker <[email protected]> > Cc: Samuel Ortiz <[email protected]> > Cc: Lee Jones <[email protected]> > --- > Changes from v7: > - Have child nodes get non-shared memory and interrupts from DT. > - Use of_platform_populate rather than mfd_add_devices. > - Get rid of struct tegra_xusb. > New for v7. > --- > drivers/mfd/Kconfig | 7 +++++ > drivers/mfd/Makefile | 1 + > drivers/mfd/tegra-xusb.c | 75 > ++++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 83 insertions(+) > create mode 100644 drivers/mfd/tegra-xusb.c > > 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. > > +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 SoCs. > + > menu "Multimedia Capabilities Port drivers" > depends on ARCH_SA1100 > > 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-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o > obj-$(CONFIG_MFD_DLN2) += dln2.o > obj-$(CONFIG_MFD_RT5033) += rt5033.o > obj-$(CONFIG_MFD_SKY81452) += sky81452.o > +obj-$(CONFIG_MFD_TEGRA_XUSB) += tegra-xusb.o > > intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o > obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o > diff --git a/drivers/mfd/tegra-xusb.c b/drivers/mfd/tegra-xusb.c > new file mode 100644 > index 0000000..e11fa23 > --- /dev/null > +++ b/drivers/mfd/tegra-xusb.c > @@ -0,0 +1,75 @@ > +/* > + * NVIDIA Tegra XUSB MFD driver > + * > + * Copyright (C) 2015 Google, Inc. > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + */ > + > +#include <linux/interrupt.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/mfd/core.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > +#include <linux/slab.h> > + > +static const struct of_device_id tegra_xusb_of_match[] = { > + { .compatible = "nvidia,tegra124-xusb", }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, tegra_xusb_of_match); If you're not using this to patch on, I'd prefer you place it next to where it's first used i.e. down at the bottom of the file. > +static struct regmap_config tegra_fpci_regmap_config = { > + .reg_bits = 32, > + .val_bits = 32, > + .reg_stride = 4, > +}; > + > +static int tegra_xusb_probe(struct platform_device *pdev) > +{ > + struct resource *res; > + struct regmap *fpci_regs; > + void __iomem *fpci_base; > + int ret; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + fpci_base = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(fpci_base)) > + return PTR_ERR(fpci_base); > + > + tegra_fpci_regmap_config.max_register = res->end - res->start - 3; > + fpci_regs = devm_regmap_init_mmio(&pdev->dev, fpci_base, > + &tegra_fpci_regmap_config); > + if (IS_ERR(fpci_regs)) { > + ret = PTR_ERR(fpci_regs); > + dev_err(&pdev->dev, "Failed to init regmap: %d\n", ret); > + return ret; > + } > + platform_set_drvdata(pdev, fpci_regs); > + > + ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); > + if (ret) { > + dev_err(&pdev->dev, "Failed to add sub-devices: %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +static struct platform_driver tegra_xusb_driver = { > + .probe = tegra_xusb_probe, No .remove()? > + .driver = { > + .name = "tegra-xusb", > + .of_match_table = tegra_xusb_of_match, > + }, > +}; > +module_platform_driver(tegra_xusb_driver); > + > +MODULE_DESCRIPTION("NVIDIA Tegra XUSB MFD"); > +MODULE_AUTHOR("Andrew Bresticker <[email protected]>"); > +MODULE_LICENSE("GPL v2"); -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
