From 0b469f3f4c0e6a0e0b1b60a059600e325a03b6f5 Mon Sep 17 00:00:00 2001 From: Andy Gross Date: Thu, 12 Jun 2014 00:52:06 -0500 Subject: [PATCH 153/182] soc: qcom: tcsr: Add TCSR driver This patch adds support for the TCSR IP block present in Qualcomm processors. Signed-off-by: Andy Gross --- .../devicetree/bindings/soc/qcom/qcom,tcsr.txt | 25 ++++++++ drivers/soc/qcom/Kconfig | 6 ++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/qcom_tcsr.c | 64 ++++++++++++++++++++ include/dt-bindings/soc/qcom,tcsr.h | 19 ++++++ 5 files changed, 115 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt create mode 100644 drivers/soc/qcom/qcom_tcsr.c create mode 100644 include/dt-bindings/soc/qcom,tcsr.h --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt @@ -0,0 +1,25 @@ +QCOM TCSR (Top Control and Status Register) Driver + +The TCSR provides miscellaneous control functions and status registers for +Qualcomm processors. + +Required properties: +- compatible: must contain "qcom,tcsr" for IPQ806x +- reg: Address range for TCSR registers + +Optional properties: +- qcom,usb-ctrl-select : indicates USB port type selection. Please reference + dt-bindings/soc/qcom,tcsr.h for valid USB port selection values. + +Example for IPQ8064: + +#include + + tcsr: tcsr@1a400000 { + compatible = "qcom,tcsr"; + reg = <0x1a400000 0x100>; + + qcom,usb-ctrl-select = ; + }; + + --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -9,3 +9,9 @@ config QCOM_GSBI functions for connecting the underlying serial UART, SPI, and I2C devices to the output pins. +config QCOM_TCSR + tristate "QCOM Top Control and Status Registers" + depends on ARCH_QCOM + help + Say y here to enable TCSR support. The TCSR provides control + functions for various peripherals. --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o +obj-$(CONFIG_QCOM_TCSR) += qcom_tcsr.o --- /dev/null +++ b/drivers/soc/qcom/qcom_tcsr.c @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2014, The Linux foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License rev 2 and + * only rev 2 as published by the free Software foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or fITNESS fOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include + +#define TCSR_USB_PORT_SEL 0xb0 + +static int tcsr_probe(struct platform_device *pdev) +{ + struct resource *res; + const struct device_node *node = pdev->dev.of_node; + void __iomem *base; + u32 val; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (!of_property_read_u32(node, "qcom,usb-ctrl-select", &val)) { + dev_err(&pdev->dev, "setting usb port select = %d\n", val); + writel(val, base + TCSR_USB_PORT_SEL); + } + + return 0; +} + +static const struct of_device_id tcsr_dt_match[] = { + { .compatible = "qcom,tcsr", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, tcsr_dt_match); + +static struct platform_driver tcsr_driver = { + .driver = { + .name = "tcsr", + .owner = THIS_MODULE, + .of_match_table = tcsr_dt_match, + }, + .probe = tcsr_probe, +}; + +module_platform_driver(tcsr_driver); + +MODULE_AUTHOR("Andy Gross "); +MODULE_DESCRIPTION("QCOM TCSR driver"); +MODULE_LICENSE("GPL v2"); --- /dev/null +++ b/include/dt-bindings/soc/qcom,tcsr.h @@ -0,0 +1,19 @@ +/* Copyright (c) 2014, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef __DT_BINDINGS_QCOM_TCSR_H +#define __DT_BINDINGS_QCOM_TCSR_H + +#define TCSR_USB_SELECT_USB3_P0 0x1 +#define TCSR_USB_SELECT_USB3_P1 0x2 +#define TCSR_USB_SELECT_USB3_DUAL 0x3 + +#endif