target/linux/ipq806x/patches/0153-soc-qcom-tcsr-Add-TCSR-driver.patch

   1 From 0b469f3f4c0e6a0e0b1b60a059600e325a03b6f5 Mon Sep 17 00:00:00 2001
   2 From: Andy Gross <agross@codeaurora.org>
   3 Date: Thu, 12 Jun 2014 00:52:06 -0500
   4 Subject: [PATCH 153/182] soc: qcom: tcsr: Add TCSR driver
   5
   6 This patch adds support for the TCSR IP block present in Qualcomm processors.
   7
   8 Signed-off-by: Andy Gross <agross@codeaurora.org>
   9 ---
  10  .../devicetree/bindings/soc/qcom/qcom,tcsr.txt     |   25 ++++++++
  11  drivers/soc/qcom/Kconfig                           |    6 ++
  12  drivers/soc/qcom/Makefile                          |    1 +
  13  drivers/soc/qcom/qcom_tcsr.c                       |   64 ++++++++++++++++++++
  14  include/dt-bindings/soc/qcom,tcsr.h                |   19 ++++++
  15  5 files changed, 115 insertions(+)
  16  create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt
  17  create mode 100644 drivers/soc/qcom/qcom_tcsr.c
  18  create mode 100644 include/dt-bindings/soc/qcom,tcsr.h
  19
  20 --- /dev/null
  21 +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt
  22 @@ -0,0 +1,25 @@
  23 +QCOM TCSR (Top Control and Status Register) Driver
  24 +
  25 +The TCSR provides miscellaneous control functions and status registers for
  26 +Qualcomm processors.
  27 +
  28 +Required properties:
  29 +- compatible: must contain "qcom,tcsr" for IPQ806x
  30 +- reg: Address range for TCSR registers
  31 +
  32 +Optional properties:
  33 +- qcom,usb-ctrl-select : indicates USB port type selection.  Please reference
  34 +  dt-bindings/soc/qcom,tcsr.h for valid USB port selection values.
  35 +
  36 +Example for IPQ8064:
  37 +
  38 +#include <dt-bindings/soc/qcom,tcsr.h>
  39 +
  40 +               tcsr: tcsr@1a400000 {
  41 +                       compatible = "qcom,tcsr";
  42 +                       reg = <0x1a400000 0x100>;
  43 +
  44 +                       qcom,usb-ctrl-select = <TCSR_USB_SELECT_USB3_DUAL>;
  45 +               };
  46 +
  47 +
  48 --- a/drivers/soc/qcom/Kconfig
  49 +++ b/drivers/soc/qcom/Kconfig
  50 @@ -9,3 +9,9 @@ config QCOM_GSBI
  51            functions for connecting the underlying serial UART, SPI, and I2C
  52            devices to the output pins.
  53
  54 +config QCOM_TCSR
  55 +        tristate "QCOM Top Control and Status Registers"
  56 +        depends on ARCH_QCOM
  57 +        help
  58 +          Say y here to enable TCSR support.  The TCSR provides control
  59 +          functions for various peripherals.
  60 --- a/drivers/soc/qcom/Makefile
  61 +++ b/drivers/soc/qcom/Makefile
  62 @@ -1 +1,2 @@
  63  obj-$(CONFIG_QCOM_GSBI)        +=      qcom_gsbi.o
  64 +obj-$(CONFIG_QCOM_TCSR)        +=      qcom_tcsr.o
  65 --- /dev/null
  66 +++ b/drivers/soc/qcom/qcom_tcsr.c
  67 @@ -0,0 +1,64 @@
  68 +/*
  69 + * Copyright (c) 2014, The Linux foundation. All rights reserved.
  70 + *
  71 + * This program is free software; you can redistribute it and/or modify
  72 + * it under the terms of the GNU General Public License rev 2 and
  73 + * only rev 2 as published by the free Software foundation.
  74 + *
  75 + * This program is distributed in the hope that it will be useful,
  76 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  77 + * MERCHANTABILITY or fITNESS fOR A PARTICULAR PURPOSE.  See the
  78 + * GNU General Public License for more details.
  79 + */
  80 +
  81 +#include <linux/clk.h>
  82 +#include <linux/err.h>
  83 +#include <linux/io.h>
  84 +#include <linux/module.h>
  85 +#include <linux/of.h>
  86 +#include <linux/of_platform.h>
  87 +#include <linux/platform_device.h>
  88 +
  89 +#define TCSR_USB_PORT_SEL      0xb0
  90 +
  91 +static int tcsr_probe(struct platform_device *pdev)
  92 +{
  93 +       struct resource *res;
  94 +       const struct device_node *node = pdev->dev.of_node;
  95 +       void __iomem *base;
  96 +       u32 val;
  97 +
  98 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  99 +       base = devm_ioremap_resource(&pdev->dev, res);
 100 +       if (IS_ERR(base))
 101 +               return PTR_ERR(base);
 102 +
 103 +       if (!of_property_read_u32(node, "qcom,usb-ctrl-select", &val)) {
 104 +               dev_err(&pdev->dev, "setting usb port select = %d\n", val);
 105 +               writel(val, base + TCSR_USB_PORT_SEL);
 106 +       }
 107 +
 108 +       return 0;
 109 +}
 110 +
 111 +static const struct of_device_id tcsr_dt_match[] = {
 112 +       { .compatible = "qcom,tcsr", },
 113 +       { },
 114 +};
 115 +
 116 +MODULE_DEVICE_TABLE(of, tcsr_dt_match);
 117 +
 118 +static struct platform_driver tcsr_driver = {
 119 +       .driver = {
 120 +               .name           = "tcsr",
 121 +               .owner          = THIS_MODULE,
 122 +               .of_match_table = tcsr_dt_match,
 123 +       },
 124 +       .probe = tcsr_probe,
 125 +};
 126 +
 127 +module_platform_driver(tcsr_driver);
 128 +
 129 +MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
 130 +MODULE_DESCRIPTION("QCOM TCSR driver");
 131 +MODULE_LICENSE("GPL v2");
 132 --- /dev/null
 133 +++ b/include/dt-bindings/soc/qcom,tcsr.h
 134 @@ -0,0 +1,19 @@
 135 +/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
 136 + *
 137 + * This program is free software; you can redistribute it and/or modify
 138 + * it under the terms of the GNU General Public License version 2 and
 139 + * only version 2 as published by the Free Software Foundation.
 140 + *
 141 + * This program is distributed in the hope that it will be useful,
 142 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
 143 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 144 + * GNU General Public License for more details.
 145 + */
 146 +#ifndef __DT_BINDINGS_QCOM_TCSR_H
 147 +#define __DT_BINDINGS_QCOM_TCSR_H
 148 +
 149 +#define TCSR_USB_SELECT_USB3_P0                0x1
 150 +#define TCSR_USB_SELECT_USB3_P1                0x2
 151 +#define TCSR_USB_SELECT_USB3_DUAL      0x3
 152 +
 153 +#endif