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From 0b469f3f4c0e6a0e0b1b60a059600e325a03b6f5 Mon Sep 17 00:00:00 2001
From: Andy Gross <agross@codeaurora.org>
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 <agross@codeaurora.org>
---
.../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 <dt-bindings/soc/qcom,tcsr.h>
+
+ tcsr: tcsr@1a400000 {
+ compatible = "qcom,tcsr";
+ reg = <0x1a400000 0x100>;
+
+ qcom,usb-ctrl-select = <TCSR_USB_SELECT_USB3_DUAL>;
+ };
+
+
--- 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 <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#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 <agross@codeaurora.org>");
+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
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