diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0084-soc-qcom-Add-GSBI-driver.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0084-soc-qcom-Add-GSBI-driver.patch | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0084-soc-qcom-Add-GSBI-driver.patch b/target/linux/ipq806x/patches/0084-soc-qcom-Add-GSBI-driver.patch new file mode 100644 index 0000000000..f52255826c --- /dev/null +++ b/target/linux/ipq806x/patches/0084-soc-qcom-Add-GSBI-driver.patch @@ -0,0 +1,162 @@ +From a2f0fc20ea49e5dbbdbb21444683ea760fbdd38f Mon Sep 17 00:00:00 2001 +From: Andy Gross <agross@codeaurora.org> +Date: Thu, 24 Apr 2014 11:31:21 -0500 +Subject: [PATCH 084/182] soc: qcom: Add GSBI driver + +The GSBI (General Serial Bus Interface) driver controls the overarching +configuration of the shared serial bus infrastructure on APQ8064, IPQ8064, and +earlier QCOM processors. The GSBI supports UART, I2C, SPI, and UIM +functionality in various combinations. + +Signed-off-by: Andy Gross <agross@codeaurora.org> +Signed-off-by: Kumar Gala <galak@codeaurora.org> +--- + drivers/soc/Kconfig | 2 + + drivers/soc/Makefile | 5 +++ + drivers/soc/qcom/Kconfig | 11 ++++++ + drivers/soc/qcom/Makefile | 1 + + drivers/soc/qcom/qcom_gsbi.c | 84 ++++++++++++++++++++++++++++++++++++++++++ + 5 files changed, 103 insertions(+) + create mode 100644 drivers/soc/Makefile + create mode 100644 drivers/soc/qcom/Kconfig + create mode 100644 drivers/soc/qcom/Makefile + create mode 100644 drivers/soc/qcom/qcom_gsbi.c + +diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig +index 339baa8..c854385 100644 +--- a/drivers/soc/Kconfig ++++ b/drivers/soc/Kconfig +@@ -1,3 +1,5 @@ + menu "SOC (System On Chip) specific Drivers" + ++source "drivers/soc/qcom/Kconfig" ++ + endmenu +diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile +new file mode 100644 +index 0000000..0f7c447 +--- /dev/null ++++ b/drivers/soc/Makefile +@@ -0,0 +1,5 @@ ++# ++# Makefile for the Linux Kernel SOC specific device drivers. ++# ++ ++obj-$(CONFIG_ARCH_QCOM) += qcom/ +diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig +new file mode 100644 +index 0000000..7bd2c94 +--- /dev/null ++++ b/drivers/soc/qcom/Kconfig +@@ -0,0 +1,11 @@ ++# ++# QCOM Soc drivers ++# ++config QCOM_GSBI ++ tristate "QCOM General Serial Bus Interface" ++ depends on ARCH_QCOM ++ help ++ Say y here to enable GSBI support. The GSBI provides control ++ functions for connecting the underlying serial UART, SPI, and I2C ++ devices to the output pins. ++ +diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile +new file mode 100644 +index 0000000..4389012 +--- /dev/null ++++ b/drivers/soc/qcom/Makefile +@@ -0,0 +1 @@ ++obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o +diff --git a/drivers/soc/qcom/qcom_gsbi.c b/drivers/soc/qcom/qcom_gsbi.c +new file mode 100644 +index 0000000..061dd06 +--- /dev/null ++++ b/drivers/soc/qcom/qcom_gsbi.c +@@ -0,0 +1,84 @@ ++/* ++ * 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 GSBI_CTRL_REG 0x0000 ++#define GSBI_PROTOCOL_SHIFT 4 ++ ++static int gsbi_probe(struct platform_device *pdev) ++{ ++ struct device_node *node = pdev->dev.of_node; ++ struct resource *res; ++ void __iomem *base; ++ struct clk *hclk; ++ u32 mode, crci = 0; ++ ++ 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,mode", &mode)) { ++ dev_err(&pdev->dev, "missing mode configuration\n"); ++ return -EINVAL; ++ } ++ ++ /* not required, so default to 0 if not present */ ++ of_property_read_u32(node, "qcom,crci", &crci); ++ ++ dev_info(&pdev->dev, "GSBI port protocol: %d crci: %d\n", mode, crci); ++ ++ hclk = devm_clk_get(&pdev->dev, "iface"); ++ if (IS_ERR(hclk)) ++ return PTR_ERR(hclk); ++ ++ clk_prepare_enable(hclk); ++ ++ writel_relaxed((mode << GSBI_PROTOCOL_SHIFT) | crci, ++ base + GSBI_CTRL_REG); ++ ++ /* make sure the gsbi control write is not reordered */ ++ wmb(); ++ ++ clk_disable_unprepare(hclk); ++ ++ return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); ++} ++ ++static const struct of_device_id gsbi_dt_match[] = { ++ { .compatible = "qcom,gsbi-v1.0.0", }, ++}; ++ ++MODULE_DEVICE_TABLE(of, gsbi_dt_match); ++ ++static struct platform_driver gsbi_driver = { ++ .driver = { ++ .name = "gsbi", ++ .owner = THIS_MODULE, ++ .of_match_table = gsbi_dt_match, ++ }, ++ .probe = gsbi_probe, ++}; ++ ++module_platform_driver(gsbi_driver); ++ ++MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>"); ++MODULE_DESCRIPTION("QCOM GSBI driver"); ++MODULE_LICENSE("GPL v2"); +-- +1.7.10.4 + |