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multiple-os: add uboot helper

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setup clk for uboot

Change-Id: I1be359821a112d3e171423ee8b33dc84e92c4bd2
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
This commit is contained in:
Jacob Chen
2016-10-31 23:51:28 +08:00
parent ac6e6d50e9
commit 7f0e7d3705
2 changed files with 88 additions and 1 deletions
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2
arch/arm/mach-rockchip/Makefile
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@@ -1,7 +1,7 @@
CFLAGS_platsmp.o := -march=armv7-a
obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip.o
obj-$(CONFIG_PM_SLEEP) += pm.o rk3288_ddr_suspend.o
obj-$(CONFIG_PM_SLEEP) += pm.o rk3288_ddr_suspend.o uboot.o
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
obj-y += embedded/

87
arch/arm/mach-rockchip/uboot.c Normal file
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@@ -0,0 +1,87 @@
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/cacheflush.h>
#include <asm/pgtable.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/jiffies.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
static int uboot_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct clk *reserved_clk;
int i = 0;
/* reserve clock */
while(1) {
reserved_clk = of_clk_get(np, i++);
if (IS_ERR(reserved_clk))
break;
if (clk_prepare_enable(reserved_clk)) {
pr_err("Failed to enable clock for uboot\n");
break;
}
}
/* setup irq */
return 0;
}
static int uboot_remove(struct platform_device *pdev)
{
return 0;
}
static const struct of_device_id uboot_dt_ids[] = {
{ .compatible = "rockchip,uboot" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rk_iommu_dt_ids);
static struct platform_driver uboot_driver = {
.probe = uboot_probe,
.remove = uboot_remove,
.driver = {
.name = "uboot",
.of_match_table = uboot_dt_ids,
},
};
static int __init uboot_init(void)
{
return platform_driver_register(&uboot_driver);
}
static void __exit uboot_exit(void)
{
platform_driver_unregister(&uboot_driver);
}
subsys_initcall(uboot_init);
module_exit(uboot_exit);
MODULE_DESCRIPTION("Uboot Helper for Rockchip");
MODULE_AUTHOR("Jacob Chen <jacob2.chen@rock-chips.com>");
MODULE_ALIAS("platform:rockchip-uboot");
MODULE_LICENSE("GPL v2");