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clk: ux500: Initial support for abx500 clock driver

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The abx500 clock driver is a platform driver which will be initialized
during arch init. The platform device shall be added from the ab-core
driver as a mfd child device to maintain correct boot sequence.

Depending on what ab version we use, different clock definitions will
be added.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Ulf Hansson 2012-11-22 11:35:39 +01:00 committed by Mike Turquette
parent b70e6d009a
commit 45228ef322
2 changed files with 76 additions and 0 deletions
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3
drivers/clk/ux500/Makefile
View File

@ -10,3 +10,6 @@ obj-y += clk-prcmu.o
obj-y += u8500_clk.o
obj-y += u9540_clk.o
obj-y += u8540_clk.o
# ABX500 clock driver
obj-y += abx500-clk.o

73
drivers/clk/ux500/abx500-clk.c Normal file
View File

@ -0,0 +1,73 @@
/*
* abx500 clock implementation for ux500 platform.
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/mfd/abx500/ab8500.h>
/* TODO: Add clock implementations here */
/* Clock definitions for ab8500 */
static int ab8500_reg_clks(struct device *dev)
{
return 0;
}
/* Clock definitions for ab8540 */
static int ab8540_reg_clks(struct device *dev)
{
return 0;
}
/* Clock definitions for ab9540 */
static int ab9540_reg_clks(struct device *dev)
{
return 0;
}
static int __devinit abx500_clk_probe(struct platform_device *pdev)
{
struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
int ret;
if (is_ab8500(parent) || is_ab8505(parent)) {
ret = ab8500_reg_clks(&pdev->dev);
} else if (is_ab8540(parent)) {
ret = ab8540_reg_clks(&pdev->dev);
} else if (is_ab9540(parent)) {
ret = ab9540_reg_clks(&pdev->dev);
} else {
dev_err(&pdev->dev, "non supported plf id\n");
return -ENODEV;
}
return ret;
}
static struct platform_driver abx500_clk_driver = {
.driver = {
.name = "abx500-clk",
.owner = THIS_MODULE,
},
.probe = abx500_clk_probe,
};
static int __init abx500_clk_init(void)
{
return platform_driver_register(&abx500_clk_driver);
}
arch_initcall(abx500_clk_init);
MODULE_AUTHOR("Ulf Hansson <ulf.hansson@linaro.org");
MODULE_DESCRIPTION("ABX500 clk driver");
MODULE_LICENSE("GPL v2");