forked from luck/tmp_suning_uos_patched
9cfad9bc47
* cleanup-clk-h-includes: (62 commits) clk: Remove clk.h from clk-provider.h clk: h8300: Remove clk.h and clkdev.h includes clk: at91: Include clk.h and slab.h clk: ti: Switch clk-provider.h include to clk.h clk: pistachio: Include clk.h clk: ingenic: Include clk.h clk: si570: Include clk.h clk: moxart: Include clk.h clk: cdce925: Include clk.h clk: Include clk.h in clk.c clk: zynq: Include clk.h clk: ti: Include clk.h clk: sunxi: Include clk.h and remove unused clkdev.h includes clk: st: Include clk.h clk: qcom: Include clk.h clk: highbank: Include clk.h clk: bcm: Include clk.h clk: versatile: Remove clk.h and clkdev.h includes clk: ux500: Remove clk.h and clkdev.h includes clk: tegra: Properly include clk.h ...
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
|
|
* TWL6040 clock module driver for OMAP4 McPDM functional clock
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments Inc.
|
|
* Peter Ujfalusi <peter.ujfalusi@ti.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mfd/twl6040.h>
|
|
#include <linux/clk-provider.h>
|
|
|
|
struct twl6040_clk {
|
|
struct twl6040 *twl6040;
|
|
struct device *dev;
|
|
struct clk_hw mcpdm_fclk;
|
|
struct clk *clk;
|
|
int enabled;
|
|
};
|
|
|
|
static int twl6040_bitclk_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct twl6040_clk *twl6040_clk = container_of(hw, struct twl6040_clk,
|
|
mcpdm_fclk);
|
|
return twl6040_clk->enabled;
|
|
}
|
|
|
|
static int twl6040_bitclk_prepare(struct clk_hw *hw)
|
|
{
|
|
struct twl6040_clk *twl6040_clk = container_of(hw, struct twl6040_clk,
|
|
mcpdm_fclk);
|
|
int ret;
|
|
|
|
ret = twl6040_power(twl6040_clk->twl6040, 1);
|
|
if (!ret)
|
|
twl6040_clk->enabled = 1;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void twl6040_bitclk_unprepare(struct clk_hw *hw)
|
|
{
|
|
struct twl6040_clk *twl6040_clk = container_of(hw, struct twl6040_clk,
|
|
mcpdm_fclk);
|
|
int ret;
|
|
|
|
ret = twl6040_power(twl6040_clk->twl6040, 0);
|
|
if (!ret)
|
|
twl6040_clk->enabled = 0;
|
|
}
|
|
|
|
static const struct clk_ops twl6040_mcpdm_ops = {
|
|
.is_enabled = twl6040_bitclk_is_enabled,
|
|
.prepare = twl6040_bitclk_prepare,
|
|
.unprepare = twl6040_bitclk_unprepare,
|
|
};
|
|
|
|
static struct clk_init_data wm831x_clkout_init = {
|
|
.name = "mcpdm_fclk",
|
|
.ops = &twl6040_mcpdm_ops,
|
|
.flags = CLK_IS_ROOT,
|
|
};
|
|
|
|
static int twl6040_clk_probe(struct platform_device *pdev)
|
|
{
|
|
struct twl6040 *twl6040 = dev_get_drvdata(pdev->dev.parent);
|
|
struct twl6040_clk *clkdata;
|
|
|
|
clkdata = devm_kzalloc(&pdev->dev, sizeof(*clkdata), GFP_KERNEL);
|
|
if (!clkdata)
|
|
return -ENOMEM;
|
|
|
|
clkdata->dev = &pdev->dev;
|
|
clkdata->twl6040 = twl6040;
|
|
|
|
clkdata->mcpdm_fclk.init = &wm831x_clkout_init;
|
|
clkdata->clk = devm_clk_register(&pdev->dev, &clkdata->mcpdm_fclk);
|
|
if (IS_ERR(clkdata->clk))
|
|
return PTR_ERR(clkdata->clk);
|
|
|
|
platform_set_drvdata(pdev, clkdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver twl6040_clk_driver = {
|
|
.driver = {
|
|
.name = "twl6040-clk",
|
|
},
|
|
.probe = twl6040_clk_probe,
|
|
};
|
|
|
|
module_platform_driver(twl6040_clk_driver);
|
|
|
|
MODULE_DESCRIPTION("TWL6040 clock driver for McPDM functional clock");
|
|
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
|
|
MODULE_ALIAS("platform:twl6040-clk");
|
|
MODULE_LICENSE("GPL");
|