150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
|
|
* OMAP interface clock support
|
|
*
|
|
* Copyright (C) 2013 Texas Instruments, Inc.
|
|
*
|
|
* Tero Kristo <t-kristo@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 "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; 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-provider.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/clk/ti.h>
|
|
#include "clock.h"
|
|
|
|
#undef pr_fmt
|
|
#define pr_fmt(fmt) "%s: " fmt, __func__
|
|
|
|
static const struct clk_ops ti_interface_clk_ops = {
|
|
.init = &omap2_init_clk_clkdm,
|
|
.enable = &omap2_dflt_clk_enable,
|
|
.disable = &omap2_dflt_clk_disable,
|
|
.is_enabled = &omap2_dflt_clk_is_enabled,
|
|
};
|
|
|
|
static struct clk *_register_interface(struct device *dev, const char *name,
|
|
const char *parent_name,
|
|
struct clk_omap_reg *reg, u8 bit_idx,
|
|
const struct clk_hw_omap_ops *ops)
|
|
{
|
|
struct clk_init_data init = { NULL };
|
|
struct clk_hw_omap *clk_hw;
|
|
struct clk *clk;
|
|
|
|
clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
|
|
if (!clk_hw)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
clk_hw->hw.init = &init;
|
|
clk_hw->ops = ops;
|
|
memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
|
|
clk_hw->enable_bit = bit_idx;
|
|
|
|
init.name = name;
|
|
init.ops = &ti_interface_clk_ops;
|
|
init.flags = 0;
|
|
|
|
init.num_parents = 1;
|
|
init.parent_names = &parent_name;
|
|
|
|
clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
|
|
|
|
if (IS_ERR(clk))
|
|
kfree(clk_hw);
|
|
|
|
return clk;
|
|
}
|
|
|
|
static void __init _of_ti_interface_clk_setup(struct device_node *node,
|
|
const struct clk_hw_omap_ops *ops)
|
|
{
|
|
struct clk *clk;
|
|
const char *parent_name;
|
|
struct clk_omap_reg reg;
|
|
u8 enable_bit = 0;
|
|
u32 val;
|
|
|
|
if (ti_clk_get_reg_addr(node, 0, ®))
|
|
return;
|
|
|
|
if (!of_property_read_u32(node, "ti,bit-shift", &val))
|
|
enable_bit = val;
|
|
|
|
parent_name = of_clk_get_parent_name(node, 0);
|
|
if (!parent_name) {
|
|
pr_err("%pOFn must have a parent\n", node);
|
|
return;
|
|
}
|
|
|
|
clk = _register_interface(NULL, node->name, parent_name, ®,
|
|
enable_bit, ops);
|
|
|
|
if (!IS_ERR(clk))
|
|
of_clk_add_provider(node, of_clk_src_simple_get, clk);
|
|
}
|
|
|
|
static void __init of_ti_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
|
|
}
|
|
CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
|
|
of_ti_interface_clk_setup);
|
|
|
|
static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node, &clkhwops_iclk);
|
|
}
|
|
CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
|
|
of_ti_no_wait_interface_clk_setup);
|
|
|
|
#ifdef CONFIG_ARCH_OMAP3
|
|
static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node,
|
|
&clkhwops_omap3430es2_iclk_hsotgusb_wait);
|
|
}
|
|
CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
|
|
of_ti_hsotgusb_interface_clk_setup);
|
|
|
|
static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node,
|
|
&clkhwops_omap3430es2_iclk_dss_usbhost_wait);
|
|
}
|
|
CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
|
|
of_ti_dss_interface_clk_setup);
|
|
|
|
static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
|
|
}
|
|
CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
|
|
of_ti_ssi_interface_clk_setup);
|
|
|
|
static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
|
|
}
|
|
CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
|
|
of_ti_am35xx_interface_clk_setup);
|
|
#endif
|
|
|
|
#ifdef CONFIG_SOC_OMAP2430
|
|
static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
|
|
{
|
|
_of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
|
|
}
|
|
CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
|
|
of_ti_omap2430_interface_clk_setup);
|
|
#endif
|