linux-stable/drivers/clk/ti/interface.c
Tero Kristo 6c0afb5039 clk: ti: convert to use proper register definition for all accesses
Currently, TI clock driver uses an encapsulated struct that is cast into
a void pointer to store all register addresses. This can be considered
as rather nasty hackery, and prevents from expanding the register
address field also. Instead, replace all the code to use proper struct
in place for this, which contains all the previously used data.

This patch is rather large as it is touching multiple files, but this
can't be split up as we need to avoid any boot breakage.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
2017-03-08 13:06:15 +02:00

183 lines
5 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(NULL, &clk_hw->hw, name);
if (IS_ERR(clk))
kfree(clk_hw);
else
omap2_init_clk_hw_omap_clocks(&clk_hw->hw);
return clk;
}
#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS)
struct clk *ti_clk_register_interface(struct ti_clk *setup)
{
const struct clk_hw_omap_ops *ops = &clkhwops_iclk_wait;
struct clk_omap_reg reg;
struct ti_clk_gate *gate;
gate = setup->data;
reg.index = gate->module;
reg.offset = gate->reg;
reg.ptr = NULL;
if (gate->flags & CLKF_NO_WAIT)
ops = &clkhwops_iclk;
if (gate->flags & CLKF_HSOTGUSB)
ops = &clkhwops_omap3430es2_iclk_hsotgusb_wait;
if (gate->flags & CLKF_DSS)
ops = &clkhwops_omap3430es2_iclk_dss_usbhost_wait;
if (gate->flags & CLKF_SSI)
ops = &clkhwops_omap3430es2_iclk_ssi_wait;
if (gate->flags & CLKF_AM35XX)
ops = &clkhwops_am35xx_ipss_wait;
return _register_interface(NULL, setup->name, gate->parent,
&reg, gate->bit_shift, ops);
}
#endif
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, &reg))
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("%s must have a parent\n", node->name);
return;
}
clk = _register_interface(NULL, node->name, parent_name, &reg,
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