clk: samsung: Define a common samsung_clk_register_pll()

This patch defines a common samsung_clk_register_pll()
Since pll2550 & pll35xx and pll2650 & pll36xx have exactly same clk ops
implementation, added pll2550 and pll2650 also.

Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Yadwinder Singh Brar 2013-06-11 15:01:07 +05:30 committed by Mike Turquette
parent 079dbead49
commit 07dc76fa61
3 changed files with 125 additions and 0 deletions
drivers/clk/samsung

View File

@ -17,6 +17,7 @@ struct samsung_clk_pll {
struct clk_hw hw;
void __iomem *lock_reg;
void __iomem *con_reg;
enum samsung_pll_type type;
};
#define to_clk_pll(_hw) container_of(_hw, struct samsung_clk_pll, hw)
@ -412,3 +413,72 @@ struct clk * __init samsung_clk_register_pll2550x(const char *name,
return clk;
}
static void __init _samsung_clk_register_pll(struct samsung_pll_clock *pll_clk,
void __iomem *base)
{
struct samsung_clk_pll *pll;
struct clk *clk;
struct clk_init_data init;
int ret;
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll) {
pr_err("%s: could not allocate pll clk %s\n",
__func__, pll_clk->name);
return;
}
init.name = pll_clk->name;
init.flags = pll_clk->flags;
init.parent_names = &pll_clk->parent_name;
init.num_parents = 1;
switch (pll_clk->type) {
/* clk_ops for 35xx and 2550 are similar */
case pll_35xx:
case pll_2550:
init.ops = &samsung_pll35xx_clk_ops;
break;
/* clk_ops for 36xx and 2650 are similar */
case pll_36xx:
case pll_2650:
init.ops = &samsung_pll36xx_clk_ops;
break;
default:
pr_warn("%s: Unknown pll type for pll clk %s\n",
__func__, pll_clk->name);
}
pll->hw.init = &init;
pll->type = pll_clk->type;
pll->lock_reg = base + pll_clk->lock_offset;
pll->con_reg = base + pll_clk->con_offset;
clk = clk_register(NULL, &pll->hw);
if (IS_ERR(clk)) {
pr_err("%s: failed to register pll clock %s : %ld\n",
__func__, pll_clk->name, PTR_ERR(clk));
kfree(pll);
return;
}
samsung_clk_add_lookup(clk, pll_clk->id);
if (!pll_clk->alias)
return;
ret = clk_register_clkdev(clk, pll_clk->alias, pll_clk->dev_name);
if (ret)
pr_err("%s: failed to register lookup for %s : %d",
__func__, pll_clk->name, ret);
}
void __init samsung_clk_register_pll(struct samsung_pll_clock *pll_list,
unsigned int nr_pll, void __iomem *base)
{
int cnt;
for (cnt = 0; cnt < nr_pll; cnt++)
_samsung_clk_register_pll(&pll_list[cnt], base);
}

View File

@ -12,6 +12,13 @@
#ifndef __SAMSUNG_CLK_PLL_H
#define __SAMSUNG_CLK_PLL_H
enum samsung_pll_type {
pll_35xx,
pll_36xx,
pll_2550,
pll_2650,
};
enum pll45xx_type {
pll_4500,
pll_4502,

View File

@ -19,6 +19,7 @@
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include "clk-pll.h"
/**
* struct samsung_clock_alias: information about mux clock
@ -261,6 +262,51 @@ struct samsung_clk_reg_dump {
u32 value;
};
/**
* struct samsung_pll_clock: information about pll clock
* @id: platform specific id of the clock.
* @dev_name: name of the device to which this clock belongs.
* @name: name of this pll clock.
* @parent_name: name of the parent clock.
* @flags: optional flags for basic clock.
* @con_offset: offset of the register for configuring the PLL.
* @lock_offset: offset of the register for locking the PLL.
* @type: Type of PLL to be registered.
* @alias: optional clock alias name to be assigned to this clock.
*/
struct samsung_pll_clock {
unsigned int id;
const char *dev_name;
const char *name;
const char *parent_name;
unsigned long flags;
int con_offset;
int lock_offset;
enum samsung_pll_type type;
const char *alias;
};
#define __PLL(_typ, _id, _dname, _name, _pname, _flags, _lock, _con, _alias) \
{ \
.id = _id, \
.type = _typ, \
.dev_name = _dname, \
.name = _name, \
.parent_name = _pname, \
.flags = CLK_GET_RATE_NOCACHE, \
.con_offset = _con, \
.lock_offset = _lock, \
.alias = _alias, \
}
#define PLL(_typ, _id, _name, _pname, _lock, _con) \
__PLL(_typ, _id, NULL, _name, _pname, CLK_GET_RATE_NOCACHE, \
_lock, _con, NULL)
#define PLL_A(_typ, _id, _name, _pname, _lock, _con, _alias) \
__PLL(_typ, _id, NULL, _name, _pname, CLK_GET_RATE_NOCACHE, \
_lock, _con, _alias)
extern void __init samsung_clk_init(struct device_node *np, void __iomem *base,
unsigned long nr_clks, unsigned long *rdump,
unsigned long nr_rdump, unsigned long *soc_rdump,
@ -284,6 +330,8 @@ extern void __init samsung_clk_register_div(struct samsung_div_clock *clk_list,
unsigned int nr_clk);
extern void __init samsung_clk_register_gate(
struct samsung_gate_clock *clk_list, unsigned int nr_clk);
extern void __init samsung_clk_register_pll(struct samsung_pll_clock *pll_list,
unsigned int nr_clk, void __iomem *base);
extern unsigned long _get_rate(const char *clk_name);