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clk: at91: make use of syscon/regmap internally

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Use the regmap coming from syscon to access the registers instead of using
pmc_read/pmc_write. This allows to avoid passing the at91_pmc structure to
the child nodes of the PMC.

The final benefit is to have each clock register itself instead of having
to iterate over the children.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Boris Brezillon
2014-09-07 08:14:29 +02:00
committed by Alexandre Belloni
parent 863a81c3be
commit 1bdf02326b
15 changed files with 693 additions and 693 deletions
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27
drivers/clk/at91/clk-slow.c
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@@ -21,6 +21,8 @@
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/wait.h>
@@ -58,7 +60,7 @@ struct clk_slow_rc_osc {
struct clk_sam9260_slow {
struct clk_hw hw;
struct at91_pmc *pmc;
struct regmap *regmap;
};
#define to_clk_sam9260_slow(hw) container_of(hw, struct clk_sam9260_slow, hw)
@@ -388,8 +390,11 @@ void __init of_at91sam9x5_clk_slow_setup(struct device_node *np,
static u8 clk_sam9260_slow_get_parent(struct clk_hw *hw)
{
struct clk_sam9260_slow *slowck = to_clk_sam9260_slow(hw);
unsigned int status;
return !!(pmc_read(slowck->pmc, AT91_PMC_SR) & AT91_PMC_OSCSEL);
regmap_read(slowck->regmap, AT91_PMC_SR, &status);
return status & AT91_PMC_OSCSEL ? 1 : 0;
}
static const struct clk_ops sam9260_slow_ops = {
@@ -397,7 +402,7 @@ static const struct clk_ops sam9260_slow_ops = {
};
static struct clk * __init
at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
at91_clk_register_sam9260_slow(struct regmap *regmap,
const char *name,
const char **parent_names,
int num_parents)
@@ -406,7 +411,7 @@ at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
struct clk *clk = NULL;
struct clk_init_data init;
if (!pmc || !name)
if (!name)
return ERR_PTR(-EINVAL);
if (!parent_names || !num_parents)
@@ -423,7 +428,7 @@ at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
init.flags = 0;
slowck->hw.init = &init;
slowck->pmc = pmc;
slowck->regmap = regmap;
clk = clk_register(NULL, &slowck->hw);
if (IS_ERR(clk))
@@ -432,26 +437,32 @@ at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
return clk;
}
void __init of_at91sam9260_clk_slow_setup(struct device_node *np,
struct at91_pmc *pmc)
static void __init of_at91sam9260_clk_slow_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_names[2];
int num_parents;
const char *name = np->name;
struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents != 2)
return;
of_clk_parent_fill(np, parent_names, num_parents);
regmap = syscon_node_to_regmap(of_get_parent(np));
if (IS_ERR(regmap))
return;
of_property_read_string(np, "clock-output-names", &name);
clk = at91_clk_register_sam9260_slow(pmc, name, parent_names,
clk = at91_clk_register_sam9260_slow(regmap, name, parent_names,
num_parents);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
CLK_OF_DECLARE(at91sam9260_clk_slow, "atmel,at91sam9260-clk-slow",
of_at91sam9260_clk_slow_setup);