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path: root/drivers/clk/at91/clk-utmi.c
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Diffstat (limited to 'drivers/clk/at91/clk-utmi.c')
-rw-r--r--drivers/clk/at91/clk-utmi.c53
1 files changed, 30 insertions, 23 deletions
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c
index ca561e90a60f..58a310e5768c 100644
--- a/drivers/clk/at91/clk-utmi.c
+++ b/drivers/clk/at91/clk-utmi.c
@@ -19,6 +19,8 @@
#include <linux/io.h>
#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -26,7 +28,7 @@
struct clk_utmi {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
};
@@ -43,19 +45,27 @@ static irqreturn_t clk_utmi_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static inline bool clk_utmi_ready(struct regmap *regmap)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_LOCKU;
+}
+
static int clk_utmi_prepare(struct clk_hw *hw)
{
struct clk_utmi *utmi = to_clk_utmi(hw);
- struct at91_pmc *pmc = utmi->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_UCKR) | AT91_PMC_UPLLEN |
- AT91_PMC_UPLLCOUNT | AT91_PMC_BIASEN;
+ unsigned int uckr = AT91_PMC_UPLLEN | AT91_PMC_UPLLCOUNT |
+ AT91_PMC_BIASEN;
- pmc_write(pmc, AT91_CKGR_UCKR, tmp);
+ regmap_update_bits(utmi->regmap, AT91_CKGR_UCKR, uckr, uckr);
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_LOCKU)) {
+ while (!clk_utmi_ready(utmi->regmap)) {
enable_irq(utmi->irq);
wait_event(utmi->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_LOCKU);
+ clk_utmi_ready(utmi->regmap));
}
return 0;
@@ -64,18 +74,15 @@ static int clk_utmi_prepare(struct clk_hw *hw)
static int clk_utmi_is_prepared(struct clk_hw *hw)
{
struct clk_utmi *utmi = to_clk_utmi(hw);
- struct at91_pmc *pmc = utmi->pmc;
- return !!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_LOCKU);
+ return clk_utmi_ready(utmi->regmap);
}
static void clk_utmi_unprepare(struct clk_hw *hw)
{
struct clk_utmi *utmi = to_clk_utmi(hw);
- struct at91_pmc *pmc = utmi->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_UCKR) & ~AT91_PMC_UPLLEN;
- pmc_write(pmc, AT91_CKGR_UCKR, tmp);
+ regmap_update_bits(utmi->regmap, AT91_CKGR_UCKR, AT91_PMC_UPLLEN, 0);
}
static unsigned long clk_utmi_recalc_rate(struct clk_hw *hw,
@@ -93,7 +100,7 @@ static const struct clk_ops utmi_ops = {
};
static struct clk * __init
-at91_clk_register_utmi(struct at91_pmc *pmc, unsigned int irq,
+at91_clk_register_utmi(struct regmap *regmap, unsigned int irq,
const char *name, const char *parent_name)
{
int ret;
@@ -112,7 +119,7 @@ at91_clk_register_utmi(struct at91_pmc *pmc, unsigned int irq,
init.flags = CLK_SET_RATE_GATE;
utmi->hw.init = &init;
- utmi->pmc = pmc;
+ utmi->regmap = regmap;
utmi->irq = irq;
init_waitqueue_head(&utmi->wait);
irq_set_status_flags(utmi->irq, IRQ_NOAUTOEN);
@@ -132,13 +139,13 @@ at91_clk_register_utmi(struct at91_pmc *pmc, unsigned int irq,
return clk;
}
-static void __init
-of_at91_clk_utmi_setup(struct device_node *np, struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
{
unsigned int irq;
struct clk *clk;
const char *parent_name;
const char *name = np->name;
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
@@ -148,16 +155,16 @@ of_at91_clk_utmi_setup(struct device_node *np, struct at91_pmc *pmc)
if (!irq)
return;
- clk = at91_clk_register_utmi(pmc, irq, name, parent_name);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91_clk_register_utmi(regmap, irq, name, parent_name);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
return;
}
-
-void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np,
- struct at91_pmc *pmc)
-{
- of_at91_clk_utmi_setup(np, pmc);
-}
+CLK_OF_DECLARE(at91sam9x5_clk_utmi, "atmel,at91sam9x5-clk-utmi",
+ of_at91sam9x5_clk_utmi_setup);