Merge tag 'at91-ab-4.6-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into next/drivers

From Alexandre Belloni:

"This is a rework of the PMC driver. It touches multiple subsystems so
the easiest path is through arm-soc."

drivers update for 4.6:
 - Big PMC rework that touches clk, PM, usb

* tag 'at91-ab-4.6-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  clk: at91: remove useless includes
  clk: at91: pmc: remove useless capacities handling
  clk: at91: pmc: drop at91_pmc_base
  usb: gadget: atmel: access the PMC using regmap
  ARM: at91: remove useless includes and function prototypes
  ARM: at91: pm: move idle functions to pm.c
  ARM: at91: pm: find and remap the pmc
  ARM: at91: pm: simply call at91_pm_init
  clk: at91: pmc: move pmc structures to C file
  clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
  clk: at91: remove IRQ handling and use polling
  clk: at91: make use of syscon/regmap internally
  clk: at91: make use of syscon to share PMC registers in several drivers

Signed-off-by: Olof Johansson <olof@lixom.net>

24 files changed, 724 insertions, 1294 deletions

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 23be2e433097..08047afdf38e 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -104,6 +104,7 @@ config HAVE_AT91_USB_CLK
 config COMMON_CLK_AT91
 	bool
 	select COMMON_CLK
+	select MFD_SYSCON
 
 config HAVE_AT91_SMD
 	bool
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index c1a7c6cc00e1..63b4fa25b48a 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -12,7 +12,6 @@
 #include <linux/of_platform.h>
 
 #include <asm/mach/arch.h>
-#include <asm/system_misc.h>
 
 #include "generic.h"
 #include "soc.h"
@@ -33,7 +32,6 @@ static void __init at91rm9200_dt_device_init(void)
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
 
-	arm_pm_idle = at91rm9200_idle;
 	at91rm9200_pm_init();
 }
 
diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
index 7eb64f763034..cada2a6412b3 100644
--- a/arch/arm/mach-at91/at91sam9.c
+++ b/arch/arm/mach-at91/at91sam9.c
@@ -62,8 +62,6 @@ static void __init at91sam9_common_init(void)
 		soc_dev = soc_device_to_device(soc);
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
-
-	arm_pm_idle = at91sam9_idle;
 }
 
 static void __init at91sam9_dt_device_init(void)
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index b0fa7dc7286d..28ca57a2060f 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -11,27 +11,18 @@
 #ifndef _AT91_GENERIC_H
 #define _AT91_GENERIC_H
 
-#include <linux/of.h>
-#include <linux/reboot.h>
-
- /* Map io */
-extern void __init at91_map_io(void);
-extern void __init at91_alt_map_io(void);
-
-/* idle */
-extern void at91rm9200_idle(void);
-extern void at91sam9_idle(void);
-
 #ifdef CONFIG_PM
 extern void __init at91rm9200_pm_init(void);
 extern void __init at91sam9260_pm_init(void);
 extern void __init at91sam9g45_pm_init(void);
 extern void __init at91sam9x5_pm_init(void);
+extern void __init sama5_pm_init(void);
 #else
 static inline void __init at91rm9200_pm_init(void) { }
 static inline void __init at91sam9260_pm_init(void) { }
 static inline void __init at91sam9g45_pm_init(void) { }
 static inline void __init at91sam9x5_pm_init(void) { }
+static inline void __init sama5_pm_init(void) { }
 #endif
 
 #endif /* _AT91_GENERIC_H */
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 23726fb31741..f06270198bf1 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -31,10 +31,13 @@
 #include <asm/mach/irq.h>
 #include <asm/fncpy.h>
 #include <asm/cacheflush.h>
+#include <asm/system_misc.h>
 
 #include "generic.h"
 #include "pm.h"
 
+static void __iomem *pmc;
+
 /*
  * FIXME: this is needed to communicate between the pinctrl driver and
  * the PM implementation in the machine. Possibly part of the PM
@@ -87,7 +90,7 @@ static int at91_pm_verify_clocks(void)
 	unsigned long scsr;
 	int i;
 
-	scsr = at91_pmc_read(AT91_PMC_SCSR);
+	scsr = readl(pmc + AT91_PMC_SCSR);
 
 	/* USB must not be using PLLB */
 	if ((scsr & at91_pm_data.uhp_udp_mask) != 0) {
@@ -101,8 +104,7 @@ static int at91_pm_verify_clocks(void)
 
 		if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
 			continue;
-
-		css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
+		css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
 		if (css != AT91_PMC_CSS_SLOW) {
 			pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css);
 			return 0;
@@ -145,8 +147,8 @@ static void at91_pm_suspend(suspend_state_t state)
 	flush_cache_all();
 	outer_disable();
 
-	at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0],
-				at91_ramc_base[1], pm_data);
+	at91_suspend_sram_fn(pmc, at91_ramc_base[0],
+			     at91_ramc_base[1], pm_data);
 
 	outer_resume();
 }
@@ -353,6 +355,21 @@ static __init void at91_dt_ramc(void)
 	at91_pm_set_standby(standby);
 }
 
+void at91rm9200_idle(void)
+{
+	/*
+	 * Disable the processor clock.  The processor will be automatically
+	 * re-enabled by an interrupt or by a reset.
+	 */
+	writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
+}
+
+void at91sam9_idle(void)
+{
+	writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
+	cpu_do_idle();
+}
+
 static void __init at91_pm_sram_init(void)
 {
 	struct gen_pool *sram_pool;
@@ -399,13 +416,36 @@ static void __init at91_pm_sram_init(void)
 			&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
 }
 
-static void __init at91_pm_init(void)
+static const struct of_device_id atmel_pmc_ids[] __initconst = {
+	{ .compatible = "atmel,at91rm9200-pmc"  },
+	{ .compatible = "atmel,at91sam9260-pmc" },
+	{ .compatible = "atmel,at91sam9g45-pmc" },
+	{ .compatible = "atmel,at91sam9n12-pmc" },
+	{ .compatible = "atmel,at91sam9x5-pmc" },
+	{ .compatible = "atmel,sama5d3-pmc" },
+	{ .compatible = "atmel,sama5d2-pmc" },
+	{ /* sentinel */ },
+};
+
+static void __init at91_pm_init(void (*pm_idle)(void))
 {
-	at91_pm_sram_init();
+	struct device_node *pmc_np;
 
 	if (at91_cpuidle_device.dev.platform_data)
 		platform_device_register(&at91_cpuidle_device);
 
+	pmc_np = of_find_matching_node(NULL, atmel_pmc_ids);
+	pmc = of_iomap(pmc_np, 0);
+	if (!pmc) {
+		pr_err("AT91: PM not supported, PMC not found\n");
+		return;
+	}
+
+	if (pm_idle)
+		arm_pm_idle = pm_idle;
+
+	at91_pm_sram_init();
+
 	if (at91_suspend_sram_fn)
 		suspend_set_ops(&at91_pm_ops);
 	else
@@ -424,7 +464,7 @@ void __init at91rm9200_pm_init(void)
 	at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP;
 	at91_pm_data.memctrl = AT91_MEMCTRL_MC;
 
-	at91_pm_init();
+	at91_pm_init(at91rm9200_idle);
 }
 
 void __init at91sam9260_pm_init(void)
@@ -432,7 +472,7 @@ void __init at91sam9260_pm_init(void)
 	at91_dt_ramc();
 	at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
 	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
-	return at91_pm_init();
+	at91_pm_init(at91sam9_idle);
 }
 
 void __init at91sam9g45_pm_init(void)
@@ -440,7 +480,7 @@ void __init at91sam9g45_pm_init(void)
 	at91_dt_ramc();
 	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
 	at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
-	return at91_pm_init();
+	at91_pm_init(at91sam9_idle);
 }
 
 void __init at91sam9x5_pm_init(void)
@@ -448,5 +488,13 @@ void __init at91sam9x5_pm_init(void)
 	at91_dt_ramc();
 	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
 	at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
-	return at91_pm_init();
+	at91_pm_init(at91sam9_idle);
+}
+
+void __init sama5_pm_init(void)
+{
+	at91_dt_ramc();
+	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
+	at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
+	at91_pm_init(NULL);
 }
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index d9cf6799aec0..df8fdf1cf66d 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -51,7 +51,7 @@ static void __init sama5_dt_device_init(void)
 		soc_dev = soc_device_to_device(soc);
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
-	at91sam9x5_pm_init();
+	sama5_pm_init();
 }
 
 static const char *const sama5_dt_board_compat[] __initconst = {
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index abc80949e1dd..4ad3298eb372 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -15,8 +15,8 @@
 #include <linux/clkdev.h>
 #include <linux/clk/at91_pmc.h>
 #include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #include "pmc.h"
 
@@ -28,8 +28,9 @@
 
 struct clk_generated {
 	struct clk_hw hw;
-	struct at91_pmc *pmc;
+	struct regmap *regmap;
 	struct clk_range range;
+	spinlock_t *lock;
 	u32 id;
 	u32 gckdiv;
 	u8 parent_id;
@@ -41,49 +42,52 @@ struct clk_generated {
 static int clk_generated_enable(struct clk_hw *hw)
 {
 	struct clk_generated *gck = to_clk_generated(hw);
-	struct at91_pmc *pmc = gck->pmc;
-	u32 tmp;
+	unsigned long flags;
 
 	pr_debug("GCLK: %s, gckdiv = %d, parent id = %d\n",
 		 __func__, gck->gckdiv, gck->parent_id);
 
-	pmc_lock(pmc);
-	pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
-	tmp = pmc_read(pmc, AT91_PMC_PCR) &
-			~(AT91_PMC_PCR_GCKDIV_MASK | AT91_PMC_PCR_GCKCSS_MASK);
-	pmc_write(pmc, AT91_PMC_PCR, tmp | AT91_PMC_PCR_GCKCSS(gck->parent_id)
-					 | AT91_PMC_PCR_CMD
-					 | AT91_PMC_PCR_GCKDIV(gck->gckdiv)
-					 | AT91_PMC_PCR_GCKEN);
-	pmc_unlock(pmc);
+	spin_lock_irqsave(gck->lock, flags);
+	regmap_write(gck->regmap, AT91_PMC_PCR,
+		     (gck->id & AT91_PMC_PCR_PID_MASK));
+	regmap_update_bits(gck->regmap, AT91_PMC_PCR,
+			   AT91_PMC_PCR_GCKDIV_MASK | AT91_PMC_PCR_GCKCSS_MASK |
+			   AT91_PMC_PCR_CMD | AT91_PMC_PCR_GCKEN,
+			   AT91_PMC_PCR_GCKCSS(gck->parent_id) |
+			   AT91_PMC_PCR_CMD |
+			   AT91_PMC_PCR_GCKDIV(gck->gckdiv) |
+			   AT91_PMC_PCR_GCKEN);
+	spin_unlock_irqrestore(gck->lock, flags);
 	return 0;
 }
 
 static void clk_generated_disable(struct clk_hw *hw)
 {
 	struct clk_generated *gck = to_clk_generated(hw);
-	struct at91_pmc *pmc = gck->pmc;
-	u32 tmp;
-
-	pmc_lock(pmc);
-	pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
-	tmp = pmc_read(pmc, AT91_PMC_PCR) & ~AT91_PMC_PCR_GCKEN;
-	pmc_write(pmc, AT91_PMC_PCR, tmp | AT91_PMC_PCR_CMD);
-	pmc_unlock(pmc);
+	unsigned long flags;
+
+	spin_lock_irqsave(gck->lock, flags);
+	regmap_write(gck->regmap, AT91_PMC_PCR,
+		     (gck->id & AT91_PMC_PCR_PID_MASK));
+	regmap_update_bits(gck->regmap, AT91_PMC_PCR,
+			   AT91_PMC_PCR_CMD | AT91_PMC_PCR_GCKEN,
+			   AT91_PMC_PCR_CMD);
+	spin_unlock_irqrestore(gck->lock, flags);
 }
 
 static int clk_generated_is_enabled(struct clk_hw *hw)
 {
 	struct clk_generated *gck = to_clk_generated(hw);
-	struct at91_pmc *pmc = gck->pmc;
-	int ret;
+	unsigned long flags;
+	unsigned int status;
 
-	pmc_lock(pmc);
-	pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
-	ret = !!(pmc_read(pmc, AT91_PMC_PCR) & AT91_PMC_PCR_GCKEN);
-	pmc_unlock(pmc);
+	spin_lock_irqsave(gck->lock, flags);
+	regmap_write(gck->regmap, AT91_PMC_PCR,
+		     (gck->id & AT91_PMC_PCR_PID_MASK));
+	regmap_read(gck->regmap, AT91_PMC_PCR, &status);
+	spin_unlock_irqrestore(gck->lock, flags);
 
-	return ret;
+	return status & AT91_PMC_PCR_GCKEN ? 1 : 0;
 }
 
 static unsigned long
@@ -214,13 +218,14 @@ static const struct clk_ops generated_ops = {
  */
 static void clk_generated_startup(struct clk_generated *gck)
 {
-	struct at91_pmc *pmc = gck->pmc;
 	u32 tmp;
+	unsigned long flags;
 
-	pmc_lock(pmc);
-	pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
-	tmp = pmc_read(pmc, AT91_PMC_PCR);
-	pmc_unlock(pmc);
+	spin_lock_irqsave(gck->lock, flags);
+	regmap_write(gck->regmap, AT91_PMC_PCR,
+		     (gck->id & AT91_PMC_PCR_PID_MASK));
+	regmap_read(gck->regmap, AT91_PMC_PCR, &tmp);
+	spin_unlock_irqrestore(gck->lock, flags);
 
 	gck->parent_id = (tmp & AT91_PMC_PCR_GCKCSS_MASK)
 					>> AT91_PMC_PCR_GCKCSS_OFFSET;
@@ -229,8 +234,8 @@ static void clk_generated_startup(struct clk_generated *gck)
 }
 
 static struct clk * __init
-at91_clk_register_generated(struct at91_pmc *pmc, const char *name,
-			    const char **parent_names, u8 num_parents,
+at91_clk_register_generated(struct regmap *regmap,  spinlock_t *lock, const char
+			    *name, const char **parent_names, u8 num_parents,
 			    u8 id, const struct clk_range *range)
 {
 	struct clk_generated *gck;
@@ -249,7 +254,8 @@ at91_clk_register_generated(struct at91_pmc *pmc, const char *name,
 
 	gck->id = id;
 	gck->hw.init = &init;
-	gck->pmc = pmc;
+	gck->regmap = regmap;
+	gck->lock = lock;
 	gck->range = *range;
 
 	clk = clk_register(NULL, &gck->hw);
@@ -261,8 +267,7 @@ at91_clk_register_generated(struct at91_pmc *pmc, const char *name,
 	return clk;
 }
 
-void __init of_sama5d2_clk_generated_setup(struct device_node *np,
-					   struct at91_pmc *pmc)
+void __init of_sama5d2_clk_generated_setup(struct device_node *np)
 {
 	int num;
 	u32 id;
@@ -272,6 +277,7 @@ void __init of_sama5d2_clk_generated_setup(struct device_node *np,
 	const char *parent_names[GENERATED_SOURCE_MAX];
 	struct device_node *gcknp;
 	struct clk_range range = CLK_RANGE(0, 0);
+	struct regmap *regmap;
 
 	num_parents = of_clk_get_parent_count(np);
 	if (num_parents <= 0 || num_parents > GENERATED_SOURCE_MAX)
@@ -283,6 +289,10 @@ void __init of_sama5d2_clk_generated_setup(struct device_node *np,
 	if (!num || num > PERIPHERAL_MAX)
 		return;
 
+	regmap = syscon_node_to_regmap(of_get_parent(np));
+	if (IS_ERR(regmap))
+		return;
+
 	for_each_child_of_node(np, gcknp) {
 		if (of_property_read_u32(gcknp, "reg", &id))
 			continue;
@@ -296,11 +306,14 @@ void __init of_sama5d2_clk_generated_setup(struct device_node *np,
 		of_at91_get_clk_range(gcknp, "atmel,clk-output-range",
 				      &range);
 
-		clk = at91_clk_register_generated(pmc, name, parent_names,
-						  num_parents, id, &range);
+		clk = at91_clk_register_generated(regmap, &pmc_pcr_lock, name,
+						  parent_names, num_parents,
+						  id, &range);
 		if (IS_ERR(clk))
 			continue;
 
 		of_clk_add_provider(gcknp, of_clk_src_simple_get, clk);
 	}
 }
+CLK_OF_DECLARE(of_sama5d2_clk_generated_setup, "atmel,sama5d2-clk-generated",
+	       of_sama5d2_clk_generated_setup);
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 61566bcefa53..819f5842fa66 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -15,15 +15,9 @@
 #include <linux/clk-provider.h>
 #include <linux/clkdev.h>
 #include <linux/clk/at91_pmc.h>
-#include <linux/delay.h>
 #include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
 
 #include "pmc.h"
 
@@ -31,7 +25,7 @@
 
 struct clk_sama5d4_h32mx {
 	struct clk_hw hw;
-	struct at91_pmc *pmc;
+	struct regmap *regmap;
 };
 
 #define to_clk_sama5d4_h32mx(hw) container_of(hw, struct clk_sama5d4_h32mx, hw)
@@ -40,8 +34,10 @@ static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw,
 						 unsigned long parent_rate)
 {
 	struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw);
+	unsigned int mckr;
 
-	if (pmc_read(h32mxclk->pmc, AT91_PMC_MCKR) & AT91_PMC_H32MXDIV)
+	regmap_read(h32mxclk->regmap, AT91_PMC_MCKR, &mckr);
+	if (mckr & AT91_PMC_H32MXDIV)
 		return parent_rate / 2;
 
 	if (parent_rate > H32MX_MAX_FREQ)
@@ -70,18 +66,16 @@ static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate,
 				    unsigned long parent_rate)
 {
 	struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw);
-	struct at91_pmc *pmc = h32mxclk->pmc;
-	u32 tmp;
+	u32 mckr = 0;
 
 	if (parent_rate != rate && (parent_rate / 2) != rate)
 		return -EINVAL;
 
-	pmc_lock(pmc);
-	tmp = pmc_read(pmc, AT91_PMC_MCKR) & ~AT91_PMC_H32MXDIV;
 	if ((parent_rate / 2) == rate)
-		tmp |= AT91_PMC_H32MXDIV;
-	pmc_write(pmc, AT91_PMC_MCKR, tmp);
-	pmc_unlock(pmc);
+		mckr = AT91_PMC_H32MXDIV;
+
+	regmap_update_bits(h32mxclk->regmap, AT91_PMC_MCKR,
+			   AT91_PMC_H32MXDIV, mckr);
 
 	return 0;
 }
@@ -92,14 +86,18 @@ static const struct clk_ops h32mx_ops = {
 	.set_rate = clk_sama5d4_h32mx_set_rate,
 };
 
-void __init of_sama5d4_clk_h32mx_setup(struct device_node *np,
-				     struct at91_pmc *pmc)
+static void __init of_sama5d4_clk_h32mx_setup(struct device_node *np)
 {
 	struct clk_sama5d4_h32mx *h32mxclk;
 	struct clk_init_data init;
 	const char *parent_name;
+	struct regmap *regmap;
 	struct clk *clk;
 
+	regmap = syscon_node_to_regmap(of_get_parent(np));
+	if (IS_ERR(regmap))
+		return;
+
 	h32mxclk = kzalloc(sizeof(*h32mxclk), GFP_KERNEL);
 	if (!h32mxclk)
 		return;
@@ -113,7 +111,7 @@ void __init of_sama5d4_clk_h32mx_setup(struct device_node *np,
 	init.flags = CLK_SET_RATE_GATE;
 
 	h32mxclk->hw.init = &init;
-	h32mxclk->pmc = pmc;
+	h32mxclk->regmap = regmap;
 
 	clk = clk_register(NULL, &h32mxclk->hw);
 	if (!clk) {
@@ -123,3 +121,5 @@ void __init of_sama5d4_clk_h32mx_setup(struct device_node *np,
 
 	of_clk_add_provider(np, of_clk_src_simple_get, clk);
 }
+CLK_OF_DECLARE(of_sama5d4_clk_h32mx_setup, "atmel,sama5d4-clk-h32mx",
+	       of_sama5d4_clk_h32mx_setup);
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index fd7247deabdc..4bfc94d6c26e 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -13,13 +13,8 @@
 #include <linux/clk/at91_pmc.h>
 #include <linux/delay.h>
 #include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #include "pmc.h"
 
@@ -34,18 +29,14 @@
 
 struct clk_main_osc {
 	struct clk_hw hw;
-	struct at91_pmc *pmc;
-	unsigned int irq;
-	wait_queue_head_t wait;
+	struct regmap *regmap;
 };
 
 #define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, hw)
 
 struct clk_main_rc_osc {
 	struct clk_hw hw;
-	struct at91_pmc *pmc;
-	unsigned int irq;
-	wait_queue_head_t wait;
+	struct regmap *regmap;
 	unsigned long frequency;
 	unsigned long accuracy;
 };
@@ -54,51 +45,47 @@ struct clk_main_rc_osc {
 
 struct clk_rm9200_main {
 	struct clk_hw hw;
-	struct at91_pmc *pmc;
+	struct regmap *regmap;
 };
 
 #define to_clk_rm9200_main(hw) container_of(hw, struct clk_rm9200_main, hw)
 
 struct clk_sam9x5_main {
 	struct clk_hw hw;
-	struct at91_pmc *pmc;
-	unsigned int irq;
-	wait_queue_head_t wait;
+	struct regmap *regmap;
 	u8 parent;
 };
 
 #define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, hw)
 
-static irqreturn_t clk_main_osc_irq_handler(int irq, void *dev_id)
+static inline bool clk_main_osc_ready(struct regmap *regmap)
 {
-	struct clk_main_osc *osc = dev_id;
+	unsigned int status;
 
-	wake_up(&osc->wait);
-	disable_irq_nosync(osc->irq);
+	regmap_read(regmap, AT91_PMC_SR, &status);
 
-	return IRQ_HANDLED;
+	return status & AT91_PMC_MOSCS;
 }
 
 static int clk_main_osc_prepare(struct clk_hw *hw)
 {
 	struct clk_main_osc *osc = to_clk_main_osc(hw);
-	struct at91_pmc *pmc = osc->pmc;
+	struct regmap *regmap = osc->regmap;
 	u32 tmp;
 
-	tmp = pmc_read(pmc, AT91_CKGR_MOR) & ~MOR_KEY_MASK;
+	regmap_read(regmap, AT91_CKGR_MOR, &tmp);
+	tmp &= ~MOR_KEY_MASK;
+
 	if (tmp & AT91_PMC_OSCBYPASS)
 		return 0;
 
 	if (!(tmp & AT91_PMC_MOSCEN)) {
 		tmp |= AT91_PMC_MOSCEN | AT91_PMC_KEY;
-		pmc_write(pmc, AT91_CKGR_MOR, tmp);
+		regmap_write(regmap, AT91_CKGR_MOR, tmp);
 	}
 
-	while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCS)) {
-		enable_irq(osc->irq);
-		wait_event(osc->wait,
-			   pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCS);
-	}
+	while (!clk_main_osc_ready(regmap))
+		cpu_relax();
 
 	return 0;
 }
@@ -106,9 +93,10 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
 static void clk_main_osc_unprepare(struct clk_hw *hw)
 {
 	struct clk_main_osc *osc = to_clk_main_osc(hw);
-	struct at91_pmc *pmc = osc->pmc;
-	u32 tmp = pmc_read(pmc, AT91_CKGR_MOR);
+	struct regmap *regmap = osc->regmap;
+	u32 tmp;
 
+	regmap_read(regmap, AT91_CKGR_MOR, &tmp);
 	if (tmp & AT91_PMC_OSCBYPASS)
 		return;
 
@@ -116,20 +104,22 @@ static void clk_main_osc_unprepare(struct clk_hw *hw)
 		return;
 
 	tmp &= ~(AT91_PMC_KEY | AT91_PMC_MOSCEN);
-	pmc_write(pmc, AT91_CKGR_MOR, tmp | AT91_PMC_KEY);
+	regmap_write(regmap, AT91_CKGR_MOR, tmp | AT91_PMC_KEY);
 }
 
 static int clk_main_osc_is_prepared(struct clk_hw *hw)
 {
 	struct clk_main_osc *osc = to_clk_main_osc(hw);
-	struct at91_pmc *pmc = osc->pmc;
-	u32 tmp = pmc_read(pmc, AT91_CKGR_MOR);
+	struct regmap *regmap = osc->regmap;
+	u32 tmp, status;
 
+	regmap_read(regmap, AT91_CKGR_MOR, &tmp);
 	if (tmp & AT91_PMC_OSCBYPASS)
 		return 1;
 
-	return !!((pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCS) &&
-		  (pmc_read(pmc, AT91_CKGR_MOR) & AT91_PMC_MOSCEN));
+	regmap_read(regmap, AT91_PMC_SR, &status);
+
+	return (status & AT91_PMC_MOSCS) && (tmp & AT91_PMC_MOSCEN);
 }
 
 static const struct clk_ops main_osc_ops = {
@@ -139,18 +129,16 @@ static const struct clk_ops main_osc_ops = {
 };
 
 static struct clk * __init
-at91_clk_register_main_osc(struct at91_pmc *pmc,
-			   unsigned int irq,
+at91_clk_register_main_osc(struct regmap *regmap,
 			   const char *name,
 			   const char *parent_name,
 			   bool bypass)
 {
-	int ret;
 	struct clk_main_osc *osc;
 	struct clk *clk = NULL;
 	struct clk_init_data init;
 
-	if (!pmc || !irq || !name || !parent_name)
+	if (!name || !parent_name)
 		return ERR_PTR(-EINVAL);
 
 	osc = kzalloc(sizeof(*osc), GFP_KERNEL);
@@ -164,85 +152,70 @@ at91_clk_register_main_osc(struct at91_pmc *pmc,
 	init.flags = CLK_IGNORE_UNUSED;
 
 	osc->hw.init = &init;
-	osc->pmc = pmc;
-	osc->irq = irq;
-
-	init_waitqueue_head(&osc->wait);
-	irq_set_status_flags(osc->irq, IRQ_NOAUTOEN);
-	ret = request_irq(osc->irq, clk_main_osc_irq_handler,
-			  IRQF_TRIGGER_HIGH, name, osc);
-	if (ret) {
-		kfree(osc);
-		return ERR_PTR(ret);
-	}
+	osc->regmap = regmap;
 
 	if (bypass)
-		pmc_write(pmc, AT91_CKGR_MOR,
-			  (pmc_read(pmc, AT91_CKGR_MOR) &
-			   ~(MOR_KEY_MASK | AT91_PMC_MOSCEN)) |
-			  AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
+		regmap_update_bits(regmap,
+				   AT91_CKGR_MOR, MOR_KEY_MASK |
+				   AT91_PMC_MOSCEN,
+				   AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
 
 	clk = clk_register(NULL, &osc->hw);
-	if (IS_ERR(clk)) {
-		free_irq(irq, osc);
+	if (IS_ERR(clk))
 		kfree(osc);
-	}
 
 	return clk;
 }
 
-void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np,
-					     struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
 {
 	struct clk *clk;
-	unsigned int irq;
 	const char *name = np->name;
 	const char *parent_name;
+	struct regmap *regmap;
 	bool bypass;
 
 	of_property_read_string(np, "clock-output-names", &name);
 	bypass = of_property_read_bool(np, "atmel,osc-bypass");
 	parent_name = of_clk_get_parent_name(np, 0);
 
-	irq = irq_of_parse_and_map(np, 0);
-	if (!irq)
+	regmap = syscon_node_to_regmap(of_get_parent(np));
+	if (IS_ERR(regmap))
 		return;
 
-	clk = at91_clk_register_main_osc(pmc, irq, name, parent_name, bypass);
+	clk = at91_clk_register_main_osc(regmap, name, parent_name, bypass);
 	if (IS_ERR(clk))
 		return;
 
 	of_clk_add_provider(np, of_clk_src_simple_get, clk);
 }
+CLK_OF_DECLARE(at91rm9200_clk_main_osc, "atmel,at91rm9200-clk-main-osc",
+	       of_at91rm9200_clk_main_osc_setup);
 
-static irqreturn_t clk_main_rc_osc_irq_handler(int irq, void *dev_id)
+static bool clk_main_rc_osc_ready(struct regmap *regmap)
 {
-	struct clk_main_rc_osc *osc = dev_id;
+	unsigned int status;
 
-	wake_up(&osc->wait);
-	disable_irq_nosync(osc->irq);
+	regmap_read(regmap, AT91_PMC_SR, &status);
 
-	return IRQ_HANDLED;
+	return status & AT91_PMC_MOSCRCS;
 }
 
 static int clk_main_rc_osc_prepare(struct clk_hw *hw)
 {
 	struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
-	struct at91_pmc *pmc = osc->pmc;
-	u32 tmp;
+	struct regmap *regmap = osc->regmap;
+	unsigned int mor;
 
-	tmp = pmc_read(pmc, AT91_CKGR_MOR) & ~MOR_KEY_MASK;
+	regmap_read(regmap, AT91_CKGR_MOR, &mor);
 
-	if (!(tmp & AT91_PMC_MOSCRCEN)) {
-		tmp |= AT91_PMC_MOSCRCEN | AT91_PMC_KEY;
-		pmc_write(pmc, AT91_CKGR_MOR, tmp);
-	}
+	if (!(mor & AT91_PMC_MOSCRCEN))
+		regmap_update_bits(regmap, AT91_CKGR_MOR,
+				   MOR_KEY_MASK | AT91_PMC_MOSCRCEN,
+				   AT91_PMC_MOSCRCEN | AT91_PMC_KEY);
 
-	while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCRCS)) {
-		enable_irq(osc->irq);
-		wait_event(osc->wait,
-			   pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCRCS);
-	}
+	while (!clk_main_rc_osc_ready(regmap))
+		cpu_relax();
 
 	return 0;
 }
@@ -250,23 +223,28 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
 static void clk_main_rc_osc_unprepare(struct clk_hw *hw)
 {
 	struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
-	struct at91_pmc *pmc = osc->pmc;
-	u32 tmp = pmc_read(pmc, AT91_CKGR_MOR);
+	struct regmap *regmap = osc->regmap;
+	unsigned int mor;
+
+	regmap_read(regmap, AT91_CKGR_MOR, &mor);
 
-	if (!(tmp & AT91_PMC_MOSCRCEN))
+	if (!(mor & AT91_PMC_MOSCRCEN))
 		return;
 
-	tmp &= ~(MOR_KEY_MASK | AT91_PMC_MOSCRCEN);
-	pmc_write(pmc, AT91_CKGR_MOR, tmp | AT91_PMC_KEY);
+	regmap_update_bits(regmap, AT91_CKGR_MOR,
+			   MOR_KEY_MASK | AT91_PMC_MOSCRCEN, AT91_PMC_KEY);
 }
 
 static int clk_main_rc_osc_is_prepared(struct clk_hw *hw)
 {
 	struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
-	struct at91_pmc *pmc = osc->pmc;
+	struct regmap *regmap = osc->regmap;
+	unsigned int mor, status;
 
-	return !!((pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCRCS) &&
-		  (pmc_read(pmc, AT91_CKGR_MOR) & AT91_PMC_MOSCRCEN));
+	regmap_read(regmap, AT91_CKGR_MOR, &mor);
+	regmap_read(regmap, AT91_PMC_SR, &status);
+
+	return (mor & AT91_PMC_MOSCRCEN) && (status & AT91_PMC_MOSCRCS);
 }
 
 static unsigned long clk_main_rc_osc_recalc_rate(struct clk_hw *hw,
@@ -294,17 +272,15 @@ static const struct clk_ops main_rc_osc_ops = {
 };
 
 static struct clk * __init
-at91_clk_register_main_rc_osc(struct at91_pmc *pmc,
-			      unsigned int irq,
+at91_clk_register_main_rc_osc(struct regmap *regmap,
 			      const char *name,
 			      u32 frequency, u32