Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

[linux-2.6-block.git] / drivers / clk / at91 / clk-usb.c

diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index 8ab8502778a282bac38b56ce9ecb7cd92c8962e2..d80bdb0a8b029750379107c5995c187c1b949747 100644 (file)
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -12,8 +12,8 @@
 #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"
 
@@ -27,7 +27,7 @@
 
 struct at91sam9x5_clk_usb {
        struct clk_hw hw;
-       struct at91_pmc *pmc;
+       struct regmap *regmap;
 };
 
 #define to_at91sam9x5_clk_usb(hw) \
@@ -35,7 +35,7 @@ struct at91sam9x5_clk_usb {
 
 struct at91rm9200_clk_usb {
        struct clk_hw hw;
-       struct at91_pmc *pmc;
+       struct regmap *regmap;
        u32 divisors[4];
 };
 
@@ -45,13 +45,12 @@ struct at91rm9200_clk_usb {
 static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw,
                                                    unsigned long parent_rate)
 {
-       u32 tmp;
-       u8 usbdiv;
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
+       unsigned int usbr;
+       u8 usbdiv;
 
-       tmp = pmc_read(pmc, AT91_PMC_USB);
-       usbdiv = (tmp & AT91_PMC_OHCIUSBDIV) >> SAM9X5_USB_DIV_SHIFT;
+       regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
+       usbdiv = (usbr & AT91_PMC_OHCIUSBDIV) >> SAM9X5_USB_DIV_SHIFT;
 
        return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1));
 }
@@ -109,33 +108,31 @@ static int at91sam9x5_clk_usb_determine_rate(struct clk_hw *hw,
 
 static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
 {
-       u32 tmp;
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
 
        if (index > 1)
                return -EINVAL;
-       tmp = pmc_read(pmc, AT91_PMC_USB) & ~AT91_PMC_USBS;
-       if (index)
-               tmp |= AT91_PMC_USBS;
-       pmc_write(pmc, AT91_PMC_USB, tmp);
+
+       regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS,
+                          index ? AT91_PMC_USBS : 0);
+
        return 0;
 }
 
 static u8 at91sam9x5_clk_usb_get_parent(struct clk_hw *hw)
 {
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
+       unsigned int usbr;
 
-       return pmc_read(pmc, AT91_PMC_USB) & AT91_PMC_USBS;
+       regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
+
+       return usbr & AT91_PMC_USBS;
 }
 
 static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
                                       unsigned long parent_rate)
 {
-       u32 tmp;
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
        unsigned long div;
 
        if (!rate)
@@ -145,9 +142,8 @@ static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
        if (div > SAM9X5_USB_MAX_DIV + 1 || !div)
                return -EINVAL;
 
-       tmp = pmc_read(pmc, AT91_PMC_USB) & ~AT91_PMC_OHCIUSBDIV;
-       tmp |= (div - 1) << SAM9X5_USB_DIV_SHIFT;
-       pmc_write(pmc, AT91_PMC_USB, tmp);
+       regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_OHCIUSBDIV,
+                          (div - 1) << SAM9X5_USB_DIV_SHIFT);
 
        return 0;
 }
@@ -163,28 +159,28 @@ static const struct clk_ops at91sam9x5_usb_ops = {
 static int at91sam9n12_clk_usb_enable(struct clk_hw *hw)
 {
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
 
-       pmc_write(pmc, AT91_PMC_USB,
-                 pmc_read(pmc, AT91_PMC_USB) | AT91_PMC_USBS);
+       regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS,
+                          AT91_PMC_USBS);
+
        return 0;
 }
 
 static void at91sam9n12_clk_usb_disable(struct clk_hw *hw)
 {
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
 
-       pmc_write(pmc, AT91_PMC_USB,
-                 pmc_read(pmc, AT91_PMC_USB) & ~AT91_PMC_USBS);
+       regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS, 0);
 }
 
 static int at91sam9n12_clk_usb_is_enabled(struct clk_hw *hw)
 {
        struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
+       unsigned int usbr;
 
-       return !!(pmc_read(pmc, AT91_PMC_USB) & AT91_PMC_USBS);
+       regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
+
+       return usbr & AT91_PMC_USBS;
 }
 
 static const struct clk_ops at91sam9n12_usb_ops = {
@@ -197,7 +193,7 @@ static const struct clk_ops at91sam9n12_usb_ops = {
 };
 
 static struct clk * __init
-at91sam9x5_clk_register_usb(struct at91_pmc *pmc, const char *name,
+at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
                            const char **parent_names, u8 num_parents)
 {
        struct at91sam9x5_clk_usb *usb;
@@ -216,7 +212,7 @@ at91sam9x5_clk_register_usb(struct at91_pmc *pmc, const char *name,
                     CLK_SET_RATE_PARENT;
 
        usb->hw.init = &init;
-       usb->pmc = pmc;
+       usb->regmap = regmap;
 
        clk = clk_register(NULL, &usb->hw);
        if (IS_ERR(clk))
@@ -226,7 +222,7 @@ at91sam9x5_clk_register_usb(struct at91_pmc *pmc, const char *name,
 }
 
 static struct clk * __init
-at91sam9n12_clk_register_usb(struct at91_pmc *pmc, const char *name,
+at91sam9n12_clk_register_usb(struct regmap *regmap, const char *name,
                             const char *parent_name)
 {
        struct at91sam9x5_clk_usb *usb;
@@ -244,7 +240,7 @@ at91sam9n12_clk_register_usb(struct at91_pmc *pmc, const char *name,
        init.flags = CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT;
 
        usb->hw.init = &init;
-       usb->pmc = pmc;
+       usb->regmap = regmap;
 
        clk = clk_register(NULL, &usb->hw);
        if (IS_ERR(clk))
@@ -257,12 +253,12 @@ static unsigned long at91rm9200_clk_usb_recalc_rate(struct clk_hw *hw,
                                                    unsigned long parent_rate)
 {
        struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
-       u32 tmp;
+       unsigned int pllbr;
        u8 usbdiv;
 
-       tmp = pmc_read(pmc, AT91_CKGR_PLLBR);
-       usbdiv = (tmp & AT91_PMC_USBDIV) >> RM9200_USB_DIV_SHIFT;
+       regmap_read(usb->regmap, AT91_CKGR_PLLBR, &pllbr);
+
+       usbdiv = (pllbr & AT91_PMC_USBDIV) >> RM9200_USB_DIV_SHIFT;
        if (usb->divisors[usbdiv])
                return parent_rate / usb->divisors[usbdiv];
 
@@ -310,10 +306,8 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
 static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
                                       unsigned long parent_rate)
 {
-       u32 tmp;
        int i;
        struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
-       struct at91_pmc *pmc = usb->pmc;
        unsigned long div;
 
        if (!rate)
@@ -323,10 +317,10 @@ static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
 
        for (i = 0; i < RM9200_USB_DIV_TAB_SIZE; i++) {
                if (usb->divisors[i] == div) {
-                       tmp = pmc_read(pmc, AT91_CKGR_PLLBR) &
-                             ~AT91_PMC_USBDIV;
-                       tmp |= i << RM9200_USB_DIV_SHIFT;
-                       pmc_write(pmc, AT91_CKGR_PLLBR, tmp);
+                       regmap_update_bits(usb->regmap, AT91_CKGR_PLLBR,
+                                          AT91_PMC_USBDIV,
+                                          i << RM9200_USB_DIV_SHIFT);
+
                        return 0;
                }
        }
@@ -341,7 +335,7 @@ static const struct clk_ops at91rm9200_usb_ops = {
 };
 
 static struct clk * __init
-at91rm9200_clk_register_usb(struct at91_pmc *pmc, const char *name,
+at91rm9200_clk_register_usb(struct regmap *regmap, const char *name,
                            const char *parent_name, const u32 *divisors)
 {
        struct at91rm9200_clk_usb *usb;
@@ -359,7 +353,7 @@ at91rm9200_clk_register_usb(struct at91_pmc *pmc, const char *name,
        init.flags = CLK_SET_RATE_PARENT;
 
        usb->hw.init = &init;
-       usb->pmc = pmc;
+       usb->regmap = regmap;
        memcpy(usb->divisors, divisors, sizeof(usb->divisors));
 
        clk = clk_register(NULL, &usb->hw);
@@ -369,35 +363,42 @@ at91rm9200_clk_register_usb(struct at91_pmc *pmc, const char *name,
        return clk;
 }
 
-void __init of_at91sam9x5_clk_usb_setup(struct device_node *np,
-                                       struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_usb_setup(struct device_node *np)
 {
        struct clk *clk;
-       int num_parents;
+       unsigned int num_parents;
        const char *parent_names[USB_SOURCE_MAX];
        const char *name = np->name;
+       struct regmap *regmap;
 
        num_parents = of_clk_get_parent_count(np);
-       if (num_parents <= 0 || num_parents > USB_SOURCE_MAX)
+       if (num_parents == 0 || num_parents > USB_SOURCE_MAX)
                return;
 
        of_clk_parent_fill(np, parent_names, num_parents);
 
        of_property_read_string(np, "clock-output-names", &name);
 
-       clk = at91sam9x5_clk_register_usb(pmc, name, parent_names, num_parents);
+       regmap = syscon_node_to_regmap(of_get_parent(np));
+       if (IS_ERR(regmap))
+               return;
+
+       clk = at91sam9x5_clk_register_usb(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(at91sam9x5_clk_usb, "atmel,at91sam9x5-clk-usb",
+              of_at91sam9x5_clk_usb_setup);
 
-void __init of_at91sam9n12_clk_usb_setup(struct device_node *np,
-                                        struct at91_pmc *pmc)
+static void __init of_at91sam9n12_clk_usb_setup(struct device_node *np)
 {
        struct clk *clk;
        const char *parent_name;
        const char *name = np->name;
+       struct regmap *regmap;
 
        parent_name = of_clk_get_parent_name(np, 0);
        if (!parent_name)
@@ -405,20 +406,26 @@ void __init of_at91sam9n12_clk_usb_setup(struct device_node *np,
 
        of_property_read_string(np, "clock-output-names", &name);
 
-       clk = at91sam9n12_clk_register_usb(pmc, name, parent_name);
+       regmap = syscon_node_to_regmap(of_get_parent(np));
+       if (IS_ERR(regmap))
+               return;
+
+       clk = at91sam9n12_clk_register_usb(regmap, name, parent_name);
        if (IS_ERR(clk))
                return;
 
        of_clk_add_provider(np, of_clk_src_simple_get, clk);
 }
+CLK_OF_DECLARE(at91sam9n12_clk_usb, "atmel,at91sam9n12-clk-usb",
+              of_at91sam9n12_clk_usb_setup);
 
-void __init of_at91rm9200_clk_usb_setup(struct device_node *np,
-                                       struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_usb_setup(struct device_node *np)
 {
        struct clk *clk;
        const char *parent_name;
        const char *name = np->name;
        u32 divisors[4] = {0, 0, 0, 0};
+       struct regmap *regmap;
 
        parent_name = of_clk_get_parent_name(np, 0);
        if (!parent_name)
@@ -430,9 +437,15 @@ void __init of_at91rm9200_clk_usb_setup(struct device_node *np,
 
        of_property_read_string(np, "clock-output-names", &name);
 
-       clk = at91rm9200_clk_register_usb(pmc, name, parent_name, divisors);
+       regmap = syscon_node_to_regmap(of_get_parent(np));
+       if (IS_ERR(regmap))
+               return;
+
+       clk = at91rm9200_clk_register_usb(regmap, name, parent_name, divisors);
        if (IS_ERR(clk))
                return;
 
        of_clk_add_provider(np, of_clk_src_simple_get, clk);
 }
+CLK_OF_DECLARE(at91rm9200_clk_usb, "atmel,at91rm9200-clk-usb",
+              of_at91rm9200_clk_usb_setup);