[RFC,PATCH 3/7 v2] arm/versatile: use generic struct clk
Jeremy Kerr
jeremy.kerr at canonical.com
Tue Jan 12 17:58:31 EST 2010
Use the common struct clk interface for the versatile clocks.
Signed-off-by: Jeremy Kerr <jeremy.kerr at canonical.com>
---
arch/arm/Kconfig | 1
arch/arm/common/clkdev.c | 2 +
arch/arm/mach-versatile/clock.c | 51 +++++++++++++-------------------
arch/arm/mach-versatile/clock.h | 20 +++++++-----
arch/arm/mach-versatile/core.c | 50 +++++++++++++++----------------
5 files changed, 62 insertions(+), 62 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 233a222..34497ce 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -245,6 +245,7 @@ config ARCH_VERSATILE
select ICST307
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
+ select USE_COMMON_STRUCT_CLK
select ARCH_WANT_OPTIONAL_GPIOLIB
help
This enables support for ARM Ltd Versatile board.
diff --git a/arch/arm/common/clkdev.c b/arch/arm/common/clkdev.c
index aae5bc0..71e7596 100644
--- a/arch/arm/common/clkdev.c
+++ b/arch/arm/common/clkdev.c
@@ -85,11 +85,13 @@ struct clk *clk_get(struct device *dev, const char *con_id)
}
EXPORT_SYMBOL(clk_get);
+#ifndef CONFIG_USE_COMMON_STRUCT_CLK
void clk_put(struct clk *clk)
{
__clk_put(clk);
}
EXPORT_SYMBOL(clk_put);
+#endif /* CONFIG_USE_COMMON_STRUCT_CLK */
void clkdev_add(struct clk_lookup *cl)
{
diff --git a/arch/arm/mach-versatile/clock.c b/arch/arm/mach-versatile/clock.c
index c50a44e..16ab90b 100644
--- a/arch/arm/mach-versatile/clock.c
+++ b/arch/arm/mach-versatile/clock.c
@@ -17,49 +17,42 @@
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/mutex.h>
+#include <linux/clk.h>
-#include <asm/clkdev.h>
#include <asm/hardware/icst307.h>
#include "clock.h"
-int clk_enable(struct clk *clk)
-{
- return 0;
-}
-EXPORT_SYMBOL(clk_enable);
+#define to_clk_versatile(clk) (container_of(clk, struct clk_versatile, clk))
-void clk_disable(struct clk *clk)
+static unsigned long clk_versatile_get_rate(struct clk *clk)
{
+ return to_clk_versatile(clk)->rate;
}
-EXPORT_SYMBOL(clk_disable);
-unsigned long clk_get_rate(struct clk *clk)
-{
- return clk->rate;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
+static long clk_versatile_round_rate(struct clk *clk, unsigned long rate)
{
+ const struct icst307_params *params = &to_clk_versatile(clk)->params;
struct icst307_vco vco;
- vco = icst307_khz_to_vco(clk->params, rate / 1000);
- return icst307_khz(clk->params, vco) * 1000;
+
+ vco = icst307_khz_to_vco(params, rate / 1000);
+ return icst307_khz(params, vco) * 1000;
}
-EXPORT_SYMBOL(clk_round_rate);
-int clk_set_rate(struct clk *clk, unsigned long rate)
+static int clk_versatile_set_rate(struct clk *clk, unsigned long rate)
{
- int ret = -EIO;
+ struct clk_versatile *v_clk = to_clk_versatile(clk);
+ struct icst307_vco vco;
- if (clk->setvco) {
- struct icst307_vco vco;
+ vco = icst307_khz_to_vco(&v_clk->params, rate / 1000);
+ v_clk->rate = icst307_khz(&v_clk->params, vco) * 1000;
+ v_clk->setvco(v_clk, vco);
- vco = icst307_khz_to_vco(clk->params, rate / 1000);
- clk->rate = icst307_khz(clk->params, vco) * 1000;
- clk->setvco(clk, vco);
- ret = 0;
- }
- return ret;
+ return 0;
}
-EXPORT_SYMBOL(clk_set_rate);
+
+struct clk_operations clk_versatile_operations = {
+ .get_rate = clk_versatile_get_rate,
+ .round_rate = clk_versatile_round_rate,
+ .set_rate = clk_versatile_set_rate,
+};
diff --git a/arch/arm/mach-versatile/clock.h b/arch/arm/mach-versatile/clock.h
index 03468fd..d1c8791 100644
--- a/arch/arm/mach-versatile/clock.h
+++ b/arch/arm/mach-versatile/clock.h
@@ -8,13 +8,17 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-struct module;
-struct icst307_params;
-struct clk {
- unsigned long rate;
- const struct icst307_params *params;
- u32 oscoff;
- void *data;
- void (*setvco)(struct clk *, struct icst307_vco vco);
+#include <linux/clk.h>
+
+struct clk_versatile {
+ struct clk clk;
+ unsigned long rate;
+ const struct icst307_params params;
+ u32 oscoff;
+ void (*setvco)(struct clk_versatile *,
+ struct icst307_vco);
};
+
+extern struct clk_operations clk_versatile_operations;
+
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index e13be7c..b6964bc 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -379,16 +379,8 @@ static struct mmci_platform_data mmc0_plat_data = {
/*
* Clock handling
*/
-static const struct icst307_params versatile_oscvco_params = {
- .ref = 24000,
- .vco_max = 200000,
- .vd_min = 4 + 8,
- .vd_max = 511 + 8,
- .rd_min = 1 + 2,
- .rd_max = 127 + 2,
-};
-static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
+static void versatile_oscvco_set(struct clk_versatile *clk, struct icst307_vco vco)
{
void __iomem *sys = __io_address(VERSATILE_SYS_BASE);
void __iomem *sys_lock = sys + VERSATILE_SYS_LOCK_OFFSET;
@@ -402,47 +394,55 @@ static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
writel(0, sys_lock);
}
-static struct clk osc4_clk = {
- .params = &versatile_oscvco_params,
- .oscoff = VERSATILE_SYS_OSCCLCD_OFFSET,
- .setvco = versatile_oscvco_set,
+static struct clk_versatile osc4_clk = {
+ .clk = {
+ .ops = &clk_versatile_operations,
+ },
+ .params = {
+ .ref = 24000,
+ .vco_max = 200000,
+ .vd_min = 4 + 8,
+ .vd_max = 511 + 8,
+ .rd_min = 1 + 2,
+ .rd_max = 127 + 2,
+ },
+ .oscoff = VERSATILE_SYS_OSCCLCD_OFFSET,
+ .setvco = versatile_oscvco_set,
};
/*
* These are fixed clocks.
*/
-static struct clk ref24_clk = {
- .rate = 24000000,
-};
+static struct clk_fixed ref24_clk = DEFINE_CLK_FIXED(24000000);
static struct clk_lookup lookups[] = {
{ /* UART0 */
.dev_id = "dev:f1",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* UART1 */
.dev_id = "dev:f2",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* UART2 */
.dev_id = "dev:f3",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* UART3 */
.dev_id = "fpga:09",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* KMI0 */
.dev_id = "fpga:06",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* KMI1 */
.dev_id = "fpga:07",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* MMC0 */
.dev_id = "fpga:05",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* MMC1 */
.dev_id = "fpga:0b",
- .clk = &ref24_clk,
+ .clk = &ref24_clk.clk,
}, { /* CLCD */
.dev_id = "dev:20",
- .clk = &osc4_clk,
+ .clk = &osc4_clk.clk,
}
};
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