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Date: Mon, 12 Dec 2011 15:02:02 -0700
From: Grant Likely <grant.likely@...retlab.ca>
To: linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Cc: Mike Turquette <mturquette@...com>,
Sascha Hauer <kernel@...gutronix.de>,
Rob Herring <rob.herring@...xeda.com>,
Shawn Guo <shawn.guo@...escale.com>,
Grant Likely <grant.likely@...retlab.ca>,
Russell King <linux@....linux.org.uk>
Subject: [RFC v2 2/9] arm/versatile*: Consolidate clk_ops and setvco implementations.
All of the icst setvco routines for ARM development boards are pretty close
to identical. Consolidate them all to one implementation.
Note: This might be broken on Integrator. To simplify the common function,
it always does a read/modify/write on the register. Integrator only does
a simple write without preserving some of the bits in the old value.
Russell, if this will break Integrator, then I can do it slightly differently
to avoid the problem.
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
Cc: Russell King <linux@....linux.org.uk>
Cc: Mike Turquette <mturquette@...com>
---
arch/arm/mach-integrator/impd1.c | 30 ++-----------------------
arch/arm/mach-integrator/integrator_cp.c | 21 +----------------
arch/arm/mach-realview/core.c | 22 +-----------------
arch/arm/mach-versatile/core.c | 22 +-----------------
arch/arm/plat-versatile/clock.c | 21 ++++++++++++++++++
arch/arm/plat-versatile/include/plat/clock.h | 4 ++-
6 files changed, 33 insertions(+), 87 deletions(-)
diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c
index 8cbb75a..a42f6bd 100644
--- a/arch/arm/mach-integrator/impd1.c
+++ b/arch/arm/mach-integrator/impd1.c
@@ -52,31 +52,6 @@ static const struct icst_params impd1_vco_params = {
.idx2s = icst525_idx2s,
};
-static void impd1_setvco(struct clk *clk, struct icst_vco vco)
-{
- struct impd1_module *impd1 = clk->data;
- u32 val = vco.v | (vco.r << 9) | (vco.s << 16);
-
- writel(0xa05f, impd1->base + IMPD1_LOCK);
- writel(val, clk->vcoreg);
- writel(0, impd1->base + IMPD1_LOCK);
-
-#ifdef DEBUG
- vco.v = val & 0x1ff;
- vco.r = (val >> 9) & 0x7f;
- vco.s = (val >> 16) & 7;
-
- pr_debug("IM-PD1: VCO%d clock is %ld Hz\n",
- vconr, icst525_hz(&impd1_vco_params, vco));
-#endif
-}
-
-static const struct clk_ops impd1_clk_ops = {
- .round = icst_clk_round,
- .set = icst_clk_set,
- .setvco = impd1_setvco,
-};
-
void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
{
struct impd1_module *impd1 = dev_get_drvdata(dev);
@@ -377,13 +352,14 @@ static int impd1_probe(struct lm_device *dev)
(unsigned long)dev->resource.start);
for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
- impd1->vcos[i].ops = &impd1_clk_ops,
+ impd1->vcos[i].ops = &icst_clk_default_ops,
impd1->vcos[i].owner = THIS_MODULE,
impd1->vcos[i].params = &impd1_vco_params,
- impd1->vcos[i].data = impd1;
}
impd1->vcos[0].vcoreg = impd1->base + IMPD1_OSC1;
+ impd1->vcos[0].lockreg = impd1->base + IMPD1_LOCK;
impd1->vcos[1].vcoreg = impd1->base + IMPD1_OSC2;
+ impd1->vcos[1].lockreg = impd1->base + IMPD1_LOCK;
impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
dev->id);
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 5de49c3..3342926 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -205,28 +205,11 @@ static const struct icst_params cp_auxvco_params = {
.idx2s = icst525_idx2s,
};
-static void cp_auxvco_set(struct clk *clk, struct icst_vco vco)
-{
- u32 val;
-
- val = readl(clk->vcoreg) & ~0x7ffff;
- val |= vco.v | (vco.r << 9) | (vco.s << 16);
-
- writel(0xa05f, CM_LOCK);
- writel(val, clk->vcoreg);
- writel(0, CM_LOCK);
-}
-
-static const struct clk_ops cp_auxclk_ops = {
- .round = icst_clk_round,
- .set = icst_clk_set,
- .setvco = cp_auxvco_set,
-};
-
static struct clk cp_auxclk = {
- .ops = &cp_auxclk_ops,
+ .ops = &icst_clk_default_ops,
.params = &cp_auxvco_params,
.vcoreg = CM_AUXOSC,
+ .lockreg= CM_LOCK,
};
static struct clk sp804_clk = {
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index d5ed5d4..41b2f91 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -242,27 +242,8 @@ static const struct icst_params realview_oscvco_params = {
.idx2s = icst307_idx2s,
};
-static void realview_oscvco_set(struct clk *clk, struct icst_vco vco)
-{
- void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET;
- u32 val;
-
- val = readl(clk->vcoreg) & ~0x7ffff;
- val |= vco.v | (vco.r << 9) | (vco.s << 16);
-
- writel(0xa05f, sys_lock);
- writel(val, clk->vcoreg);
- writel(0, sys_lock);
-}
-
-static const struct clk_ops oscvco_clk_ops = {
- .round = icst_clk_round,
- .set = icst_clk_set,
- .setvco = realview_oscvco_set,
-};
-
static struct clk oscvco_clk = {
- .ops = &oscvco_clk_ops,
+ .ops = &icst_clk_default_ops,
.params = &realview_oscvco_params,
};
@@ -333,6 +314,7 @@ void __init realview_init_early(void)
oscvco_clk.vcoreg = sys + REALVIEW_SYS_OSC0_OFFSET;
else
oscvco_clk.vcoreg = sys + REALVIEW_SYS_OSC4_OFFSET;
+ oscvco_clk.lockreg = sys + REALVIEW_SYS_LOCK_OFFSET;
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index e340a54..47f4531 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -337,27 +337,8 @@ static const struct icst_params versatile_oscvco_params = {
.idx2s = icst307_idx2s,
};
-static void versatile_oscvco_set(struct clk *clk, struct icst_vco vco)
-{
- void __iomem *sys_lock = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LOCK_OFFSET;
- u32 val;
-
- val = readl(clk->vcoreg) & ~0x7ffff;
- val |= vco.v | (vco.r << 9) | (vco.s << 16);
-
- writel(0xa05f, sys_lock);
- writel(val, clk->vcoreg);
- writel(0, sys_lock);
-}
-
-static const struct clk_ops osc4_clk_ops = {
- .round = icst_clk_round,
- .set = icst_clk_set,
- .setvco = versatile_oscvco_set,
-};
-
static struct clk osc4_clk = {
- .ops = &osc4_clk_ops,
+ .ops = &icst_clk_default_ops,
.params = &versatile_oscvco_params,
};
@@ -751,6 +732,7 @@ void __init versatile_init_early(void)
void __iomem *sys = __io_address(VERSATILE_SYS_BASE);
osc4_clk.vcoreg = sys + VERSATILE_SYS_OSCCLCD_OFFSET;
+ osc4_clk.lockreg = sys + VERSATILE_SYS_LOCK_OFFSET;
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
versatile_sched_clock_init(sys + VERSATILE_SYS_24MHz_OFFSET, 24000000);
diff --git a/arch/arm/plat-versatile/clock.c b/arch/arm/plat-versatile/clock.c
index 5c8b656..98a9dd8 100644
--- a/arch/arm/plat-versatile/clock.c
+++ b/arch/arm/plat-versatile/clock.c
@@ -12,6 +12,7 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/clk.h>
+#include <linux/io.h>
#include <linux/mutex.h>
#include <asm/hardware/icst.h>
@@ -53,6 +54,19 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
}
EXPORT_SYMBOL(clk_set_rate);
+void icst_clk_setvco(struct clk *clk, struct icst_vco vco)
+{
+ u32 val;
+
+ val = readl(clk->vcoreg) & ~0x7ffff;
+ val |= vco.v | (vco.r << 9) | (vco.s << 16);
+
+ writel(0xa05f, clk->lockreg);
+ writel(val, clk->vcoreg);
+ writel(0, clk->lockreg);
+}
+EXPORT_SYMBOL(icst_clk_setvco);
+
long icst_clk_round(struct clk *clk, unsigned long rate)
{
struct icst_vco vco;
@@ -72,3 +86,10 @@ int icst_clk_set(struct clk *clk, unsigned long rate)
return 0;
}
EXPORT_SYMBOL(icst_clk_set);
+
+const struct clk_ops icst_clk_default_ops = {
+ .round = icst_clk_round,
+ .set = icst_clk_set,
+ .setvco = icst_clk_setvco,
+};
+EXPORT_SYMBOL(icst_clk_default_ops);
diff --git a/arch/arm/plat-versatile/include/plat/clock.h b/arch/arm/plat-versatile/include/plat/clock.h
index 2117701..5749f79 100644
--- a/arch/arm/plat-versatile/include/plat/clock.h
+++ b/arch/arm/plat-versatile/include/plat/clock.h
@@ -10,9 +10,9 @@ struct clk {
const struct clk_ops *ops;
const struct icst_params *params;
void __iomem *vcoreg;
+ void __iomem *lockreg;
#ifdef CONFIG_ARCH_INTEGRATOR
struct module *owner;
- void *data;
#endif
};
@@ -22,8 +22,10 @@ struct clk_ops {
void (*setvco)(struct clk *, struct icst_vco);
};
+void icst_clk_setvco(struct clk *clk, struct icst_vco vco);
int icst_clk_set(struct clk *, unsigned long);
long icst_clk_round(struct clk *, unsigned long);
+extern const struct clk_ops icst_clk_default_ops;
#ifdef CONFIG_ARCH_INTEGRATOR
static inline int __clk_get(struct clk *clk)
--
1.7.5.4
--
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