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[ARM] omap: eliminate unnecessary conditionals in omap2_clk_wait_ready

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Rather than employing run-time tests in omap2_clk_wait_ready() to
decide whether we need to wait for the clock to become ready, we
can set the .ops appropriately.

This change deals with the OMAP24xx and OMAP34xx conditionals only.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2008-11-04 18:59:32 +00:00 committed by Russell King
parent b36ee72420
commit bc51da4ee4
4 changed files with 35 additions and 32 deletions
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42
arch/arm/mach-omap2/clock.c
View File

@ -237,23 +237,6 @@ static void omap2_clk_wait_ready(struct clk *clk)
else
return;
/* REVISIT: What are the appropriate exclusions for 34XX? */
/* No check for DSS or cam clocks */
if (cpu_is_omap24xx() && ((u32)reg & 0x0f) == 0) { /* CM_{F,I}CLKEN1 */
if (clk->enable_bit == OMAP24XX_EN_DSS2_SHIFT ||
clk->enable_bit == OMAP24XX_EN_DSS1_SHIFT ||
clk->enable_bit == OMAP24XX_EN_CAM_SHIFT)
return;
}
/* REVISIT: What are the appropriate exclusions for 34XX? */
/* OMAP3: ignore DSS-mod clocks */
if (cpu_is_omap34xx() &&
(((u32)reg & ~0xff) == (u32)OMAP_CM_REGADDR(OMAP3430_DSS_MOD, 0) ||
((((u32)reg & ~0xff) == (u32)OMAP_CM_REGADDR(CORE_MOD, 0)) &&
clk->enable_bit == OMAP3430_EN_SSI_SHIFT)))
return;
/* Check if both functional and interface clocks
* are running. */
bit = 1 << clk->enable_bit;
@ -264,7 +247,7 @@ static void omap2_clk_wait_ready(struct clk *clk)
omap2_wait_clock_ready(st_reg, bit, clk->name);
}
static int omap2_dflt_clk_enable_wait(struct clk *clk)
static int omap2_dflt_clk_enable(struct clk *clk)
{
u32 regval32;
@ -282,11 +265,25 @@ static int omap2_dflt_clk_enable_wait(struct clk *clk)
__raw_writel(regval32, clk->enable_reg);
wmb();
omap2_clk_wait_ready(clk);
return 0;
}
static int omap2_dflt_clk_enable_wait(struct clk *clk)
{
int ret;
if (unlikely(clk->enable_reg == NULL)) {
printk(KERN_ERR "clock.c: Enable for %s without enable code\n",
clk->name);
return 0; /* REVISIT: -EINVAL */
}
ret = omap2_dflt_clk_enable(clk);
if (ret == 0)
omap2_clk_wait_ready(clk);
return ret;
}
static void omap2_dflt_clk_disable(struct clk *clk)
{
u32 regval32;
@ -315,6 +312,11 @@ const struct clkops clkops_omap2_dflt_wait = {
.disable = omap2_dflt_clk_disable,
};
const struct clkops clkops_omap2_dflt = {
.enable = omap2_dflt_clk_enable,
.disable = omap2_dflt_clk_disable,
};
/* Enables clock without considering parent dependencies or use count
* REVISIT: Maybe change this to use clk->enable like on omap1?
*/

1
arch/arm/mach-omap2/clock.h
View File

@ -52,6 +52,7 @@ int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
void omap2_clk_prepare_for_reboot(void);
extern const struct clkops clkops_omap2_dflt_wait;
extern const struct clkops clkops_omap2_dflt;
extern u8 cpu_mask;

10
arch/arm/mach-omap2/clock24xx.h
View File

@ -1455,7 +1455,7 @@ static const struct clksel dss1_fck_clksel[] = {
static struct clk dss_ick = { /* Enables both L3,L4 ICLK's */
.name = "dss_ick",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &l4_ck, /* really both l3 and l4 */
.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X,
.clkdm_name = "dss_clkdm",
@ -1466,7 +1466,7 @@ static struct clk dss_ick = { /* Enables both L3,L4 ICLK's */
static struct clk dss1_fck = {
.name = "dss1_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &core_ck, /* Core or sys */
.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X |
DELAYED_APP,
@ -1500,7 +1500,7 @@ static const struct clksel dss2_fck_clksel[] = {
static struct clk dss2_fck = { /* Alt clk used in power management */
.name = "dss2_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &sys_ck, /* fixed at sys_ck or 48MHz */
.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X |
DELAYED_APP,
@ -2206,7 +2206,7 @@ static struct clk icr_ick = {
static struct clk cam_ick = {
.name = "cam_ick",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &l4_ck,
.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X,
.clkdm_name = "core_l4_clkdm",
@ -2222,7 +2222,7 @@ static struct clk cam_ick = {
*/
static struct clk cam_fck = {
.name = "cam_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &func_96m_ck,
.flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X,
.clkdm_name = "core_l3_clkdm",

14
arch/arm/mach-omap2/clock34xx.h
View File

@ -1652,7 +1652,7 @@ static const struct clksel ssi_ssr_clksel[] = {
static struct clk ssi_ssr_fck = {
.name = "ssi_ssr_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.init = &omap2_init_clksel_parent,
.enable_reg = OMAP_CM_REGADDR(CORE_MOD, CM_FCLKEN1),
.enable_bit = OMAP3430_EN_SSI_SHIFT,
@ -2064,7 +2064,7 @@ static struct clk ssi_l4_ick = {
static struct clk ssi_ick = {
.name = "ssi_ick",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &ssi_l4_ick,
.enable_reg = OMAP_CM_REGADDR(CORE_MOD, CM_ICLKEN1),
.enable_bit = OMAP3430_EN_SSI_SHIFT,
@ -2156,7 +2156,7 @@ static const struct clksel dss1_alwon_fck_clksel[] = {
static struct clk dss1_alwon_fck = {
.name = "dss1_alwon_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &dpll4_m4x2_ck,
.init = &omap2_init_clksel_parent,
.enable_reg = OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_FCLKEN),
@ -2171,7 +2171,7 @@ static struct clk dss1_alwon_fck = {
static struct clk dss_tv_fck = {
.name = "dss_tv_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &omap_54m_fck,
.init = &omap2_init_clk_clkdm,
.enable_reg = OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_FCLKEN),
@ -2183,7 +2183,7 @@ static struct clk dss_tv_fck = {
static struct clk dss_96m_fck = {
.name = "dss_96m_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &omap_96m_fck,
.init = &omap2_init_clk_clkdm,
.enable_reg = OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_FCLKEN),
@ -2195,7 +2195,7 @@ static struct clk dss_96m_fck = {
static struct clk dss2_alwon_fck = {
.name = "dss2_alwon_fck",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &sys_ck,
.init = &omap2_init_clk_clkdm,
.enable_reg = OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_FCLKEN),
@ -2208,7 +2208,7 @@ static struct clk dss2_alwon_fck = {
static struct clk dss_ick = {
/* Handles both L3 and L4 clocks */
.name = "dss_ick",
.ops = &clkops_omap2_dflt_wait,
.ops = &clkops_omap2_dflt,
.parent = &l4_ick,
.init = &omap2_init_clk_clkdm,
.enable_reg = OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_ICLKEN),