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[ARM] omap: create a proper tree of clocks

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Traditionally, we've tracked the parent/child relationships between
clk structures by setting the child's parent member to point at the
upstream clock.  As a result, when decending the tree, we have had
to scan all clocks to find the children.

Avoid this wasteful scanning by keeping a list of the clock's children.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2009-01-31 10:05:51 +00:00
committed by Russell King
parent b5088c0d90
commit 3f0a820c4c
9 changed files with 74 additions and 128 deletions
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7
arch/arm/mach-omap1/clock.h
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@@ -155,7 +155,6 @@ static struct clk ck_dpll1 = {
.name = "ck_dpll1",
.ops = &clkops_null,
.parent = &ck_ref,
.flags = RATE_PROPAGATES,
};
static struct arm_idlect1_clk ck_dpll1out = {
@@ -163,8 +162,7 @@ static struct arm_idlect1_clk ck_dpll1out = {
.name = "ck_dpll1out",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.flags = CLOCK_IDLE_CONTROL |
ENABLE_REG_32BIT | RATE_PROPAGATES,
.flags = CLOCK_IDLE_CONTROL | ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_CKOUT_ARM,
.recalc = &followparent_recalc,
@@ -187,7 +185,6 @@ static struct clk arm_ck = {
.name = "arm_ck",
.ops = &clkops_null,
.parent = &ck_dpll1,
.flags = RATE_PROPAGATES,
.rate_offset = CKCTL_ARMDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
@@ -328,7 +325,7 @@ static struct arm_idlect1_clk tc_ck = {
.name = "tc_ck",
.ops = &clkops_null,
.parent = &ck_dpll1,
.flags = RATE_PROPAGATES | CLOCK_IDLE_CONTROL,
.flags = CLOCK_IDLE_CONTROL,
.rate_offset = CKCTL_TCDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,