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ARM: OMAP4: clock: Add missing clock divider for OCP_ABE_ICLK

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The parent clock of the OCP_ABE_ICLK is the AESS_FCLK and the
parent clock of the AESS_FCLK is the ABE_FCLK...

ABE_FCLK --> AESS_FCLK --> OCP_ABE_ICLK

The AESS_FCLK and OCP_ABE_ICLK clocks both have dividers which
determine their operational frequency. However, the dividers for
the AESS_FCLK and OCP_ABE_ICLK are controlled via a single bit,
which is the CM1_ABE_AESS_CLKCTRL[24] bit. When this bit is set to
0, the AESS_FCLK divider is 1 and the OCP_ABE_ICLK divider is 2.
Similarly, when this bit is set to 1, the AESS_FCLK divider is 2
and the OCP_ABE_ICLK is 1.

The above relationship between the AESS_FCLK and OCP_ABE_ICLK
dividers ensure that the OCP_ABE_ICLK clock is always half the
frequency of the ABE_CLK...

OCP_ABE_ICLK = ABE_FCLK/2

The divider for the OCP_ABE_ICLK is currently missing so add a
divider that will ensure the OCP_ABE_ICLK frequency is always half
the ABE_FCLK frequency.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Jon Hunter 2011-10-07 00:53:09 -06:00 committed by Paul Walmsley
parent 52a3a4d461
commit cf2a82d746
1 changed files with 15 additions and 1 deletions
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16
arch/arm/mach-omap2/clock44xx_data.c
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@ -1195,11 +1195,25 @@ static struct clk l4_wkup_clk_mux_ck = {
.recalc = &omap2_clksel_recalc,
};
static const struct clksel_rate div2_2to1_rates[] = {
{ .div = 1, .val = 1, .flags = RATE_IN_4430 },
{ .div = 2, .val = 0, .flags = RATE_IN_4430 },
{ .div = 0 },
};
static const struct clksel ocp_abe_iclk_div[] = {
{ .parent = &aess_fclk, .rates = div2_2to1_rates },
{ .parent = NULL },
};
static struct clk ocp_abe_iclk = {
.name = "ocp_abe_iclk",
.parent = &aess_fclk,
.clksel = ocp_abe_iclk_div,
.clksel_reg = OMAP4430_CM1_ABE_AESS_CLKCTRL,
.clksel_mask = OMAP4430_CLKSEL_AESS_FCLK_MASK,
.ops = &clkops_null,
.recalc = &followparent_recalc,
.recalc = &omap2_clksel_recalc,
};
static struct clk per_abe_24m_fclk = {