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authorJon Hunter <jon-hunter@ti.com>2011-10-07 08:53:09 +0200
committerPaul Walmsley <paul@pwsan.com>2011-10-07 09:06:48 +0200
commitcf2a82d7462e8c728260ee09e46c573fab2f89cf (patch)
tree5937a03d039c2713de65926c14a3b039001faa49 /arch/arm
parentARM: OMAP4460: Clock: Adding support for 4460 specific clocks (diff)
downloadlinux-cf2a82d7462e8c728260ee09e46c573fab2f89cf.tar.xz
linux-cf2a82d7462e8c728260ee09e46c573fab2f89cf.zip
ARM: OMAP4: clock: Add missing clock divider for OCP_ABE_ICLK
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-omap2/clock44xx_data.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/clock44xx_data.c b/arch/arm/mach-omap2/clock44xx_data.c
index 7b028ecce37a..a145e322635f 100644
--- a/arch/arm/mach-omap2/clock44xx_data.c
+++ b/arch/arm/mach-omap2/clock44xx_data.c
@@ -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 = {