From cf2a82d7462e8c728260ee09e46c573fab2f89cf Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Fri, 7 Oct 2011 00:53:09 -0600 Subject: [PATCH] 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 Signed-off-by: Paul Walmsley --- arch/arm/mach-omap2/clock44xx_data.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) 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 = { -- 2.11.0