The IVA DPLL is not an essential DPLL for the functionality of a
bootloader and is usually not configured (e.g. older u-boots configure
it only if CONFIG_SYS_CLOCKS_ENABLE_ALL is enabled and u-boots newer
than 2014.01 do not even have an option), and this results in incorrect
operating frequencies when trying to use a DSP or IVAHD, whose root
clocks are derived from this DPLL. Use the DT standard properties
"assigned-clocks" and "assigned-clock-rates" to set the IVA DPLL clock
rate and the rates for its derivative clocks at boot time to properly
initialize/lock this DPLL. The DPLL will automatically transition
into a low-power stop mode when the associated output clocks are
not utilized or gated automatically.
The reset values of the dividers H11 & H12 (functional clocks for DSP
and IVAHD respectively) are identical to each other, but are different
at each OPP. The reset values also do not match a specific OPP. So, the
derived output clocks from the IVA DPLL have to be initialized as well
to avoid initializing these divider outputs to incorrect frequencies.
The clock rates are chosen based on the OPP_NOM values as defined in
the OMAP5432 SR2.0 Data Manual Book vK, section 5.2.3.5 "DPLL_IVA
Preferred Settings". The recommended maximum DPLL locked frequency is
2330 MHz for OPP_NOM (value for DPLL_IVA_X2_CLK), so the dpll_iva_ck
clock rate used is half of this value. The value 465.92 MHz is used
instead of 465.9 MHz for dpll_iva_h11x2_ck so that proper divider
value can be calculated.
Signed-off-by: Suman Anna <s-anna@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Upcoming change to DT compiler is going to complain about nodes
which have a reg property, but have not defined the address in their
name. This patch fixes following type of warnings for OMAP5 clock nodes:
Warning (unit_address_vs_reg): Node /ocp/cm@48004000/clocks/dpll3_m2_ck
has a reg or ranges property, but no unit name
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Fixes 85dc74e9 (ARM: dts: omap5 clock data)
On OMAP54xx, For DPLL_IVA, the ref clock(CLKINP) is connected to sys_clk1 and
the bypass input(CLKINPULOW) is connected to iva_dpll_hs_clk_div clock.
But the bypass input is not directly routed to bypass clkout instead
both CLKINP and CLKINPULOW are connected to bypass clkout via a mux.
This mux is controlled by the bit - CM_CLKSEL_DPLL_IVA[23]:DPLL_BYP_CLKSEL
and it's POR value is zero which selects the CLKINP as bypass clkout.
which means iva_dpll_hs_clk_div is not the bypass clock for dpll_iva_ck
Fix this by adding another mux clock as parent in bypass mode.
This design is common to most of the PLLs and the rest have only one bypass
clock. Below is a list of the DPLLs that need this fix:
DPLL_IVA,
DPLL_PER,
DPLL_USB and DPLL_CORE
Signed-off-by: Ravikumar Kattekola <rk@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Similarly to DRA7, OMAP5 has l3 and l4 clock rates incorrectly calculated.
Fixed by using proper divider clock types for the clock nodes.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
OMAP5432, DRA75x and DRA72x have MPU DPLLs that need Duty Cycle
Correction(DCC) to operate safely at frequencies >= 1.4GHz.
Switch to "ti,omap5-mpu-dpll-clock" compatible property which provides
this support.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Add ti,set-rate-parent to dss_dss_clk so that the DSS driver can
set the rate.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
abe_iclk's parent is aess_fclk and not abe_clk.
Also correct the parameters for clock rate calculation as used for OMAP4
since in PRCM level there's no difference between the two platform
regarding to AESS/ABE clocking.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
In OMAP5 bit 8 in PRCM registers are not defined (Reserved) unlike their
counterpart in OMAP4.
It is better to not write to these bits.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
This patch creates a unique node for each clock in the OMAP5 power,
reset and clock manager (PRCM).
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
