clk: ti: Improve clksel clock bit parsing for reg property

Because of legacy reasons, the TI clksel composite clocks can have
overlapping reg properties, and use a custom ti,bit-shift property.

For

clk: ti: Improve clksel clock bit parsing for reg property

Because of legacy reasons, the TI clksel composite clocks can have
overlapping reg properties, and use a custom ti,bit-shift property.

For the clksel clocks we can start using of the standard reg property
instead of the custom ti,bit-shift property.

To do this, let's add a ti_clk_get_legacy_bit_shift() helper, and make
ti_clk_get_reg_addr() populate the clock bit offset.

This makes it possible to update the devicetree files to use the reg
property one clock at a time.

Acked-by: Stephen Boyd <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

show more ...

treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_320.RULE

Based on the normalized pattern:

this program is free software you can redistribute it and/or modify it
under the

treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_320.RULE

Based on the normalized pattern:

this program is free software you can redistribute it and/or modify it
under the terms of the gnu general public license version 2 as
published by the free software foundation this program is distributed
as is without any warranty of any kind whether express or implied
without even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Reviewed-by: Allison Randal <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

clk: ti: add am33xx/am43xx spread spectrum clock support

The patch enables spread spectrum clocking (SSC) for MPU and LCD PLLs.
As reported by the TI spruh73x/spruhl7x RM, SSC is only supported for

clk: ti: add am33xx/am43xx spread spectrum clock support

The patch enables spread spectrum clocking (SSC) for MPU and LCD PLLs.
As reported by the TI spruh73x/spruhl7x RM, SSC is only supported for
the DISP/LCD and MPU PLLs on am33xx/am43xx. SSC is not supported for
DDR, PER, and CORE PLLs.

Calculating the required values and setting the registers accordingly
was taken from the set_mpu_spreadspectrum routine contained in the
arch/arm/mach-omap2/am33xx/clock_am33xx.c file of the u-boot project.

In locked condition, DPLL output clock = CLKINP *[M/N]. In case of
SSC enabled, the reference manual explains that there is a restriction
of range of M values. Since the omap2_dpll_round_rate routine attempts
to select the minimum possible N, the value of M obtained is not
guaranteed to be within the range required. With the new "ti,min-div"
parameter it is possible to increase N and consequently M to satisfy the
constraint imposed by SSC.

Signed-off-by: Dario Binacchi <[email protected]>
Reviewed-by: Tero Kristo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

clk: ti: clkctrl: add new exported API for checking standby info

Standby status is provided for certain clkctrl clocks to see if the
given module has entered standby or not. This is mostly needed by

clk: ti: clkctrl: add new exported API for checking standby info

Standby status is provided for certain clkctrl clocks to see if the
given module has entered standby or not. This is mostly needed by
remoteproc code to see if the remoteproc has entered standby and the clock
can be turned off safely.

Signed-off-by: Tero Kristo <[email protected]>

show more ...

clk: ti: clkctrl: convert to use bit helper macros instead of bitops

This improves the readibility of the code slightly, and makes modifying
the flags bit simpler.

Signed-off-by: Tero Kristo <t-kri

clk: ti: clkctrl: convert to use bit helper macros instead of bitops

This improves the readibility of the code slightly, and makes modifying
the flags bit simpler.

Signed-off-by: Tero Kristo <[email protected]>

show more ...

clk: ti: dra7: disable the RNG and TIMER12 clkctrl clocks on HS devices

RNG and TIMER12 are reserved for secure side usage only on HS devices,
so disable their clkctrl clocks on HS SoCs also.

Signe

clk: ti: dra7: disable the RNG and TIMER12 clkctrl clocks on HS devices

RNG and TIMER12 are reserved for secure side usage only on HS devices,
so disable their clkctrl clocks on HS SoCs also.

Signed-off-by: Tero Kristo <[email protected]>
Tested-by: Andrew F. Davis <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

clk: ti: export the omap2_clk_is_hw_omap call

There is one instance outside the TI clock driver that needs the info
whether a clock is an OMAP HW clock or not. Thus, move the function
declaration in

clk: ti: export the omap2_clk_is_hw_omap call

There is one instance outside the TI clock driver that needs the info
whether a clock is an OMAP HW clock or not. Thus, move the function
declaration into the public header.

Signed-off-by: Tero Kristo <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

clk: ti: add a usecount for autoidle

Multiple users might deny autoidle on a clock. So we should have some
counting here, also according to the comment in _setup_iclk_autoidle().
Also setting autoi

clk: ti: add a usecount for autoidle

Multiple users might deny autoidle on a clock. So we should have some
counting here, also according to the comment in _setup_iclk_autoidle().
Also setting autoidle regs is not atomic, so there is another reason
for locking.

Signed-off-by: Andreas Kemnade <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Tested-by: Keerthy <[email protected]>
Signed-off-by: Tero Kristo <[email protected]>

show more ...

clk: ti: Add functions to save/restore clk context

SoCs like AM43XX lose clock registers context during RTC-only
suspend. Hence add functions to save/restore the clock registers
context.

Signed-off

clk: ti: Add functions to save/restore clk context

SoCs like AM43XX lose clock registers context during RTC-only
suspend. Hence add functions to save/restore the clock registers
context.

Signed-off-by: Keerthy <[email protected]>
Signed-off-by: Russ Dill <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Tero Kristo <[email protected]>

show more ...

clk: ti: clkctrl: support multiple clkctrl nodes under a cm node

Currently, only one clkctrl node can be added under a specific CM node
due to limitation with the implementation. Modify the code to

clk: ti: clkctrl: support multiple clkctrl nodes under a cm node

Currently, only one clkctrl node can be added under a specific CM node
due to limitation with the implementation. Modify the code to pick-up
clockdomain name from the clkctrl node instead of CM node if provided.
Also, add a new flag to the TI clock driver so that both modes can
be supported simultaneously.

Signed-off-by: Tero Kristo <[email protected]>
Tested-by: Tony Lindgren <[email protected]>

show more ...

ARM: omap2+: control: add support for auxiliary control module instances

Control module can have multiple instances in a system, each with separate
address space and features. Add base support for t

ARM: omap2+: control: add support for auxiliary control module instances

Control module can have multiple instances in a system, each with separate
address space and features. Add base support for these auxiliary instances,
with support for syscon and clock mappings under them.

Signed-off-by: Tero Kristo <[email protected]>
Tested-by: Peter Ujfalusi <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: add support for register read-modify-write low-level operation

Useful for changing few bits on a register, this makes sure for example
that the operation is done atomically in case of sysco

clk: ti: add support for register read-modify-write low-level operation

Useful for changing few bits on a register, this makes sure for example
that the operation is done atomically in case of syscon.

Signed-off-by: Tero Kristo <[email protected]>

show more ...

clk: ti: convert to use proper register definition for all accesses

Currently, TI clock driver uses an encapsulated struct that is cast into
a void pointer to store all register addresses. This can

clk: ti: convert to use proper register definition for all accesses

Currently, TI clock driver uses an encapsulated struct that is cast into
a void pointer to store all register addresses. This can be considered
as rather nasty hackery, and prevents from expanding the register
address field also. Instead, replace all the code to use proper struct
in place for this, which contains all the previously used data.

This patch is rather large as it is touching multiple files, but this
can't be split up as we need to avoid any boot breakage.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: drop unnecessary MEMMAP_ADDRESSING flag

This has been superceded by the usage of ti_clk_ll_ops for now.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]

clk: ti: drop unnecessary MEMMAP_ADDRESSING flag

This has been superceded by the usage of ti_clk_ll_ops for now.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: move omap2_init_clk_clkdm under TI clock driver

This is not needed outside the driver, so move it inside it and remove
the prototype from the public header also.

Signed-off-by: Tero Kristo

clk: ti: move omap2_init_clk_clkdm under TI clock driver

This is not needed outside the driver, so move it inside it and remove
the prototype from the public header also.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: add clkdm_lookup to the exported functions

This will be needed to move some additional clockdomain functionality
under clock driver.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by:

clk: ti: add clkdm_lookup to the exported functions

This will be needed to move some additional clockdomain functionality
under clock driver.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: remove un-used definitions from public clk_hw_omap struct

Clksel support has been deprecated a while back, so remove these from
the struct also.

Signed-off-by: Tero Kristo <[email protected]

clk: ti: remove un-used definitions from public clk_hw_omap struct

Clksel support has been deprecated a while back, so remove these from
the struct also.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: dpll: add support for specifying max rate for DPLLs

DPLLs typically have a maximum rate they can support, and this varies
from DPLL to DPLL. Add support of the maximum rate value to the DPL

clk: ti: dpll: add support for specifying max rate for DPLLs

DPLLs typically have a maximum rate they can support, and this varies
from DPLL to DPLL. Add support of the maximum rate value to the DPLL
data struct, and also add check for this in the DPLL round_rate function.

Signed-off-by: Tero Kristo <[email protected]>
Reviewed-by: Nishanth Menon <[email protected]>
Cc: Tomi Valkeinen <[email protected]>
Cc: Lokesh Vutla <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

clk: ti: dpll: convert DPLL support code to use clk_hw instead of clk ptrs

Convert DPLL support code to use clk_hw pointers for reference and bypass
clocks. This allows us to use clk_hw_* APIs for a

clk: ti: dpll: convert DPLL support code to use clk_hw instead of clk ptrs

Convert DPLL support code to use clk_hw pointers for reference and bypass
clocks. This allows us to use clk_hw_* APIs for accessing any required
parameters for these clocks, avoiding some locking problems at least with
DPLL enable code; this used clk_get_rate which uses mutex but isn't
good under clk_enable / clk_disable.

Signed-off-by: Tero Kristo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

ARM: OMAP2+: Add DPPLS clock manager for dm814x

On dm814x we have some clocks at DPLLS and some at PRCM. Let's add a new
omap_prcm_init_data entry for the DPLLS so we can initalize timer clocks
earl

ARM: OMAP2+: Add DPPLS clock manager for dm814x

On dm814x we have some clocks at DPLLS and some at PRCM. Let's add a new
omap_prcm_init_data entry for the DPLLS so we can initalize timer clocks
early.

Cc: Paul Walmsley <[email protected]>
Cc: Tero Kristo <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: omap5+: dpll: implement errata i810

Errata i810 states that DPLL controller can get stuck while transitioning
to a power saving state, while its M/N ratio is being re-programmed.

As a work

clk: ti: omap5+: dpll: implement errata i810

Errata i810 states that DPLL controller can get stuck while transitioning
to a power saving state, while its M/N ratio is being re-programmed.

As a workaround, before re-programming the M/N ratio, SW has to ensure
the DPLL cannot start an idle state transition. SW can disable DPLL
idling by setting the DPLL AUTO_DPLL_MODE=0 or keeping a clock request
active by setting a dependent clock domain in SW_WKUP.

This errata impacts OMAP5 and DRA7 chips, so enable the errata for these.

Signed-off-by: Tero Kristo <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

clk: change clk_ops' ->determine_rate() prototype

Clock rates are stored in an unsigned long field, but ->determine_rate()
(which returns a rounded rate from a requested one) returns a long
value (e

clk: change clk_ops' ->determine_rate() prototype

Clock rates are stored in an unsigned long field, but ->determine_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.

Change ->determine_rate() prototype to return 0 or an error code, and pass
a pointer to a clk_rate_request structure containing the expected target
rate and the rate constraints imposed by clk users.

The clk_rate_request structure might be extended in the future to contain
other kind of constraints like the rounding policy, the maximum clock
inaccuracy or other things that are not yet supported by the CCF
(power consumption constraints ?).

Signed-off-by: Boris Brezillon <[email protected]>
CC: Jonathan Corbet <[email protected]>
CC: Tony Lindgren <[email protected]>
CC: Ralf Baechle <[email protected]>
CC: "Emilio López" <[email protected]>
CC: Maxime Ripard <[email protected]>
Acked-by: Tero Kristo <[email protected]>
CC: Peter De Schrijver <[email protected]>
CC: Prashant Gaikwad <[email protected]>
CC: Stephen Warren <[email protected]>
CC: Thierry Reding <[email protected]>
CC: Alexandre Courbot <[email protected]>
CC: [email protected]
CC: [email protected]
CC: [email protected]
CC: [email protected]
CC: [email protected]
CC: [email protected]
[[email protected]: Fix parent dereference problem in
__clk_determine_rate()]
Signed-off-by: Stephen Boyd <[email protected]>
Tested-by: Romain Perier <[email protected]>
Signed-off-by: Heiko Stuebner <[email protected]>
[[email protected]: Folded in fix from Heiko for fixed-rate
clocks without parents or a rate determining op]
Signed-off-by: Stephen Boyd <[email protected]>

show more ...

ARM: OMAP2+: Add support for initializing dm814x clocks

Let's add a minimal clocks for dm814x to get it booted. This is
mostly a placeholder and relies on the PLLs being on from the
bootloader.

Not

ARM: OMAP2+: Add support for initializing dm814x clocks

Let's add a minimal clocks for dm814x to get it booted. This is
mostly a placeholder and relies on the PLLs being on from the
bootloader.

Note that the divider clocks work the same way as on dm816x and
am335x.

Cc: Matthijs van Duin <[email protected]>
Cc: Mike Turquette <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Stephen Boyd <[email protected]>
Cc: Tero Kristo <[email protected]>
Acked-by: Stephen Boyd <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

show more ...

clk: ti: move low-level access and init code under clock driver

With most of the clock code under clock driver already, the low-level
register access code, and the init code for the same, is no long

clk: ti: move low-level access and init code under clock driver

With most of the clock code under clock driver already, the low-level
register access code, and the init code for the same, is no longer
needed outside the clock driver. Thus, these can be moved under clock
driver also.

Signed-off-by: Tero Kristo <[email protected]>

show more ...

clk: ti: remove exported ll_ops struct, instead add an API for registration

We should avoid exporting data from drivers, instead use an API for
registering the clock low level operations.

Signed-of

clk: ti: remove exported ll_ops struct, instead add an API for registration

We should avoid exporting data from drivers, instead use an API for
registering the clock low level operations.

Signed-off-by: Tero Kristo <[email protected]>

show more ...