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The fixed_pll of gxbb and gxl also has a fractional parameter. This has
not been a problem so far because the fractional part is actually set
to 0 on these platforms, so the rate remains correct when it is ignored.
Still, it is better represent the pll the way it is, so add the frac
parameter now
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The rate of the parent should not be multiplied by 2 when the pll has a
fractional part. This is making the rate calculation of the gxl_hdmi_pll
wrong (and others as well). This multiplication is specific
to the hdmi_pll of gxbb and is most likely due to a multiplier sitting
in front of this particular pll.
Add a fixed factor clock in front on the gxbb pll and remove this constant
from the calculation to fix the problem
Fixes: 4a47295144dd ("clk: meson: fractional pll support")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The hdmi pll used in the gxl family is actually different from the gxbb
one. The register layout is completely different, which explain why the
hdmi pll rate has always been rubbish on the gxl family.
Adding the correct register field is the first part of the fix to get a
correct rate out the hdmi pll
Fixes: 0d48fc558d01 ("clk: meson-gxbb: Add GXL/GXM GP0 Variant")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Some meson plls, such as the hdmi pll, are using a 3rd od parameter,
which is yet another "power of 2" post divider. Add it to fix the
calculation of the hdmi_pll rate
Fixes: 738f66d3211d ("clk: gxbb: add AmLogic GXBB clk controller driver")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Use the fractional part width in the calculation instead of 12, which
happens to be the witdh right now. This is safer in case the field width
ever change in the future
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The pll driver performs the rate calculation in Mhz, which adds an
unnecessary rounding down to the Mhz of the rate. Use 64bits long
integers to perform this calculation safely on meson8b and perform the
calculation in Hz instead
Fixes: 7a29a869434e ("clk: meson: Add support for Meson clock controller")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Read-only plls don't need param table to recalculate the rate.
Providing them with a param table is just a waste of memory.
Remove the useless tables from sys_pll on gxbb and axg.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Make sure the rate param table is available before using it.
Some read-only plls don't provide it, which is ok since the
table is not used by read-only clocks. R/W clocks are supposed
to provide it, but it does not hurt check it.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
platform_get_resource() may return NULL, add proper
check to avoid potential NULL dereferencing.
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = platform_get_resource(pdev, t, n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Fixes the following sparse warning:
drivers/clk/meson/axg.c:260:25: warning:
symbol 'axg_gp0_params_table' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
In case of error, the function devm_ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.
Fixes: 78b4af312f91 ("clk: meson-axg: add clock controller drivers")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
"rem * SDM_DEN" can easily overflow on the 32-bit Meson8 and Meson8b
SoCs if the "remainder" (after the division operation) is greater than
262143Hz. This is likely to happen since the input clock for the MPLLs
on Meson8 and Meson8b is "fixed_pll", which is running at a rate of
2550MHz.
One example where this was observed to be problematic was the Ethernet
clock calculation (which takes MPLL2 as input). When requesting a rate
of 125MHz there is a remainder of 2500000Hz.
The resulting MPLL2 rate before this patch was 127488329Hz.
The resulting MPLL2 rate after this patch is 124999103Hz.
Commit b609338b26f5 ("clk: meson: mpll: use 64bit math in
rate_from_params") already fixed a similar issue in rate_from_params.
Fixes: 007e6e5c5f01d3 ("clk: meson: mpll: add rw operation")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Make the spinlock more specific, so better for lockdep
debugging and ctags/grep.
Suggested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Remove CLK_IGNORE_UNUSED from mmc clocks. This was only needed while the
mmc driver incorrectly used the xtal as source instead of the mmc
clock. Now, the driver takes the correct clock, CCF is aware that the
clock is being used and we can remove this flag.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
According to the datasheet, in Meson-GXBB/GXL series,
The clock gate bit for SARADC is HHI_GCLK_MPEG2 bit[22],
while clock gate bit for SANA is HHI_GCLK_MPEG0 bit[10].
Test passed at gxl-s905x-p212 board.
The following published datasheets are wrong and should be updated
[1] GXBB v1.1.4
[2] GXL v0.3_20170314
Fixes: 738f66d3211d ("clk: gxbb: add AmLogic GXBB clk controller driver")
Tested-by: Xingyu Chen <xingyu.chen@amlogic.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The Amlogic Meson GX SoCs needs these two clocks to power up the
VPU power domain.
These two clocks are similar to the MALI clocks by having a glitch-free
mux and two similar clocks with gate, divider and muxes.
Acked-by: Jerome Brunet <jbrunet@baylibre.com>
[narmstrong: removed the CLK_IGNORE_UNUSED on muxes and dividers]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Add the clkids for the clocks feeding the Video Processing Unit.
Acked-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
The CEC 32K AO Clock is a dual divider with dual counter to provide a more
precise 32768Hz clock for the CEC subsystem from the external xtal.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Switch the aoclk driver to use the new bindings and switch all the
registers access to regmap only.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Input source 0 of the mmc controllers is not directly xtal, as currently
described in DT. Each controller is fed by a composite clock (the usual
mux, divider and gate). The muxes inputs are the xtal (default) and the
fclk_div clocks. These parents, along with the divider, should be able to
provide the necessary rates for mmc and nand operation.
The input muxes should also be able to take mpll2, mpll3 and gp0_pll but
these are precious clocks, needed for other usage. It is better if the
mmc does not use these them. For this reason, mpll2, mpll3 and gp0_pll is
not listed among the possible parents.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
CLK_DIVIDER_ROUND_CLOSEST was incorrectly put in the hw.init flags
while it should have been in the divider flags
Fixes: 3c277c247eab ("clk: meson: gxbb: add cts_mclk_i958")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
CLK_DIVIDER_ROUND_CLOSEST was incorrectly put in the hw.init flags
while it should have been in the divider flags
Fixes: 4087bd4b2170 ("clk: meson: gxbb: add cts_amclk")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
The clock controller also includes some reset lines. This patch
implements a reset controller to assert and de-assert these resets.
The reset controller itself is registered early (through
CLK_OF_DECLARE_DRIVER) because it is needed very early in the boot
process (to start the secondary CPU cores).
According to the public S805 datasheet there are two more reset bits
in the HHI_SYS_CPU_CLK_CNTL0 register, which are not implemented by
this patch (as these seem to be unused in Amlogic's vendor Linux kernel
sources and their u-boot tree):
- bit 15: GEN_DIV_SOFT_RESET
- bit 14: SOFT_RESET
All information was taken from the public S805 Datasheet and Amlogic's
vendor GPL kernel sources. This patch is based on an earlier version
submitted by Carlo Caione.
Suggested-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Add the clkids for the clocks feeding the input0 of the mmc controllers
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Expose all clocks which maybe used as DT bindings
Only clock ids internal the controller remain un-exposed
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Expose all clocks which maybe used as DT bindings
Only clock ids internal the controller remain un-exposed (none on this
particular controller at the moment)
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
gxbb clock driver gracefully handles case where the clkid is defined but
the clock hw pointer is not provided, as long as it is not at the end of
the hw_onecell_data array.
This patch ensure that the last entries are defined as well to handle
this particular case.
Fixes: a70c6e06ed7c ("clk: meson: gxbb: protect against holes in the onecell_data array")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
meson8b clock driver gracefully handles case where the clkid is defined
but the clock hw pointer is not provided, as long as it is not at the end
of the hw_onecell_data array.
This patch ensure that the last entries are defined as well to handle
this particular case.
Fixes: e92f7cca446e ("clk: meson8b: clean up fixed rate clocks")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
mpll0 clock is special compared to the other mplls. It needs another
bit (ssen) to be set to activate the fractional part the mpll divider
Fixes: 007e6e5c5f01 ("clk: meson: mpll: add rw operation")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
* Add new compatible to the meson8 clock controller for meson8b
* Add missing parents to gxbb clk81
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Merge tag 'meson-clk-for-4.13-2' of git://github.com/BayLibre/clk-meson into clk-next
Pull Amlogic clk driver updates from Jerome Brunet:
* Expose more clock gate on meson8 (SAR ADC, RNG, USB, SDIO, ETH)
* Add new compatible to the meson8 clock controller for meson8b
* Add missing parents to gxbb clk81
* tag 'meson-clk-for-4.13-2' of git://github.com/BayLibre/clk-meson:
clk: meson: gxbb: add all clk81 parents
clk: meson: meson8b: add compatibles for Meson8 and Meson8m2
clk: meson8b: export the ethernet gate clock
clk: meson8b: export the USB clocks
clk: meson8b: export the gate clock for the HW random number generator
clk: meson8b: export the SDIO clock
clk: meson8b: export the SAR ADC clocks
Remove the FIXME on clk81 mux and add all the documented parents
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The clock controller on Meson8, Meson8b and Meson8m2 is very similar
based on the code from the Amlogic GPL kernel sources. Add separate
compatibles for each SoC to make sure that we can easily implement
all the small differences for each SoC later on.
In general the Meson8 and Meson8m2 seem to be almost identical as they
even share the same mach-meson8 directory in Amlogic's GPL kernel
sources.
The main clocks on Meson8, Meson8b and Meson8m2 are very similar,
because they are all using the same PLL values, 90% of the clock gates
are the same (the actual diffstat of the mach-meson8/clock.c and
mach-meson8b/clock.c files is around 30 to 40 lines, when excluding
all commented out code).
The difference between the Meson8 and Meson8b clock gates seem to be:
- Meson8 has AIU_PCLK, HDMI_RX, VCLK2_ENCT, VCLK2_ENCL, UART3,
CSI_DIG_CLKIN gates which don't seem to be available on Meson8b
- the gate on Meson8 for bit 7 seems to be named "_1200XXX" instead
of "PERIPHS_TOP" (on Meson8b)
- Meson8b has a SANA gate which doesn't seem to exist on Meson8 (or
on Meson8 the same bit is used by the UART3 gate in Amlogic's GPL
kernel sources)
None of these gates is added for now, since it's unclear whether these
definitions are actually correct (the VCLK2_ENCT gate for example is
defined, but only used in some commented block).
The main difference between all three SoCs seem to be the video (VPU)
clocks. Apart from different supported clock rates (according to vpu.c
in mach-meson8 and mach-meson8b from Amlogic's GPL kernel sources) the
most notable difference is that Meson8m2 has a GP_PLL clock and a mux
(probably the same as on the Meson GX SoCs) to support glitch-free
(clock rate) switching.
None of these VPU clocks are not supported by our mainline meson8b
clock driver yet though.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Export the ethernet gate clock to the dt-bindings.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Export the USB related clocks (for the USB controller and the USB2 PHYs)
so they can be used in the dt-bindings.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
This exports the clock so it can be used in the dt-bindings.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Export the SDIO clock so it can be used in the dt-bindings.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Export the clocks for the SAR ADC so they can be used in the
dt-bindings.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
These can be marked as const * const.
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* Expose more i2s and spdif output clocks
* Expose EE uart and SPICC gate clocks
* Remove cpu_clk from to gxbb
* Mark clk81 as critical on gxbb
* Add CEC EE clocks
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Merge tag 'meson-clk-for-4.13' of git://github.com/BayLibre/clk-meson into clk-next
Pull Amlogic clock driver updates from Jerome Brunet:
* Expose more i2s and spdif output clocks
* Expose EE uart and SPICC gate clocks
* Remove cpu_clk from to gxbb
* Mark clk81 as critical on gxbb
* Add CEC EE clocks
* tag 'meson-clk-for-4.13' of git://github.com/BayLibre/clk-meson:
clk: meson-gxbb: Add EE 32K Clock for CEC
clk: gxbb: remove CLK_IGNORE_UNUSED from clk81
clk: meson: meson8b: mark clk81 as critical
clk: meson: gxbb: remove the "cpu_clk" from the GXBB and GXL driver
clk: meson-gxbb: un-export the CPU clock
clk: meson-gxbb: expose UART clocks
clk: meson-gxbb: expose SPICC gate
clk: meson-gxbb: expose spdif master clock
clk: meson-gxbb: expose i2s master clock
clk: meson-gxbb: expose spdif clock gates
On Amlogic GX SoCs, there is two CEC controllers :
- An Amlogic CEC custom in the AO domain
- The Synopsys HDMI-TX Controller in the EE domain
Each of these controllers needs a 32.768KHz clock, but there is two paths :
- In the EE domain, the "32k_clk" this patchs is adding
- In the AO domain, with a more complex dual divider more precise setup
The AO 32K clock support will be pushed later in the corresponding
gxbb-aoclk driver when the AE CEC driver is ready.
The EE 32k_clk must be pushed earlier since mainline support for CEC in the
Synopsys HDMI-TX controller is nearby.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
[Rebased patch on top of last changes]
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
clk81 already has CLK_IS_CRITICAL so CLK_IGNORE_UNUSED is not
necessary
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Disabling clk81 results in an immediate freeze of the whole system. This
can happen "accidentally" when the last child-clock of clk81 is disabled
(in this case the common clock framework also disables clk81, even if it
was only enabled indirectly before).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
It seems that the "cpu_clk" was carried over from the meson8b clock
controller driver. On Meson GX (GXBB/GXL/GXM) the registers which are
used by the cpu_clk have a different purpose (in other words: they don't
control the CPU clock anymore). HHI_SYS_CPU_CLK_CNTL1 bits 31:24 are
reserved according to the public S905 datasheet, while bit 23 is the
"A53_trace_clk_DIS" gate (which according to the datasheet should only
be used in case a silicon bug is discovered) and bits 22:20 are a
divider (A53_trace_clk). The meson clk-cpu code however expects that
bits 28:20 are reserved for a divider (according to the public S805
datasheet this "SCALE_DIV: This value represents an N+1 divider of the
input clock.").
The CPU clock on Meson GX SoCs is provided by the SCPI DVFS clock
driver instead. Two examples from a Meson GXL S905X SoC:
- vcpu (SCPI DVFS clock 0) rate: 1000000000 / cpu_clk rate: 708000000
- vcpu (SCPI DVFS clock 0) rate: 1512000000 / cpu_clk rate: 708000000
Unfortunately the CLKID_CPUCLK was already exported (but is currently
not used) to DT. Due to the removal of this clock definition there is
now a hole in the clk_hw_onecell_data (which is not a problem because
this case is already handled in gxbb_clkc_probe).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The CPU clock defined in the Meson GX clock driver is actually a
left-over from the Meson8b clock controller. Un-export the clock so we
can remove it from the driver.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Expose the clock ids of the three none AO uarts to the dt-bindings
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Helmut Klein <hgkr.klein@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
[tidy the commit message to match similar change]
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Expose the SPICC gate clock to enable the SPICC controller.
Acked-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
[tidy commit message to match similar changes]
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
