alistair23-linux/drivers/clk/meson
Jerome Brunet f9b3eeebef clk: meson: mpll: properly handle spread spectrum
The bit 'SSEN' available on some MPLL DSS outputs is not related to the
fractional part of the divider but to the function called
'Spread Spectrum'.

This function might be used to solve EM issues by adding a jitter on
clock signal. This widens the signal spectrum and weakens the peaks in it.

While spread spectrum might be useful for some application, it is
problematic for others, such as audio.

This patch introduce a new flag to the MPLL driver to enable (or not) the
spread spectrum function.

Fixes: 1f737ffa13 ("clk: meson: mpll: fix mpll0 fractional part ignored")
Tested-by: Martin Blumenstingl<martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
2019-05-20 12:17:57 +02:00
..
axg-aoclk.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
axg-aoclk.h clk: meson: axg-ao: add 32k generation subtree 2019-01-07 15:21:43 +01:00
axg-audio.c clk: meson: axg-audio: add g12a support 2019-04-08 09:59:33 +02:00
axg-audio.h clk: meson: axg-audio: add g12a support 2019-04-08 09:59:33 +02:00
axg.c clk: meson: factorise meson64 peripheral clock controller drivers 2019-02-04 09:52:11 +01:00
axg.h clk: meson: clk-pll: remove od parameters 2018-09-26 12:01:57 +02:00
clk-dualdiv.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-dualdiv.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-input.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-input.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-mpll.c clk: meson: mpll: properly handle spread spectrum 2019-05-20 12:17:57 +02:00
clk-mpll.h clk: meson: mpll: properly handle spread spectrum 2019-05-20 12:17:57 +02:00
clk-phase.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-phase.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-pll.c Merge branches 'clk-doc', 'clk-more-critical', 'clk-meson' and 'clk-basic-be' into clk-next 2019-05-07 11:44:42 -07:00
clk-pll.h clk: meson-pll: add reduced specific clk_ops for G12A PCIe PLL 2019-04-01 10:45:11 +02:00
clk-regmap.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
clk-regmap.h clk: meson: g12a: add peripheral clock controller 2019-02-04 09:52:11 +01:00
g12a-aoclk.c clk: meson: Add G12A AO Clock + Reset Controller 2019-02-13 09:49:32 +01:00
g12a-aoclk.h dt-bindings: clock: g12a-aoclk: expose CLKID_AO_CTS_OSCIN 2019-04-01 10:45:11 +02:00
g12a.c clk: meson: fix MPLL 50M binding id typo 2019-05-20 12:05:46 +02:00
g12a.h clk: meson: fix MPLL 50M binding id typo 2019-05-20 12:05:46 +02:00
gxbb-aoclk.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
gxbb-aoclk.h clk: meson: gxbb-ao: replace cec-32k with the dual divider 2019-01-07 15:21:22 +01:00
gxbb.c clk: meson-gxbb: round the vdec dividers to closest 2019-03-19 17:36:37 +01:00
gxbb.h dt-bindings: clk: meson-gxbb: Add Video clock bindings 2018-11-23 15:11:56 +01:00
Kconfig clk: meson: Add G12A AO Clock + Reset Controller 2019-02-13 09:49:32 +01:00
Makefile clk: meson: Add G12A AO Clock + Reset Controller 2019-02-13 09:49:32 +01:00
meson-aoclk.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
meson-aoclk.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
meson-eeclk.c clk: meson: factorise meson64 peripheral clock controller drivers 2019-02-04 09:52:11 +01:00
meson-eeclk.h clk: meson: factorise meson64 peripheral clock controller drivers 2019-02-04 09:52:11 +01:00
meson8b.c clk: meson: meson8b: fix a typo in the VPU parent names array variable 2019-05-20 12:11:08 +02:00
meson8b.h clk: meson: meson8b: add the video decoder clock trees 2019-04-01 13:34:29 +02:00
parm.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
sclk-div.c clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
sclk-div.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00
vid-pll-div.c clk: meson: vid-pll-div: remove warning and return 0 on invalid config 2019-03-29 09:41:30 +01:00
vid-pll-div.h clk: meson: rework and clean drivers dependencies 2019-02-02 17:43:32 +01:00