From: Neil Armstrong <narmstrong@baylibre.com>
To: sboyd@kernel.org, jbrunet@baylibre.com
Cc: Neil Armstrong <narmstrong@baylibre.com>,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/4] clk: meson: g12a: add support for DVFS
Date: Wed, 31 Jul 2019 10:40:15 +0200 [thread overview]
Message-ID: <20190731084019.8451-1-narmstrong@baylibre.com> (raw)
The G12A/G12B Socs embeds a specific clock tree for each CPU cluster :
cpu_clk / cpub_clk
| \- cpu_clk_dyn
| | \- cpu_clk_premux0
| | |- cpu_clk_postmux0
| | | |- cpu_clk_dyn0_div
| | | \- xtal/fclk_div2/fclk_div3
| | \- xtal/fclk_div2/fclk_div3
| \- cpu_clk_premux1
| |- cpu_clk_postmux1
| | |- cpu_clk_dyn1_div
| | \- xtal/fclk_div2/fclk_div3
| \- xtal/fclk_div2/fclk_div3
\ sys_pll / sys1_pll
This patchset adds notifiers on cpu_clk / cpub_clk, cpu_clk_dyn,
cpu_clk_premux0 and sys_pll / sys1_pll to permit change frequency of
the CPU clock in a safe way as recommended by the vendor Documentation
and reference code.
This patchset :
- introduces needed core and meson clk changes
- adds the clock notifiers
Dependencies:
- None
This patchset is split from the v3 RFC/RFC patchset at [3]
Changes from v1 at [4]:
- Removed export of regmap_div ops functions
- Added standalone cpu dynamic divider driver
- Uses cpu dynamic divider driver in g12a clkc driver
- Added missing signed-off tags
- Fixed missing removal of CLKID_CPUB_CLK from internal g12a.h
Changes from RFT/RFC v3 at [3]:
- Rebased on clk-meson v5.4/drivers tree with Alexandre's patches
- Removed the eeclk setup() callback, moved to a toplevel g12a-data struct
Changes since RFT/RFC v2 at [2]:
- Rebased on clk-meson v5.3/drivers trees
- added Kevin's review tags
Changes since RFT/RFC v1 at [1]:
- Added EXPORT_SYMBOL_GPL() to clk_hw_set_parent
- Added missing static to g12b_cpub_clk_mux0_div_ops and g12a_cpu_clk_mux_nb
- Simplified g12a_cpu_clk_mux_notifier_cb() without switch/case
- Fixed typo in "this the current path" in g12a.c
- Fixed various checkpatch errors
[1] https://patchwork.kernel.org/cover/11006929/
[2] https://patchwork.kernel.org/cover/11017273/
[3] https://patchwork.kernel.org/cover/11025309/
[4] https://patchwork.kernel.org/cover/11063803/
Neil Armstrong (4):
clk: core: introduce clk_hw_set_parent()
clk: meson: add g12a cpu dynamic divider driver
clk: meson: g12a: add notifiers to handle cpu clock change
clk: meson: g12a: expose CPUB clock ID for G12B
drivers/clk/clk.c | 6 +
drivers/clk/meson/Kconfig | 5 +
drivers/clk/meson/Makefile | 1 +
drivers/clk/meson/clk-cpu-dyndiv.c | 73 ++++
drivers/clk/meson/clk-cpu-dyndiv.h | 20 +
drivers/clk/meson/g12a.c | 535 +++++++++++++++++++++++---
drivers/clk/meson/g12a.h | 1 -
include/dt-bindings/clock/g12a-clkc.h | 1 +
include/linux/clk-provider.h | 1 +
9 files changed, 588 insertions(+), 55 deletions(-)
create mode 100644 drivers/clk/meson/clk-cpu-dyndiv.c
create mode 100644 drivers/clk/meson/clk-cpu-dyndiv.h
--
2.22.0
next reply other threads:[~2019-07-31 8:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 8:40 Neil Armstrong [this message]
2019-07-31 8:40 ` [PATCH v2 1/4] clk: core: introduce clk_hw_set_parent() Neil Armstrong
2019-08-06 8:28 ` Jerome Brunet
2019-08-08 4:47 ` Stephen Boyd
2019-07-31 8:40 ` [PATCH v2 2/4] clk: meson: add g12a cpu dynamic divider driver Neil Armstrong
2019-08-03 18:34 ` Martin Blumenstingl
2019-07-31 8:40 ` [PATCH v2 3/4] clk: meson: g12a: add notifiers to handle cpu clock change Neil Armstrong
2019-07-31 8:40 ` [PATCH v2 4/4] clk: meson: g12a: expose CPUB clock ID for G12B Neil Armstrong
2019-08-06 8:38 ` [PATCH v2 0/4] clk: meson: g12a: add support for DVFS Jerome Brunet
2019-08-08 21:18 ` Kevin Hilman
2019-08-09 13:02 ` Jerome Brunet
2019-08-09 17:55 ` Kevin Hilman
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