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4f16f7ff3b
linux/drivers/clk
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Kaihua Zhong 4f16f7ff3b clk: hisilicon: Add support for Hi3660 stub clocks 
Hi3660 has four stub clocks, which are big and LITTLE cluster clocks,
GPU clock and DDR clock.  These clocks ask MCU for frequency scaling
by sending message through mailbox.

This commit adds support for stub clocks, it requests the dedicated
mailbox channel at initialization; then later uses this channel to send
message to MCU to execute frequency scaling. The four stub clocks share
the same mailbox channel, but every stub clock has its own command id so
MCU can distinguish the requirement coming for which clock.

A shared memory is used to present effective frequency value, so the
clock driver uses I/O mapping for the memory and reads back rate value.

Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Kai Zhao <zhaokai1@hisilicon.com>
Signed-off-by: Tao Wang <kevin.wangtao@hisilicon.com>
Signed-off-by: Ruyi Wang <wangruyi@huawei.com>
Signed-off-by: Kaihua Zhong <zhongkaihua@huawei.com>
[sboyd: Fix possible out of bounds access in hi3660_stub_clk_hw_get(),
        use devm_of_clk_add_hw_provider(), devm_ioremap() returns
	NULL not error pointers]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-12-06 23:01:46 -08:00
..
at91 We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
axis clk: axis: Use new macro CLK_OF_DECLARE_DRIVER 2016-08-12 18:00:37 -07:00
axs10x clk: axs10x: introduce AXS10X pll driver 2017-07-17 11:50:59 -07:00
bcm We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
berlin clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
h8300 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hisilicon clk: hisilicon: Add support for Hi3660 stub clocks 2017-12-06 23:01:46 -08:00
imgtec Update MIPS email addresses 2017-11-03 09:02:30 -07:00
imx We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
ingenic Update MIPS email addresses 2017-11-03 09:02:30 -07:00
keystone clk: keystone: sci-clk: Fix sci_clk_get 2017-08-02 18:37:26 -07:00
loongson1 CLK: Add Loongson1C clock support 2016-09-23 14:49:21 -07:00
mediatek We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
meson clk: meson: gxbb: Add VPU and VAPB clocks data 2017-10-20 10:34:49 +02:00
microchip clk: microchip: Initialize SOSC clock rate for PIC32MZDA. 2016-08-24 16:05:24 -07:00
mmp We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
mvebu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mxs clk: mxs: make clk_ops const 2017-11-01 23:25:43 -07:00
nxp clk: nxp: clk-lpc32xx: rename clk_gate_is_enabled() 2017-08-31 18:35:44 -07:00
pistachio
pxa clk: pxa: fix building on older compilers 2017-11-14 15:55:53 -08:00
qcom We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
renesas We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
rockchip We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
samsung We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
sirf We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
socfpga License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spear We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
st License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sunxi We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
sunxi-ng We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
tegra We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
ti We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
uniphier We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
ux500 We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
versatile We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
x86 clk: x86: Do not gate clocks enabled by the firmware 2017-07-18 16:23:13 -07:00
zte clk: zte: constify clk_div_table 2017-08-30 22:30:30 -07:00
zynq clk: zynq: Remove CLK_IS_ROOT 2016-03-02 17:48:26 -08:00
clk-asm9260.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-axi-clkgen.c clk: axi-clkgen: Migrate to clk_hw based OF and registration APIs 2016-08-24 16:10:31 -07:00
clk-axm5516.c clk: axm5516: Migrate to clk_hw based OF and registration APIs 2016-08-24 16:11:07 -07:00
clk-bulk.c clk: Export clk_bulk_prepare() 2017-09-29 14:17:17 -07:00
clk-cdce706.c clk: cdce: Migrate to clk_hw based OF and registration APIs 2016-08-24 16:12:38 -07:00
clk-cdce925.c clk: cdce925: remove redundant check for non-null parent_name 2017-11-13 17:44:15 -08:00
clk-clps711x.c clk: clps711x: Migrate to clk_hw based OF and registration APIs 2016-08-24 17:19:26 -07:00
clk-composite.c Merge branch 'clk-hw-register' (early part) into clk-next 2016-04-21 14:47:18 -07:00
clk-conf.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-cs2000-cp.c clk: cs2000: Add cs2000_set_saved_rate 2017-08-31 11:32:32 -07:00
clk-devres.c clk: add managed version of clk_bulk_get 2017-06-02 15:37:49 -07:00
clk-divider.c clk: Don't write error code into divider register 2017-08-31 18:43:38 -07:00
clk-efm32gg.c clk: efm32gg: Pass correct type to hw provider registration 2016-11-16 11:08:55 -08:00
clk-fixed-factor.c clk: fixed-factor: Remove export symbol on setup function 2016-08-15 15:08:03 -07:00
clk-fixed-rate.c clk: fixed-rate: Remove export symbol on setup function 2016-08-15 15:08:06 -07:00
clk-fractional-divider.c clk: fractional-divider: allow overriding of approximation 2017-08-08 17:39:48 +02:00
clk-gate.c clk: gate: expose clk_gate_ops::is_enabled 2017-08-31 18:35:45 -07:00
clk-gemini.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
clk-gpio.c clk: clk-gpio: Request GPIO descriptor as LOW 2017-11-02 01:20:40 -07:00
clk-hi655x.c clk: hi6220: Add the hi655x's pmic clock 2017-04-21 19:18:53 -07:00
clk-highbank.c clk: highbank: Migrate to clk_hw based registration and OF APIs 2016-06-30 12:25:28 -07:00
clk-hsdk-pll.c ARC: clk: fix spelling mistake: "configurarion" -> "configuration" 2017-11-13 17:44:26 -08:00
clk-max77686.c clk: max77686: fix number of clocks setup for clk_hw based registration 2016-10-17 15:31:59 -07:00
clk-moxart.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-multiplier.c clk: multiplier: Prevent the multiplier from under / over flowing 2016-06-20 13:00:00 -07:00
clk-mux.c clk: clk-mux: Improve a size determination in clk_hw_register_mux_table() 2017-11-13 17:28:39 -08:00
clk-nomadik.c clk: nomadik: Delete error messages for a failed memory allocation in two functions 2017-04-21 19:47:14 -07:00
clk-nspire.c clk: nspire: Migrate to clk_hw based OF and registration APIs 2016-08-24 17:23:21 -07:00
clk-oxnas.c clk: oxnas: Add OX820 Gate clocks 2016-10-23 10:18:45 -07:00
clk-palmas.c clk: palmas: undo preparation of a clock source. 2017-06-02 10:51:34 -07:00
clk-pwm.c clk: pwm: Migrate to clk_hw based OF and registration APIs 2016-08-24 17:23:27 -07:00
clk-qoriq.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-rk808.c clk: rk808: Pass the right pointer as the get_hw context 2016-09-09 11:07:07 -07:00
clk-s2mps11.c clk: s2mps11: Migrate to clk_hw based OF and registration APIs 2016-06-30 12:29:14 -07:00
clk-scpi.c clk: scpi: error when clock fails to register 2017-06-29 18:47:35 -07:00
clk-si514.c clk: si514: Migrate to clk_hw based OF and registration APIs 2016-08-24 17:29:59 -07:00
clk-si570.c clk: si570: Migrate to clk_hw based OF and registration APIs 2016-08-24 17:30:01 -07:00
clk-si5351.c clk: si5351: fix PLL reset 2017-09-01 16:00:54 -07:00
clk-si5351.h
clk-stm32f4.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-stm32h7.c clk: stm32h7: fix test of clock config 2017-11-14 17:06:49 -08:00
clk-tango4.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
clk-twl6040.c clk: make clk_init_data const 2017-11-01 23:25:51 -07:00
clk-u300.c clk: clk-u300: Fix a typo in two comment lines 2017-11-13 17:39:43 -08:00
clk-versaclock5.c clk: vc5: Add support for IDT VersaClock 5P49V5925 2017-07-17 11:51:00 -07:00
clk-vt8500.c clk: vt8500: Migrate to clk_hw based registration APIs 2016-08-24 17:35:48 -07:00
clk-wm831x.c clk: make clk_init_data const 2017-11-01 23:25:51 -07:00
clk-xgene.c clk: clk-xgene: Adjust six checks for null pointers 2017-11-13 17:40:03 -08:00
clk.c Merge branch 'clk-devm-provider' into clk-next 2017-11-14 10:07:39 -08:00
clk.h
clkdev.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
Kconfig clk: Kconfig: Name RK805 in Kconfig for COMMON_CLK_RK808 2017-08-31 16:20:12 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00