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'struct meson_secure_pwrc_domain_desc' is not modified in this driver.
Constifying this structure moves some data to a read-only section, so
increase overall security.
On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
4909 4072 0 8981 2315 drivers/pmdomain/amlogic/meson-secure-pwrc.o
After:
=====
text data bss dec hex filename
8605 392 0 8997 2325 drivers/pmdomain/amlogic/meson-secure-pwrc.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/871d6b708de8bb42e1fabd8a601dc9a9a217cf00.1719863475.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Add support for the A5 power controller, whose registers are
in the secure domain and should be accessed via SMC.
Signed-off-by: Hongyu Chen <hongyu.chen1@amlogic.com>
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240627-a5_secpower-v1-2-1f47dde1270c@amlogic.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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On x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pmdomain/amlogic/meson-gx-pwrc-vpu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pmdomain/amlogic/meson-ee-pwrc.o
Add the missing invocation of the MODULE_DESCRIPTION() macro to all
files which have a MODULE_LICENSE().
This includes meson-secure-pwrc.c which, although it did not produce a
warning with the x86 allmodconfig configuration, may cause this
warning with other configurations where CONFIG_MESON_SM is enabled.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240610-md-drivers-pmdomain-amlogic-v1-1-b49ddb1a8bdf@quicinc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Add support for A4 power controller. A4 power control
registers are in secure domain, and should be accessed by SMC.
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Link: https://lore.kernel.org/r/20240529-a4_secpowerdomain-v2-2-47502fc0eaf3@amlogic.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Add support for T7 power controller. T7 power control
registers are in secure domain, and should be accessed by SMC.
Signed-off-by: xianwei.zhao <xianwei.zhao@amlogic.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230911025223.3433776-6-xianwei.zhao@amlogic.com
[Ulf: Re-based to fit the pmdomain subsystem]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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If initial power domain with 'AWAY_ON' property state is off,
turn on the power.
Signed-off-by: xianwei.zhao <xianwei.zhao@amlogic.com>
Link: https://lore.kernel.org/r/20230911025223.3433776-4-xianwei.zhao@amlogic.com
[Ulf: Re-based to fit the pmdomain subsystem]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Some power domains depends on other domains, Such as Amlogic T7 SoC.
Add parent node to support this case.
Signed-off-by: xianwei.zhao <xianwei.zhao@amlogic.com>
Link: https://lore.kernel.org/r/20230911025223.3433776-3-xianwei.zhao@amlogic.com
[Ulf: Re-based to fit the pmdomain subsystem]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Some power domains for C3 can be using runtime PM,
remove ALWAYS_ON property. And add some power domains
description when ALWAYS_ON property.
Signed-off-by: xianwei.zhao <xianwei.zhao@amlogic.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230911025223.3433776-2-xianwei.zhao@amlogic.com
[Ulf: Re-based to fit the pmdomain subsystem]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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It has been pointed out that naming a subsystem "genpd" isn't very
self-explanatory and the acronym itself that means Generic PM Domain, is
known only by a limited group of people.
In a way to improve the situation, let's rename the subsystem to pmdomain,
which ideally should indicate that this is about so called Power Domains or
"PM domains" as we often also use within the Linux Kernel terminology.
Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230912221127.487327-1-ulf.hansson@linaro.org
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