From: Sascha Hauer <s.hauer@pengutronix.de>
To: linux-kernel@vger.kernel.org
Cc: Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
kernel@pengutronix.de, alkml@pengutronix.de
Subject: [PATCH v2] regulator: Propagate voltage changes to supply regulators
Date: Tue, 13 Oct 2015 12:45:23 +0200 [thread overview]
Message-ID: <1444733131-26995-1-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To:
Until now changing the voltage of a regulator only ever effected the
regulator itself, but never its supplies. It's a common pattern though
to put LDO regulators behind switching regulators. The switching
regulators efficiently drop the input voltage but have a high ripple on
their output. The output is then cleaned up by the LDOs. For higher
energy efficiency the voltage drop at the LDOs should be minimized. This
series adds support for such a scenario. Another case voltage
propagation is useful is simple switches which are abstracted as
regulators. These can now offer voltage settings to their consumers
which are transparently passed to the switches supply.
Please review, any input welcome.
Changes since RFC (v1):
- split into more patches
- Only do voltage propagation when we have a supply and either a minimum
dropout voltage is specified or the regulator is a switch (lacks a
get_voltage operation)
Sascha
next reply other threads:[~2015-10-13 10:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-13 10:45 Sascha Hauer [this message]
2015-10-13 10:45 ` [PATCH 1/8] regulator: core: create unlocked version of regulator_list_voltage Sascha Hauer
2015-10-16 15:26 ` Mark Brown
2015-10-13 10:45 ` [PATCH 2/8] regulator: core: create unlocked version of regulator_set_voltage Sascha Hauer
2015-10-16 17:04 ` Applied "regulator: core: create unlocked version of regulator_set_voltage" to the regulator tree Mark Brown
2015-10-13 10:45 ` [PATCH 3/8] regulator: introduce min_dropout_uv Sascha Hauer
2015-10-16 16:11 ` Mark Brown
2015-10-16 16:41 ` Applied "regulator: introduce min_dropout_uv" to the regulator tree Mark Brown
2015-10-16 16:57 ` Mark Brown
2015-10-13 10:45 ` [PATCH 4/8] regulator: core: introduce function to lock regulators and its supplies Sascha Hauer
2015-10-13 10:45 ` [PATCH 5/8] regulator: introduce regulator_get_voltage_floor Sascha Hauer
2015-10-16 16:50 ` Mark Brown
2015-10-20 12:26 ` Sascha Hauer
2015-10-13 10:45 ` [PATCH 6/8] regulator: core: Propagate voltage changes to supply regulators Sascha Hauer
2015-10-16 16:55 ` Mark Brown
2015-10-13 10:45 ` [PATCH 7/8] regulator: i.MX anatop: Allow supply regulator Sascha Hauer
2015-10-13 10:45 ` [PATCH 8/8] ARM: i.MX6 Phytec PFLA02: Add supplies for the SoC internal regulators Sascha Hauer
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