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Date: Tue, 7 Jan 2020 08:50:34 -0800
From: Sowjanya Komatineni <skomatineni@...dia.com>
To: Thierry Reding <thierry.reding@...il.com>
CC: <jonathanh@...dia.com>, <broonie@...nel.org>,
<lgirdwood@...il.com>, <perex@...ex.cz>, <tiwai@...e.com>,
<digetx@...il.com>, <mperttunen@...dia.com>,
<gregkh@...uxfoundation.org>, <sboyd@...nel.org>,
<robh+dt@...nel.org>, <mark.rutland@....com>,
<pdeschrijver@...dia.com>, <pgaikwad@...dia.com>,
<spujar@...dia.com>, <josephl@...dia.com>,
<daniel.lezcano@...aro.org>, <mmaddireddy@...dia.com>,
<markz@...dia.com>, <devicetree@...r.kernel.org>,
<linux-clk@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 00/19] Move PMC clocks into Tegra PMC driver
On 1/7/20 4:21 AM, Thierry Reding wrote:
> On Mon, Jan 06, 2020 at 08:13:59PM -0800, Sowjanya Komatineni wrote:
>> This patch series moves Tegra PMC clocks from clock driver to pmc driver
>> along with the device trees changes and audio driver which uses one of
>> the pmc clock for audio mclk.
>>
>> Tegra PMC has clk_out_1, clk_out_2, clk_out_3 and blink controls which
>> are currently registered by Tegra clock driver using clk_regiser_mux and
>> clk_register_gate which performs direct Tegra PMC register access.
>>
>> When Tegra PMC is in secure mode, any access from non-secure world will
>> not go through.
>>
>> This patch series adds these Tegra PMC clocks and blink controls to Tegra
>> PMC driver with PMC as clock provider and removes them from Tegra clock
>> driver.
>>
>> PMC clock clk_out_1 is dedicated for audio mclk from Tegra30 thru Tegra210
>> and clock driver does inital parent configuration for it and enables them.
>> But this clock should be taken care by audio driver as there is no need
>> to have this clock pre enabled.
>>
>> So, this series also includes patch that updates ASoC driver to take
>> care of parent configuration for mclk if device tree don't specify
>> initial parent configuration using assigned-clock-parents and controls
>> audio mclk enable/disable during ASoC machine startup and shutdown.
>>
>> DTs are also updated to use clk_out_1 as audio mclk rather than extern1.
>>
>> This series also includes a patch for mclk fallback to extern1 when
>> retrieving mclk fails to have this backward compatible of new DT with
>> old kernels.
> Hi Sowjanya,
>
> this looks like it's almost ready to merge. Can you highlight if there
> are any build-time or runtime dependencies between the patches? The
> audio driver changes seem to be mostly isolated from the rest by the
> fallback implementation for legacy device trees.
>
> Is there anything that I need to keep in mind when applying these? And
> would it be fine for Mark to pick up the ASoC patches separately from
> the rest?
>
> Thierry
Yes, ASoC patches can be picked separately.
dependencies are b/w clock and pmc driver patches.
>
>> [v6]: Changes between v5 and v6 are
>> - v5 feedback
>> - Added ASoC machine startup and shutdown callbacks to control audio
>> mclk enable/disable and removed default mclk enable from clock driver.
>> - Updated tegra_asoc_utils_set_rate to disable mclk only during PLLA
>> rate change and removed disabling PLLA as its already taken care by
>> pll clock driver.
>> - Removed tegra_asoc_utils_set_rate call from utils_init as set_rate
>> is set during machine hw_params and during utils_init mclk is
>> already in disabled state and this causes warning during mclk disable
>> in utils_set_rate.
>>
>> [v5]: Changes between v4 and v5 are
>> - v4 feedback
>> - updated dt-binding pmc YAML schema with more description on power
>> gate nodes and pad configuration state nodes.
>> - update tegra_asoc_utils_set_rate to disable audio mclk only if
>> its in enable state.
>>
>> [v4]: Changes between v3 and v4 are
>> - v3 Feedback
>> - Updated clocks clk_m_div2 and clk_m_div4 as osc_div2 and osc_div4.
>> Tegra don't have clk_m_div2, clk_m_div4 and they should actually
>> be osc_div2 and osc_div4 clocks from osc pads.
>> - Fixed PMC clock parents to use osc, osc_div2, osc_div4.
>> - Register each PMC clock as single clock rather than separate
>> mux and gate clocks.
>> - Update ASoC utils to use resource managed APIs rather than
>> using clk_get and clk_put.
>> - Updated device tree and ASoC driver to use clk_out_1 instead of
>> clk_out_1_mux as PMC clocks are registered as single clock.
>> - Update clock driver init_table to not enable audio related clocks
>> as ASoC utils will do audio clock enables.
>>
>> [v3]: Changes between v2 and v3 are
>> - Removes set parent of clk_out_1_mux to extern1 and enabling
>> extern1 from the clock driver.
>> - Doesn't enable clk_out_1 and blink by default in pmc driver
>> - Updates ASoC driver to take care of audio mclk parent
>> configuration incase if device tree don't specify assigned
>> clock parent properties and enables mclk using both clk_out_1
>> and extern1.
>> - updates all device trees using extern1 as mclk in sound node
>> to use clk_out_1 from pmc.
>> - patch for YAML format pmc dt-binding
>> - Includes v2 feedback
>>
>> [v2]: Changes between v1 and v2 are
>> - v2 includes patches for adding clk_out_1, clk_out_2, clk_out_3,
>> blink controls to Tegra PMC driver and removing clk-tegra-pmc.
>> - feedback related to pmc clocks in Tegra PMC driver from v1
>> - Removed patches for WB0 PLLM overrides and PLLE IDDQ PMC programming
>> by the clock driver using helper functions from Tegra PMC.
>>
>> Note:
>> To use helper functions from PMC driver, PMC early init need to
>> happen prior to using helper functions and these helper functions are
>> for PLLM Override and PLLE IDDQ programming in PMC during PLLM/PLLE
>> clock registration which happen in clock_init prior to Tegra PMC
>> probe.
>> Moving PLLM/PLLE clocks registration to happen after Tegra PMC
>> impacts other clocks EMC, MC and corresponding tegra_emc_init and
>> tegra_mc_init.
>> This implementation of configuring PMC registers thru helper
>> functions in clock driver needs proper changes across PMC, Clock,
>> EMC and MC inits to have it work across all Tegra platforms.
>>
>> Currently PLLM Override is not enabled in the bootloader so proper
>> patches for this fix will be taken care separately.
>>
>> [v1]: v1 includes patches for below fixes.
>> - adding clk_out_1, clk_out_2, clk_out_3, blink controls to Tegra PMC
>> driver and removing clk-tegra-pmc.
>> - updated clock provider from tegra_car to pmc in the device tree
>> tegra210-smaug.dts that uses clk_out_2.
>> - Added helper functions in PMC driver for WB0 PLLM overrides and PLLE
>> IDDQ programming to use by clock driver and updated clock driver to
>> use these helper functions and removed direct PMC access from clock
>> driver and all pmc base address references in clock driver.
>>
>>
>>
>>
>> Sowjanya Komatineni (19):
>> dt-bindings: clock: tegra: Change CLK_M_DIV to OSC_DIV clocks
>> clk: tegra: Change CLK_M_DIV clocks to OSC_DIV clocks
>> clk: tegra: Fix Tegra PMC clock out parents
>> dt-bindings: tegra: Convert Tegra PMC bindings to YAML
>> dt-bindings: soc: tegra-pmc: Add Tegra PMC clock bindings
>> soc: tegra: Add Tegra PMC clocks registration into PMC driver
>> dt-bindings: soc: tegra-pmc: Add id for Tegra PMC 32KHz blink clock
>> soc: tegra: Add support for 32KHz blink clock
>> clk: tegra: Remove tegra_pmc_clk_init along with clk ids
>> dt-bindings: clock: tegra: Remove pmc clock ids from clock dt-bindings
>> ASoC: tegra: Use device managed resource APIs to get the clock
>> ASoC: tegra: Add audio mclk configuration
>> ASoC: tegra: Add fallback implementation for audio mclk
>> clk: tegra: Remove audio related clock enables from init_table
>> ARM: dts: tegra: Add clock-cells property to pmc
>> arm64: tegra: Add clock-cells property to Tegra PMC node
>> ARM: tegra: Update sound node clocks in device tree
>> arm64: tegra: smaug: Change clk_out_2 provider to pmc
>> ASoC: nau8825: change Tegra clk_out_2 provider from tegra_car to pmc
>>
>> .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 300 -----------------
>> .../bindings/arm/tegra/nvidia,tegra20-pmc.yaml | 354 +++++++++++++++++++++
>> .../devicetree/bindings/sound/nau8825.txt | 2 +-
>> arch/arm/boot/dts/tegra114-dalmore.dts | 8 +-
>> arch/arm/boot/dts/tegra114.dtsi | 4 +-
>> arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi | 8 +-
>> arch/arm/boot/dts/tegra124-apalis.dtsi | 8 +-
>> arch/arm/boot/dts/tegra124-jetson-tk1.dts | 8 +-
>> arch/arm/boot/dts/tegra124-nyan.dtsi | 8 +-
>> arch/arm/boot/dts/tegra124-venice2.dts | 8 +-
>> arch/arm/boot/dts/tegra124.dtsi | 4 +-
>> arch/arm/boot/dts/tegra20.dtsi | 4 +-
>> arch/arm/boot/dts/tegra30-apalis-v1.1.dtsi | 8 +-
>> arch/arm/boot/dts/tegra30-apalis.dtsi | 8 +-
>> arch/arm/boot/dts/tegra30-beaver.dts | 8 +-
>> arch/arm/boot/dts/tegra30-cardhu.dtsi | 8 +-
>> arch/arm/boot/dts/tegra30-colibri.dtsi | 8 +-
>> arch/arm/boot/dts/tegra30.dtsi | 4 +-
>> arch/arm64/boot/dts/nvidia/tegra132.dtsi | 4 +-
>> arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 2 +-
>> arch/arm64/boot/dts/nvidia/tegra210.dtsi | 6 +-
>> drivers/clk/tegra/Makefile | 1 -
>> drivers/clk/tegra/clk-id.h | 11 +-
>> drivers/clk/tegra/clk-tegra-fixed.c | 32 +-
>> drivers/clk/tegra/clk-tegra-pmc.c | 122 -------
>> drivers/clk/tegra/clk-tegra114.c | 41 +--
>> drivers/clk/tegra/clk-tegra124.c | 46 +--
>> drivers/clk/tegra/clk-tegra20.c | 9 +-
>> drivers/clk/tegra/clk-tegra210.c | 30 +-
>> drivers/clk/tegra/clk-tegra30.c | 31 +-
>> drivers/clk/tegra/clk.h | 1 -
>> drivers/soc/tegra/pmc.c | 352 ++++++++++++++++++++
>> include/dt-bindings/clock/tegra114-car.h | 18 +-
>> include/dt-bindings/clock/tegra124-car-common.h | 18 +-
>> include/dt-bindings/clock/tegra20-car.h | 2 +-
>> include/dt-bindings/clock/tegra210-car.h | 18 +-
>> include/dt-bindings/clock/tegra30-car.h | 18 +-
>> include/dt-bindings/soc/tegra-pmc.h | 16 +
>> sound/soc/tegra/tegra_alc5632.c | 28 +-
>> sound/soc/tegra/tegra_asoc_utils.c | 125 ++++----
>> sound/soc/tegra/tegra_asoc_utils.h | 3 +-
>> sound/soc/tegra/tegra_max98090.c | 43 ++-
>> sound/soc/tegra/tegra_rt5640.c | 43 ++-
>> sound/soc/tegra/tegra_rt5677.c | 28 +-
>> sound/soc/tegra/tegra_sgtl5000.c | 28 +-
>> sound/soc/tegra/tegra_wm8753.c | 43 ++-
>> sound/soc/tegra/tegra_wm8903.c | 43 ++-
>> sound/soc/tegra/tegra_wm9712.c | 8 +-
>> sound/soc/tegra/trimslice.c | 39 ++-
>> 49 files changed, 1192 insertions(+), 777 deletions(-)
>> delete mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
>> create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml
>> delete mode 100644 drivers/clk/tegra/clk-tegra-pmc.c
>> create mode 100644 include/dt-bindings/soc/tegra-pmc.h
>>
>> --
>> 2.7.4
>>
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