- 20 Jun, 2020 35 commits
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Maxime Ripard authored
The RaspberryPi4 firmware actually exposes more clocks than are currently handled by the driver and we will need to change some of them directly based on the pixel rate for the display related clocks, or the load for the GPU. Since the firmware implements DVFS, this rate change can have a number of side-effects, including adjusting the various PLL voltages or the PLL parents. The firmware also implements thermal throttling, so even some thermal pressure can change those parameters behind Linux back. DVFS is currently implemented on the arm, core, h264, v3d, isp and hevc clocks, so updating any of them using the MMIO driver (and thus behind the firmware's back) can lead to troubles, the arm clock obviously being the most problematic. In order to make Linux play as nice as possible with those constraints, it makes sense to rely on the firmware clocks as much as possible. However, the firmware doesn't seem to provide some equivalents to their MMIO counterparts, so we can't really replace that driver entirely. Fortunately, the firmware has an interface to discover the clocks it exposes. Let's use it to discover, register the clocks in the clocks framework and then expose them through the device tree for consumers to use them. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Acked-by:
Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Reviewed-by:
Stephen Boyd <sboyd@kernel.org> Tested-by:
Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/438d73962741a8c5f7c689319b7443b930a87fde.1592210452.git-series.maxime@cerno.techSigned-off-by:
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Maxime Ripard authored
While the firmware allows us to discover the available clocks, we need to discriminate those clocks to only register the ones meaningful to Linux. The firmware also doesn't provide a clock name, so having a list of the ID will help us to give clocks a proper name later on. Acked-by:
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Maxime Ripard authored
For the upcoming registration of the clocks provided by the firmware, make sure it's exposed to the device tree providers. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The raspberrypi_register_pllb has been returning an integer so far to notify whether the functions has exited successfully or not. However, the OF provider functions in the clock framework require access to the clk_hw structure so that we can expose those clocks to device tree consumers. Since we'll want that for the future clocks, let's return a clk_hw pointer instead of the return code. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The driver only supports the pllb for now and all the clock framework hooks are a mix of the generic firmware interface and the specifics of the pllb. Since we will support more clocks in the future let's split the generic and specific hooks Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The raspberrypi_fw_pll_is_on function doesn't only apply to PLL registered in the driver, but any clock exposed by the firmware. Since we also implement the is_prepared hook, make the function consistent with the other function names. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The raspberry_clock_property only takes the clock ID as an argument, but now that we have a clock data structure it makes more sense to just pass that structure instead. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The driver has really only supported one clock so far and has hardcoded the ID used in communications with the firmware in all the functions implementing the clock framework hooks. Let's store that in the clock data structure so that we can support more clocks later on. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
So far the driver has really only been providing a single clock, and stored both the data associated to that clock in particular with the data associated to the "controller". Since we will change that in the future, let's decouple the clock data from the provider data. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The raspberrypi firmware clock driver has a min_rate / max_rate clamping by storing the info it needs in a private structure. However, the CCF already provides such a facility, so we can switch to it to remove the boilerplate. Reviewed-by:
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Maxime Ripard authored
The clkdev lookup created for the cpufreq device is never removed if there's an issue later in probe or at module removal time. Let's convert to the managed variant of the clk_hw_register_clkdev function to make sure it happens. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
Since we don't care about retrieving the clk_lookup structure pointer returned by clkdev_hw_create, we can just use the clk_hw_register_clkdev function. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The pllb_arm_lookup pointer in the struct raspberrypi_clk is not used for anything but to store the returned pointer to clkdev_hw_create, and is not used anywhere else in the driver. Let's remove that global pointer from the structure. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The pllb_arm clock was created at probe time, but was never removed if something went wrong later in probe, or if the driver was ever removed from the system. Now that we are using clk_hw_register(), we can just use its managed variant to take care of that for us. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The pllb_arm clk_hw pointer in the raspberry_clk structure isn't used anywhere but in the raspberrypi_register_pllb_arm. Let's remove it, this will make our lives easier in future patches. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The pllb_arm clock is defined as a fixed factor clock with the pllb clock as a parent. However, all its configuration is entirely static, and thus we don't really need to call clk_hw_register_fixed_factor() but can simply call clk_hw_register() with a static clk_fixed_factor structure. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
Instead of declaring the clk_init_data and then calling memset on it, just initialise properly. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Acked-by:
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Maxime Ripard authored
The current firmware clock driver for the RaspberryPi can only be probed by manually registering an associated platform_device. While this works fine for cpufreq where the device gets attached a clkdev lookup, it would be tedious to maintain a table of all the devices using one of the clocks exposed by the firmware. Since the DT on the other hand is the perfect place to store those associations, make the firmware clocks driver probe-able through the device tree so that we can represent it as a node. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Reviewed-by:
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Maxime Ripard authored
The firmware clocks driver was previously probed through a platform_device created by the firmware driver. Since we will now have a node for that clocks driver, we need to create the device only in the case where there's no node for it already. Reviewed-by:
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Maxime Ripard authored
The firmware running on the RPi VideoCore can be used to discover and change the various clocks running in the BCM2711. Since devices will need to use them through the DT, let's add a pretty simple binding. Cc: Michael Turquette <mturquette@baylibre.com> Cc: linux-clk@vger.kernel.org Cc: devicetree@vger.kernel.org Reviewed-by:
Rob Herring <robh+dt@kernel.org> Tested-by:
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Florian Fainelli authored
Convert the Raspberry Pi BCM2835 firmware binding document to YAML. Verified with dt_binding_check and dtbs_check. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Tested-by:
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Maxime Ripard authored
The HDMI block has a block that controls clocks and reset signals to the HDMI0 and HDMI1 controllers. Let's expose that through a clock driver implementing a clock and reset provider. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: linux-clk@vger.kernel.org Cc: devicetree@vger.kernel.org Reviewed-by:
Stefan Wahren <stefan.wahren@i2se.com> Reviewed-by:
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Maxime Ripard authored
The BCM2711 has a unit controlling the HDMI0 and HDMI1 clock and reset signals. Let's add a binding for it. Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Reviewed-by:
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git://git.pengutronix.de/git/pza/linuxStephen Boyd authored
Pull immutable reset branch to get reset-simple header. * 'reset/simple' of git://git.pengutronix.de/git/pza/linux: reset: simple: Add reset callback reset: Move reset-simple header out of drivers/reset
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Álvaro Fernández Rojas authored
Now that there are header files for each SoC, let's use them in the bcm63xx-gate controller driver. Signed-off-by:
Álvaro Fernández Rojas <noltari@gmail.com> Link: https://lore.kernel.org/r/20200615090231.2932696-9-noltari@gmail.comAcked-by:
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Álvaro Fernández Rojas authored
Add header with BCM63268 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add header with BCM6368 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add header with BCM6362 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add header with BCM6358 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add header with BCM6328 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add header with BCM6318 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add header with BCM3368 definitions in order to be able to include it from device tree files. Signed-off-by:
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Álvaro Fernández Rojas authored
Add support for the gated clock controllers found on the BCM6318. Signed-off-by:
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Álvaro Fernández Rojas authored
Add BCM6318 to the binding documentation for the gated clock controllers found on BCM63xx SoCs. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Álvaro Fernández Rojas authored
In order to make the last clock available, maxbit has to be set to the highest bit value plus 1. Fixes: 1c099779 ("clk: add BCM63XX gated clock controller driver") Signed-off-by:
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- 16 Jun, 2020 2 commits
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Maxime Ripard authored
The reset-simple code lacks a reset callback that is still pretty easy to implement. The only real thing to consider is the delay needed for a device to be reset, so let's expose that as part of the reset-simple driver data. Reviewed-by:
Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by:
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Maxime Ripard authored
The reset-simple code can be useful for drivers outside of drivers/reset that have a few reset controls as part of their features. Let's move it to include/linux/reset. Reviewed-by:
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- 14 Jun, 2020 3 commits
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Linus Torvalds authored
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git://github.com/micah-morton/linuxLinus Torvalds authored
Pull SafeSetID update from Micah Morton: "Add additional LSM hooks for SafeSetID SafeSetID is capable of making allow/deny decisions for set*uid calls on a system, and we want to add similar functionality for set*gid calls. The work to do that is not yet complete, so probably won't make it in for v5.8, but we are looking to get this simple patch in for v5.8 since we have it ready. We are planning on the rest of the work for extending the SafeSetID LSM being merged during the v5.9 merge window" * tag 'LSM-add-setgid-hook-5.8-author-fix' of git://github.com/micah-morton/linux: security: Add LSM hooks to set*gid syscalls
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Thomas Cedeno authored
The SafeSetID LSM uses the security_task_fix_setuid hook to filter set*uid() syscalls according to its configured security policy. In preparation for adding analagous support in the LSM for set*gid() syscalls, we add the requisite hook here. Tested by putting print statements in the security_task_fix_setgid hook and seeing them get hit during kernel boot. Signed-off-by:
Thomas Cedeno <thomascedeno@google.com> Signed-off-by:
Micah Morton <mortonm@chromium.org>
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