From: Maxime Ripard <maxime@cerno.tech> To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Cc: linux-rpi-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Dave Stevenson <dave.stevenson@raspberrypi.com>, Tim Gover <tim.gover@raspberrypi.com>, Phil Elwell <phil@raspberrypi.com>, Maxime Ripard <maxime@cerno.tech>, Michael Turquette <mturquette@baylibre.com>, Stephen Boyd <sboyd@kernel.org>, linux-clk@vger.kernel.org Subject: [PATCH v3 04/25] clk: bcm: rpi: Allow the driver to be probed by DT Date: Wed, 27 May 2020 17:45:00 +0200 [thread overview] Message-ID: <fa709f71b27aadf987685f7cae2a65cc3cef8e3d.1590594293.git-series.maxime@cerno.tech> (raw) In-Reply-To: <cover.662a8d401787ef33780d91252a352de91dc4be10.1590594293.git-series.maxime@cerno.tech> 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: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Signed-off-by: Maxime Ripard <maxime@cerno.tech> --- drivers/clk/bcm/clk-raspberrypi.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c index 1654fd0eedc9..8610355bda47 100644 --- a/drivers/clk/bcm/clk-raspberrypi.c +++ b/drivers/clk/bcm/clk-raspberrypi.c @@ -255,8 +255,16 @@ static int raspberrypi_clk_probe(struct platform_device *pdev) struct raspberrypi_clk *rpi; int ret; - firmware_node = of_find_compatible_node(NULL, NULL, - "raspberrypi,bcm2835-firmware"); + /* + * We can be probed either through the an old-fashioned + * platform device registration or through a DT node that is a + * child of the firmware node. Handle both cases. + */ + if (dev->of_node) + firmware_node = of_get_parent(dev->of_node); + else + firmware_node = of_find_compatible_node(NULL, NULL, + "raspberrypi,bcm2835-firmware"); if (!firmware_node) { dev_err(dev, "Missing firmware node\n"); return -ENOENT; @@ -300,9 +308,16 @@ static int raspberrypi_clk_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id raspberrypi_clk_match[] = { + { .compatible = "raspberrypi,firmware-clocks" }, + { }, +}; +MODULE_DEVICE_TABLE(of, raspberrypi_clk_match); + static struct platform_driver raspberrypi_clk_driver = { .driver = { .name = "raspberrypi-clk", + .of_match_table = raspberrypi_clk_match, }, .probe = raspberrypi_clk_probe, .remove = raspberrypi_clk_remove, -- git-series 0.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime@cerno.tech> To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Cc: Tim Gover <tim.gover@raspberrypi.com>, Dave Stevenson <dave.stevenson@raspberrypi.com>, Stephen Boyd <sboyd@kernel.org>, Michael Turquette <mturquette@baylibre.com>, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Phil Elwell <phil@raspberrypi.com>, linux-arm-kernel@lists.infradead.org, Maxime Ripard <maxime@cerno.tech> Subject: [PATCH v3 04/25] clk: bcm: rpi: Allow the driver to be probed by DT Date: Wed, 27 May 2020 17:45:00 +0200 [thread overview] Message-ID: <fa709f71b27aadf987685f7cae2a65cc3cef8e3d.1590594293.git-series.maxime@cerno.tech> (raw) In-Reply-To: <cover.662a8d401787ef33780d91252a352de91dc4be10.1590594293.git-series.maxime@cerno.tech> 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: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Signed-off-by: Maxime Ripard <maxime@cerno.tech> --- drivers/clk/bcm/clk-raspberrypi.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c index 1654fd0eedc9..8610355bda47 100644 --- a/drivers/clk/bcm/clk-raspberrypi.c +++ b/drivers/clk/bcm/clk-raspberrypi.c @@ -255,8 +255,16 @@ static int raspberrypi_clk_probe(struct platform_device *pdev) struct raspberrypi_clk *rpi; int ret; - firmware_node = of_find_compatible_node(NULL, NULL, - "raspberrypi,bcm2835-firmware"); + /* + * We can be probed either through the an old-fashioned + * platform device registration or through a DT node that is a + * child of the firmware node. Handle both cases. + */ + if (dev->of_node) + firmware_node = of_get_parent(dev->of_node); + else + firmware_node = of_find_compatible_node(NULL, NULL, + "raspberrypi,bcm2835-firmware"); if (!firmware_node) { dev_err(dev, "Missing firmware node\n"); return -ENOENT; @@ -300,9 +308,16 @@ static int raspberrypi_clk_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id raspberrypi_clk_match[] = { + { .compatible = "raspberrypi,firmware-clocks" }, + { }, +}; +MODULE_DEVICE_TABLE(of, raspberrypi_clk_match); + static struct platform_driver raspberrypi_clk_driver = { .driver = { .name = "raspberrypi-clk", + .of_match_table = raspberrypi_clk_match, }, .probe = raspberrypi_clk_probe, .remove = raspberrypi_clk_remove, -- git-series 0.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-05-27 15:47 UTC|newest] Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-27 15:44 [PATCH v3 00/25] clk: bcm: rpi: Add support for BCM2711 firmware clocks Maxime Ripard 2020-05-27 15:44 ` Maxime Ripard 2020-05-27 15:44 ` [PATCH v3 01/25] dt-bindings: arm: bcm: Convert BCM2835 firmware binding to YAML Maxime Ripard 2020-05-27 15:44 ` Maxime Ripard 2020-05-27 15:44 ` [PATCH v3 02/25] dt-bindings: clock: Add a binding for the RPi Firmware clocks Maxime Ripard 2020-05-27 15:44 ` Maxime Ripard 2020-05-29 18:14 ` Rob Herring 2020-05-29 18:14 ` Rob Herring 2020-05-29 21:17 ` Stephen Boyd 2020-05-29 21:17 ` Stephen Boyd 2020-05-30 16:23 ` Maxime Ripard 2020-05-30 16:23 ` Maxime Ripard 2020-05-27 15:44 ` [PATCH v3 03/25] firmware: rpi: Only create clocks device if we don't have a node for it Maxime Ripard 2020-05-27 15:44 ` Maxime Ripard 2020-06-04 17:50 ` Nicolas Saenz Julienne 2020-06-04 17:50 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` Maxime Ripard [this message] 2020-05-27 15:45 ` [PATCH v3 04/25] clk: bcm: rpi: Allow the driver to be probed by DT Maxime Ripard 2020-05-29 21:17 ` Stephen Boyd 2020-05-29 21:17 ` Stephen Boyd 2020-06-04 17:52 ` Nicolas Saenz Julienne 2020-06-04 17:52 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 05/25] clk: bcm: rpi: Statically init clk_init_data Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 06/25] clk: bcm: rpi: Use clk_hw_register for pllb_arm Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 07/25] clk: bcm: rpi: Remove global pllb_arm clock pointer Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 08/25] clk: bcm: rpi: Make sure pllb_arm is removed Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 09/25] clk: bcm: rpi: Remove pllb_arm_lookup global pointer Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 10/25] clk: bcm: rpi: Switch to clk_hw_register_clkdev Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 11/25] clk: bcm: rpi: Make sure the clkdev lookup is removed Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 12/25] clk: bcm: rpi: Use CCF boundaries instead of rolling our own Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-04 18:02 ` Nicolas Saenz Julienne 2020-06-04 18:02 ` Nicolas Saenz Julienne 2020-06-05 9:28 ` Maxime Ripard 2020-06-05 9:28 ` Maxime Ripard 2020-06-05 9:34 ` Nicolas Saenz Julienne 2020-06-05 9:34 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 13/25] clk: bcm: rpi: Create a data structure for the clocks Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 14/25] clk: bcm: rpi: Add clock id to data Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 15/25] clk: bcm: rpi: Pass the clocks data to the firmware function Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 16/25] clk: bcm: rpi: Rename is_prepared function Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 17/25] clk: bcm: rpi: Split pllb clock hooks Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-05 10:34 ` Nicolas Saenz Julienne 2020-06-05 10:34 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 18/25] clk: bcm: rpi: Make the PLLB registration function return a clk_hw Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-05 10:38 ` Nicolas Saenz Julienne 2020-06-05 10:38 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 19/25] clk: bcm: rpi: Add DT provider for the clocks Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-05 10:42 ` Nicolas Saenz Julienne 2020-06-05 10:42 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 20/25] clk: bcm: rpi: Add an enum for the firmware clocks Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-05 12:04 ` Nicolas Saenz Julienne 2020-06-05 12:04 ` Nicolas Saenz Julienne 2020-06-05 13:09 ` Nicolas Saenz Julienne 2020-06-05 13:09 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 21/25] clk: bcm: rpi: Discover " Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-05 12:45 ` Nicolas Saenz Julienne 2020-06-05 12:45 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 22/25] clk: bcm: rpi: Give firmware clocks a name Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-06-05 12:49 ` Nicolas Saenz Julienne 2020-06-05 12:49 ` Nicolas Saenz Julienne 2020-05-27 15:45 ` [PATCH v3 23/25] Revert "clk: bcm2835: remove pllb" Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 24/25] clk: bcm: rpi: Remove the quirks for the CPU clock Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard 2020-05-27 15:45 ` [PATCH v3 25/25] ARM: dts: bcm2711: Add firmware clocks node Maxime Ripard 2020-05-27 15:45 ` Maxime Ripard
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