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62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
61 lines
2.0 KiB
Diff
61 lines
2.0 KiB
Diff
From faeea753ba262e2a781570f9db23c5773c5d20e7 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Mon, 23 Dec 2019 19:58:08 +0100
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Subject: [PATCH] clk: bcm: rpi: Allow the driver to be probed by DT
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The current firmware clock driver for the RaspberryPi can only be probed by
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manually registering an associated platform_device.
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While this works fine for cpufreq where the device gets attached a clkdev
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lookup, it would be tedious to maintain a table of all the devices using
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one of the clocks exposed by the firmware.
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Since the DT on the other hand is the perfect place to store those
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associations, make the firmware clocks driver probe-able through the device
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tree so that we can represent it as a node.
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Cc: Michael Turquette <mturquette@baylibre.com>
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Cc: Stephen Boyd <sboyd@kernel.org>
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Cc: linux-clk@vger.kernel.org
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/clk/bcm/clk-raspberrypi.c | 11 ++++++++---
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1 file changed, 8 insertions(+), 3 deletions(-)
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--- a/drivers/clk/bcm/clk-raspberrypi.c
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+++ b/drivers/clk/bcm/clk-raspberrypi.c
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@@ -255,15 +255,13 @@ static int raspberrypi_clk_probe(struct
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struct raspberrypi_clk *rpi;
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int ret;
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- firmware_node = of_find_compatible_node(NULL, NULL,
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- "raspberrypi,bcm2835-firmware");
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+ firmware_node = of_parse_phandle(dev->of_node, "raspberrypi,firmware", 0);
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if (!firmware_node) {
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dev_err(dev, "Missing firmware node\n");
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return -ENOENT;
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}
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firmware = rpi_firmware_get(firmware_node);
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- of_node_put(firmware_node);
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if (!firmware)
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return -EPROBE_DEFER;
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@@ -300,9 +298,16 @@ static int raspberrypi_clk_remove(struct
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return 0;
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}
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+static const struct of_device_id raspberrypi_clk_match[] = {
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+ { .compatible = "raspberrypi,firmware-clocks" },
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+ { },
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+};
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+MODULE_DEVICE_TABLE(of, raspberrypi_clk_match);
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+
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static struct platform_driver raspberrypi_clk_driver = {
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.driver = {
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.name = "raspberrypi-clk",
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+ .of_match_table = raspberrypi_clk_match,
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},
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.probe = raspberrypi_clk_probe,
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.remove = raspberrypi_clk_remove,
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