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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)
145 lines
4.2 KiB
Diff
145 lines
4.2 KiB
Diff
From 5272bad5ff927362e5d12da82eb819a8d1444da6 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Fri, 7 Feb 2020 16:30:01 +0100
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Subject: [PATCH] clk: bcm: rpi: Make the PLLB registration function
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return a clk_hw
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The raspberrypi_register_pllb has been returning an integer so far to
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notify whether the functions has exited successfully or not.
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However, the OF provider functions in the clock framework require access to
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the clk_hw structure so that we can expose those clocks to device tree
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consumers.
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Since we'll want that for the future clocks, let's return a clk_hw pointer
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instead of the return code.
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Cc: Michael Turquette <mturquette@baylibre.com>
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Cc: linux-clk@vger.kernel.org
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Reviewed-by: Stephen Boyd <sboyd@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 | 40 +++++++++++++++++--------------
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1 file changed, 22 insertions(+), 18 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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@@ -190,7 +190,7 @@ static const struct clk_ops raspberrypi_
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.determine_rate = raspberrypi_pll_determine_rate,
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};
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-static int raspberrypi_register_pllb(struct raspberrypi_clk *rpi)
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+static struct clk_hw *raspberrypi_register_pllb(struct raspberrypi_clk *rpi)
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{
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struct raspberrypi_clk_data *data;
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struct clk_init_data init = {};
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@@ -199,7 +199,7 @@ static int raspberrypi_register_pllb(str
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data = devm_kzalloc(rpi->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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- return -ENOMEM;
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+ return ERR_PTR(-ENOMEM);
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data->rpi = rpi;
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data->id = RPI_FIRMWARE_ARM_CLK_ID;
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@@ -217,7 +217,7 @@ static int raspberrypi_register_pllb(str
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if (ret) {
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dev_err(rpi->dev, "Failed to get %s min freq: %d\n",
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init.name, ret);
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- return ret;
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+ return ERR_PTR(ret);
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}
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ret = raspberrypi_clock_property(rpi->firmware, data,
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@@ -226,13 +226,13 @@ static int raspberrypi_register_pllb(str
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if (ret) {
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dev_err(rpi->dev, "Failed to get %s max freq: %d\n",
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init.name, ret);
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- return ret;
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+ return ERR_PTR(ret);
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}
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if (!min_rate || !max_rate) {
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dev_err(rpi->dev, "Unexpected frequency range: min %u, max %u\n",
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min_rate, max_rate);
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- return -EINVAL;
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+ return ERR_PTR(-EINVAL);
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}
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dev_info(rpi->dev, "CPU frequency range: min %u, max %u\n",
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@@ -243,7 +243,11 @@ static int raspberrypi_register_pllb(str
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data->hw.init = &init;
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- return devm_clk_hw_register(rpi->dev, &data->hw);
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+ ret = devm_clk_hw_register(rpi->dev, &data->hw);
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+ if (ret)
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+ return ERR_PTR(ret);
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+
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+ return &data->hw;
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}
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static struct clk_fixed_factor raspberrypi_clk_pllb_arm = {
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@@ -258,14 +262,14 @@ static struct clk_fixed_factor raspberry
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},
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};
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-static int raspberrypi_register_pllb_arm(struct raspberrypi_clk *rpi)
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+static struct clk_hw *raspberrypi_register_pllb_arm(struct raspberrypi_clk *rpi)
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{
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int ret;
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ret = devm_clk_hw_register(rpi->dev, &raspberrypi_clk_pllb_arm.hw);
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if (ret) {
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dev_err(rpi->dev, "Failed to initialize pllb_arm\n");
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- return ret;
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+ return ERR_PTR(ret);
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}
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ret = devm_clk_hw_register_clkdev(rpi->dev,
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@@ -273,10 +277,10 @@ static int raspberrypi_register_pllb_arm
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NULL, "cpu0");
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if (ret) {
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dev_err(rpi->dev, "Failed to initialize clkdev\n");
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- return ret;
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+ return ERR_PTR(ret);
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}
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- return 0;
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+ return &raspberrypi_clk_pllb_arm.hw;
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}
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static int raspberrypi_clk_probe(struct platform_device *pdev)
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@@ -285,7 +289,7 @@ static int raspberrypi_clk_probe(struct
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struct device *dev = &pdev->dev;
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struct rpi_firmware *firmware;
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struct raspberrypi_clk *rpi;
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- int ret;
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+ struct clk_hw *hw;
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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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@@ -305,15 +309,15 @@ static int raspberrypi_clk_probe(struct
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rpi->firmware = firmware;
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platform_set_drvdata(pdev, rpi);
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- ret = raspberrypi_register_pllb(rpi);
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- if (ret) {
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- dev_err(dev, "Failed to initialize pllb, %d\n", ret);
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- return ret;
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+ hw = raspberrypi_register_pllb(rpi);
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+ if (IS_ERR(hw)) {
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+ dev_err(dev, "Failed to initialize pllb, %ld\n", PTR_ERR(hw));
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+ return PTR_ERR(hw);
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}
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- ret = raspberrypi_register_pllb_arm(rpi);
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- if (ret)
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- return ret;
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+ hw = raspberrypi_register_pllb_arm(rpi);
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+ if (IS_ERR(hw))
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+ return PTR_ERR(hw);
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rpi->cpufreq = platform_device_register_data(dev, "raspberrypi-cpufreq",
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-1, NULL, 0);
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