From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: stefan.wahren@i2se.com, linux-kernel@vger.kernel.org
Cc: mbrugger@suse.de, viresh.kumar@linaro.org, rjw@rjwysocki.net,
sboyd@kernel.org, eric@anholt.net, f.fainelli@gmail.com,
bcm-kernel-feedback-list@broadcom.com, ptesarik@suse.com,
linux-rpi-kernel@lists.infradead.org, ssuloev@orpaltech.com,
linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
mturquette@baylibre.com, linux-pm@vger.kernel.org,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Subject: [PATCH v4 5/7] clk: raspberrypi: register platform device for raspberrypi-cpufreq
Date: Wed, 12 Jun 2019 20:24:57 +0200 [thread overview]
Message-ID: <20190612182500.4097-6-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20190612182500.4097-1-nsaenzjulienne@suse.de>
As 'clk-raspberrypi' depends on RPi's firmware interface, which might be
configured as a module, the cpu clock might not be available for the
cpufreq driver during it's init process. So we register the
'raspberrypi-cpufreq' platform device after the probe sequence succeeds.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Eric Anholt <eric@anholt.net>
---
Changes since v2:
- Use raspberrypi_clk struct to store cpufreq platform_device
drivers/clk/bcm/clk-raspberrypi.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index fef1f7caee4f..1654fd0eedc9 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -34,6 +34,7 @@
struct raspberrypi_clk {
struct device *dev;
struct rpi_firmware *firmware;
+ struct platform_device *cpufreq;
unsigned long min_rate;
unsigned long max_rate;
@@ -272,6 +273,7 @@ static int raspberrypi_clk_probe(struct platform_device *pdev)
rpi->dev = dev;
rpi->firmware = firmware;
+ platform_set_drvdata(pdev, rpi);
ret = raspberrypi_register_pllb(rpi);
if (ret) {
@@ -283,6 +285,18 @@ static int raspberrypi_clk_probe(struct platform_device *pdev)
if (ret)
return ret;
+ rpi->cpufreq = platform_device_register_data(dev, "raspberrypi-cpufreq",
+ -1, NULL, 0);
+
+ return 0;
+}
+
+static int raspberrypi_clk_remove(struct platform_device *pdev)
+{
+ struct raspberrypi_clk *rpi = platform_get_drvdata(pdev);
+
+ platform_device_unregister(rpi->cpufreq);
+
return 0;
}
@@ -291,6 +305,7 @@ static struct platform_driver raspberrypi_clk_driver = {
.name = "raspberrypi-clk",
},
.probe = raspberrypi_clk_probe,
+ .remove = raspberrypi_clk_remove,
};
module_platform_driver(raspberrypi_clk_driver);
--
2.21.0
next prev parent reply other threads:[~2019-06-12 18:25 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 18:24 [PATCH v4 0/7] cpufreq support for Raspberry Pi Nicolas Saenz Julienne
2019-06-12 18:24 ` [PATCH v4 1/7] clk: bcm2835: remove pllb Nicolas Saenz Julienne
2019-06-25 23:04 ` Stephen Boyd
2019-06-12 18:24 ` [PATCH v4 2/7] clk: bcm283x: add driver interfacing with Raspberry Pi's firmware Nicolas Saenz Julienne
2019-06-25 23:04 ` Stephen Boyd
2019-06-12 18:24 ` [PATCH v4 3/7] firmware: raspberrypi: register clk device Nicolas Saenz Julienne
2019-06-25 23:04 ` Stephen Boyd
2019-06-12 18:24 ` [PATCH v4 4/7] cpufreq: add driver for Raspberry Pi Nicolas Saenz Julienne
2019-06-13 3:28 ` Viresh Kumar
2019-06-12 18:24 ` Nicolas Saenz Julienne [this message]
2019-06-25 23:05 ` [PATCH v4 5/7] clk: raspberrypi: register platform device for raspberrypi-cpufreq Stephen Boyd
2019-06-12 18:24 ` [PATCH v4 6/7] ARM: defconfig: enable cpufreq driver for RPi Nicolas Saenz Julienne
2019-07-23 21:33 ` Stefan Wahren
2019-06-12 18:24 ` [PATCH v4 7/7] arm64: defconfig: enable cpufreq support for RPi3 Nicolas Saenz Julienne
2019-07-23 21:34 ` Stefan Wahren
2019-06-12 20:17 ` [PATCH v4 0/7] cpufreq support for Raspberry Pi Stefan Wahren
2019-06-13 3:31 ` Florian Fainelli
2019-06-13 4:31 ` Stefan Wahren
2019-06-22 9:54 ` Stefan Wahren
2019-06-25 23:02 ` Stephen Boyd
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