[PATCH v4 5/7] clk: raspberrypi: register platform device for raspberrypi-cpufreq

[Nicolas Saenz Julienne]

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 <nsaenzjulie...@suse.de>
Acked-by: Eric Anholt <e...@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