git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From b39d5caa499559be6c309b9fd8f8b2f992504e18 Mon Sep 17 00:00:00 2001
   2 From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
   3 Date: Wed, 12 Jun 2019 20:24:57 +0200
   4 Subject: [PATCH] clk: raspberrypi: register platform device for
   5  raspberrypi-cpufreq
   6
   7 Commit e2bb18347c8e5c4187831f3700c380e3c759601a upstream.
   8
   9 As 'clk-raspberrypi' depends on RPi's firmware interface, which might be
  10 configured as a module, the cpu clock might not be available for the
  11 cpufreq driver during it's init process. So we register the
  12 'raspberrypi-cpufreq' platform device after the probe sequence succeeds.
  13
  14 Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
  15 Acked-by: Eric Anholt <eric@anholt.net>
  16 Signed-off-by: Stephen Boyd <sboyd@kernel.org>
  17 ---
  18  drivers/clk/bcm/clk-raspberrypi.c | 15 +++++++++++++++
  19  1 file changed, 15 insertions(+)
  20
  21 --- a/drivers/clk/bcm/clk-raspberrypi.c
  22 +++ b/drivers/clk/bcm/clk-raspberrypi.c
  23 @@ -34,6 +34,7 @@
  24  struct raspberrypi_clk {
  25         struct device *dev;
  26         struct rpi_firmware *firmware;
  27 +       struct platform_device *cpufreq;
  28
  29         unsigned long min_rate;
  30         unsigned long max_rate;
  31 @@ -272,6 +273,7 @@ static int raspberrypi_clk_probe(struct
  32
  33         rpi->dev = dev;
  34         rpi->firmware = firmware;
  35 +       platform_set_drvdata(pdev, rpi);
  36
  37         ret = raspberrypi_register_pllb(rpi);
  38         if (ret) {
  39 @@ -283,6 +285,18 @@ static int raspberrypi_clk_probe(struct
  40         if (ret)
  41                 return ret;
  42
  43 +       rpi->cpufreq = platform_device_register_data(dev, "raspberrypi-cpufreq",
  44 +                                                    -1, NULL, 0);
  45 +
  46 +       return 0;
  47 +}
  48 +
  49 +static int raspberrypi_clk_remove(struct platform_device *pdev)
  50 +{
  51 +       struct raspberrypi_clk *rpi = platform_get_drvdata(pdev);
  52 +
  53 +       platform_device_unregister(rpi->cpufreq);
  54 +
  55         return 0;
  56  }
  57
  58 @@ -291,6 +305,7 @@ static struct platform_driver raspberryp
  59                 .name = "raspberrypi-clk",
  60         },
  61         .probe          = raspberrypi_clk_probe,
  62 +       .remove         = raspberrypi_clk_remove,
  63  };
  64  module_platform_driver(raspberrypi_clk_driver);
  65