target/linux/brcm63xx/patches-4.9/001-4.12-04-spi-bcm63xx-hsspi-allow-providing-clock-rate-through.patch

   1 From d03f23df6ff47898d76f06b3aa5dadcfa1ec8f4f Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jonas.gorski@gmail.com>
   3 Date: Sun, 19 Feb 2017 23:40:22 +0100
   4 Subject: [PATCH 1/3] spi/bcm63xx-hsspi: allow providing clock rate through a
   5  second clock
   6
   7 Instead of requiring the hsspi clock to have a rate, allow using a second
   8 clock for providing the Hz rate, which is probably more correct anyway.
   9
  10 Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  11 ---
  12  drivers/spi/spi-bcm63xx-hsspi.c | 12 ++++++++++--
  13  1 file changed, 10 insertions(+), 2 deletions(-)
  14
  15 --- a/drivers/spi/spi-bcm63xx-hsspi.c
  16 +++ b/drivers/spi/spi-bcm63xx-hsspi.c
  17 @@ -351,8 +351,16 @@ static int bcm63xx_hsspi_probe(struct pl
  18                 return PTR_ERR(clk);
  19
  20         rate = clk_get_rate(clk);
  21 -       if (!rate)
  22 -               return -EINVAL;
  23 +       if (!rate) {
  24 +               struct clk *pll_clk = devm_clk_get(dev, "pll");
  25 +
  26 +               if (IS_ERR(pll_clk))
  27 +                       return PTR_ERR(pll_clk);
  28 +
  29 +               rate = clk_get_rate(pll_clk);
  30 +               if (!rate)
  31 +                       return -EINVAL;
  32 +       }
  33
  34         ret = clk_prepare_enable(clk);
  35         if (ret)