target/linux/ipq806x/patches-3.18/011-watchdog-qcom-use-timer-devicetree-binding.patch

   1 From fded70251b1b58f68de1d3757ece9965f0b75452 Mon Sep 17 00:00:00 2001
   2 From: Mathieu Olivari <mathieu@codeaurora.org>
   3 Date: Thu, 19 Feb 2015 20:19:30 -0800
   4 Subject: [PATCH 1/3] watchdog: qcom: use timer devicetree binding
   5
   6 MSM watchdog configuration happens in the same register block as the
   7 timer, so we'll use the same binding as the existing timer.
   8
   9 The qcom-wdt will now be probed when devicetree has an entry compatible
  10 with "qcom,kpss-timer" or "qcom-scss-timer".
  11
  12 Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
  13 ---
  14  drivers/watchdog/qcom-wdt.c | 21 +++++++++++++++------
  15  1 file changed, 15 insertions(+), 6 deletions(-)
  16
  17 --- a/drivers/watchdog/qcom-wdt.c
  18 +++ b/drivers/watchdog/qcom-wdt.c
  19 @@ -20,9 +20,9 @@
  20  #include <linux/reboot.h>
  21  #include <linux/watchdog.h>
  22
  23 -#define WDT_RST                0x0
  24 -#define WDT_EN         0x8
  25 -#define WDT_BITE_TIME  0x24
  26 +#define WDT_RST                0x38
  27 +#define WDT_EN         0x40
  28 +#define WDT_BITE_TIME  0x5C
  29
  30  struct qcom_wdt {
  31         struct watchdog_device  wdd;
  32 @@ -117,6 +117,8 @@ static int qcom_wdt_probe(struct platfor
  33  {
  34         struct qcom_wdt *wdt;
  35         struct resource *res;
  36 +       struct device_node *np = pdev->dev.of_node;
  37 +       u32 percpu_offset;
  38         int ret;
  39
  40         wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
  41 @@ -124,6 +126,14 @@ static int qcom_wdt_probe(struct platfor
  42                 return -ENOMEM;
  43
  44         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  45 +
  46 +       /* We use CPU0's DGT for the watchdog */
  47 +       if (of_property_read_u32(np, "cpu-offset", &percpu_offset))
  48 +               percpu_offset = 0;
  49 +
  50 +       res->start += percpu_offset;
  51 +       res->end += percpu_offset;
  52 +
  53         wdt->base = devm_ioremap_resource(&pdev->dev, res);
  54         if (IS_ERR(wdt->base))
  55                 return PTR_ERR(wdt->base);
  56 @@ -203,9 +213,8 @@ static int qcom_wdt_remove(struct platfo
  57  }
  58
  59  static const struct of_device_id qcom_wdt_of_table[] = {
  60 -       { .compatible = "qcom,kpss-wdt-msm8960", },
  61 -       { .compatible = "qcom,kpss-wdt-apq8064", },
  62 -       { .compatible = "qcom,kpss-wdt-ipq8064", },
  63 +       { .compatible = "qcom,kpss-timer" },
  64 +       { .compatible = "qcom,scss-timer" },
  65         { },
  66  };
  67  MODULE_DEVICE_TABLE(of, qcom_wdt_of_table);