target/linux/ipq806x/patches-5.4/0076-watchdog-qcom-wdt-disable-pretimeout-on-timer-platfo.patch

   1 From 53ae145a7afa7686e03332d61eed90b7fa7c2529 Mon Sep 17 00:00:00 2001
   2 From: Ansuel Smith <ansuelsmth@gmail.com>
   3 Date: Tue, 4 Feb 2020 19:38:06 +0100
   4 Subject: [PATCH v2] watchdog: qcom-wdt: disable pretimeout on timer platform
   5
   6 Some platform like ipq806x doesn't support pretimeout and define
   7 some interrupts used by qcom,msm-timer. Change the driver to check
   8 and use pretimeout only on qcom,kpss-wdt as it's the only platform
   9 that actually supports it.
  10
  11 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
  12 ---
  13  drivers/watchdog/qcom-wdt.c | 31 +++++++++++++++++++++++--------
  14  1 file changed, 23 insertions(+), 8 deletions(-)
  15
  16 --- a/drivers/watchdog/qcom-wdt.c
  17 +++ b/drivers/watchdog/qcom-wdt.c
  18 @@ -40,6 +40,11 @@ static const u32 reg_offset_data_kpss[]
  19         [WDT_BITE_TIME] = 0x14,
  20  };
  21
  22 +struct qcom_wdt_match_data {
  23 +       const u32 *offset;
  24 +       bool pretimeout;
  25 +};
  26 +
  27  struct qcom_wdt {
  28         struct watchdog_device  wdd;
  29         unsigned long           rate;
  30 @@ -179,19 +184,29 @@ static void qcom_clk_disable_unprepare(v
  31         clk_disable_unprepare(data);
  32  }
  33
  34 +static const struct qcom_wdt_match_data match_data_apcs_tmr = {
  35 +       .offset = reg_offset_data_apcs_tmr,
  36 +       .pretimeout = false,
  37 +};
  38 +
  39 +static const struct qcom_wdt_match_data match_data_kpss = {
  40 +       .offset = reg_offset_data_kpss,
  41 +       .pretimeout = true,
  42 +};
  43 +
  44  static int qcom_wdt_probe(struct platform_device *pdev)
  45  {
  46         struct device *dev = &pdev->dev;
  47         struct qcom_wdt *wdt;
  48         struct resource *res;
  49         struct device_node *np = dev->of_node;
  50 -       const u32 *regs;
  51 +       const struct qcom_wdt_match_data *data;
  52         u32 percpu_offset;
  53         int irq, ret;
  54         struct clk *clk;
  55
  56 -       regs = of_device_get_match_data(dev);
  57 -       if (!regs) {
  58 +       data = of_device_get_match_data(dev);
  59 +       if (!data) {
  60                 dev_err(dev, "Unsupported QCOM WDT module\n");
  61                 return -ENODEV;
  62         }
  63 @@ -247,7 +262,7 @@ static int qcom_wdt_probe(struct platfor
  64
  65         /* check if there is pretimeout support */
  66         irq = platform_get_irq_optional(pdev, 0);
  67 -       if (irq > 0) {
  68 +       if (data->pretimeout && irq > 0) {
  69                 ret = devm_request_irq(dev, irq, qcom_wdt_isr,
  70                                        IRQF_TRIGGER_RISING,
  71                                        "wdt_bark", &wdt->wdd);
  72 @@ -267,7 +282,7 @@ static int qcom_wdt_probe(struct platfor
  73         wdt->wdd.min_timeout = 1;
  74         wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
  75         wdt->wdd.parent = dev;
  76 -       wdt->layout = regs;
  77 +       wdt->layout = data->offset;
  78
  79         if (readl(wdt_addr(wdt, WDT_STS)) & 1)
  80                 wdt->wdd.bootstatus = WDIOF_CARDRESET;
  81 @@ -311,9 +326,9 @@ static int __maybe_unused qcom_wdt_resum
  82  static SIMPLE_DEV_PM_OPS(qcom_wdt_pm_ops, qcom_wdt_suspend, qcom_wdt_resume);
  83
  84  static const struct of_device_id qcom_wdt_of_table[] = {
  85 -       { .compatible = "qcom,kpss-timer", .data = reg_offset_data_apcs_tmr },
  86 -       { .compatible = "qcom,scss-timer", .data = reg_offset_data_apcs_tmr },
  87 -       { .compatible = "qcom,kpss-wdt", .data = reg_offset_data_kpss },
  88 +       { .compatible = "qcom,kpss-timer", .data = &match_data_apcs_tmr },
  89 +       { .compatible = "qcom,scss-timer", .data = &match_data_apcs_tmr },
  90 +       { .compatible = "qcom,kpss-wdt", .data = &match_data_kpss },
  91         { },
  92  };
  93  MODULE_DEVICE_TABLE(of, qcom_wdt_of_table);