target/linux/mediatek/patches-4.4/0044-mfd-mt6397-add-support-for-different-Slave-types.patch

   1 From 1ef53a11f0c282008aa572eb7c97fa1e79621ea3 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Fri, 8 Jan 2016 08:41:52 +0100
   4 Subject: [PATCH 44/81] mfd: mt6397: add support for different Slave types
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  drivers/mfd/mt6397-core.c |   58 ++++++++++++++++++++++++++++++++-------------
   9  1 file changed, 41 insertions(+), 17 deletions(-)
  10
  11 diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
  12 index 75ad0fe..aa91606 100644
  13 --- a/drivers/mfd/mt6397-core.c
  14 +++ b/drivers/mfd/mt6397-core.c
  15 @@ -24,6 +24,9 @@
  16  #define MT6397_RTC_BASE                0xe000
  17  #define MT6397_RTC_SIZE                0x3e
  18
  19 +#define MT6391_CID_CODE                0x91
  20 +#define MT6397_CID_CODE                0x97
  21 +
  22  static const struct resource mt6397_rtc_resources[] = {
  23         {
  24                 .start = MT6397_RTC_BASE,
  25 @@ -232,39 +235,60 @@ static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_irq_suspend,
  26  static int mt6397_probe(struct platform_device *pdev)
  27  {
  28         int ret;
  29 -       struct mt6397_chip *mt6397;
  30 +       unsigned int id;
  31 +       struct mt6397_chip *pmic;
  32
  33 -       mt6397 = devm_kzalloc(&pdev->dev, sizeof(*mt6397), GFP_KERNEL);
  34 -       if (!mt6397)
  35 +       pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
  36 +       if (!pmic)
  37                 return -ENOMEM;
  38
  39 -       mt6397->dev = &pdev->dev;
  40 -       mt6397->int_con[0] = MT6397_INT_CON0;
  41 -       mt6397->int_con[1] = MT6397_INT_CON1;
  42 -       mt6397->int_status[0] = MT6397_INT_STATUS0;
  43 -       mt6397->int_status[1] = MT6397_INT_STATUS1;
  44 +       pmic->dev = &pdev->dev;
  45
  46         /*
  47          * mt6397 MFD is child device of soc pmic wrapper.
  48          * Regmap is set from its parent.
  49          */
  50 -       mt6397->regmap = dev_get_regmap(pdev->dev.parent, NULL);
  51 -       if (!mt6397->regmap)
  52 +       pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
  53 +       if (!pmic->regmap)
  54                 return -ENODEV;
  55
  56 -       platform_set_drvdata(pdev, mt6397);
  57 +       platform_set_drvdata(pdev, pmic);
  58 +
  59 +       ret = regmap_read(pmic->regmap, MT6397_CID, &id);
  60 +       if (ret) {
  61 +               dev_err(pmic->dev, "Failed to read chip id: %d\n", ret);
  62 +               goto fail_irq;
  63 +       }
  64 +
  65 +       switch (id & 0xff) {
  66 +       case MT6397_CID_CODE:
  67 +       case MT6391_CID_CODE:
  68 +               pmic->int_con[0] = MT6397_INT_CON0;
  69 +               pmic->int_con[1] = MT6397_INT_CON1;
  70 +               pmic->int_status[0] = MT6397_INT_STATUS0;
  71 +               pmic->int_status[1] = MT6397_INT_STATUS1;
  72 +               ret = mfd_add_devices(&pdev->dev, -1, mt6397_devs,
  73 +                               ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
  74 +               break;
  75 +
  76 +       default:
  77 +               dev_err(&pdev->dev, "unsupported chip: %d\n", id);
  78 +               ret = -ENODEV;
  79 +               break;
  80 +       }
  81
  82 -       mt6397->irq = platform_get_irq(pdev, 0);
  83 -       if (mt6397->irq > 0) {
  84 -               ret = mt6397_irq_init(mt6397);
  85 +       pmic->irq = platform_get_irq(pdev, 0);
  86 +       if (pmic->irq > 0) {
  87 +               ret = mt6397_irq_init(pmic);
  88                 if (ret)
  89                         return ret;
  90         }
  91
  92 -       ret = mfd_add_devices(&pdev->dev, -1, mt6397_devs,
  93 -                       ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
  94 -       if (ret)
  95 +fail_irq:
  96 +       if (ret) {
  97 +               irq_domain_remove(pmic->irq_domain);
  98                 dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
  99 +       }
 100
 101         return ret;
 102  }
 103 --
 104 1.7.10.4
 105