[PATCH V2 3/4] mfd: mediatek: add support for different Slave types

[John Crispin]

Signed-off-by: John Crispin <blo...@openwrt.org>
---
 drivers/mfd/mt6397-core.c |   38 +++++++++++++++++++++++++++++++-------
 1 file changed, 31 insertions(+), 7 deletions(-)

diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
index 75ad0fe..51e194b 100644
--- a/drivers/mfd/mt6397-core.c
+++ b/drivers/mfd/mt6397-core.c
@@ -24,6 +24,9 @@
 #define MT6397_RTC_BASE                0xe000
 #define MT6397_RTC_SIZE                0x3e
 
+#define MT6391_CID_CODE                0x91
+#define MT6397_CID_CODE                0x97
+
 static const struct resource mt6397_rtc_resources[] = {
        {
                .start = MT6397_RTC_BASE,
@@ -232,6 +235,7 @@ static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_irq_suspend,
 static int mt6397_probe(struct platform_device *pdev)
 {
        int ret;
+       unsigned int id;
        struct mt6397_chip *mt6397;
 
        mt6397 = devm_kzalloc(&pdev->dev, sizeof(*mt6397), GFP_KERNEL);
@@ -239,10 +243,6 @@ static int mt6397_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        mt6397->dev = &pdev->dev;
-       mt6397->int_con[0] = MT6397_INT_CON0;
-       mt6397->int_con[1] = MT6397_INT_CON1;
-       mt6397->int_status[0] = MT6397_INT_STATUS0;
-       mt6397->int_status[1] = MT6397_INT_STATUS1;
 
        /*
         * mt6397 MFD is child device of soc pmic wrapper.
@@ -254,6 +254,29 @@ static int mt6397_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, mt6397);
 
+       ret = regmap_read(mt6397->regmap, MT6397_CID, &id);
+       if (ret) {
+               dev_err(mt6397->dev, "Failed to read chip id: %d\n", ret);
+               goto fail_irq;
+       }
+
+       switch (id & 0xff) {
+       case MT6397_CID_CODE:
+       case MT6391_CID_CODE:
+               mt6397->int_con[0] = MT6397_INT_CON0;
+               mt6397->int_con[1] = MT6397_INT_CON1;
+               mt6397->int_status[0] = MT6397_INT_STATUS0;
+               mt6397->int_status[1] = MT6397_INT_STATUS1;
+               ret = mfd_add_devices(&pdev->dev, -1, mt6397_devs,
+                               ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
+               break;
+
+       default:
+               dev_err(&pdev->dev, "unsupported chip: %d\n", id);
+               ret = -ENODEV;
+               break;
+       }
+
        mt6397->irq = platform_get_irq(pdev, 0);
        if (mt6397->irq > 0) {
                ret = mt6397_irq_init(mt6397);
@@ -261,10 +284,11 @@ static int mt6397_probe(struct platform_device *pdev)
                        return ret;
        }
 
-       ret = mfd_add_devices(&pdev->dev, -1, mt6397_devs,
-                       ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
-       if (ret)
+fail_irq:
+       if (ret) {
+               irq_domain_remove(mt6397->irq_domain);
                dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
+       }
 
        return ret;
 }
-- 
1.7.10.4