[PATCH] mfd: intel_soc_pmic_bxtwc: add bxt_wcove_usbc device

[Bin Gao]

The Intel Whiskey Cove PMIC includes several function units, e.g.
ADC, thermal, USB Type-C, GPIO, etc. The corresponding device has
to be created in the mfd driver(intel_soc_pmic_bxtwc.c). This change
adds the USB Type-c device.

Signed-off-by: Bin Gao <bin....@intel.com>
---
 drivers/mfd/intel_soc_pmic_bxtwc.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/intel_soc_pmic_bxtwc.c 
b/drivers/mfd/intel_soc_pmic_bxtwc.c
index b942876..43e54b7 100644
--- a/drivers/mfd/intel_soc_pmic_bxtwc.c
+++ b/drivers/mfd/intel_soc_pmic_bxtwc.c
@@ -47,6 +47,8 @@
 #define BXTWC_MIRQLVL1         0x4E0E
 #define BXTWC_MPWRTNIRQ                0x4E0F
 
+#define BXTWC_MIRQLVL1_MCHGR   BIT(5)
+
 #define BXTWC_MTHRM0IRQ                0x4E12
 #define BXTWC_MTHRM1IRQ                0x4E13
 #define BXTWC_MTHRM2IRQ                0x4E14
@@ -109,7 +111,7 @@ static const struct regmap_irq bxtwc_regmap_irqs_level2[] = 
{
        REGMAP_IRQ_REG(BXTWC_THRM2_IRQ, 2, 0xff),
        REGMAP_IRQ_REG(BXTWC_BCU_IRQ, 3, 0x1f),
        REGMAP_IRQ_REG(BXTWC_ADC_IRQ, 4, 0xff),
-       REGMAP_IRQ_REG(BXTWC_CHGR0_IRQ, 5, 0x1f),
+       REGMAP_IRQ_REG(BXTWC_CHGR0_IRQ, 5, 0x3f),
        REGMAP_IRQ_REG(BXTWC_CHGR1_IRQ, 6, 0x1f),
        REGMAP_IRQ_REG(BXTWC_GPIO0_IRQ, 7, 0xff),
        REGMAP_IRQ_REG(BXTWC_GPIO1_IRQ, 8, 0x3f),
@@ -143,6 +145,10 @@ static struct resource adc_resources[] = {
        DEFINE_RES_IRQ_NAMED(BXTWC_ADC_IRQ, "ADC"),
 };
 
+static struct resource usbc_resources[] = {
+       DEFINE_RES_IRQ_NAMED(BXTWC_CHGR0_IRQ, "USBC"),
+};
+
 static struct resource charger_resources[] = {
        DEFINE_RES_IRQ_NAMED(BXTWC_CHGR0_IRQ, "CHARGER"),
        DEFINE_RES_IRQ_NAMED(BXTWC_CHGR1_IRQ, "CHARGER1"),
@@ -170,6 +176,11 @@ static struct mfd_cell bxt_wc_dev[] = {
                .resources = thermal_resources,
        },
        {
+               .name = "bxt_wcove_usbc",
+               .num_resources = ARRAY_SIZE(usbc_resources),
+               .resources = usbc_resources,
+       },
+       {
                .name = "bxt_wcove_ext_charger",
                .num_resources = ARRAY_SIZE(charger_resources),
                .resources = charger_resources,
@@ -403,6 +414,16 @@ static int bxtwc_probe(struct platform_device *pdev)
                goto err_sysfs;
        }
 
+       /*
+        * There is known hw bug. Upon reset BIT 5 of register
+        * BXTWC_CHGR_LVL1_IRQ is 0 which is the expected value. However,
+        * later it's set to 1(masked) automatically by hardware. So we
+        * have the software workaround here to unmaksed it in order to let
+        * charger interrutp work.
+        */
+       regmap_update_bits(pmic->regmap, BXTWC_MIRQLVL1,
+                               BXTWC_MIRQLVL1_MCHGR, 0);
+
        return 0;
 
 err_sysfs:
-- 
1.9.1