espi: it8xxx2: reset PLTRST# virtual wire signal during eSPI reset

The PLTRST# virtual wire signal's reset signal is eSPI Reset#. But it8xxx2 didn't enable the feature by default. This change will enable the feature at default. Signed-off-by: Dino Li <[email protected]>
zephyrproject-rtos · Nov 7, 2022 · 8665db1 · 8665db1
1 parent 9054435
commit 8665db1
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/drivers/espi/espi_it8xxx2.c b/drivers/espi/espi_it8xxx2.c
@@ -47,6 +47,12 @@ LOG_MODULE_REGISTER(espi, CONFIG_ESPI_LOG_LEVEL);
 #define IT8XXX2_ESPI_VW_INTERRUPT_ENABLE       BIT(7)
 #define IT8XXX2_ESPI_INTERRUPT_PUT_PC          BIT(7)
 
+/*
+ * VWCTRL2 register:
+ * bit4 = 1b: Refers to ESPI_RESET# for PLTRST#.
+ */
+#define IT8XXX2_ESPI_VW_RESET_PLTRST           BIT(4)
+
 #define IT8XXX2_ESPI_UPSTREAM_ENABLE           BIT(7)
 #define IT8XXX2_ESPI_UPSTREAM_GO               BIT(6)
 #define IT8XXX2_ESPI_UPSTREAM_INTERRUPT_ENABLE BIT(5)
@@ -1870,6 +1876,9 @@ static int espi_it8xxx2_init(const struct device *dev)
 			DEVICE_DT_INST_GET(0), 0);
 	irq_enable(IT8XXX2_ESPI_VW_IRQ);
 
+	/* Reset PLTRST# virtual wire signal during eSPI reset */
+	vw_reg->VWCTRL2 |= IT8XXX2_ESPI_VW_RESET_PLTRST;
+
 #ifdef CONFIG_ESPI_OOB_CHANNEL
 	espi_it8xxx2_oob_init(dev);
 #endif