[PATCH 19/21] aspeed/i2c: Enable SLAVE_ADDR_RX_MATCH always

[Cédric Le Goater]

There is no 'slave match interrupt' enable bit in the Interrupt
Control Register. Consider it is always enabled and extend the mask
value 'bus->regs[intr_ctrl_reg]' with the SLAVE_ADDR_RX_MATCH bit when
the interrupt is raised.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/i2c/aspeed_i2c.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index 59245079002b..f30098bebbab 100644
--- a/hw/i2c/aspeed_i2c.c
+++ b/hw/i2c/aspeed_i2c.c
@@ -32,11 +32,16 @@
 #include "hw/registerfields.h"
 #include "trace.h"
 
+/* Enable SLAVE_ADDR_RX_MATCH always */
+#define R_I2CD_INTR_STS_ALWAYS_ENABLE  R_I2CD_INTR_STS_SLAVE_ADDR_RX_MATCH_MASK
+
 static inline void aspeed_i2c_bus_raise_interrupt(AspeedI2CBus *bus)
 {
     AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
     uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
     uint32_t intr_ctrl_reg = aspeed_i2c_bus_intr_ctrl_offset(bus);
+    uint32_t intr_ctrl_mask = bus->regs[intr_ctrl_reg] |
+        R_I2CD_INTR_STS_ALWAYS_ENABLE;
     bool raise_irq;
 
     if (trace_event_get_state_backends(TRACE_ASPEED_I2C_BUS_RAISE_INTERRUPT)) {
@@ -60,11 +65,11 @@ static inline void 
aspeed_i2c_bus_raise_interrupt(AspeedI2CBus *bus)
            trace_aspeed_i2c_bus_raise_interrupt(bus->regs[reg_intr_sts], buf);
     }
 
-    raise_irq = bus->regs[reg_intr_sts] & bus->regs[intr_ctrl_reg];
+    raise_irq = bus->regs[reg_intr_sts] & intr_ctrl_mask ;
 
     /* In packet mode we don't mask off INTR_STS */
     if (!aspeed_i2c_bus_pkt_mode_en(bus)) {
-        bus->regs[reg_intr_sts] &= bus->regs[intr_ctrl_reg];
+        bus->regs[reg_intr_sts] &= intr_ctrl_mask;
     }
 
     if (raise_irq) {
-- 
2.35.3