diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0080-i2c-aspeed-filter-garbage-interrupts-out.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0080-i2c-aspeed-filter-garbage-interrupts-out.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0080-i2c-aspeed-filter-garbage-interrupts-out.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0080-i2c-aspeed-filter-garbage-interrupts-out.patch new file mode 100644 index 000000000..0e32615d5 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0080-i2c-aspeed-filter-garbage-interrupts-out.patch @@ -0,0 +1,64 @@ +From 6825259fc0ac015c6544f6070ceaf9cc263c1853 Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +Date: Fri, 8 Nov 2019 15:57:27 -0800 +Subject: [PATCH] i2c: aspeed: filter garbage interrupts out + +AST2600 makes a garbage interrupt which is decribed as 'reserved' +in datasheet so filter them out. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +--- + drivers/i2c/busses/i2c-aspeed.c | 19 +++++++++++++++++++ + 1 file changed, 19 insertions(+) + +diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c +index 62b803e15ce2..e7cba33c0c87 100644 +--- a/drivers/i2c/busses/i2c-aspeed.c ++++ b/drivers/i2c/busses/i2c-aspeed.c +@@ -87,7 +87,11 @@ + * These share bit definitions, so use the same values for the enable & + * status bits. + */ ++#if defined(CONFIG_MACH_ASPEED_G6) ++#define ASPEED_I2CD_INTR_SLAVE_ADDR_RECEIVED_PENDING BIT(29) ++#else + #define ASPEED_I2CD_INTR_SLAVE_ADDR_RECEIVED_PENDING BIT(30) ++#endif + #define ASPEED_I2CD_INTR_SLAVE_INACTIVE_TIMEOUT BIT(15) + #define ASPEED_I2CD_INTR_SDA_DL_TIMEOUT BIT(14) + #define ASPEED_I2CD_INTR_BUS_RECOVER_DONE BIT(13) +@@ -118,6 +122,11 @@ + ASPEED_I2CD_INTR_RX_DONE | \ + ASPEED_I2CD_INTR_TX_NAK | \ + ASPEED_I2CD_INTR_TX_ACK) ++#define ASPEED_I2CD_INTR_STATUS_MASK \ ++ (ASPEED_I2CD_INTR_SLAVE_ADDR_RECEIVED_PENDING | \ ++ ASPEED_I2CD_INTR_GCALL_ADDR | \ ++ ASPEED_I2CD_INTR_SLAVE_MATCH | \ ++ ASPEED_I2CD_INTR_ALL) + + /* 0x14 : I2CD Command/Status Register */ + #define ASPEED_I2CD_SCL_LINE_STS BIT(18) +@@ -1018,9 +1027,19 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id) + + spin_lock(&bus->lock); + irq_received = readl(bus->base + ASPEED_I2C_INTR_STS_REG); ++ if (!irq_received) { ++ spin_unlock(&bus->lock); ++ return IRQ_NONE; ++ } ++ + /* Ack all interrupts except for Rx done */ + writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE, + bus->base + ASPEED_I2C_INTR_STS_REG); ++ /* ++ * AST2600 makes a garbage interrupt which is decribed as 'reserved' ++ * in datasheet so filter them out. ++ */ ++ irq_received &= ASPEED_I2CD_INTR_STATUS_MASK; + irq_remaining = irq_received; + + #if IS_ENABLED(CONFIG_I2C_SLAVE) +-- +2.7.4 + |