diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0069-i2c-aspeed-add-SLAVE_ADDR_RECEIVED_PENDING-interrupt.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0069-i2c-aspeed-add-SLAVE_ADDR_RECEIVED_PENDING-interrupt.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0069-i2c-aspeed-add-SLAVE_ADDR_RECEIVED_PENDING-interrupt.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0069-i2c-aspeed-add-SLAVE_ADDR_RECEIVED_PENDING-interrupt.patch new file mode 100644 index 000000000..104279ace --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0069-i2c-aspeed-add-SLAVE_ADDR_RECEIVED_PENDING-interrupt.patch @@ -0,0 +1,50 @@ +From b43bdeb5f3aa297549655e67f0e6a5db5f592e34 Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +Date: Thu, 11 Jul 2019 14:04:39 -0700 +Subject: [PATCH] i2c: aspeed: add SLAVE_ADDR_RECEIVED_PENDING interrupt + handling + +If a peer master sends messages too quickly before it processes +previous slave DMA data handling, this indicator will be set. It's +just a indicator and driver can't recover this case so just ignore +it. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +--- + drivers/i2c/busses/i2c-aspeed.c | 13 +++++++++++++ + 1 file changed, 13 insertions(+) + +diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c +index 830b3d2cabad..a308d5896632 100644 +--- a/drivers/i2c/busses/i2c-aspeed.c ++++ b/drivers/i2c/busses/i2c-aspeed.c +@@ -87,6 +87,7 @@ + * These share bit definitions, so use the same values for the enable & + * status bits. + */ ++#define ASPEED_I2CD_INTR_SLAVE_ADDR_RECEIVED_PENDING BIT(30) + #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) +@@ -468,6 +469,18 @@ static u32 aspeed_i2c_slave_irq(struct aspeed_i2c_bus *bus, u32 irq_status) + dev_dbg(bus->dev, "slave irq status 0x%08x, cmd 0x%08x\n", + irq_status, command); + ++ /* ++ * If a peer master sends messages too quickly before it processes ++ * previous slave DMA data handling, this indicator will be set. It's ++ * just a indicator and driver can't recover this case so just ignore ++ * it. ++ */ ++ if (unlikely(irq_status & ++ ASPEED_I2CD_INTR_SLAVE_ADDR_RECEIVED_PENDING)) { ++ dev_dbg(bus->dev, "A slave addr match interrupt is pending.\n"); ++ irq_handled |= ASPEED_I2CD_INTR_SLAVE_ADDR_RECEIVED_PENDING; ++ } ++ + /* Slave was sent something. */ + if (irq_status & ASPEED_I2CD_INTR_RX_DONE) { + aspeed_i2c_slave_handle_rx_done(bus, irq_status, &value); +-- +2.7.4 + |