diff options
| author | Usha P <usha.p@intel.com> | 2019-07-19 14:29:29 +0530 |
|---|---|---|
| committer | Subrata Banik <subrata.banik@intel.com> | 2019-07-24 03:05:45 +0000 |
| commit | 46445155ea21b0aa9106e12a00b9b1d89887a461 (patch) | |
| tree | 7f6df5d5c2ae4bcea2bbbf4946db94c30b412a89 /src/soc | |
| parent | 47a7b37cbf9d8d5181fe72c132728da51f3385cd (diff) | |
soc/intel/common: Set controller state to active in uart init
Set the controller state to D0 during the uart init sequence, this
ensures the controller is up and active.
One more argument struct device *dev has been added
to uart_lpss_init function for the same.
BUG=b:135941367
TEST=Verify no timeouts seen during UART controller enumeration
sequence in CML and ICL platforms.
Signed-off-by: Usha P <usha.p@intel.com>
Change-Id: I0187267670e1dea3e1d5e83d0b29967724d6063e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34447
Reviewed-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/common/block/uart/uart.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/soc/intel/common/block/uart/uart.c b/src/soc/intel/common/block/uart/uart.c index 9d820ffd7e..82e5df401c 100644 --- a/src/soc/intel/common/block/uart/uart.c +++ b/src/soc/intel/common/block/uart/uart.c @@ -33,8 +33,11 @@ extern const struct uart_gpio_pad_config uart_gpio_pads[]; extern const int uart_max_index; -static void uart_lpss_init(uintptr_t baseaddr) +static void uart_lpss_init(struct device *dev, uintptr_t baseaddr) { + /* Ensure controller is in D0 state */ + lpss_set_power_state(dev, STATE_D0); + /* Take UART out of reset */ lpss_reset_release(baseaddr); @@ -81,7 +84,7 @@ void uart_common_init(struct device *device, uintptr_t baseaddr) /* Enable memory access and bus master */ pci_write_config32(dev, PCI_COMMAND, UART_PCI_ENABLE); - uart_lpss_init(baseaddr); + uart_lpss_init(device, baseaddr); } struct device *uart_get_device(void) @@ -224,7 +227,7 @@ static void uart_common_enable_resources(struct device *dev) base = pci_read_config32(dev, PCI_BASE_ADDRESS_0) & ~0xFFF; if (base) - uart_lpss_init(base); + uart_lpss_init(dev, base); } } |