diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/aoac.c')
-rw-r--r-- | src/soc/amd/stoneyridge/aoac.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/aoac.c b/src/soc/amd/stoneyridge/aoac.c new file mode 100644 index 0000000000..7c1d12ddc1 --- /dev/null +++ b/src/soc/amd/stoneyridge/aoac.c @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <amdblocks/aoac.h> +#include <delay.h> +#include <soc/aoac_defs.h> +#include <soc/southbridge.h> +#include <types.h> + +/* + * Table of devices that need their AOAC registers enabled and waited + * upon (usually about .55 milliseconds). Instead of individual delays + * waiting for each device to become available, a single delay will be + * executed. + */ +static const unsigned int aoac_devs[] = { + FCH_AOAC_DEV_UART0 + CONFIG_UART_FOR_CONSOLE * 2, + FCH_AOAC_DEV_AMBA, + FCH_AOAC_DEV_I2C0, + FCH_AOAC_DEV_I2C1, + FCH_AOAC_DEV_I2C2, + FCH_AOAC_DEV_I2C3, +}; + +void enable_aoac_devices(void) +{ + bool status; + int i; + + for (i = 0; i < ARRAY_SIZE(aoac_devs); i++) + power_on_aoac_device(aoac_devs[i]); + + /* Wait for AOAC devices to indicate power and clock OK */ + do { + udelay(100); + status = true; + for (i = 0; i < ARRAY_SIZE(aoac_devs); i++) + status &= is_aoac_device_enabled(aoac_devs[i]); + } while (!status); +} |