diff options
| author | Zheng Bao <fishbaozi@gmail.com> | 2021-03-16 16:13:56 +0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2021-03-22 03:44:30 +0000 |
| commit | 7b13e4ef2a874aa28ec479824f5ef0e125b338bc (patch) | |
| tree | ee085eca84de7737bedb12cf02120a34de67bbc2 /src | |
| parent | b0f00ed4268573269c5f2085da1c92566768ece3 (diff) | |
soc/amd/cezanne: Initialize I2C
Add I2C initialization in romstage and ramstage.
TEST=To test the I2C connection on Majolica, which doesn't have SPD
connection, call the function below after i2c_soc_init is called.
i2c_read_bytes(2, 0x4d, addr, data, 1);/* Read out 1 byte one time */
It can get the register values of TMP432B.
Or
/* Override EC port in ec.h */
#define EC_DATA 0x662
#define EC_SC 0x666
ec_write(0xA9, 0x40);
i2c_read_bytes(1, 0x10, addr, data, 2);/* Read out 2 bytes one time */
It can get the register values of CM32181A3OP(ALS).
Change-Id: I3a2a1494b44b68e8d8204fba0c90e769e0256e6f
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51029
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/amd/cezanne/Kconfig | 5 | ||||
| -rw-r--r-- | src/soc/amd/cezanne/early_fch.c | 1 | ||||
| -rw-r--r-- | src/soc/amd/cezanne/fch.c | 3 |
3 files changed, 9 insertions, 0 deletions
diff --git a/src/soc/amd/cezanne/Kconfig b/src/soc/amd/cezanne/Kconfig index 119889db36..7a69cc7f5e 100644 --- a/src/soc/amd/cezanne/Kconfig +++ b/src/soc/amd/cezanne/Kconfig @@ -16,6 +16,7 @@ config SOC_SPECIFIC_OPTIONS select ARCH_RAMSTAGE_X86_32 select BOOT_DEVICE_SUPPORTS_WRITES if BOOT_DEVICE_SPI_FLASH select DRIVERS_USB_ACPI + select DRIVERS_I2C_DESIGNWARE select DRIVERS_USB_PCI_XHCI select FSP_COMPRESS_FSP_M_LZMA select FSP_COMPRESS_FSP_S_LZMA @@ -189,6 +190,10 @@ config SMM_MODULE_STACK_SIZE hex default 0x800 +config DRIVERS_I2C_DESIGNWARE_CLOCK_MHZ + int + default 150 + menu "PSP Configuration Options" config AMD_FWM_POSITION_INDEX diff --git a/src/soc/amd/cezanne/early_fch.c b/src/soc/amd/cezanne/early_fch.c index 0bab87ff8a..b00f49dd97 100644 --- a/src/soc/amd/cezanne/early_fch.c +++ b/src/soc/amd/cezanne/early_fch.c @@ -58,6 +58,7 @@ void fch_pre_init(void) void fch_early_init(void) { fch_print_pmxc0_status(); + i2c_soc_early_init(); if (CONFIG(SOC_AMD_COMMON_BLOCK_USE_ESPI)) { espi_setup(); diff --git a/src/soc/amd/cezanne/fch.c b/src/soc/amd/cezanne/fch.c index a3006de259..ce7ff6d315 100644 --- a/src/soc/amd/cezanne/fch.c +++ b/src/soc/amd/cezanne/fch.c @@ -6,8 +6,10 @@ #include <assert.h> #include <bootstate.h> #include <cpu/x86/smm.h> +#include <amdblocks/i2c.h> #include <soc/amd_pci_int_defs.h> #include <soc/iomap.h> +#include <soc/i2c.h> #include <soc/smi.h> #include <soc/southbridge.h> @@ -111,6 +113,7 @@ static void fch_init_acpi_ports(void) void fch_init(void *chip_info) { + i2c_soc_init(); fch_init_acpi_ports(); } |