diff options
| author | Meera Ravindranath <meera.ravindranath@intel.com> | 2022-07-21 20:45:32 +0530 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-08-03 12:45:20 +0000 |
| commit | d307d0d2fb69f960ba300e27937105135f1a1a9c (patch) | |
| tree | 1feca40afdb7c6ab2c6d148ddd24bfc807012dad /src/soc/intel/alderlake/Kconfig | |
| parent | 3046948867ea060d59d7cad31c0718e3dc12c698 (diff) | |
soc/soc/intel: Add UFS device with ref-clk-freq property
UFS storage devices require the bRefClkFreq attribute to be set to
operate correctly in high speed mode. The correct value is determined by
what the SoC / board supports. For the ADL UFS controller, it is
19.2 MHz.
a) Introduce a new ACPI property "ref-clk-freq".
b) Add support to configure this property using an SoC Kconfig.
Kernel patch:
https://web.archive.org/web/20220801060732/https://lore.kernel.org/all/
20220715210230.1.I365d113d275117dee8fd055ce4fc7e6aebd0bce9@changeid/
BUG=b:238262674
TEST=Build,boot Nirwen and dump SSDT entries and check that the kernel
correctly parses ref-clk-freq as 19.2 MHz.
Scope (\_SB.PCI0)
{
Device (UFS)
{
Name (_ADR, 0x0000000000120007) // _ADR: Address
Name (_DDN, "UFS Controller") // _DDN: DOS Device Name
Name (_DSD, Package (0x02) // _DSD: Device-Specific Data
{
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301")
/* Device Properties for _DSD */,
Package (0x01)
{
Package (0x02)
{
"ref-clk-freq",
0x0124F800
}
}
})
}
}
Signed-off-by: Meera Ravindranath <meera.ravindranath@intel.com>
Signed-off-by: Reka Norman <rekanorman@chromium.org>
Change-Id: I80c338a8a61f161b0feb6c5a3ca00cf5e0cfb36c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66051
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Diffstat (limited to 'src/soc/intel/alderlake/Kconfig')
| -rw-r--r-- | src/soc/intel/alderlake/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig index af1a04934c..5a6df8d758 100644 --- a/src/soc/intel/alderlake/Kconfig +++ b/src/soc/intel/alderlake/Kconfig @@ -295,6 +295,10 @@ config SOC_INTEL_COMMON_BLOCK_GSPI_CLOCK_MHZ config CPU_XTAL_HZ default 38400000 +config SOC_INTEL_UFS_CLK_FREQ_HZ + int + default 19200000 + config DRIVERS_I2C_DESIGNWARE_CLOCK_MHZ int default 133 |