diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/common/block/gspi/gspi.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/gspi/gspi.c b/src/soc/intel/common/block/gspi/gspi.c index 17532bf6db..beb12fb231 100644 --- a/src/soc/intel/common/block/gspi/gspi.c +++ b/src/soc/intel/common/block/gspi/gspi.c @@ -23,6 +23,7 @@ #include <device/pci_ops.h> #include <intelblocks/chip.h> #include <intelblocks/gspi.h> +#include <intelblocks/lpss.h> #include <intelblocks/spi.h> #include <soc/iomap.h> #include <soc/pci_devs.h> @@ -446,8 +447,19 @@ static uint32_t gspi_get_clk_div(unsigned int gspi_bus) static int gspi_ctrlr_setup(const struct spi_slave *dev) { struct spi_cfg cfg; + int devfn; uint32_t cs_ctrl, sscr0, sscr1, clocks, sitf, sirf, pol; struct gspi_ctrlr_params params, *p = ¶ms; + const struct device *device; + + devfn = gspi_soc_bus_to_devfn(dev->bus); + if (devfn < 0) { + printk(BIOS_ERR, "%s: No GSPI controller found on SPI bus %u.\n", + __func__, dev->bus); + return -1; + } + + device = pcidev_path_on_root(devfn); /* Only chip select 0 is supported. */ if (dev->cs != 0) { @@ -466,6 +478,9 @@ static int gspi_ctrlr_setup(const struct spi_slave *dev) return -1; } + /* Ensure controller is in D0 state */ + lpss_set_power_state(device, STATE_D0); + /* Take controller out of reset, keeping DMA in reset. */ gspi_write_mmio_reg(p, RESETS, CTRLR_ACTIVE | DMA_RESET); |