soc/intel/skylake: Move pmc_set_disb() to pmutil.c

To drop bad __SIMPLE_DEVICE__ usage and for consistency with newer
platforms, move pmc_set_disb() to pmutil.c and adapt it accordingly.

Change-Id: I1a137b5b3120c350a04273567b9cb18c9a42a543
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52463
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/soc/intel/skylake/pmutil.c b/src/soc/intel/skylake/pmutil.c
index 115a9e58ec..35862c278b 100644
--- a/src/soc/intel/skylake/pmutil.c
+++ b/src/soc/intel/skylake/pmutil.c
@@ -113,6 +113,20 @@ const char *const *soc_std_gpe_sts_array(size_t *gpe_arr)
 	return gpe_sts_bits;
 }
 
+void pmc_set_disb(void)
+{
+	/* Set the DISB after DRAM init */
+	u32 disb_val;
+	const pci_devfn_t dev = PCH_DEV_PMC;
+
+	disb_val = pci_read_config32(dev, GEN_PMCON_A);
+	disb_val |= DISB;
+
+	/* Don't clear bits that are write-1-to-clear */
+	disb_val &= ~(GBL_RST_STS | MS4V);
+	pci_write_config32(dev, GEN_PMCON_A, disb_val);
+}
+
 uint8_t *pmc_mmio_regs(void)
 {
 	uint32_t reg32;