platform: msm_shared: Update tune2 parameters from fuse
Tune2 phy configuration varies based on the msm, the value is stored
in fuse for each msm. Read the value in efuse and update the tune2
value.
Change-Id: I6069e633fb8469fafaaf393fb2b0b46007d19011
diff --git a/platform/msm_shared/qusb2_phy.c b/platform/msm_shared/qusb2_phy.c
index dfa4776..fab6e09 100644
--- a/platform/msm_shared/qusb2_phy.c
+++ b/platform/msm_shared/qusb2_phy.c
@@ -46,6 +46,8 @@
void qusb2_phy_reset(void)
{
uint32_t val;
+ /* Default tune value */
+ uint8_t tune2 = 0xB3;
/* Block Reset */
val = readl(GCC_QUSB2_PHY_BCR) | BIT(0);
@@ -59,7 +61,18 @@
if (platform_is_msm8996())
{
writel(0xF8, QUSB2PHY_PORT_TUNE1);
- writel(0x83, QUSB2PHY_PORT_TUNE2);
+ /* Upper nibble of tune2 register should be updated based on the fuse value.
+ * Read the bits 21..24 from fuse and update the upper nibble with this value
+ */
+#if QFPROM_CORR_CALIB_ROW12_MSB
+ uint8_t fuse_val = (readl(QFPROM_CORR_CALIB_ROW12_MSB) & 0x1E00000) >> 21;
+ /* If fuse value is non zero then update the upper nibble with the fuse value
+ * otherwise use the default value
+ */
+ if (fuse_val)
+ tune2 = (tune2 & 0x0f) | (fuse_val << 4);
+#endif
+ writel(tune2, QUSB2PHY_PORT_TUNE2);
writel(0x93, QUSB2PHY_PORT_TUNE3);
writel(0xC0, QUSB2PHY_PORT_TUNE4);
writel(0x30, QUSB2PHY_PLL_TUNE);