Enabling uart on blsp10

I am running linux on a dragonboard820c (yocto).
I am trying to enable a uart on blsp10, I have updated the device tree with the following patch:

Index: kernel-source/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
===================================================================
--- kernel-source.orig/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ kernel-source/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -23,7 +23,7 @@
/ {
    aliases {
            serial0 = &blsp2_uart1;
-              serial1 = &blsp2_uart2;
+              serial1 = &blsp2_uart3;
            serial2 = &blsp1_uart1;
            i2c0    = &blsp1_i2c2;
            i2c1    = &blsp2_i2c1;
@@ -85,13 +85,13 @@
                    pinctrl-1 = <&blsp2_uart1_2pins_sleep>;
            };

-//            serial@75b1000 {
-//                    label = "LS-UART0";
-//                    status = "okay";
-//                    pinctrl-names = "default", "sleep";
-//                    pinctrl-0 = <&blsp2_uart2_4pins_default>;
-//                    pinctrl-1 = <&blsp2_uart2_4pins_sleep>;
-//            };
+              serial@75b2000 {
+                      label = "LS-UART0";
+                      status = "okay";
+                      pinctrl-names = "default", "sleep";
+                      pinctrl-0 = <&blsp2_uart3_2pins_default>;
+                      pinctrl-1 = <&blsp2_uart3_2pins_sleep>;
+              };

            i2c@07577000 {
            /* On Low speed expansion */
Index: kernel-source/arch/arm64/boot/dts/qcom/msm8996-pins.dtsi
===================================================================
--- kernel-source.orig/arch/arm64/boot/dts/qcom/msm8996-pins.dtsi
+++ kernel-source/arch/arm64/boot/dts/qcom/msm8996-pins.dtsi
@@ -265,6 +265,32 @@
            };
    };

+      blsp2_uart3_2pins_default: blsp2_uart3_2pins {
+              pinmux {
+                      function = "blsp_uart10";
+                      pins = "gpio8", "gpio9";
+              };
+
+              pinconf {
+                      pins = "gpio8", "gpio9";
+                      drive-strength = <16>;
+                      bias-disable;
+              };
+      };
+
+      blsp2_uart3_2pins_sleep: blsp2_uart3_2pins_sleep {
+              pinmux {
+                      function = "gpio";
+                      pins = "gpio8", "gpio9";
+              };
+
+              pinconf {
+                      pins = "gpio8", "gpio9";
+                      drive-strength = <2>;
+                      bias-disable;
+              };
+      };
+
    blsp2_spi5_default: blsp2_spi5_default {
            pinmux {
                    function = "blsp_spi12";
Index: kernel-source/arch/arm64/boot/dts/qcom/msm8996.dtsi
===================================================================
--- kernel-source.orig/arch/arm64/boot/dts/qcom/msm8996.dtsi
+++ kernel-source/arch/arm64/boot/dts/qcom/msm8996.dtsi
@@ -787,6 +787,16 @@
                    status = "disabled";
            };

+              blsp2_uart3: serial@75b2000 {
+                      compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
+                      reg = <0x75b2000 0x1000>;
+                      interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
+                      clocks = <&gcc GCC_BLSP2_UART4_APPS_CLK>,
+                               <&gcc GCC_BLSP2_AHB_CLK>;
+                      clock-names = "core", "iface";
+                      status = "disabled";
+              };
+
            blsp2_spi5: spi@075ba000{
                    compatible = "qcom,spi-qup-v2.2.1";
                    reg = <0x075ba000 0x600>;

This seems to enable the port but when I try to boot the kernel it hangs after that port is initialized here is the serial console log:
[ 1.474817] gpio-clk clocks:divclk1: could not find pctldev for node /soc/qcom,spmi@400f000/pmic@0/gpios@c000/clk_div1, deferring probe
[ 1.508847] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 1.513345] SuperH (H)SCI(F) driver initialized
[ 1.514616] msm_serial 7570000.serial: msm_serial: detected port #2
[ 1.514681] msm_serial 7570000.serial: uartclk = 19200000
[ 1.514776] 7570000.serial: ttyMSM2 at MMIO 0x7570000 (irq = 9, base_baud = 1200000) is a MSM
[ 1.515092] serial serial0: tty port ttyMSM2 registered
[ 1.515619] msm_serial 75b0000.serial: msm_serial: detected port #0
[ 1.515688] msm_serial 75b0000.serial: uartclk = 7372800
[ 1.515857] 75b0000.serial: ttyMSM0 at MMIO 0x75b0000 (irq = 12, base_baud = 460800) is a MSM
[ 1.515900] msm_serial: console setup on port #0
[ 2.993581] console [ttyMSM0] enabled
[ 2.999347] msm_serial 75b1000.serial: msm_serial: detected port #1
[ 3.001890] msm_serial 75b1000.serial: uartclk = 19200000
[ 3.007974] 75b1000.serial: ttyMSM1 at MMIO 0x75b1000 (irq = 14, base_baud = 1200000) is a MSM

Format: Log Type - Time(microsec) - Message - Optional Info
Log Type: B - Since Boot(Power On Reset), D - Delta, S - Statistic
S - QC_IMAGE_VERSION_STRING=BOOT.XF.1.0-00301
S - IMAGE_VARIANT_STRING=M8996LAB
S - OEM_IMAGE_VERSION_STRING=crm-ubuntu68
S - Boot Interface: UFS
S - Secure Boot: Off
S - Boot Config @ 0x00076044 = 0x000001c9
S - JTAG ID @ 0x000760f4 = 0x4003e0e1
S - OEM ID @ 0x000760f8 = 0x00000000
S - Serial Number @ 0x00074138 = 0x5373a4d1
S - OEM Config Row 0 @ 0x00074188 = 0x0000000000000000
S - OEM Config Row 1 @ 0x00074190 = 0x0000000000000000
S - Feature Config Row 0 @ 0x000741a0 = 0x0050000010000100
S - Feature Config Row 1 @ 0x000741a8 = 0x00fff00001ffffff
S - Core 0 Frequency, 1228 MHz
B - 0 - PBL, Start
B - 10413 - bootable_media_detect_entry, Start
B - 46012 - bootable_media_detect_success, Start
B - 46016 - elf_loader_entry, Start
B - 47063 - auth_hash_seg_entry, Start
B - 47166 - auth_hash_seg_exit, Start
B - 79138 - elf_segs_hash_verify_entry, Start
B - 81638 - PBL, End
B - 83783 - SBL1, Start
B - 179919 - usb: hs_phy_nondrive_start
B - 180285 - usb: PLL lock success - 0x3
B - 183274 - usb: hs_phy_nondrive_finish
B - 187392 - boot_flash_init, Start
D - 30 - boot_flash_init, Delta
B - 194529 - sbl1_ddr_set_default_params, Start
D - 0 - sbl1_ddr_set_default_params, Delta
B - 202520 - boot_config_data_table_init, Start
D - 191387 - boot_config_data_table_init, Delta - (60 Bytes)
B - 398421 - CDT Version:3,Platform ID:24,Major ID:1,Minor ID:0,Subtype:0
B - 403149 - Image Load, Start
D - 22265 - PMIC Image Loaded, Delta - (37272 Bytes)
B - 425444 - pm_device_init, Start
B - 431209 - PON REASON:PM0:0x200020021 PM1:0x200020021
B - 467626 - PM_SET_VAL:Skip
D - 40016 - pm_device_init, Delta
B - 469547 - pm_driver_init, Start
D - 2928 - pm_driver_init, Delta
B - 476135 - pm_sbl_chg_init, Start
D - 91 - pm_sbl_chg_init, Delta
B - 482906 - vsense_init, Start
D - 0 - vsense_init, Delta
B - 490775 - Pre_DDR_clock_init, Start
D - 366 - Pre_DDR_clock_init, Delta
B - 496509 - ddr_initialize_device, Start
B - 500200 - 8996 v3.x detected, Max frequency = 1.8 GHz
B - 507794 - ddr_initialize_device, Delta
B - 509807 - Basic DDR tests done
B - 2070523 - clock_init, Start
D - 274 - clock_init, Delta
B - 2072536 - Image Load, Start
D - 6222 - QSEE Dev Config Image Loaded, Delta - (46008 Bytes)
B - 2079124 - Image Load, Start
D - 5551 - APDP Image Loaded, Delta - (0 Bytes)
B - 2108892 - usb: fedl, vbus_low
B - 2108953 - Image Load, Start
D - 10766 - XBLRamDump Image Loaded, Delta - (342782 Bytes)
B - 2174314 - usb: init start
B - 2176144 - usb: PLL lock success , 0x2
B - 2195786 - usb: FULL , 0x900e