MLK-21013 ARM64: dts: imx8qm: passthrough lvds pwm

Passthrough lvds pwm, otherwise dom0 will panic when reboot if
domu started and shutdown, because LVDS_1_PWM_0 is assigned
to domu and when domu shutdown, the resource will be powered
off, however dom0 still think it is powered on.

since lvds1_pwm is expected for domu, so let's passthrough it.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Flynn xu <flynn.xu@nxp.com>
(cherry picked from commit abb243aba12a6649fad8114e298ff075b0a8399d)
(cherry picked from commit 9644178aeb4fc2a5b04824e7f6fb9cd9b5f7477f)

diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-dom0.dts b/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-dom0.dts
index 2b3eb60..d23e7d0 100644 (file)
--- a/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-dom0.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-dom0.dts
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 NXP
+ * Copyright 2018-2019 NXP
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -257,6 +257,9 @@
                                SC_P_ESAI0_TX3_RX2
                                SC_P_ESAI0_TX4_RX1
                                SC_P_ESAI0_TX5_RX0
+
+                               /* lvds pwm */
+                               SC_P_LVDS1_GPIO00
                                >;
 
                        gpios = <&gpio1 13 GPIO_ACTIVE_LOW>,
@@ -920,3 +923,7 @@
 &aud_rec_clk1_lpcg {
        xen,passthrough;
 };
+
+&lvds1_pwm {
+       xen,passthrough;
+};

diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-domu.dts b/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-domu.dts
index 702c8c2..c4c1b73 100644 (file)
--- a/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-domu.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-domu.dts
@@ -216,6 +216,24 @@
                clock-names = "apb_pclk";
        };
 
+       lvds_backlight1: lvds_backlight@1 {
+               compatible = "pwm-backlight";
+               pwms = <&lvds1_pwm 0 100000 0>;
+
+               brightness-levels = < 0  1  2  3  4  5  6  7  8  9
+                                    10 11 12 13 14 15 16 17 18 19
+                                    20 21 22 23 24 25 26 27 28 29
+                                    30 31 32 33 34 35 36 37 38 39
+                                    40 41 42 43 44 45 46 47 48 49
+                                    50 51 52 53 54 55 56 57 58 59
+                                    60 61 62 63 64 65 66 67 68 69
+                                    70 71 72 73 74 75 76 77 78 79
+                                    80 81 82 83 84 85 86 87 88 89
+                                    90 91 92 93 94 95 96 97 98 99
+                                   100>;
+               default-brightness-level = <80>;
+       };
+
        passthrough {
                compatible = "simple-bus";
                ranges;
@@ -666,7 +684,6 @@
 /delete-node/ &lvds_region1;
 /delete-node/ &ldb1_phy;
 /delete-node/ &ldb1;
-/delete-node/ &lvds1_pwm;
 /*/delete-node/ &camera;*/
 /delete-node/ &adc0;
 /delete-node/ &adc1;
@@ -984,6 +1001,12 @@
                        >;
                };
 
+               pinctrl_lvds1_pwm0: lvds1pwm0grp {
+                       fsl,pins = <
+                               SC_P_LVDS1_GPIO00_LVDS1_PWM0_OUT        0x00000020
+                       >;
+               };
+
                pinctrl_lpuart1: lpuart1grp {
                        fsl,pins = <
                                SC_P_UART1_RX_DMA_UART1_RX              0x06000020
@@ -1239,3 +1262,9 @@
                };
        };
 };
+
+&lvds1_pwm {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_lvds1_pwm0>;
+       status = "okay";
+};