arm64: dts: qcom: db820c: Add vdd_gfx and tie it into mmcc

Add the SPMI regulator node in the PMI8994, use it to give us VDD_GX
at a fixed max nominal voltage for the db820c and specify this as supply
for the MMSS GPU_GX GDSC.

With the introduction of CPR support the range for VDD_GX should be
expanded.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Link: https://lore.kernel.org/r/20200417070044.1376212-4-bjorn.andersson@linaro.org
[bjorn: Split between pmi8994 and db820c, changed voltage, rewrote commit message]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
index ecdfc15..a5abd3d 100644 (file)
--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -241,6 +241,10 @@
        status = "okay";
 };
 
+&mmcc {
+       vdd-gfx-supply = <&vdd_gfx>;
+};
+
 &msmgpio {
        gpio-line-names =
                "[SPI0_DOUT]", /* GPIO_0, BLSP1_SPI_MOSI, LSEC pin 14 */
@@ -678,6 +682,15 @@
        };
 };
 
+&pmi8994_spmi_regulators {
+       vdd_gfx: s2@1700 {
+               reg = <0x1700 0x100>;
+               regulator-name = "VDD_GFX";
+               regulator-min-microvolt = <980000>;
+               regulator-max-microvolt = <980000>;
+       };
+};
+
 &rpm_requests {
        pm8994-regulators {
                compatible = "qcom,rpm-pm8994-regulators";

diff --git a/arch/arm64/boot/dts/qcom/pmi8994.dtsi b/arch/arm64/boot/dts/qcom/pmi8994.dtsi
index 21e0521..e5ed28a 100644 (file)
--- a/arch/arm64/boot/dts/qcom/pmi8994.dtsi
+++ b/arch/arm64/boot/dts/qcom/pmi8994.dtsi
@@ -26,5 +26,11 @@
                reg = <0x3 SPMI_USID>;
                #address-cells = <1>;
                #size-cells = <0>;
+
+               pmi8994_spmi_regulators: regulators {
+                       compatible = "qcom,pmi8994-regulators";
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+               };
        };
 };