Thread (18 messages) 18 messages, 3 authors, 2020-03-17

Re: [PATCHv3 2/5] ARM: dts: exynos: Add missing usbdrd3 suspend clk

From: Anand Moon <hidden>
Date: 2020-03-15 02:42:51
Also in: linux-clk, linux-devicetree, linux-samsung-soc, linux-usb, lkml

Hi Krzysztof,

On Wed, 11 Mar 2020 at 01:19, Anand Moon [off-list ref] wrote:
Add new compatible strings for USBDRD3 for adding missing
suspend clk, exynos5422 usbdrd3 support two clk USBD300 and
SCLK_USBD300, so add missing suspemd_clk for Exynos542x DWC3 nodes.

Signed-off-by: Anand Moon <redacted>
My assumption based on the FSYS clock source diagram below was bit wrong.
[0] https://imgur.com/gallery/zAiBoyh

And again re-looking into the driver source code, it turn out their
are *6 clock*
Here is the correct mapping as per the Exynos5420 clock driver.

USB-(phy@12100000)
|___________________CLK_SCLK_USBD300
|___________________CLK_SCLK_USBPHY300

USB-(phy@12500000)
|___________________CLK_SCLK_USBD301
|___________________CLK_SCLK_USBPHY301

USB-(dwc3@12000000)
|___________________CLK_USBD300
USB-(dwc3@12400000)
|___________________CLK_USBD301

Note: As per Exynos 5422 user manual, There are some more USB CLK
configuration missing in GATE_IP_FSYS. So we could enable another dwc3 clk,
If needed I would like too add this missing clk code and enable this
clk for dwc3 driver.

For some reason we already use CLK_USBD300 and CLK_USBD301
for PHY nodes, which lead to this confusion. So we need to update PHY clock
CLK_USBD300 with CLK_SCLK_USBD300 and clock CLK_USBD301 with CLK_SCLK_USBD301.

Please share your thought on linking PHY nodes above and add new DWC3 clock
and enable this clock.

-Anand
quoted hunk ↗ jump to hunk
---
fix the commit message
---
 arch/arm/boot/dts/exynos5410.dtsi | 8 ++++----
 arch/arm/boot/dts/exynos5420.dtsi | 8 ++++----
 arch/arm/boot/dts/exynos54xx.dtsi | 4 ++--
 3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/arm/boot/dts/exynos5410.dtsi b/arch/arm/boot/dts/exynos5410.dtsi
index 2eab80bf5f3a..19845dcd528f 100644
--- a/arch/arm/boot/dts/exynos5410.dtsi
+++ b/arch/arm/boot/dts/exynos5410.dtsi
@@ -396,8 +396,8 @@ &trng {
 };

 &usbdrd3_0 {
-       clocks = <&clock CLK_USBD300>;
-       clock-names = "usbdrd30";
+       clocks = <&clock CLK_USBD300>, <&clock CLK_SCLK_USBD300>;
+       clock-names = "usbdrd30", "usbdrd30_susp_clk";
 };

 &usbdrd_phy0 {
@@ -407,8 +407,8 @@ &usbdrd_phy0 {
 };

 &usbdrd3_1 {
-       clocks = <&clock CLK_USBD301>;
-       clock-names = "usbdrd30";
+       clocks = <&clock CLK_USBD301>, <&clock CLK_SCLK_USBD301>;
+       clock-names = "usbdrd30", "usbdrd30_susp_clk";
 };

 &usbdrd_dwc3_1 {
diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index b672080e7469..bd505256a223 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -1372,8 +1372,8 @@ &trng {
 };

 &usbdrd3_0 {
-       clocks = <&clock CLK_USBD300>;
-       clock-names = "usbdrd30";
+       clocks = <&clock CLK_USBD300>, <&clock CLK_SCLK_USBD300>;
+       clock-names = "usbdrd30", "usbdrd30_susp_clk";
 };

 &usbdrd_phy0 {
@@ -1383,8 +1383,8 @@ &usbdrd_phy0 {
 };

 &usbdrd3_1 {
-       clocks = <&clock CLK_USBD301>;
-       clock-names = "usbdrd30";
+       clocks = <&clock CLK_USBD301>, <&clock CLK_SCLK_USBD301>;
+       clock-names = "usbdrd30", "usbdrd30_susp_clk";
 };

 &usbdrd_dwc3_1 {
diff --git a/arch/arm/boot/dts/exynos54xx.dtsi b/arch/arm/boot/dts/exynos54xx.dtsi
index 8aa5117e58ce..0aac6255de5d 100644
--- a/arch/arm/boot/dts/exynos54xx.dtsi
+++ b/arch/arm/boot/dts/exynos54xx.dtsi
@@ -143,7 +143,7 @@ hsi2c_7: i2c@12cd0000 {
                };

                usbdrd3_0: usb3-0 {
-                       compatible = "samsung,exynos5250-dwusb3";
+                       compatible = "samsung,exynos5420-dwusb3";
                        #address-cells = <1>;
                        #size-cells = <1>;
                        ranges;
@@ -165,7 +165,7 @@ usbdrd_phy0: phy@12100000 {
                };

                usbdrd3_1: usb3-1 {
-                       compatible = "samsung,exynos5250-dwusb3";
+                       compatible = "samsung,exynos5420-dwusb3";
                        #address-cells = <1>;
                        #size-cells = <1>;
                        ranges;
--
2.25.1
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