On 2/11/20 3:53 PM, Paul Cercueil wrote:

The devicetree ABI was broken on purpose by commit 6d532143c915 ("watchdog: jz4740: Use regmap provided by TCU driver"), and commit 1d9c30745455 ("watchdog: jz4740: Use WDT clock provided by TCU driver"). The commit message of the latter explains why the ABI was broken.

However, the current devicetree files were not updated to the new ABI described in Documentation/devicetree/bindings/timer/ingenic,tcu.txt, so the watchdog driver would not probe.

Fix this problem by updating the watchdog nodes to comply with the new ABI.

Fixes: 6d532143c915 ("watchdog: jz4740: Use regmap provided by TCU driver")

Signed-off-by: Paul Cercueil paul@crapouillou.net Cc: stable@vger.kernel.org

---

arch/mips/boot/dts/ingenic/jz4740.dtsi | 17 +++++++++-------- arch/mips/boot/dts/ingenic/jz4780.dtsi | 17 +++++++++-------- 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/arch/mips/boot/dts/ingenic/jz4740.dtsi b/arch/mips/boot/dts/ingenic/jz4740.dtsi index 5accda2767be..a3301bab9231 100644 --- a/arch/mips/boot/dts/ingenic/jz4740.dtsi +++ b/arch/mips/boot/dts/ingenic/jz4740.dtsi @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include <dt-bindings/clock/jz4740-cgu.h> +#include <dt-bindings/clock/ingenic,tcu.h> / { #address-cells = <1>; @@ -45,14 +46,6 @@ cgu: jz4740-cgu@10000000 { #clock-cells = <1>; };

• watchdog: watchdog@10002000 {

• compatible = "ingenic,jz4740-watchdog";
  

• reg = <0x10002000 0x10>;
  

• clocks = <&cgu JZ4740_CLK_RTC>;
  

• clock-names = "rtc";
  

• };
• tcu: timer@10002000 { compatible = "ingenic,jz4740-tcu", "simple-mfd"; reg = <0x10002000 0x1000>;

@@ -73,6 +66,14 @@ &cgu JZ4740_CLK_PCLK interrupt-parent = <&intc>; interrupts = <23 22 21>;

• watchdog: watchdog@0 {
  

• 	compatible = "ingenic,jz4740-watchdog";
  

• 	reg = <0x0 0xc>;
  

Now the WDT_TCSR register is directly managed by the CPU, OK.

Reviewed-by: Philippe Mathieu-Daudé f4bug@amsat.org

• 	clocks = <&tcu TCU_CLK_WDT>;
  

• 	clock-names = "wdt";
  

• };
  

  };

rtc_dev: rtc@10003000 { diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi b/arch/mips/boot/dts/ingenic/jz4780.dtsi index f928329b034b..bb89653d16a3 100644 --- a/arch/mips/boot/dts/ingenic/jz4780.dtsi +++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include <dt-bindings/clock/jz4780-cgu.h> +#include <dt-bindings/clock/ingenic,tcu.h> #include <dt-bindings/dma/jz4780-dma.h> / { @@ -67,6 +68,14 @@ &cgu JZ4780_CLK_EXCLK interrupt-parent = <&intc>; interrupts = <27 26 25>;

• watchdog: watchdog@0 {
  

• 	compatible = "ingenic,jz4780-watchdog";
  

• 	reg = <0x0 0xc>;
  

• 	clocks = <&tcu TCU_CLK_WDT>;
  

• 	clock-names = "wdt";
  

• };
  

  };

rtc_dev: rtc@10003000 { @@ -348,14 +357,6 @@ i2c4: i2c@10054000 { status = "disabled"; };

• watchdog: watchdog@10002000 {

• compatible = "ingenic,jz4780-watchdog";
  

• reg = <0x10002000 0x10>;
  

• clocks = <&cgu JZ4780_CLK_RTCLK>;
  

• clock-names = "rtc";
  

• };
• nemc: nemc@13410000 { compatible = "ingenic,jz4780-nemc"; reg = <0x13410000 0x10000>;