From patchwork Mon Feb 3 13:46:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lokesh Vutla X-Patchwork-Id: 235819 List-Id: U-Boot discussion From: lokeshvutla at ti.com (Lokesh Vutla) Date: Mon, 3 Feb 2020 19:16:53 +0530 Subject: [PATCH 1/2] arm: dts: k3-j721e-r5-common-proc-board: Disable power-domains for mcu uart In-Reply-To: <20200203134654.17832-1-lokeshvutla@ti.com> References: <20200203134654.17832-1-lokeshvutla@ti.com> Message-ID: <20200203134654.17832-2-lokeshvutla@ti.com> mcu uart will be used during uart boot for loading sysfw.itb. Since sysfw is not yet available during uart load, power-domain cannot be enabled. We need to rely on ROM for doing that, so disable power-domains and clocks for mcu uart. Also fix the mcu uart frequency. Signed-off-by: Lokesh Vutla --- arch/arm/dts/k3-j721e-r5-common-proc-board.dts | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts index 28a355d49c..64c31e23ca 100644 --- a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts +++ b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts @@ -143,9 +143,13 @@ }; &mcu_uart0 { + /delete-property/ power-domains; + /delete-property/ clocks; + /delete-property/ clock-names; pinctrl-names = "default"; pinctrl-0 = <&mcu_uart0_pins_default>; status = "okay"; + clock-frequency = <48000000>; }; &main_uart0 {