diff options
| author | Takeshi Kihara <takeshi.kihara.df@renesas.com> | 2018-08-30 17:56:35 +0300 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2018-09-13 10:47:56 +0300 |
| commit | 103db9b539567073de2200a8a0a725646610865d (patch) | |
| tree | c39fa1ba54d6bd8f5e4226e31d8857e1015091cc /arch/arm64/boot/dts/renesas/r8a77990.dtsi | |
| parent | 83e7d2ec0d7bd57666c6f8fd210255e0ec155c38 (diff) | |
| download | linux-103db9b539567073de2200a8a0a725646610865d.tar.xz | |
arm64: dts: renesas: r8a77990: Add BRG support to SCIF2
Add the device node for the external SCIF_CLK, and describe the clock
inputs for the Baud Rate Generator for External Clock (BRG) for SCIF2,
which can increase serial clock accuracy.
The presence of the SCIF_CLK crystal and its clock frequency depend on
the actual board.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[geert: Enhance patch description]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm64/boot/dts/renesas/r8a77990.dtsi')
| -rw-r--r-- | arch/arm64/boot/dts/renesas/r8a77990.dtsi | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm64/boot/dts/renesas/r8a77990.dtsi b/arch/arm64/boot/dts/renesas/r8a77990.dtsi index e2c2d1480a68..6198768264be 100644 --- a/arch/arm64/boot/dts/renesas/r8a77990.dtsi +++ b/arch/arm64/boot/dts/renesas/r8a77990.dtsi @@ -63,6 +63,13 @@ method = "smc"; }; + /* External SCIF clock - to be overridden by boards that provide it */ + scif_clk: scif { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <0>; + }; + soc: soc { compatible = "simple-bus"; interrupt-parent = <&gic>; @@ -412,8 +419,11 @@ "renesas,rcar-gen3-scif", "renesas,scif"; reg = <0 0xe6e88000 0 64>; interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>; - clocks = <&cpg CPG_MOD 310>; - clock-names = "fck"; + clocks = <&cpg CPG_MOD 310>, + <&cpg CPG_CORE R8A77990_CLK_S3D1C>, + <&scif_clk>; + clock-names = "fck", "brg_int", "scif_clk"; + power-domains = <&sysc R8A77990_PD_ALWAYS_ON>; resets = <&cpg 310>; status = "disabled"; |