From addb32866d99068307f8eddb282ebb325d18446f Mon Sep 17 00:00:00 2001 From: Clark Wang Date: Wed, 6 Mar 2019 06:30:36 +0000 Subject: doc: lpspi: Document DT bindings for LPSPI clocks Add introductions of clocks and clock-names strings. Signed-off-by: Clark Wang Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt') diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt index 6cc3c6fe25a3..e71b81a41ac0 100644 --- a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt +++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.txt @@ -7,7 +7,11 @@ Required properties: - reg : address and length of the lpspi master registers - interrupt-parent : core interrupt controller - interrupts : lpspi interrupt -- clocks : lpspi clock specifier +- clocks : lpspi clock specifier. Its number and order need to correspond to the + value in clock-names. +- clock-names : Corresponding to per clock and ipg clock in "clocks" + respectively. In i.MX7ULP, it only has per clk, so use CLK_DUMMY + to fill the "ipg" blank. - spi-slave : spi slave mode support. In slave mode, add this attribute without value. In master mode, remove it. @@ -18,6 +22,8 @@ lpspi2: lpspi@40290000 { reg = <0x40290000 0x10000>; interrupt-parent = <&intc>; interrupts = ; - clocks = <&clks IMX7ULP_CLK_LPSPI2>; + clocks = <&clks IMX7ULP_CLK_LPSPI2>, + <&clks IMX7ULP_CLK_DUMMY>; + clock-names = "per", "ipg"; spi-slave; }; -- cgit v1.2.3-59-g8ed1b