| Message ID | 20201207084752.1665-1-thunder.leizhen@huawei.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | ARM: dts: mmp2-olpc-xo-1-75: clear the warnings when make dtbs | expand |
From: Arnd Bergmann <arnd@arndb.de> On Mon, 7 Dec 2020 16:47:51 +0800, Zhen Lei wrote: > v1 --> v2: > Update the patch description and subject. > > I'm going to describe the detailed analysis here, because I don't want the > patch description to be too long. > > 0) make ARCH=arm CROSS_COMPILE=arm-linux-gnu- dtbs -j24 2>err.txt > vim err.txt > arch/arm/boot/dts/mmp2.dtsi:472.23-480.6: Warning (spi_bus_bridge): /soc/apb@d4000000/spi@d4037000: incorrect #address-cells for SPI bus > also defined at arch/arm/boot/dts/mmp2-olpc-xo-1-75.dts:225.7-237.3 > arch/arm/boot/dts/mmp2.dtsi:472.23-480.6: Warning (spi_bus_bridge): /soc/apb@d4000000/spi@d4037000: incorrect #size-cells for SPI bus > also defined at arch/arm/boot/dts/mmp2-olpc-xo-1-75.dts:225.7-237.3 > arch/arm/boot/dts/mmp2-olpc-xo-1-75.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' > > [...] I picked your version instead of my own. Applied to arm/fixes, thanks! [1/1] ARM: dts: mmp2-olpc-xo-1-75: clear the warnings when make dtbs commit: a0cab089baf3048020de7bee53bccd598747126a Arnd
v1 --> v2: Update the patch description and subject. I'm going to describe the detailed analysis here, because I don't want the patch description to be too long. 0) make ARCH=arm CROSS_COMPILE=arm-linux-gnu- dtbs -j24 2>err.txt vim err.txt arch/arm/boot/dts/mmp2.dtsi:472.23-480.6: Warning (spi_bus_bridge): /soc/apb@d4000000/spi@d4037000: incorrect #address-cells for SPI bus also defined at arch/arm/boot/dts/mmp2-olpc-xo-1-75.dts:225.7-237.3 arch/arm/boot/dts/mmp2.dtsi:472.23-480.6: Warning (spi_bus_bridge): /soc/apb@d4000000/spi@d4037000: incorrect #size-cells for SPI bus also defined at arch/arm/boot/dts/mmp2-olpc-xo-1-75.dts:225.7-237.3 arch/arm/boot/dts/mmp2-olpc-xo-1-75.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' 1) mmp2.dtsi is included by mmp2-olpc-xo-1-75.dts, and the content of ssp3 node is: arch/arm/boot/dts/mmp2.dtsi:472 ssp3: spi@d4037000 { compatible = "marvell,mmp2-ssp"; reg = <0xd4037000 0x1000>; clocks = <&soc_clocks MMP2_CLK_SSP2>; interrupts = <20>; #address-cells = <1>; #size-cells = <0>; <-------- #size-cells = <0> status = "disabled"; }; arch/arm/boot/dts/mmp2-olpc-xo-1-75.dts:225 &ssp3 { /delete-property/ #address-cells; <-------- #address-cells is deleted here /delete-property/ #size-cells; <-------- #size-cells is deleted here spi-slave; status = "okay"; ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>; slave { compatible = "olpc,xo1.75-ec"; spi-cpha; cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>; }; }; 2) scripts/dtc/checks.c: check_spi_bus_bridge() requires that the values of both #address-cells and #size-cells must be zero, when the node have "spi-slave" property. if (get_property(node, "spi-slave")) spi_addr_cells = 0; if (node_addr_cells(node) != spi_addr_cells) FAIL(c, dti, node, "incorrect #address-cells for SPI bus"); if (node_size_cells(node) != 0) FAIL(c, dti, node, "incorrect #size-cells for SPI bus"); 3) But both #address-cells and #size-cells properties are deleted. So the return value of node_addr_cells(node) is 2, and the return value of node_size_cells(node) is 1. #define node_addr_cells(n) \ (((n)->addr_cells == -1) ? 2 : (n)->addr_cells) #define node_size_cells(n) \ (((n)->size_cells == -1) ? 1 : (n)->size_cells) 4) The checks in 2) failed, so the above 0) warnings is displayed. v1: Patch 5/6. https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2341407.html Zhen Lei (1): ARM: dts: mmp2-olpc-xo-1-75: clear the warnings when make dtbs arch/arm/boot/dts/mmp2-olpc-xo-1-75.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)