[PATCH v4 4/5] ARM: dts: DRA7: add entry for qspi mmap region
From: tony@atomide.com (Tony Lindgren)
Date: 2015-11-30 22:34:20
Also in:
linux-devicetree, linux-omap, linux-spi, lkml
* Vignesh R [off-list ref] [151129 21:16]:
Add qspi memory mapped region entries for DRA7xx based SoCs. Also, update the binding documents for the controller to document this change. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Vignesh R <vigneshr@ti.com>
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quoted hunk ↗ jump to hunk
--- a/Documentation/devicetree/bindings/spi/ti_qspi.txt +++ b/Documentation/devicetree/bindings/spi/ti_qspi.txt@@ -26,3 +26,17 @@ qspi: qspi at 4b300000 { spi-max-frequency = <25000000>; ti,hwmods = "qspi"; }; + +For dra7xx: +qspi: qspi at 4b300000 { + compatible = "ti,dra7xxx-qspi"; + reg = <0x4b300000 0x100>, + <0x5c000000 0x4000000>, + <0x4a002558 0x4>; + reg-names = "qspi_base", "qspi_mmap", + "qspi_ctrlmod"; + #address-cells = <1>; + #size-cells = <0>; + spi-max-frequency = <48000000>; + ti,hwmods = "qspi"; +};
Actually none of the IO areas above are within the same interconnect target: 0x4b300000 QSPI0 address space in L3 main interconnect 0x5c000000 QSPI1 address space in L3 main interconnect 0x4a002558 CTRL_CORE_CONTROL_IO_2 in System Control Module (SCM) in L4_CFG The first two address spaces should be two separate instances of this driver. The CTRL_CORE_CONTROL_IO_2 needs seems like a shared clock register that needs to be accessed using the clock framework most likely. So not applying, this will be impossible to move to some real interconnect driver until these issues are fixed. Regards, Tony