Re: [PATCH v2 2/3] net: can: c_can: Add syscon/regmap RAMINIT mechanism
From: Wolfram Sang <hidden>
Date: 2014-09-30 13:26:50
Also in:
linux-can, linux-omap
On Tue, Sep 09, 2014 at 05:31:09PM +0300, Roger Quadros wrote:
quoted hunk ↗ jump to hunk
Some TI SoCs like DRA7 have a RAMINIT register specification different from the other AMxx SoCs and as expected by the existing driver. To add more insanity, this register is shared with other IPs like DSS, PCIe and PWM. Provides a more generic mechanism to specify the RAMINIT register location and START/DONE bit position and use the syscon/regmap framework to access the register. Signed-off-by: Roger Quadros <redacted> --- .../devicetree/bindings/net/can/c_can.txt | 7 ++ drivers/net/can/c_can/c_can.h | 11 ++- drivers/net/can/c_can/c_can_platform.c | 109 +++++++++++++++------ 3 files changed, 95 insertions(+), 32 deletions(-)diff --git a/Documentation/devicetree/bindings/net/can/c_can.txt b/Documentation/devicetree/bindings/net/can/c_can.txt index 8f1ae81..e12d1a1 100644 --- a/Documentation/devicetree/bindings/net/can/c_can.txt +++ b/Documentation/devicetree/bindings/net/can/c_can.txt@@ -13,6 +13,13 @@ Optional properties: - ti,hwmods : Must be "d_can<n>" or "c_can<n>", n being the instance number +- ti,raminit-syscon : Handle to system control region that contains the + RAMINIT register. If specified, the second memory resource + in the reg property must index into the RAMINIT + register within the syscon region
There seems to be a simple "syscon" property these days.
+- ti,raminit-start-bit : Bit posistion of START bit in the RAMINIT register +- ti,raminit-done-bit : Bit position of DONE bit in the RAMINIT register
This should not be encoded in DT! This is not describing hardware setup. The driver should know where the bits are for the syscon phandle, depending on which SoC it runs...
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