[PATCH 7/7] stmmac: dwmac-sti: Pass sysconfig register offset via syscon dt property.
From: Lee Jones <hidden>
Date: 2014-11-19 08:51:12
Also in:
linux-devicetree, lkml, netdev
On Wed, 19 Nov 2014, Peter Griffin wrote:
quoted hunk ↗ jump to hunk
Based on Arnds review comments here https://lkml.org/lkml/2014/11/13/161, we should not be mixing address spaces in the reg property like this driver currently does. This patch updates the driver, dt docs and also the existing dt nodes to pass the sysconfig offset in the syscon dt property. This patch breaks DT compatibility! But this platform is considered WIP, and is only used by a few developers who are upstreaming support for it. This change has been done as a single atomic commit to ensure it is bisectable. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> --- Documentation/devicetree/bindings/net/sti-dwmac.txt | 14 +++++--------- arch/arm/boot/dts/stih415.dtsi | 12 ++++++------ arch/arm/boot/dts/stih416.dtsi | 12 ++++++------ drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c | 13 +++++++------ 4 files changed, 24 insertions(+), 27 deletions(-)diff --git a/Documentation/devicetree/bindings/net/sti-dwmac.txt b/Documentation/devicetree/bindings/net/sti-dwmac.txt index 6762a6b..d05c1e1 100644 --- a/Documentation/devicetree/bindings/net/sti-dwmac.txt +++ b/Documentation/devicetree/bindings/net/sti-dwmac.txt@@ -9,14 +9,10 @@ The device node has following properties. Required properties: - compatible : Can be "st,stih415-dwmac", "st,stih416-dwmac", "st,stih407-dwmac", "st,stid127-dwmac". - - reg : Offset of the glue configuration register map in system - configuration regmap pointed by st,syscon property and size.
Looks like you are removing the reg property description completely?
- - st,syscon : Should be phandle to system configuration node which
- encompases this glue registers.
+ - st,syscon : Should be phandle/offset pair. The phandle to the syscon node which
+ encompases the glue register, and the offset of the control register.
- st,gmac_en: this is to enable the gmac into a dedicated sysctl control
register available on STiH407 SoC.
- - sti-ethconf: this is the gmac glue logic register to enable the GMAC,
- select among the different modes and program the clk retiming.
- pinctrl-0: pin-control for all the MII mode supported.[...]
quoted hunk ↗ jump to hunk
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c@@ -123,7 +123,7 @@ struct sti_dwmac { bool ext_phyclk; /* Clock from external PHY */ u32 tx_retime_src; /* TXCLK Retiming*/ struct clk *clk; /* PHY clock */ - int ctrl_reg; /* GMAC glue-logic control register */ + u32 ctrl_reg; /* GMAC glue-logic control register */ int clk_sel_reg; /* GMAC ext clk selection register */ struct device *dev; struct regmap *regmap;@@ -286,11 +286,6 @@ static int sti_dwmac_parse_data(struct sti_dwmac *dwmac, if (!np) return -EINVAL; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-ethconf"); - if (!res) - return -ENODATA; - dwmac->ctrl_reg = res->start; - /* clk selection from extra syscfg register */ dwmac->clk_sel_reg = -ENXIO; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-clkconf");@@ -301,6 +296,12 @@ static int sti_dwmac_parse_data(struct sti_dwmac *dwmac, if (IS_ERR(regmap)) return PTR_ERR(regmap); + err = of_property_read_u32_index(np, "st,syscon", 1, &dwmac->ctrl_reg);
A few platforms have this format for sysconn now. We should toy with the idea of either making this a standard call, and/or defining '1'.
+ if (err) {
+ dev_err(dev, "Can't get sysconfig ctrl offset (%d)\n", err);
+ return err;
+ }
+
dwmac->dev = dev;
dwmac->interface = of_get_phy_mode(np);
dwmac->regmap = regmap;-- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org ? Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog