Re: Fix problems with Holly's DT representation of ethernet PHYs
From: David Gibson <hidden>
Date: 2007-05-25 04:47:49
On Fri, May 25, 2007 at 02:37:28PM +1000, David Gibson wrote:
On Fri, May 25, 2007 at 02:23:59PM +1000, David Gibson wrote:quoted
On Thu, May 24, 2007 at 08:44:20AM -0500, Josh Boyer wrote:quoted
On Wed, 2007-05-23 at 23:22 -0500, Kumar Gala wrote:quoted
On May 23, 2007, at 11:16 PM, David Gibson wrote:quoted
This patch fixes some problems with the way the Ethernet PHYs are represented in the device tree for the Holly board. This means changes to the dts itself, and to the code with instantiates the tsi108 ethernet platform devices based on the device tree. - First, and most importantly, the PHYs are given with an identical 'reg' property. This reg currently encodes the accessible register used to initiate mdio interaction with the PHYs, rather than a meaningful address on the parent bus (mdio in this case), which is incorrect. Instead we give the address of these registers as 'reg' in the mdio node itself, and encode the ID of each phy in their 'reg' propertys. The PHY's unit name addresses are updated to match. - Second, the PHYs give only "bcm54xx" as a compatible property. This is unfortunate, because there are many bcm54xx PHY models, and they have differences which can matter. We add a more precise compatible string, giving the precise PHY model (bcm5461A in this case).Is the compatible really need here? We are able to provide and bind drivers based on MII_PHYSID1/2. I don't see what putting the compatible proper gets us.I think it's needed until the TSI driver switches to phylib. Right now, it assumes that a Marvell phy is used, which is what is present on the Taiga MPC7448HPC2 board. The Holly board uses the Broadcom phy and we added the compatible code for that.I think Ben's suggested approach of using a special property in the phy node to indicate that this workaround is necessary is better. After all, the workaround isn't actually related to the type of PHY, which is what compatible encodes, but to how it's wired up. Revised patch below addressing this and other matters.Grah! Forgot quilt ref. Now a copy that might actually work.
Waah! Third time lucky? Fix problems with Holly's DT representation of ethernet PHYs This patch fixes some problems with the way the Ethernet PHYs are represented in the device tree for the Holly board. This means changes to the dts itself, and to the code with instantiates the tsi108 ethernet platform devices based on the device tree. - First, and most importantly, the PHYs are given with an identical 'reg' property. This reg currently encodes the accessible register used to initiate mdio interaction with the PHYs, rather than a meaningful address on the parent bus (mdio in this case), which is incorrect. Instead we give the address of these registers as 'reg' in the mdio node itself, and encode the ID of each phy in their 'reg' propertys. The PHY's unit name addresses are updated to match. - Second, the PHYs give only "bcm54xx" as a compatible property. This is unfortunate, because there are many bcm54xx PHY models, and they have differences which can matter. We add a more precise compatible string, giving the precise PHY model (bcm5461A in this case). Signed-off-by: David Gibson <redacted> Index: working-2.6/arch/powerpc/boot/dts/holly.dts ===================================================================
--- working-2.6.orig/arch/powerpc/boot/dts/holly.dts 2007-05-25 14:34:00.000000000 +1000
+++ working-2.6/arch/powerpc/boot/dts/holly.dts 2007-05-25 14:34:01.000000000 +1000@@ -60,22 +60,21 @@ reg = <7000 400>; }; - mdio@6000 { + MDIO: mdio@6000 { device_type = "mdio"; compatible = "tsi-ethernet"; + reg = <6000 50>; + #address-cells = <1>; + #size-cells = <0>; - PHY1: ethernet-phy@6000 { - device_type = "ethernet-phy"; - compatible = "bcm54xx"; - reg = <6000 50>; - phy-id = <1>; + PHY1: ethernet-phy@1 { + reg = <1>; + txc-rxc-delay-disable; }; - PHY2: ethernet-phy@6400 { - device_type = "ethernet-phy"; - compatible = "bcm54xx"; - reg = <6000 50>; - phy-id = <2>; + PHY2: ethernet-phy@2 { + reg = <2>; + txc-rxc-delay-disable; }; };
@@ -88,6 +87,7 @@ local-mac-address = [ 00 00 00 00 00 00 ]; interrupt-parent = < &/tsi109@c0000000/pic@7400 >; interrupts = <10 2>; + mdio-handle = <&MDIO>; phy-handle = <&PHY1>; };
@@ -100,6 +100,7 @@ local-mac-address = [ 00 00 00 00 00 00 ]; interrupt-parent = < &/tsi109@c0000000/pic@7400 >; interrupts = <11 2>; + mdio-handle = <&MDIO>; phy-handle = <&PHY2>; };
Index: working-2.6/arch/powerpc/sysdev/tsi108_dev.c ===================================================================
--- working-2.6.orig/arch/powerpc/sysdev/tsi108_dev.c 2007-05-25 14:34:00.000000000 +1000
+++ working-2.6/arch/powerpc/sysdev/tsi108_dev.c 2007-05-25 14:38:32.000000000 +1000@@ -75,9 +75,8 @@ static int __init tsi108_eth_of_init(voi (np = of_find_compatible_node(np, "network", "tsi-ethernet")) != NULL; i++) { struct resource r[2]; - struct device_node *phy; + struct device_node *phy, *mdio; hw_info tsi_eth_data; - const unsigned int *id; const unsigned int *phy_id; const void *mac_addr; const phandle *ph;
@@ -111,6 +110,13 @@ static int __init tsi108_eth_of_init(voi if (mac_addr) memcpy(tsi_eth_data.mac_addr, mac_addr, 6); + ph = of_get_property(np, "mdio-handle", NULL); + mdio = of_find_node_by_phandle(*ph); + ret = of_address_to_resource(mdio, 0, &res); + of_node_put(mdio); + if (ret) + goto unreg; + ph = of_get_property(np, "phy-handle", NULL); phy = of_find_node_by_phandle(*ph);
@@ -119,20 +125,17 @@ static int __init tsi108_eth_of_init(voi goto unreg; } - id = of_get_property(phy, "reg", NULL); - phy_id = of_get_property(phy, "phy-id", NULL); - ret = of_address_to_resource(phy, 0, &res); - if (ret) { - of_node_put(phy); - goto unreg; - } + phy_id = of_get_property(phy, "reg", NULL); + tsi_eth_data.regs = r[0].start; tsi_eth_data.phyregs = res.start; tsi_eth_data.phy = *phy_id; tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0); - if (of_device_is_compatible(phy, "bcm54xx")) + + if (of_get_property(phy, "txc-rxc-delay-disable", NULL)) tsi_eth_data.phy_type = TSI108_PHY_BCM54XX; of_node_put(phy); + ret = platform_device_add_data(tsi_eth_dev, &tsi_eth_data, sizeof(hw_info));
Index: working-2.6/arch/powerpc/boot/dts/mpc7448hpc2.dts ===================================================================
--- working-2.6.orig/arch/powerpc/boot/dts/mpc7448hpc2.dts 2007-05-25 14:34:00.000000000 +1000
+++ working-2.6/arch/powerpc/boot/dts/mpc7448hpc2.dts 2007-05-25 14:34:01.000000000 +1000@@ -58,24 +58,23 @@ compatible = "tsi-i2c"; }; - mdio@6000 { + MDIO: mdio@6000 { device_type = "mdio"; compatible = "tsi-ethernet"; + reg = <6000 50>; + #address-cells = <1>; + #size-cells = <0>; - phy8: ethernet-phy@6000 { + phy8: ethernet-phy@8 { interrupt-parent = <&mpic>; interrupts = <2 1>; - reg = <6000 50>; - phy-id = <8>; - device_type = "ethernet-phy"; + reg = <8>; }; - phy9: ethernet-phy@6400 { + phy9: ethernet-phy@9 { interrupt-parent = <&mpic>; interrupts = <2 1>; - reg = <6000 50>; - phy-id = <9>; - device_type = "ethernet-phy"; + reg = <9>; }; };
@@ -89,6 +88,7 @@ address = [ 00 06 D2 00 00 01 ]; interrupts = <10 2>; interrupt-parent = <&mpic>; + mdio-handle = <&MDIO>; phy-handle = <&phy8>; };
@@ -102,6 +102,7 @@ address = [ 00 06 D2 00 00 02 ]; interrupts = <11 2>; interrupt-parent = <&mpic>; + mdio-handle = <&MDIO>; phy-handle = <&phy9>; };
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
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