Hello John,
Thanks for info.
I found below configs are not set in 3.15 by default which were set in 3.8.
If we set below configs in 3.15, *it works including NFS.*
*CONFIG_IP_PNP=y*
*CONFIG_IP_PNP_DHCP=y*
*CONFIG_ROOT_NFS=y*
*optional:*
*CONFIG_IP_PNP_BOOTP=y*
*CONFIG_IP_PNP_RARP=y*
On Sat, Jul 5, 2014 at 11:49 PM, John Syn <john3...@gmail.com> wrote:
> This is a known problem with V3.15 and NFS. We are working on finding a
> solution. First, you must build the SMSC driver into the kernel. Currently
> it is built as a kernel module which won’t work because you have to mount
> the rootfs to load the kernel module. That will eliminate the first issue:
>
> *3.758612] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00,
> driver unknown*
>
> Next we are trying to find out why the network isn’t getting started.
> Looks like something to do with cpsw. Using the same MLO, u-boot, uEnv.txt
> and rootfs, V3.8.13-bone57 works just fine. Changing the kernel to
> V3.15.3-bone3, I get the same problem you have.
>
> Regards,
>
> John
>
> From: Vishnu Patekar <vishnupatekar0...@gmail.com>
> Reply-To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com>
> Date: Saturday, July 5, 2014 at 11:01 AM
> To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com>
> Subject: Re: [beagleboard] Re: Beaglebone Black Ethernet Phy Not Detected
> on Boot.
>
> Hello,
> I'm using BBB board A5C, and kernel version 3.15.3-bone3.1. I also see
> ethernet PHY is not detected. Log as below:
> Please refer detailed attached log.
>
>
> *[ 3.740457] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6*
> *[ 3.746859] davinci_mdio 4a101000.mdio: detected phy mask fffffffe*
> *[ 3.754398] libphy: 4a101000.mdio: probed*
> *[ 3.758612] davinci_mdio 4a101000.mdio: phy[0]: device
> 4a101000.mdio:00, driver unknown*
> *[ 3.767567] Detected MACID = 90:59:af:5c:61:78*
> *[ 3.773165] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)*
> *[ 3.779741] sr_init: No PMIC hook to init smartreflex*
> *[ 3.785201] sr_init: platform driver register failed for SR*
> *[ 3.794297] VFS: Cannot open root device "nfs" or
> unknown-block(0,255): error -6*
> *[ 3.802114] Please append a correct "root=" boot option; here are the
> available partitions:*
> *[ 3.810888] b300 1875968 mmcblk0 driver: mmcblk*
> *[ 3.816464] b301 72261 mmcblk0p1 00000000-01*
> *[ 3.822046] b302 1799280 mmcblk0p2 00000000-02*
> *[ 3.827617] b310 1024 mmcblk0boot1 (driver?)*
> *[ 3.833197] b308 1024 mmcblk0boot0 (driver?)*
> *[ 3.838767] Kernel panic - not syncing: VFS: Unable to mount root fs
> on unknown-block(0,255)*
> *[ 3.847616] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.3-bone3.1 #1*
> *[ 3.854410] [<c00113f5>] (unwind_backtrace) from [<c000fa37>]
> (show_stack+0xb/0xc)*
> *[ 3.862356] [<c000fa37>] (show_stack) from [<c054dd05>]
> (panic+0x65/0x170)*
> *[ 3.869572] [<c054dd05>] (panic) from [<c08a6d0b>]
> (mount_block_root+0x1af/0x21c)*
> *[ 3.877421] [<c08a6d0b>] (mount_block_root) from [<c08a6eb1>]
> (prepare_namespace+0xe9/0x128)*
> *[ 3.886271] [<c08a6eb1>] (prepare_namespace) from [<c08a6a93>]
> (kernel_init_freeable+0x1ab/0x1b8)*
> *[ 3.895574] [<c08a6a93>] (kernel_init_freeable) from [<c054d37b>]
> (kernel_init+0xb/0xb4)*
> *[ 3.904060] [<c054d37b>] (kernel_init) from [<c000d1f9>]
> (ret_from_fork+0x11/0x38)*
> *[ 3.911998] drm_kms_helper: panic occurred, switching back to text
> console*
> *[ 3.919217] ---[ end Kernel panic - not syncing: VFS: Unable to mount
> root fs on unknown-block(0,255)*
>
>
>
> On Sat, Jun 28, 2014 at 2:22 AM, Jay @ Control Module Industries <
> cmidr...@gmail.com> wrote:
>
>> I have encountered the same issue(s) on A6A boards.
>>
>> I couldn't find a patch, so I wrote this patch to update the device tree
>> in the davinci_mdio driver in the 3.15.1 tree, it seems to correct it. I
>> would welcome any input on a different approach.
>>
>> diff --git a/drivers/net/ethernet/ti/davinci_mdio.c
>> b/drivers/net/ethernet/ti/davinci_mdio.c
>> index 0cca9de..e5a9cdc 100644
>> --- a/drivers/net/ethernet/ti/davinci_mdio.c
>> +++ b/drivers/net/ethernet/ti/davinci_mdio.c
>> @@ -39,6 +39,7 @@
>> #include <linux/of.h>
>> #include <linux/of_device.h>
>> #include <linux/pinctrl/consumer.h>
>> +#include <linux/phy.h>
>>
>> /*
>> * This timeout definition is a worst-case ultra defensive measure
>> against
>> @@ -97,6 +98,10 @@ struct davinci_mdio_data {
>> unsigned long access_time; /* jiffies */
>> };
>>
>> +#if IS_ENABLED(CONFIG_OF)
>> +static void davinci_mdio_update_dt_from_phymask(u32 phy_mask);
>> +#endif
>> +
>> static void __davinci_mdio_reset(struct davinci_mdio_data *data)
>> {
>> u32 mdio_in, div, mdio_out_khz, access_time;
>> @@ -150,6 +155,11 @@ static int davinci_mdio_reset(struct mii_bus *bus)
>> /* restrict mdio bus to live phys only */
>> dev_info(data->dev, "detected phy mask %x\n", ~phy_mask);
>> phy_mask = ~phy_mask;
>> +
>> + #if IS_ENABLED(CONFIG_OF)
>> + davinci_mdio_update_dt_from_phymask(phy_mask);
>> + #endif
>> +
>> } else {
>> /* desperately scan all phys */
>> dev_warn(data->dev, "no live phy, scanning all\n");
>> @@ -312,6 +322,79 @@ static int davinci_mdio_probe_dt(struct
>> mdio_platform_data *data,
>> }
>> #endif
>>
>> +#if IS_ENABLED(CONFIG_OF)
>> +static void davinci_mdio_update_dt_from_phymask(u32 phy_mask)
>> +{
>> + int i, len;
>> + u32 addr;
>> + __be32 *old_phy_p, *phy_id_p;
>> + struct property *phy_id_property = NULL;
>> + struct device_node *node_p, *slave_p;
>> +
>> + addr = 0;
>> +
>> + for (i = 0; i < PHY_MAX_ADDR; i++) {
>> + if ((phy_mask & (1 << i)) == 0) {
>> + addr = (u32) i;
>> + break;
>> + }
>> + }
>> +
>> + for_each_compatible_node(node_p, NULL, "ti,cpsw") {
>> + for_each_node_by_name(slave_p, "slave") {
>> +
>> + old_phy_p = (__be32 *) of_get_property(slave_p, "phy_id",
>> &len);
>> +
>> + if (len != (sizeof(__be32 *) * 2))
>> + goto err_out;
>> +
>> + if (old_phy_p) {
>> +
>> + phy_id_property = kzalloc(sizeof(*phy_id_property),
>> GFP_KERNEL);
>> +
>> + if (! phy_id_property)
>> + goto err_out;
>> +
>> + phy_id_property->length = len;
>> + phy_id_property->name = kstrdup("phy_id", GFP_KERNEL);
>> + phy_id_property->value = kzalloc(len, GFP_KERNEL);
>> +
>> + if (! phy_id_property->name)
>> + goto err_out;
>> +
>> + if (! phy_id_property->value)
>> + goto err_out;
>> +
>> + memcpy(phy_id_property->value, old_phy_p, len);
>> +
>> + phy_id_p = (__be32 *) phy_id_property->value + 1;
>> +
>> + *phy_id_p = cpu_to_be32(addr);
>> +
>> + of_update_property(slave_p, phy_id_property);
>> +
>> + ++addr;
>> + }
>> + }
>> + }
>> +
>> + return;
>> +
>> +err_out:
>> +
>> + if (phy_id_property) {
>> + if (phy_id_property->name)
>> + kfree(phy_id_property->name);
>> +
>> + if (phy_id_property->value)
>> + kfree(phy_id_property->value);
>> +
>> + if (phy_id_property)
>> + kfree(phy_id_property);
>> + }
>> +}
>> +#endif
>> +
>> static int davinci_mdio_probe(struct platform_device *pdev)
>> {
>> struct mdio_platform_data *pdata = dev_get_platdata(&pdev->dev);
>>
>> --
>> For more options, visit http://beagleboard.org/discuss
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>
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