From: Arnd Bergmann <arnd@arndb•de>
To: linuxppc-dev@ozlabs•org, minyard@acm•org
Cc: Christian Krafft <krafft@de•ibm.com>,
openipmi-developer@lists•sourceforge.net
Subject: Re: [Openipmi-developer] [patch 1/1] ipmi: add autosensing of ipmi device on powerpc using device-tree
Date: Fri, 8 Dec 2006 20:49:01 +0100 [thread overview]
Message-ID: <200612082049.02545.arnd@arndb.de> (raw)
In-Reply-To: <20061208185902.GA14675@localdomain>
On Friday 08 December 2006 19:59, Corey Minyard wrote:
>
> + if (match->data) {
> + dev_warn(&dev->dev, "unknown interface type\n");
> + return -ENODEV;
> + }
> +
>
> What's this mean? I don't understand the error.
The check is bogus and should be removed. The effect is that
only SI_KCS can work, all others will be rejected.
> + info->io.regsize = resource0.end - resource0.start + 1;
> + info->io.regspacing = resource1.start - resource0.start;
>
> Are you sure this is a reliable way to check the register spacing and
> register size? Register size means "how big is a register (8, 16, 32
> bits)". Register spacing means (how many bytes are there between
> registers. If you had two registers that were 8 bits and 4 bytes
> apart, for instance, I don't believe the above calculations would work.
Looks right to me. Assume these of properties
#address-cells: <1>
#size-cells: <1>
reg: <0x100> <1> <0x104> <1> /* start, length, start, length */
converting them to resources gives you
resource0 = { .start = 0x100, .end = 0x100, }
resource1 = { .start = 0x104, .end = 0x104, }
consequently, you end up with
info->io = {
.regsize = 1,
.regspacing = 4,
.addr_data = 0x100,
};
which is exactly what you want.
> +static int ipmi_of_remove(struct of_device *dev)
> +{
> + return 0;
> +}
>
> With the newest IPMI patches (only in git right now), hot removal of
> interfaces is supported. Is that what this is for? If so, you can
> call cleanup_one_si() on the interface.
ok, great.
> Here's a new patch. Can you test that unloading the module works
> correctly?
Christian has already gone home for the weekend, and I don't have
access to his machine, so testing will probably have to wait until
Monday.
> +static void __devinit of_find_bmc(void)
> +{
> + of_register_platform_driver(&ipmi_of_platform_driver);
> +}
> +#endif /* CONFIG_PPC_OF */
I guess this function could also be removed entirely, it doesn't
add anything useful.
Arnd <><
next prev parent reply other threads:[~2006-12-08 19:49 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-07 16:22 [patch 0/1] ipmi: add autosensing of ipmi device on powerpc using device-tree Christian Krafft
2006-12-07 16:24 ` [patch 1/1] " Christian Krafft
2006-12-08 10:24 ` Heiko Joerg Schick
2006-12-08 17:19 ` [Openipmi-developer] " Corey Minyard
2006-12-11 12:13 ` Christian Krafft
2006-12-08 18:59 ` Corey Minyard
2006-12-08 19:49 ` Arnd Bergmann [this message]
2006-12-08 22:50 ` Benjamin Herrenschmidt
2006-12-09 0:00 ` Arnd Bergmann
2006-12-09 0:07 ` Corey Minyard
2006-12-09 11:44 ` Arnd Bergmann
2006-12-10 18:42 ` Heiko J Schick
2006-12-11 10:11 ` Arnd Bergmann
2006-12-11 13:01 ` Heiko J Schick
2006-12-11 13:37 ` Segher Boessenkool
2006-12-11 13:18 ` Segher Boessenkool
2006-12-11 14:25 ` Arnd Bergmann
2006-12-11 16:28 ` Heiko J Schick
2006-12-11 16:58 ` Segher Boessenkool
2006-12-11 17:20 ` Christian Krafft
2006-12-11 16:54 ` Segher Boessenkool
2006-12-09 2:14 ` Benjamin Herrenschmidt
2006-12-09 9:46 ` Segher Boessenkool
2006-12-09 11:46 ` Arnd Bergmann
2006-12-08 0:41 ` [patch 0/1] " Paul Mackerras
2006-12-08 14:04 ` Arnd Bergmann
2006-12-08 17:17 ` [Openipmi-developer] " Corey Minyard
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