From: Arnd Bergmann <arnd@arndb•de>
To: linuxppc-dev@ozlabs•org
Cc: Olof Johansson <olof@lixom•net>,
egor@pasemi•com, paulus@samba•org, cpufreq@lists•linux.org.uk
Subject: Re: [PATCH] [2.6.22] pasemi: cpufreq driver
Date: Thu, 26 Apr 2007 01:47:35 +0200 [thread overview]
Message-ID: <200704260147.35878.arnd@arndb.de> (raw)
In-Reply-To: <20070425204633.GC19781@lixom.net>
On Wednesday 25 April 2007, Olof Johansson wrote:
> +/* This should eventually come out of the device tree */
> +#define SDCPWR_BASE 0xfc104000
> +#define SDCPWR_SIZE 0x1000
> +
> +#define SDCASR_BASE 0xfc120000
> +#define SDCASR_SIZE 0x2000
the comment is right. Why don't you do it then? ;-)
> +static int pas_cpufreq_cpu_init (struct cpufreq_policy *policy)
> +{
> + u32 *max_freq;
> + int i, cur_astate;
> + struct device_node *cpu;
> +
> + cpu = of_get_cpu_node(policy->cpu, NULL);
> +
> + if(!cpu)
> + return -ENODEV;
> +
> + sdcpwr_mapbase = ioremap(SDCPWR_BASE, SDCPWR_SIZE);
> + sdcasr_mapbase = ioremap(SDCASR_BASE, SDCASR_SIZE);
> + if (!sdcpwr_mapbase || !sdcasr_mapbase)
> + panic("SDCMAP: Cannot map registers!");
I can't see any check in here that finds out if you are actually running on
the right hardware.
The proper way to implement this driver would be to register an
of_platform_driver for the cpufreq device and then get the register
addresses from there,
> @@ -155,7 +155,7 @@ source "drivers/cpufreq/Kconfig"
>
> config CPU_FREQ_PMAC
> bool "Support for Apple PowerBooks"
> - depends on CPU_FREQ && ADB_PMU && PPC32
> + depends on ADB_PMU && PPC32
> select CPU_FREQ_TABLE
> help
> This adds support for frequency switching on Apple PowerBooks,
> @@ -164,11 +164,21 @@ config CPU_FREQ_PMAC
>
> config CPU_FREQ_PMAC64
> bool "Support for some Apple G5s"
> - depends on CPU_FREQ && PPC64
> + depends on PPC64
> select CPU_FREQ_TABLE
> help
> This adds support for frequency switching on Apple iMac G5,
> and some of the more recent desktop G5 machines as well.
Why this change?
> +config PPC_PASEMI_CPUFREQ
> + bool "Support for PA Semi PWRficient"
> + depends on PPC_PASEMI
> + default y
> + select CPU_FREQ_TABLE
> + help
> + This adds the support for frequency switching on PA Semi
> + PWRficient processors.
> +
> endmenu
Why bool and not tristate?
Arnd <><
next prev parent reply other threads:[~2007-04-25 23:48 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-25 20:46 [PATCH] [2.6.22] pasemi: cpufreq driver Olof Johansson
2007-04-25 23:47 ` Arnd Bergmann [this message]
2007-04-25 23:57 ` Olof Johansson
2007-04-26 1:57 ` Olof Johansson
2007-04-26 6:56 ` cbe_cpufreq crashes my machine Olof Johansson
2007-04-26 8:39 ` Benjamin Herrenschmidt
2007-04-26 23:07 ` [PATCH] cell: cbe_cpufreq cleanup and crash fix Olof Johansson
2007-04-27 5:22 ` [Cbe-oss-dev] " Akinobu Mita
2007-04-27 5:32 ` Olof Johansson
2007-04-27 5:33 ` [PATCH v2] " Olof Johansson
2007-04-27 7:55 ` Christian Krafft
2007-04-26 5:37 ` [PATCH v2] [2.6.22] pasemi: cpufreq driver Olof Johansson
2007-04-26 8:55 ` Arnd Bergmann
2007-04-26 16:48 ` Olof Johansson
2007-04-26 17:11 ` Arnd Bergmann
2007-04-26 19:05 ` Segher Boessenkool
2007-04-26 20:38 ` Olof Johansson
2007-04-27 0:10 ` Segher Boessenkool
2007-04-26 20:26 ` Olof Johansson
2007-04-26 20:43 ` Arnd Bergmann
2007-04-26 10:26 ` Johannes Berg
2007-04-26 20:37 ` Olof Johansson
2007-04-27 9:40 ` Johannes Berg
2007-04-27 18:09 ` Olof Johansson
2007-04-27 5:46 ` [PATCH v3] " Olof Johansson
2007-04-29 2:50 ` Dominik Brodowski
2007-04-29 3:40 ` Stephen Rothwell
2007-04-29 4:39 ` Olof Johansson
2007-04-29 4:42 ` Olof Johansson
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