diff options
Diffstat (limited to 'drivers/cpufreq/pasemi-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/pasemi-cpufreq.c | 54 |
1 files changed, 18 insertions, 36 deletions
diff --git a/drivers/cpufreq/pasemi-cpufreq.c b/drivers/cpufreq/pasemi-cpufreq.c index 75dfbd2a58ea..a3931349360f 100644 --- a/drivers/cpufreq/pasemi-cpufreq.c +++ b/drivers/cpufreq/pasemi-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2007 PA Semi, Inc * @@ -8,21 +9,6 @@ * * Based on arch/powerpc/platforms/cell/cbe_cpufreq.c: * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * */ #include <linux/cpufreq.h> @@ -32,10 +18,11 @@ #include <asm/hw_irq.h> #include <asm/io.h> -#include <asm/prom.h> #include <asm/time.h> #include <asm/smp.h> +#include <platforms/pasemi/pasemi.h> + #define SDCASR_REG 0x0100 #define SDCASR_REG_STRIDE 0x1000 #define SDCPWR_CFGA0_REG 0x0100 @@ -145,10 +132,19 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy) int err = -ENODEV; cpu = of_get_cpu_node(policy->cpu, NULL); - if (!cpu) goto out; + max_freqp = of_get_property(cpu, "clock-frequency", NULL); + of_node_put(cpu); + if (!max_freqp) { + err = -EINVAL; + goto out; + } + + /* we need the freq in kHz */ + max_freq = *max_freqp / 1000; + dn = of_find_compatible_node(NULL, NULL, "1682m-sdc"); if (!dn) dn = of_find_compatible_node(NULL, NULL, @@ -184,16 +180,6 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy) } pr_debug("init cpufreq on CPU %d\n", policy->cpu); - - max_freqp = of_get_property(cpu, "clock-frequency", NULL); - if (!max_freqp) { - err = -EINVAL; - goto out_unmap_sdcpwr; - } - - /* we need the freq in kHz */ - max_freq = *max_freqp / 1000; - pr_debug("max clock-frequency is at %u kHz\n", max_freq); pr_debug("initializing frequency table\n"); @@ -209,10 +195,8 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->cur = pas_freqs[cur_astate].frequency; ppc_proc_freq = policy->cur * 1000ul; - return cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency()); - -out_unmap_sdcpwr: - iounmap(sdcpwr_mapbase); + cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency()); + return 0; out_unmap_sdcasr: iounmap(sdcasr_mapbase); @@ -220,21 +204,19 @@ out: return err; } -static int pas_cpufreq_cpu_exit(struct cpufreq_policy *policy) +static void pas_cpufreq_cpu_exit(struct cpufreq_policy *policy) { /* * We don't support CPU hotplug. Don't unmap after the system * has already made it to a running state. */ if (system_state >= SYSTEM_RUNNING) - return 0; + return; if (sdcasr_mapbase) iounmap(sdcasr_mapbase); if (sdcpwr_mapbase) iounmap(sdcpwr_mapbase); - - return 0; } static int pas_cpufreq_target(struct cpufreq_policy *policy, @@ -263,7 +245,6 @@ static struct cpufreq_driver pas_cpufreq_driver = { .exit = pas_cpufreq_cpu_exit, .verify = cpufreq_generic_frequency_table_verify, .target_index = pas_cpufreq_target, - .attr = cpufreq_generic_attr, }; /* @@ -287,5 +268,6 @@ static void __exit pas_cpufreq_exit(void) module_init(pas_cpufreq_init); module_exit(pas_cpufreq_exit); +MODULE_DESCRIPTION("cpufreq driver for PA Semi PWRficient"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>, Olof Johansson <olof@lixom.net>"); |