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author | John Crispin <john@openwrt.org> | 2016-02-25 10:14:05 +0000 |
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committer | John Crispin <john@openwrt.org> | 2016-02-25 10:14:05 +0000 |
commit | 0834f9f07631a8857a96614e37cb21e1dc84ffb4 (patch) | |
tree | c62e777de69d8397ed7870991bc46d5648a20046 /target/linux/brcm2708/patches-4.1/0017-Add-cpufreq-driver.patch | |
parent | b3dc9566a46efa67951ff6ae28e4397da9db92af (diff) | |
download | master-31e0f0ae-0834f9f07631a8857a96614e37cb21e1dc84ffb4.tar.gz master-31e0f0ae-0834f9f07631a8857a96614e37cb21e1dc84ffb4.tar.bz2 master-31e0f0ae-0834f9f07631a8857a96614e37cb21e1dc84ffb4.zip |
brcm2708: remove linux 4.1 support
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
SVN-Revision: 48766
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0017-Add-cpufreq-driver.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.1/0017-Add-cpufreq-driver.patch | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0017-Add-cpufreq-driver.patch b/target/linux/brcm2708/patches-4.1/0017-Add-cpufreq-driver.patch deleted file mode 100644 index 5c271b5ae8..0000000000 --- a/target/linux/brcm2708/patches-4.1/0017-Add-cpufreq-driver.patch +++ /dev/null @@ -1,268 +0,0 @@ -From ce9f1474536ee0a348a6edaefe36c537d76e8f1b Mon Sep 17 00:00:00 2001 -From: popcornmix <popcornmix@gmail.com> -Date: Wed, 3 Jul 2013 00:49:20 +0100 -Subject: [PATCH 017/222] Add cpufreq driver - -Signed-off-by: popcornmix <popcornmix@gmail.com> ---- - drivers/cpufreq/Kconfig.arm | 9 ++ - drivers/cpufreq/Makefile | 1 + - drivers/cpufreq/bcm2835-cpufreq.c | 224 ++++++++++++++++++++++++++++++++++++++ - 3 files changed, 234 insertions(+) - create mode 100644 drivers/cpufreq/bcm2835-cpufreq.c - ---- a/drivers/cpufreq/Kconfig.arm -+++ b/drivers/cpufreq/Kconfig.arm -@@ -258,6 +258,15 @@ config ARM_SPEAR_CPUFREQ - help - This adds the CPUFreq driver support for SPEAr SOCs. - -+config ARM_BCM2835_CPUFREQ -+ depends on BCM2708_MBOX -+ bool "BCM2835 Driver" -+ default y -+ help -+ This adds the CPUFreq driver for BCM2835 -+ -+ If in doubt, say N. -+ - config ARM_TEGRA_CPUFREQ - bool "TEGRA CPUFreq support" - depends on ARCH_TEGRA ---- a/drivers/cpufreq/Makefile -+++ b/drivers/cpufreq/Makefile -@@ -77,6 +77,7 @@ obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5p - obj-$(CONFIG_ARM_SA1100_CPUFREQ) += sa1100-cpufreq.o - obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o - obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o -+obj-$(CONFIG_ARM_BCM2835_CPUFREQ) += bcm2835-cpufreq.o - obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra-cpufreq.o - obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ) += vexpress-spc-cpufreq.o - ---- /dev/null -+++ b/drivers/cpufreq/bcm2835-cpufreq.c -@@ -0,0 +1,224 @@ -+/***************************************************************************** -+* Copyright 2011 Broadcom Corporation. All rights reserved. -+* -+* Unless you and Broadcom execute a separate written software license -+* agreement governing use of this software, this software is licensed to you -+* under the terms of the GNU General Public License version 2, available at -+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). -+* -+* Notwithstanding the above, under no circumstances may you combine this -+* software in any way with any other Broadcom software provided under a -+* license other than the GPL, without Broadcom's express prior written -+* consent. -+*****************************************************************************/ -+ -+/***************************************************************************** -+* FILENAME: bcm2835-cpufreq.h -+* DESCRIPTION: This driver dynamically manages the CPU Frequency of the ARM -+* processor. Messages are sent to Videocore either setting or requesting the -+* frequency of the ARM in order to match an appropiate frequency to the current -+* usage of the processor. The policy which selects the frequency to use is -+* defined in the kernel .config file, but can be changed during runtime. -+*****************************************************************************/ -+ -+/* ---------- INCLUDES ---------- */ -+#include <linux/kernel.h> -+#include <linux/init.h> -+#include <linux/module.h> -+#include <linux/cpufreq.h> -+#include <linux/platform_data/mailbox-bcm2708.h> -+ -+/* ---------- DEFINES ---------- */ -+/*#define CPUFREQ_DEBUG_ENABLE*/ /* enable debugging */ -+#define MODULE_NAME "bcm2835-cpufreq" -+ -+#define VCMSG_ID_ARM_CLOCK 0x000000003 /* Clock/Voltage ID's */ -+ -+/* debug printk macros */ -+#ifdef CPUFREQ_DEBUG_ENABLE -+#define print_debug(fmt,...) pr_debug("%s:%s:%d: "fmt, MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__) -+#else -+#define print_debug(fmt,...) -+#endif -+#define print_err(fmt,...) pr_err("%s:%s:%d: "fmt, MODULE_NAME, __func__,__LINE__, ##__VA_ARGS__) -+#define print_info(fmt,...) pr_info("%s: "fmt, MODULE_NAME, ##__VA_ARGS__) -+ -+/* tag part of the message */ -+struct vc_msg_tag { -+ uint32_t tag_id; /* the message id */ -+ uint32_t buffer_size; /* size of the buffer (which in this case is always 8 bytes) */ -+ uint32_t data_size; /* amount of data being sent or received */ -+ uint32_t dev_id; /* the ID of the clock/voltage to get or set */ -+ uint32_t val; /* the value (e.g. rate (in Hz)) to set */ -+}; -+ -+/* message structure to be sent to videocore */ -+struct vc_msg { -+ uint32_t msg_size; /* simply, sizeof(struct vc_msg) */ -+ uint32_t request_code; /* holds various information like the success and number of bytes returned (refer to mailboxes wiki) */ -+ struct vc_msg_tag tag; /* the tag structure above to make */ -+ uint32_t end_tag; /* an end identifier, should be set to NULL */ -+}; -+ -+/* ---------- GLOBALS ---------- */ -+static struct cpufreq_driver bcm2835_cpufreq_driver; /* the cpufreq driver global */ -+ -+static struct cpufreq_frequency_table bcm2835_freq_table[] = { -+ {0, 0, 0}, -+ {0, 0, 0}, -+ {0, 0, CPUFREQ_TABLE_END}, -+}; -+ -+/* -+ =============================================== -+ clk_rate either gets or sets the clock rates. -+ =============================================== -+*/ -+static uint32_t bcm2835_cpufreq_set_clock(int cur_rate, int arm_rate) -+{ -+ int s, actual_rate=0; -+ struct vc_msg msg; -+ -+ /* wipe all previous message data */ -+ memset(&msg, 0, sizeof msg); -+ -+ msg.msg_size = sizeof msg; -+ -+ msg.tag.tag_id = VCMSG_SET_CLOCK_RATE; -+ msg.tag.buffer_size = 8; -+ msg.tag.data_size = 8; /* we're sending the clock ID and the new rates which is a total of 2 words */ -+ msg.tag.dev_id = VCMSG_ID_ARM_CLOCK; -+ msg.tag.val = arm_rate * 1000; -+ -+ /* send the message */ -+ s = bcm_mailbox_property(&msg, sizeof msg); -+ -+ /* check if it was all ok and return the rate in KHz */ -+ if (s == 0 && (msg.request_code & 0x80000000)) -+ actual_rate = msg.tag.val/1000; -+ -+ print_debug("Setting new frequency = %d -> %d (actual %d)\n", cur_rate, arm_rate, actual_rate); -+ return actual_rate; -+} -+ -+static uint32_t bcm2835_cpufreq_get_clock(int tag) -+{ -+ int s; -+ int arm_rate = 0; -+ struct vc_msg msg; -+ -+ /* wipe all previous message data */ -+ memset(&msg, 0, sizeof msg); -+ -+ msg.msg_size = sizeof msg; -+ msg.tag.tag_id = tag; -+ msg.tag.buffer_size = 8; -+ msg.tag.data_size = 4; /* we're just sending the clock ID which is one word long */ -+ msg.tag.dev_id = VCMSG_ID_ARM_CLOCK; -+ -+ /* send the message */ -+ s = bcm_mailbox_property(&msg, sizeof msg); -+ -+ /* check if it was all ok and return the rate in KHz */ -+ if (s == 0 && (msg.request_code & 0x80000000)) -+ arm_rate = msg.tag.val/1000; -+ -+ print_debug("%s frequency = %d\n", -+ tag == VCMSG_GET_CLOCK_RATE ? "Current": -+ tag == VCMSG_GET_MIN_CLOCK ? "Min": -+ tag == VCMSG_GET_MAX_CLOCK ? "Max": -+ "Unexpected", arm_rate); -+ -+ return arm_rate; -+} -+ -+/* -+ ==================================================== -+ Module Initialisation registers the cpufreq driver -+ ==================================================== -+*/ -+static int __init bcm2835_cpufreq_module_init(void) -+{ -+ print_debug("IN\n"); -+ return cpufreq_register_driver(&bcm2835_cpufreq_driver); -+} -+ -+/* -+ ============= -+ Module exit -+ ============= -+*/ -+static void __exit bcm2835_cpufreq_module_exit(void) -+{ -+ print_debug("IN\n"); -+ cpufreq_unregister_driver(&bcm2835_cpufreq_driver); -+ return; -+} -+ -+/* -+ ============================================================== -+ Initialisation function sets up the CPU policy for first use -+ ============================================================== -+*/ -+static int bcm2835_cpufreq_driver_init(struct cpufreq_policy *policy) -+{ -+ /* measured value of how long it takes to change frequency */ -+ const unsigned int transition_latency = 355000; /* ns */ -+ -+ /* now find out what the maximum and minimum frequencies are */ -+ bcm2835_freq_table[0].frequency = bcm2835_cpufreq_get_clock(VCMSG_GET_MIN_CLOCK); -+ bcm2835_freq_table[1].frequency = bcm2835_cpufreq_get_clock(VCMSG_GET_MAX_CLOCK); -+ -+ print_info("min=%d max=%d\n", bcm2835_freq_table[0].frequency, bcm2835_freq_table[1].frequency); -+ return cpufreq_generic_init(policy, bcm2835_freq_table, transition_latency); -+} -+ -+/* -+ ===================================================================== -+ Target index function chooses the requested frequency from the table -+ ===================================================================== -+*/ -+ -+static int bcm2835_cpufreq_driver_target_index(struct cpufreq_policy *policy, unsigned int state) -+{ -+ unsigned int target_freq = bcm2835_freq_table[state].frequency; -+ unsigned int cur = bcm2835_cpufreq_set_clock(policy->cur, target_freq); -+ -+ if (!cur) -+ { -+ print_err("Error occurred setting a new frequency (%d)\n", target_freq); -+ return -EINVAL; -+ } -+ print_debug("%s: %i: freq %d->%d\n", policy->governor->name, state, policy->cur, cur); -+ return 0; -+} -+ -+/* -+ ====================================================== -+ Get function returns the current frequency from table -+ ====================================================== -+*/ -+ -+static unsigned int bcm2835_cpufreq_driver_get(unsigned int cpu) -+{ -+ unsigned int actual_rate = bcm2835_cpufreq_get_clock(VCMSG_GET_CLOCK_RATE); -+ print_debug("%d: freq=%d\n", cpu, actual_rate); -+ return actual_rate <= bcm2835_freq_table[0].frequency ? bcm2835_freq_table[0].frequency : bcm2835_freq_table[1].frequency; -+} -+ -+/* the CPUFreq driver */ -+static struct cpufreq_driver bcm2835_cpufreq_driver = { -+ .name = "BCM2835 CPUFreq", -+ .init = bcm2835_cpufreq_driver_init, -+ .verify = cpufreq_generic_frequency_table_verify, -+ .target_index = bcm2835_cpufreq_driver_target_index, -+ .get = bcm2835_cpufreq_driver_get, -+ .attr = cpufreq_generic_attr, -+}; -+ -+MODULE_AUTHOR("Dorian Peake and Dom Cobley"); -+MODULE_DESCRIPTION("CPU frequency driver for BCM2835 chip"); -+MODULE_LICENSE("GPL"); -+ -+module_init(bcm2835_cpufreq_module_init); -+module_exit(bcm2835_cpufreq_module_exit); |