From: Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
To: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
konkers-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org,
olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org,
Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>,
Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 18/21] ARM: tegra: cpufreq: Adjust memory frequency with cpu frequency
Date: Sun, 13 Feb 2011 01:40:30 -0800 [thread overview]
Message-ID: <1297590033-15035-19-git-send-email-ccross@android.com> (raw)
In-Reply-To: <1297590033-15035-1-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
Signed-off-by: Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
---
arch/arm/mach-tegra/cpu-tegra.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
index f02ba60..0e1016a 100644
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ b/arch/arm/mach-tegra/cpu-tegra.c
@@ -51,6 +51,7 @@ static struct cpufreq_frequency_table freq_table[] = {
#define NUM_CPUS 2
static struct clk *cpu_clk;
+static struct clk *emc_clk;
static unsigned long target_cpu_speed[NUM_CPUS];
static DEFINE_MUTEX(tegra_cpu_lock);
@@ -83,6 +84,17 @@ static int tegra_update_cpu_speed(unsigned long rate)
if (freqs.old == freqs.new)
return ret;
+ /*
+ * Vote on memory bus frequency based on cpu frequency
+ * This sets the minimum frequency, display or avp may request higher
+ */
+ if (rate >= 816000)
+ clk_set_rate(emc_clk, 600000000); /* cpu 816 MHz, emc max */
+ else if (rate >= 456000)
+ clk_set_rate(emc_clk, 300000000); /* cpu 456 MHz, emc 150Mhz */
+ else
+ clk_set_rate(emc_clk, 100000000); /* emc 50Mhz */
+
for_each_online_cpu(freqs.cpu)
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
@@ -173,6 +185,13 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
+ emc_clk = clk_get_sys("cpu", "emc");
+ if (IS_ERR(emc_clk)) {
+ clk_put(cpu_clk);
+ return PTR_ERR(emc_clk);
+ }
+
+ clk_enable(emc_clk);
clk_enable(cpu_clk);
cpufreq_frequency_table_cpuinfo(policy, freq_table);
@@ -195,6 +214,8 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
static int tegra_cpu_exit(struct cpufreq_policy *policy)
{
cpufreq_frequency_table_cpuinfo(policy, freq_table);
+ clk_disable(emc_clk);
+ clk_put(emc_clk);
clk_put(cpu_clk);
return 0;
}
--
1.7.3.1
--
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WARNING: multiple messages have this Message-ID (diff)
From: ccross@android.com (Colin Cross)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 18/21] ARM: tegra: cpufreq: Adjust memory frequency with cpu frequency
Date: Sun, 13 Feb 2011 01:40:30 -0800 [thread overview]
Message-ID: <1297590033-15035-19-git-send-email-ccross@android.com> (raw)
In-Reply-To: <1297590033-15035-1-git-send-email-ccross@android.com>
Signed-off-by: Colin Cross <ccross@android.com>
---
arch/arm/mach-tegra/cpu-tegra.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
index f02ba60..0e1016a 100644
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ b/arch/arm/mach-tegra/cpu-tegra.c
@@ -51,6 +51,7 @@ static struct cpufreq_frequency_table freq_table[] = {
#define NUM_CPUS 2
static struct clk *cpu_clk;
+static struct clk *emc_clk;
static unsigned long target_cpu_speed[NUM_CPUS];
static DEFINE_MUTEX(tegra_cpu_lock);
@@ -83,6 +84,17 @@ static int tegra_update_cpu_speed(unsigned long rate)
if (freqs.old == freqs.new)
return ret;
+ /*
+ * Vote on memory bus frequency based on cpu frequency
+ * This sets the minimum frequency, display or avp may request higher
+ */
+ if (rate >= 816000)
+ clk_set_rate(emc_clk, 600000000); /* cpu 816 MHz, emc max */
+ else if (rate >= 456000)
+ clk_set_rate(emc_clk, 300000000); /* cpu 456 MHz, emc 150Mhz */
+ else
+ clk_set_rate(emc_clk, 100000000); /* emc 50Mhz */
+
for_each_online_cpu(freqs.cpu)
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
@@ -173,6 +185,13 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
+ emc_clk = clk_get_sys("cpu", "emc");
+ if (IS_ERR(emc_clk)) {
+ clk_put(cpu_clk);
+ return PTR_ERR(emc_clk);
+ }
+
+ clk_enable(emc_clk);
clk_enable(cpu_clk);
cpufreq_frequency_table_cpuinfo(policy, freq_table);
@@ -195,6 +214,8 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
static int tegra_cpu_exit(struct cpufreq_policy *policy)
{
cpufreq_frequency_table_cpuinfo(policy, freq_table);
+ clk_disable(emc_clk);
+ clk_put(emc_clk);
clk_put(cpu_clk);
return 0;
}
--
1.7.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Colin Cross <ccross@android.com>
To: linux-tegra@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, konkers@android.com,
olof@lixom.net, Colin Cross <ccross@android.com>,
Russell King <linux@arm.linux.org.uk>,
linux-kernel@vger.kernel.org
Subject: [PATCH 18/21] ARM: tegra: cpufreq: Adjust memory frequency with cpu frequency
Date: Sun, 13 Feb 2011 01:40:30 -0800 [thread overview]
Message-ID: <1297590033-15035-19-git-send-email-ccross@android.com> (raw)
In-Reply-To: <1297590033-15035-1-git-send-email-ccross@android.com>
Signed-off-by: Colin Cross <ccross@android.com>
---
arch/arm/mach-tegra/cpu-tegra.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
index f02ba60..0e1016a 100644
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ b/arch/arm/mach-tegra/cpu-tegra.c
@@ -51,6 +51,7 @@ static struct cpufreq_frequency_table freq_table[] = {
#define NUM_CPUS 2
static struct clk *cpu_clk;
+static struct clk *emc_clk;
static unsigned long target_cpu_speed[NUM_CPUS];
static DEFINE_MUTEX(tegra_cpu_lock);
@@ -83,6 +84,17 @@ static int tegra_update_cpu_speed(unsigned long rate)
if (freqs.old == freqs.new)
return ret;
+ /*
+ * Vote on memory bus frequency based on cpu frequency
+ * This sets the minimum frequency, display or avp may request higher
+ */
+ if (rate >= 816000)
+ clk_set_rate(emc_clk, 600000000); /* cpu 816 MHz, emc max */
+ else if (rate >= 456000)
+ clk_set_rate(emc_clk, 300000000); /* cpu 456 MHz, emc 150Mhz */
+ else
+ clk_set_rate(emc_clk, 100000000); /* emc 50Mhz */
+
for_each_online_cpu(freqs.cpu)
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
@@ -173,6 +185,13 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
+ emc_clk = clk_get_sys("cpu", "emc");
+ if (IS_ERR(emc_clk)) {
+ clk_put(cpu_clk);
+ return PTR_ERR(emc_clk);
+ }
+
+ clk_enable(emc_clk);
clk_enable(cpu_clk);
cpufreq_frequency_table_cpuinfo(policy, freq_table);
@@ -195,6 +214,8 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
static int tegra_cpu_exit(struct cpufreq_policy *policy)
{
cpufreq_frequency_table_cpuinfo(policy, freq_table);
+ clk_disable(emc_clk);
+ clk_put(emc_clk);
clk_put(cpu_clk);
return 0;
}
--
1.7.3.1
next prev parent reply other threads:[~2011-02-13 9:40 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-13 9:40 [PATCH 00/21] Tegra clock updates for 2.6.39 Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 04/21] ARM: tegra: clock: Don't use PLL lock bits Colin Cross
2011-02-13 9:40 ` Colin Cross
[not found] ` <1297590033-15035-1-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2011-02-13 9:40 ` [PATCH 01/21] ARM: tegra: clock: enable clk reset for non-peripheral clocks Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 02/21] ARM: tegra: clock: Don't BUG on changing an enabled PLL Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 03/21] ARM: tegra: clock: Drop debugging Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 05/21] ARM: tegra: clock: Disable clocks left on by bootloader Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 06/21] ARM: tegra: clock: Initialize clocks that have no enable Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 07/21] ARM: tegra: clock: Drop CPU dvfs Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 08/21] ARM: tegra: clock: Rearrange static clock tables Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 09/21] ARM: tegra: clock: Move unshared clk struct members into union Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 10/21] ARM: tegra: clock: Convert global lock to a lock per clock Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 11/21] ARM: tegra: cpufreq: Take an extra reference to pllx Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 12/21] ARM: tegra: clock: Add shared bus clock type Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
[not found] ` <1297590033-15035-13-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2011-02-16 20:34 ` Stephen Boyd
2011-02-16 20:34 ` Stephen Boyd
2011-02-16 20:34 ` Stephen Boyd
[not found] ` <4D5C34E0.5000209-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2011-02-16 21:01 ` Colin Cross
2011-02-16 21:01 ` Colin Cross
2011-02-16 21:01 ` Colin Cross
[not found] ` <AANLkTi=knKY65xaOT85jFidy6Be8K8RT0L1XtGqq_v2V-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-02-16 21:51 ` Stephen Boyd
2011-02-16 21:51 ` Stephen Boyd
2011-02-16 21:51 ` Stephen Boyd
[not found] ` <4D5C46D7.1040903-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2011-02-16 22:03 ` Colin Cross
2011-02-16 22:03 ` Colin Cross
2011-02-16 22:03 ` Colin Cross
2011-02-13 9:40 ` [PATCH 13/21] ARM: tegra: clock: Remove unnecessary uses of #ifdef CONFIG_DEBUG_FS Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 14/21] ARM: tegra: clock: Refcount periph clock enables Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 16/21] ARM: tegra: Add external memory controller driver Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross [this message]
2011-02-13 9:40 ` [PATCH 18/21] ARM: tegra: cpufreq: Adjust memory frequency with cpu frequency Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 19/21] ARM: tegra: clock: Add function to set SDMMC tap delay Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 20/21] ARM: tegra: clock: Fix clock issues in suspend Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 15/21] ARM: tegra: clock: Round rate before setting rate Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 17/21] ARM: tegra: clocks: Add emc scaling Colin Cross
2011-02-13 9:40 ` Colin Cross
2011-02-13 9:40 ` [PATCH 21/21] ARM: tegra: clock: Miscellaneous clock updates Colin Cross
2011-02-13 9:40 ` Colin Cross
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