From: sboyd@codeaurora.org (Stephen Boyd)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 12/22] msm: clock: Add list_rate debugfs nodes for locally-controlled clocks
Date: Thu, 16 Dec 2010 16:49:56 -0800 [thread overview]
Message-ID: <1292547006-19741-13-git-send-email-sboyd@codeaurora.org> (raw)
In-Reply-To: <1292547006-19741-1-git-send-email-sboyd@codeaurora.org>
From: Matt Wagantall <mattw@codeaurora.org>
Add debugfs nodes to list all of the supported rates for rate-settable
locally-controlled clocks. This allows a clock's supported rates to
be queried from userspace, and allows more comprehensive userspace
clock tests to be developed.
Reviewed-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
arch/arm/mach-msm/clock-7x30.c | 1 +
arch/arm/mach-msm/clock-8x60.c | 1 +
arch/arm/mach-msm/clock-debug.c | 31 +++++++++++++++++++++++++++++++
arch/arm/mach-msm/clock-local.c | 11 +++++++++++
arch/arm/mach-msm/clock-local.h | 1 +
arch/arm/mach-msm/clock.h | 1 +
6 files changed, 46 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-msm/clock-7x30.c b/arch/arm/mach-msm/clock-7x30.c
index e13de24..9e73d8a 100644
--- a/arch/arm/mach-msm/clock-7x30.c
+++ b/arch/arm/mach-msm/clock-7x30.c
@@ -1156,6 +1156,7 @@ struct clk_ops soc_clk_ops_7x30 = {
.set_min_rate = local_clk_set_min_rate,
.set_max_rate = local_clk_set_max_rate,
.get_rate = local_clk_get_rate,
+ .list_rate = local_clk_list_rate,
.is_enabled = local_clk_is_enabled,
.round_rate = local_clk_round_rate,
.reset = pc_clk_reset,
diff --git a/arch/arm/mach-msm/clock-8x60.c b/arch/arm/mach-msm/clock-8x60.c
index 6972001..28017b7 100644
--- a/arch/arm/mach-msm/clock-8x60.c
+++ b/arch/arm/mach-msm/clock-8x60.c
@@ -1895,6 +1895,7 @@ struct clk_ops soc_clk_ops_8x60 = {
.set_min_rate = local_clk_set_min_rate,
.set_max_rate = local_clk_set_max_rate,
.get_rate = local_clk_get_rate,
+ .list_rate = local_clk_list_rate,
.is_enabled = local_clk_is_enabled,
.round_rate = local_clk_round_rate,
.reset = soc_clk_reset,
diff --git a/arch/arm/mach-msm/clock-debug.c b/arch/arm/mach-msm/clock-debug.c
index 73ef9cc..354bc1e 100644
--- a/arch/arm/mach-msm/clock-debug.c
+++ b/arch/arm/mach-msm/clock-debug.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <linux/clk.h>
#include "clock.h"
@@ -106,6 +107,32 @@ int __init clock_debug_init(void)
return 0;
}
+static int list_rates_show(struct seq_file *m, void *unused)
+{
+ struct clk *clock = m->private;
+ int rate, i = 0;
+
+ if (clock->ops->list_rate == NULL)
+ return -EINVAL;
+
+ while ((rate = clock->ops->list_rate(clock->id, i++)) >= 0)
+ seq_printf(m, "%d\n", rate);
+
+ return 0;
+}
+
+static int list_rates_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, list_rates_show, inode->i_private);
+}
+
+static const struct file_operations list_rates_fops = {
+ .open = list_rates_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
int __init clock_debug_add(struct clk *clock)
{
char temp[50], *ptr;
@@ -138,6 +165,10 @@ int __init clock_debug_add(struct clk *clock)
clock, &clock_measure_fops))
goto error;
+ if (!debugfs_create_file("list_rates", S_IRUGO, clk_dir,
+ clock, &list_rates_fops))
+ goto error;
+
return 0;
error:
debugfs_remove_recursive(clk_dir);
diff --git a/arch/arm/mach-msm/clock-local.c b/arch/arm/mach-msm/clock-local.c
index 44e0778..f80efa6 100644
--- a/arch/arm/mach-msm/clock-local.c
+++ b/arch/arm/mach-msm/clock-local.c
@@ -682,3 +682,14 @@ bool local_clk_is_local(unsigned id)
{
return true;
}
+
+/* Return the nth supported frequency for a given clock. */
+int local_clk_list_rate(unsigned id, unsigned n)
+{
+ struct clk_local *clk = &soc_clk_local_tbl[id];
+
+ if (!clk->freq_tbl || clk->freq_tbl->freq_hz == FREQ_END)
+ return -ENXIO;
+
+ return (clk->freq_tbl + n)->freq_hz;
+}
diff --git a/arch/arm/mach-msm/clock-local.h b/arch/arm/mach-msm/clock-local.h
index 3083369..cf97219 100644
--- a/arch/arm/mach-msm/clock-local.h
+++ b/arch/arm/mach-msm/clock-local.h
@@ -209,6 +209,7 @@ int local_clk_set_rate(unsigned id, unsigned rate);
int local_clk_set_min_rate(unsigned id, unsigned rate);
int local_clk_set_max_rate(unsigned id, unsigned rate);
unsigned local_clk_get_rate(unsigned id);
+int local_clk_list_rate(unsigned id, unsigned n);
unsigned local_clk_is_enabled(unsigned id);
long local_clk_round_rate(unsigned id, unsigned rate);
bool local_clk_is_local(unsigned id);
diff --git a/arch/arm/mach-msm/clock.h b/arch/arm/mach-msm/clock.h
index f09e01b..67f9d9e 100644
--- a/arch/arm/mach-msm/clock.h
+++ b/arch/arm/mach-msm/clock.h
@@ -41,6 +41,7 @@ struct clk_ops {
int (*set_max_rate)(unsigned id, unsigned rate);
int (*set_flags)(unsigned id, unsigned flags);
unsigned (*get_rate)(unsigned id);
+ int (*list_rate)(unsigned id, unsigned n);
int (*measure_rate)(unsigned id);
unsigned (*is_enabled)(unsigned id);
long (*round_rate)(unsigned id, unsigned rate);
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
next prev parent reply other threads:[~2010-12-17 0:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-17 0:49 [PATCH 00/22] MSM clock driver updates Stephen Boyd
2010-12-17 0:49 ` [PATCH 01/22] msm: clock: Remove unused code and definitions Stephen Boyd
2010-12-17 0:49 ` [PATCH 02/22] msm: clock: Move debugfs code from clock.c to clock-debug.c Stephen Boyd
2010-12-17 0:49 ` [PATCH 03/22] msm: clock: Invert debugfs directory layout Stephen Boyd
2010-12-17 0:49 ` [PATCH 04/22] msm: clock: Add support for more proc_comm clocks Stephen Boyd
2010-12-17 0:49 ` [PATCH 05/22] msm: clock-7x30: Add 7x30 local clock driver Stephen Boyd
2010-12-17 0:49 ` [PATCH 06/22] msm: clock-7x30: Update clock table Stephen Boyd
2010-12-17 0:49 ` [PATCH 07/22] msm: clock: Refactor clock-7x30 into generic clock-local driver Stephen Boyd
2010-12-17 0:49 ` [PATCH 08/22] msm: clock-8x60: Add msm8x60 local clock driver Stephen Boyd
2010-12-17 0:49 ` [PATCH 09/22] msm: clock: Remove references to clk_ops_pcom Stephen Boyd
2010-12-17 0:49 ` [PATCH 10/22] msm: Move 8x60 to the real clock driver Stephen Boyd
2010-12-17 0:49 ` [PATCH 11/22] msm: clock Add debugfs interface to measure clock rates Stephen Boyd
2010-12-17 0:49 ` Stephen Boyd [this message]
2010-12-17 0:49 ` [PATCH 13/22] msm: clock: Push down clock count and locking into sub drivers Stephen Boyd
2010-12-17 0:49 ` [PATCH 14/22] msm: clock: Support clk_set_parent() clk_ops Stephen Boyd
2010-12-17 0:49 ` [PATCH 15/22] msm: clock-pcom: Add pbus specific clock ops Stephen Boyd
2010-12-17 0:50 ` [PATCH 16/22] msm: clock: Implement rate voting Stephen Boyd
2010-12-17 0:50 ` [PATCH 17/22] msm: Migrate to clock " Stephen Boyd
2010-12-17 0:50 ` [PATCH 18/22] msm: clock: Migrate to clkdev Stephen Boyd
2010-12-17 0:50 ` [PATCH 19/22] msm: iommu: Add bus clocks to platform data Stephen Boyd
2010-12-17 0:50 ` [PATCH 20/22] msm: iommu: Clock control for the IOMMU driver Stephen Boyd
2010-12-17 0:50 ` [PATCH 21/22] msm: iommu: Rework clock logic and add IOMMU bus clock control Stephen Boyd
2010-12-17 0:50 ` [PATCH 22/22] msm: clock-8x60: Don't keep IOMMU clocks on at boot Stephen Boyd
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