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Message-ID: <1401295868-18697-2-git-send-email-pdeschrijver@nvidia.com>
Date: Wed, 28 May 2014 19:51:07 +0300
From: Peter De Schrijver <pdeschrijver@...dia.com>
To: Peter De Schrijver <pdeschrijver@...dia.com>
CC: Prashant Gaikwad <pgaikwad@...dia.com>,
Mike Turquette <mturquette@...aro.org>,
Stephen Warren <swarren@...dotorg.org>,
Thierry Reding <thierry.reding@...il.com>,
<linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>
Subject: [PATCH 1/2] clk: tegra: Add debugfs infrastructure
Add debugfs infrastructure for tegra clocks. In this phase a file 'regs' will
be created which clocktypes can use to dump the register(s) associated with
the clocks.
Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
---
drivers/clk/tegra/clk.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/clk/tegra/clk.h | 8 ++++++
2 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c
index c0a7d77..0fdd2d0 100644
--- a/drivers/clk/tegra/clk.c
+++ b/drivers/clk/tegra/clk.c
@@ -164,6 +164,65 @@ struct tegra_clk_periph_regs *get_reg_bank(int clkid)
}
}
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+static tegra_clk_debugfn **debug_show;
+
+static int tegra_clk_show(struct seq_file *s, void *data)
+{
+ int dt_id = (int)s->private;
+ struct clk_hw *hw = __clk_get_hw(clks[dt_id]);
+
+ if (debug_show && debug_show[dt_id])
+ return debug_show[dt_id](s, hw, clk_base);
+ else
+ return -EINVAL;
+}
+
+static int tegra_clk_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, tegra_clk_show, inode->i_private);
+}
+
+static const struct file_operations debug_fops = {
+ .open = tegra_clk_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+int tegra_clk_debug_init(struct clk_hw *hw, struct dentry *parent_dir,
+ tegra_clk_debugfn *show_debug)
+{
+ struct dentry *d;
+ int i;
+
+ for (i = 0; i < clk_num; i++)
+ if (clks[i] == hw->clk)
+ break;
+
+ if (i == clk_num)
+ return 0;
+
+ debug_show[i] = show_debug;
+
+ d = debugfs_create_file("regs", S_IRUGO, parent_dir, (void *)i,
+ &debug_fops);
+
+ return 0;
+}
+
+static void __init init_debug_show(int num)
+{
+ debug_show = kzalloc(num * sizeof(tegra_clk_debugfn *), GFP_KERNEL);
+}
+#else
+static void __init init_debug_show(int num)
+{
+}
+#endif
+
struct clk ** __init tegra_clk_init(void __iomem *regs, int num, int banks)
{
clk_base = regs;
@@ -184,6 +243,8 @@ struct clk ** __init tegra_clk_init(void __iomem *regs, int num, int banks)
clk_num = num;
+ init_debug_show(num);
+
return clks;
}
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index 16ec8d6..facbd99 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -20,6 +20,14 @@
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
+#ifdef CONFIG_DEBUG_FS
+typedef int tegra_clk_debugfn(struct seq_file *s, struct clk_hw *clk,
+ void __iomem *clk_base);
+
+int tegra_clk_debug_init(struct clk_hw *hw, struct dentry *parent_dir,
+ tegra_clk_debugfn *show_debug);
+#endif
+
/**
* struct tegra_clk_sync_source - external clock source from codec
*
--
1.7.7.rc0.72.g4b5ea.dirty
--
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