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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
