From: "Andrii.Tseglytskyi" <andrii.tseglytskyi@xxxxxx>
Patch adds debugfs entry for each ABB:
/sys/kernel/debug/<ABB device name>
This entry is read-only. It prints current state of ABB.
Cc: Mike Turquette <mturquette@xxxxxxxxxx>
Cc: Tero Kristo <t-kristo@xxxxxx>
Cc: Nishanth Menon <nm@xxxxxx>
Cc: "Benoît Cousson" <b-cousson@xxxxxx>
Cc: linux-omap@xxxxxxxxxxxxxxx
Signed-off-by: Andrii.Tseglytskyi <andrii.tseglytskyi@xxxxxx>
---
drivers/power/avs/abb.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/drivers/power/avs/abb.c b/drivers/power/avs/abb.c
index f5bbb8d..ac43841 100644
--- a/drivers/power/avs/abb.c
+++ b/drivers/power/avs/abb.c
@@ -19,6 +19,7 @@
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/opp.h>
+#include <linux/debugfs.h>
/* NOMINAL_OPP bypasses the ABB ldo, FAST_OPP sets it to Forward Body-Bias */
#define OMAP_ABB_NOMINAL_OPP 0
@@ -410,6 +411,66 @@ static const struct of_device_id __initdata omap_abb_of_match[] = {
MODULE_DEVICE_TABLE(of, omap_abb_of_match);
#endif
+static int omap_abb_info_dump(struct seq_file *sf, void *unused)
+{
+ struct opp *opp;
+ struct omap_abb *abb = (struct omap_abb *)sf->private;
+ u32 abb_ctrl, abb_setup, rate;
+ unsigned long freq = 0;
+
+ if (!abb) {
+ seq_printf(sf, "No ABB defined\n");
+ goto out;
+ }
+
+ abb_ctrl = omap_abb_readl(abb, abb->data.control_offs);
+ abb_setup = omap_abb_readl(abb, abb->data.setup_offs);
+ rate = clk_get_rate(abb->notify_clk);
+ seq_printf(sf, "Enabled\t->\t%d\n"
+ "opp_sel\t->\t%u\n"
+ "FBB mode\t->\t%u\n"
+ "RBB mode\t->\t%u\n"
+ "PRM_LDO_ABB_XXX_SETUP\t->\t0x%08x\n"
+ "PRM_LDO_ABB_XXX_CTRL\t->\t0x%08x\n"
+ "Notify clk\t->\t(%s) rate (%u)\n",
+ !!(abb_setup & abb->data.sr2en_mask),
+ abb->opp_sel,
+ !!(abb_setup & abb->data.fbb_sel_mask),
+ !!(abb_setup & abb->data.rbb_sel_mask),
+ abb_setup,
+ abb_ctrl,
+ __clk_get_name(abb->notify_clk), rate);
+
+ seq_printf(sf, "OPP table\n");
+ rcu_read_lock();
+ do {
+ opp = opp_find_freq_ceil(abb->dev, &freq);
+ if (IS_ERR(opp))
+ break;
+
+ seq_printf(sf, "Freq (%lu) ABB (%lu)\n", opp_get_freq(opp),
+ opp_get_voltage(opp));
+
+ freq++;
+ } while (1);
+ rcu_read_unlock();
+
+out:
+ return 0;
+}
+
+static int omap_abb_fops_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, omap_abb_info_dump, inode->i_private);
+}
+
+static const struct file_operations omap_abb_debug_fops = {
+ .open = omap_abb_fops_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/*
* omap_abb_probe() - Initialize an ABB ldo instance
* @pdev: ABB platform device
@@ -544,6 +605,9 @@ static int __init omap_abb_probe(struct platform_device *pdev)
omap_abb_rmw(abb, abb->data.sr2en_mask,
abb->data.sr2en_mask, abb->data.setup_offs);
+ debugfs_create_file(dev_name(abb->dev), S_IRUGO, NULL,
+ abb, &omap_abb_debug_fops);
+
clk_put(sys_clk);
return 0;
--
1.7.9.5
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