From: "Andrii.Tseglytskyi" <andrii.tseglyts...@ti.com>
Patch adds debugfs entry for each ABB:
/sys/kernel/debug/<ABB device name>
This entry is read-only. It prints current state of ABB.
Signed-off-by: Andrii.Tseglytskyi <andrii.tseglyts...@ti.com>
---
drivers/regulator/abb-regulator.c | 74 ++++++++++++++++++++++++++++++++++++-
1 file changed, 73 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/abb-regulator.c
b/drivers/regulator/abb-regulator.c
index 5a828e2..dad517d 100644
--- a/drivers/regulator/abb-regulator.c
+++ b/drivers/regulator/abb-regulator.c
@@ -19,6 +19,7 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/opp.h>
+#include <linux/debugfs.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
@@ -440,6 +441,74 @@ static struct regulator_ops omap_abb_reg_ops = {
};
/*
+ * omap_abb_info_dump() - ABB debug dump
+ *
+ * Returns 0
+ */
+static int omap_abb_info_dump(struct seq_file *sf, void *unused)
+{
+ const struct omap_abb *abb = (struct omap_abb *)sf->private;
+ struct opp *opp;
+ u32 abb_ctrl, abb_setup;
+ unsigned long freq = 0;
+
+ if (!abb) {
+ seq_printf(sf, "No ABB defined\n");
+ goto err;
+ }
+
+ abb_ctrl = omap_abb_readl(abb, abb->data.control_offs);
+ abb_setup = omap_abb_readl(abb, abb->data.setup_offs);
+ 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",
+ !!(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);
+
+ 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, "Voltage (%lu) ABB (%lu)\n",
+ opp_get_freq(opp) / 1000,
+ opp_get_voltage(opp));
+
+ freq++;
+ } while (1);
+ rcu_read_unlock();
+
+err:
+ return 0;
+}
+
+/*
+ * omap_abb_fops_open() - debugfs "open" callback
+ *
+ * Returns 0 on success or error code otherwise
+ */
+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_init_timings() - Initialize ABB timings
* @abb: pointer to the ABB instance
*
@@ -507,7 +576,6 @@ static int __init omap_abb_init_timings(struct omap_abb
*abb)
clk_put(sys_clk);
return 0;
}
-
/*
* omap_abb_probe() - Initialize an ABB ldo instance
* @pdev: ABB platform device
@@ -615,6 +683,10 @@ static int __init omap_abb_probe(struct platform_device
*pdev)
if (IS_ERR(abb->supply_reg))
abb->supply_reg = NULL;
+ /* create debugfs entry */
+ debugfs_create_file(dev_name(&pdev->dev), S_IRUGO, NULL,
+ abb, &omap_abb_debug_fops);
+
return 0;
err:
--
1.7.9.5
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