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Date: Wed, 11 Apr 2012 16:47:19 -0600
From: Stephen Warren <swarren@...dotorg.org>
To: Linus Walleij <linus.walleij@...aro.org>,
Olof Johansson <olof@...om.net>,
Colin Cross <ccross@...roid.com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-tegra@...r.kernel.org, Stephen Warren <swarren@...dia.com>
Subject: [PATCH] pinctrl: tegra: debugfs enhancements
From: Stephen Warren <swarren@...dia.com>
* Only provide debugfs-relates ops when CONFIG_DEBUG_FS is enabled.
* Implement pin_config_group_dbg_show op.
* Implement pin_config_config_dbg_show op.
Signed-off-by: Stephen Warren <swarren@...dia.com>
---
Linus, this too would be best to take through the Tegra tree. It depends
on the other two patches I just posted, but to satisfy that, I'll just
base my branch off of pinctrl once you've applied those branches and its
stable.
drivers/pinctrl/pinctrl-tegra.c | 75 +++++++++++++++++++++++++++++++++++---
1 files changed, 69 insertions(+), 6 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-tegra.c b/drivers/pinctrl/pinctrl-tegra.c
index 3ac8ad3..df52d75 100644
--- a/drivers/pinctrl/pinctrl-tegra.c
+++ b/drivers/pinctrl/pinctrl-tegra.c
@@ -83,12 +83,14 @@ static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
return 0;
}
+#ifdef CONFIG_DEBUG_FS
static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s,
unsigned offset)
{
seq_printf(s, " %s", dev_name(pctldev->dev));
}
+#endif
static int reserve_map(struct pinctrl_map **map, unsigned *reserved_maps,
unsigned *num_maps, unsigned reserve)
@@ -295,7 +297,9 @@ static struct pinctrl_ops tegra_pinctrl_ops = {
.get_groups_count = tegra_pinctrl_get_groups_count,
.get_group_name = tegra_pinctrl_get_group_name,
.get_group_pins = tegra_pinctrl_get_group_pins,
+#ifdef CONFIG_DEBUG_FS
.pin_dbg_show = tegra_pinctrl_pin_dbg_show,
+#endif
.dt_node_to_map = tegra_pinctrl_dt_node_to_map,
.dt_free_map = tegra_pinctrl_dt_free_map,
};
@@ -385,6 +389,7 @@ static struct pinmux_ops tegra_pinmux_ops = {
static int tegra_pinconf_reg(struct tegra_pmx *pmx,
const struct tegra_pingroup *g,
enum tegra_pinconf_param param,
+ bool report_err,
s8 *bank, s16 *reg, s8 *bit, s8 *width)
{
switch (param) {
@@ -472,9 +477,10 @@ static int tegra_pinconf_reg(struct tegra_pmx *pmx,
}
if (*reg < 0) {
- dev_err(pmx->dev,
- "Config param %04x not supported on group %s\n",
- param, g->name);
+ if (report_err)
+ dev_err(pmx->dev,
+ "Config param %04x not supported on group %s\n",
+ param, g->name);
return -ENOTSUPP;
}
@@ -507,7 +513,8 @@ static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev,
g = &pmx->soc->groups[group];
- ret = tegra_pinconf_reg(pmx, g, param, &bank, ®, &bit, &width);
+ ret = tegra_pinconf_reg(pmx, g, param, true, &bank, ®, &bit,
+ &width);
if (ret < 0)
return ret;
@@ -534,7 +541,8 @@ static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
g = &pmx->soc->groups[group];
- ret = tegra_pinconf_reg(pmx, g, param, &bank, ®, &bit, &width);
+ ret = tegra_pinconf_reg(pmx, g, param, true, &bank, ®, &bit,
+ &width);
if (ret < 0)
return ret;
@@ -563,23 +571,78 @@ static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
return 0;
}
+#ifdef CONFIG_DEBUG_FS
static void tegra_pinconf_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned offset)
{
}
+static const char *strip_prefix(const char *s)
+{
+ const char *comma = strchr(s, ',');
+ if (!comma)
+ return s;
+
+ return comma + 1;
+}
+
static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
- struct seq_file *s, unsigned selector)
+ struct seq_file *s, unsigned group)
+{
+ struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
+ const struct tegra_pingroup *g;
+ int i, ret;
+ s8 bank, bit, width;
+ s16 reg;
+ u32 val;
+
+ g = &pmx->soc->groups[group];
+
+ for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
+ ret = tegra_pinconf_reg(pmx, g, cfg_params[i].param, false,
+ &bank, ®, &bit, &width);
+ if (ret < 0)
+ continue;
+
+ val = pmx_readl(pmx, bank, reg);
+ val >>= bit;
+ val &= (1 << width) - 1;
+
+ seq_printf(s, "\n\t%s=%u",
+ strip_prefix(cfg_params[i].property), val);
+ }
+}
+
+static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s,
+ unsigned long config)
{
+ enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
+ u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
+ const char *pname = "unknown";
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
+ if (cfg_params[i].param == param) {
+ pname = cfg_params[i].property;
+ break;
+ }
+ }
+
+ seq_printf(s, "%s=%d", strip_prefix(pname), arg);
}
+#endif
struct pinconf_ops tegra_pinconf_ops = {
.pin_config_get = tegra_pinconf_get,
.pin_config_set = tegra_pinconf_set,
.pin_config_group_get = tegra_pinconf_group_get,
.pin_config_group_set = tegra_pinconf_group_set,
+#ifdef CONFIG_DEBUG_FS
.pin_config_dbg_show = tegra_pinconf_dbg_show,
.pin_config_group_dbg_show = tegra_pinconf_group_dbg_show,
+ .pin_config_config_dbg_show = tegra_pinconf_config_dbg_show,
+#endif
};
static struct pinctrl_gpio_range tegra_pinctrl_gpio_range = {
--
1.7.0.4
--
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