On 02/05/16 13:17, Laxman Dewangan wrote:

NVIDIA Tegra210 supports the IO pads which can operate at 1.8V
or 3.3V I/O voltage levels. Also the IO pads can be configured
for power down state if it is not used. SW needs to configure the
voltage level of IO pads based on IO rail voltage and its power
state based on platform usage.

The voltage and power state configurations of pads are provided
through pin control frameworks. Add pin control driver for Tegra's
IO pads' voltage and power state configurations.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>

---
Changes from V1:
- Use the generic pincontrol property for low power enable/disable.
- sync with latest and remove all MODULE* macros
- Use renamed APIs form PMC
---
 drivers/pinctrl/tegra/Makefile                  |   1 +
 drivers/pinctrl/tegra/pinctrl-tegra210-io-pad.c | 301 ++++++++++++++++++++++++
 2 files changed, 302 insertions(+)
 create mode 100644 drivers/pinctrl/tegra/pinctrl-tegra210-io-pad.c

[snip]

+static int tegra_io_pad_pinconf_get(struct pinctrl_dev *pctldev,
+				    unsigned int pin, unsigned long *config)
+{
+	struct tegra_io_pads_info *tiopi = pinctrl_dev_get_drvdata(pctldev);
+	int param = pinconf_to_config_param(*config);
+	struct tegra_io_pads_cfg_info *pad_cfg = &tiopi->pads_cfg[pin];
+	int pad_id = pad_cfg->pad_id;
+	int arg = 0;
+	int ret;
+
+	switch (param) {
+	case TEGRA_IO_PAD_POWER_SOURCE_VOLTAGE:
+		ret = tegra_io_pads_get_configured_voltage(pad_id);
+		if (ret < 0)
+			return ret;
+		arg = (ret =  3300000) ? 1 : 0;

This should be (ret == 3300000).

Cheers
Jon