@@ -275,6 +275,66 @@ static int tegra_pinctrl_set_mux(struct pinctrl_dev *pctldev,
return 0;
}
+static int tegra_pinctrl_gpio_save_config(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
+ const struct tegra_pingroup *g;
+ unsigned group, num_pins;
+ const unsigned *pins;
+ int ret;
+
+ for (group = 0; group < pmx->soc->ngroups; ++group) {
+ ret = tegra_pinctrl_get_group_pins(pctldev, group, &pins, &num_pins);
+ if (ret < 0 || num_pins != 1)
+ continue;
+ if (offset == pins[0])
+ break;
+ }
+
+ if (group == pmx->soc->ngroups) {
+ dev_err(pctldev->dev, "Pingroup not found for pin %u\n", offset);
+ return -EINVAL;
+ }
+
+ g = &pmx->soc->groups[group];
+ if (g->mux_reg >= 0)
+ pmx->gpio_conf[offset] = pmx_readl(pmx, g->mux_bank, g->mux_reg);
+
+ return 0;
+}
+
+static int tegra_pinctrl_gpio_restore_config(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
+ const struct tegra_pingroup *g;
+ unsigned group, num_pins;
+ const unsigned *pins;
+ int ret;
+
+ for (group = 0; group < pmx->soc->ngroups; ++group) {
+ ret = tegra_pinctrl_get_group_pins(pctldev, group, &pins, &num_pins);
+ if (ret < 0 || num_pins != 1)
+ continue;
+ if (offset == pins[0])
+ break;
+ }
+
+ if (group == pmx->soc->ngroups) {
+ dev_err(pctldev->dev, "Pingroup not found for pin %u\n", offset);
+ return -EINVAL;
+ }
+
+ g = &pmx->soc->groups[group];
+ if (g->mux_reg >= 0)
+ pmx_writel(pmx, pmx->gpio_conf[offset], g->mux_bank, g->mux_reg);
+
+ return 0;
+}
+
static int tegra_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int offset)
@@ -326,6 +386,8 @@ static const struct pinmux_ops tegra_pinmux_ops = {
.set_mux = tegra_pinctrl_set_mux,
.gpio_request_enable = tegra_pinctrl_gpio_request_enable,
.gpio_disable_free = tegra_pinctrl_gpio_disable_free,
+ .gpio_save_config = tegra_pinctrl_gpio_save_config,
+ .gpio_restore_config = tegra_pinctrl_gpio_restore_config,
};
static int tegra_pinconf_reg(struct tegra_pmx *pmx,
@@ -826,6 +888,10 @@ int tegra_pinctrl_probe(struct platform_device *pdev,
if (!pmx->backup_regs)
return -ENOMEM;
+ pmx->gpio_conf = devm_kzalloc(&pdev->dev, backup_regs_size, GFP_KERNEL);
+ if (!pmx->gpio_conf)
+ return -ENOMEM;
+
for (i = 0; i < pmx->nbanks; i++) {
pmx->regs[i] = devm_platform_ioremap_resource(pdev, i);
if (IS_ERR(pmx->regs[i]))
@@ -18,6 +18,7 @@ struct tegra_pmx {
int nbanks;
void __iomem **regs;
u32 *backup_regs;
+ u32 *gpio_conf;
};
enum tegra_pinconf_param {