#include <linux/device.h>
#include <linux/of.h>
#include <linux/pse-pd/pse.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
static DEFINE_MUTEX(pse_list_mutex);
static LIST_HEAD(pse_controller_list);
* struct pse_control - a PSE control
* @pcdev: a pointer to the PSE controller device
* this PSE control belongs to
+ * @ps: PSE PI supply of the PSE control
* @list: list entry for the pcdev's PSE controller list
* @id: ID of the PSE line in the PSE controller device
* @refcnt: Number of gets of this pse_control
*/
struct pse_control {
struct pse_controller_dev *pcdev;
+ struct regulator *ps;
struct list_head list;
unsigned int id;
struct kref refcnt;
if (!np)
return -ENODEV;
+ pcdev->pi = kcalloc(pcdev->nr_lines, sizeof(*pcdev->pi), GFP_KERNEL);
+ if (!pcdev->pi)
+ return -ENOMEM;
+
pis = of_get_child_by_name(np, "pse-pis");
if (!pis) {
/* no description of PSE PIs */
return 0;
}
- pcdev->pi = kcalloc(pcdev->nr_lines, sizeof(*pcdev->pi), GFP_KERNEL);
- if (!pcdev->pi) {
- of_node_put(pis);
- return -ENOMEM;
- }
-
for_each_child_of_node(pis, node) {
struct pse_pi pi = {0};
u32 id;
return ret;
}
+static int pse_pi_is_enabled(struct regulator_dev *rdev)
+{
+ struct pse_controller_dev *pcdev = rdev_get_drvdata(rdev);
+ const struct pse_controller_ops *ops;
+ int id, ret;
+
+ ops = pcdev->ops;
+ if (!ops->pi_is_enabled)
+ return -EOPNOTSUPP;
+
+ id = rdev_get_id(rdev);
+ mutex_lock(&pcdev->lock);
+ ret = ops->pi_is_enabled(pcdev, id);
+ mutex_unlock(&pcdev->lock);
+
+ return ret;
+}
+
+static int pse_pi_enable(struct regulator_dev *rdev)
+{
+ struct pse_controller_dev *pcdev = rdev_get_drvdata(rdev);
+ const struct pse_controller_ops *ops;
+ int id, ret;
+
+ ops = pcdev->ops;
+ if (!ops->pi_enable)
+ return -EOPNOTSUPP;
+
+ id = rdev_get_id(rdev);
+ mutex_lock(&pcdev->lock);
+ ret = ops->pi_enable(pcdev, id);
+ if (!ret)
+ pcdev->pi[id].admin_state_enabled = 1;
+ mutex_unlock(&pcdev->lock);
+
+ return ret;
+}
+
+static int pse_pi_disable(struct regulator_dev *rdev)
+{
+ struct pse_controller_dev *pcdev = rdev_get_drvdata(rdev);
+ const struct pse_controller_ops *ops;
+ int id, ret;
+
+ ops = pcdev->ops;
+ if (!ops->pi_disable)
+ return -EOPNOTSUPP;
+
+ id = rdev_get_id(rdev);
+ mutex_lock(&pcdev->lock);
+ ret = ops->pi_disable(pcdev, id);
+ if (!ret)
+ pcdev->pi[id].admin_state_enabled = 0;
+ mutex_unlock(&pcdev->lock);
+
+ return ret;
+}
+
+static const struct regulator_ops pse_pi_ops = {
+ .is_enabled = pse_pi_is_enabled,
+ .enable = pse_pi_enable,
+ .disable = pse_pi_disable,
+};
+
+static int
+devm_pse_pi_regulator_register(struct pse_controller_dev *pcdev,
+ char *name, int id)
+{
+ struct regulator_init_data *rinit_data;
+ struct regulator_config rconfig = {0};
+ struct regulator_desc *rdesc;
+ struct regulator_dev *rdev;
+
+ rinit_data = devm_kzalloc(pcdev->dev, sizeof(*rinit_data),
+ GFP_KERNEL);
+ if (!rinit_data)
+ return -ENOMEM;
+
+ rdesc = devm_kzalloc(pcdev->dev, sizeof(*rdesc), GFP_KERNEL);
+ if (!rdesc)
+ return -ENOMEM;
+
+ /* Regulator descriptor id have to be the same as its associated
+ * PSE PI id for the well functioning of the PSE controls.
+ */
+ rdesc->id = id;
+ rdesc->name = name;
+ rdesc->type = REGULATOR_CURRENT;
+ rdesc->ops = &pse_pi_ops;
+ rdesc->owner = pcdev->owner;
+
+ rinit_data->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
+ rinit_data->supply_regulator = "vpwr";
+
+ rconfig.dev = pcdev->dev;
+ rconfig.driver_data = pcdev;
+ rconfig.init_data = rinit_data;
+
+ rdev = devm_regulator_register(pcdev->dev, rdesc, &rconfig);
+ if (IS_ERR(rdev)) {
+ dev_err_probe(pcdev->dev, PTR_ERR(rdev),
+ "Failed to register regulator\n");
+ return PTR_ERR(rdev);
+ }
+
+ pcdev->pi[id].rdev = rdev;
+
+ return 0;
+}
+
/**
* pse_controller_register - register a PSE controller device
* @pcdev: a pointer to the initialized PSE controller device
*/
int pse_controller_register(struct pse_controller_dev *pcdev)
{
- int ret;
+ size_t reg_name_len;
+ int ret, i;
mutex_init(&pcdev->lock);
INIT_LIST_HEAD(&pcdev->pse_control_head);
return ret;
}
+ /* Each regulator name len is pcdev dev name + 7 char +
+ * int max digit number (10) + 1
+ */
+ reg_name_len = strlen(dev_name(pcdev->dev)) + 18;
+
+ /* Register PI regulators */
+ for (i = 0; i < pcdev->nr_lines; i++) {
+ char *reg_name;
+
+ /* Do not register regulator for PIs not described */
+ if (!pcdev->no_of_pse_pi && !pcdev->pi[i].np)
+ continue;
+
+ reg_name = devm_kzalloc(pcdev->dev, reg_name_len, GFP_KERNEL);
+ if (!reg_name)
+ return -ENOMEM;
+
+ snprintf(reg_name, reg_name_len, "pse-%s_pi%d",
+ dev_name(pcdev->dev), i);
+
+ ret = devm_pse_pi_regulator_register(pcdev, reg_name, i);
+ if (ret)
+ return ret;
+ }
+
mutex_lock(&pse_list_mutex);
list_add(&pcdev->list, &pse_controller_list);
mutex_unlock(&pse_list_mutex);
lockdep_assert_held(&pse_list_mutex);
+ if (psec->pcdev->pi[psec->id].admin_state_enabled)
+ regulator_disable(psec->ps);
+ devm_regulator_put(psec->ps);
+
module_put(psec->pcdev->owner);
list_del(&psec->list);
pse_control_get_internal(struct pse_controller_dev *pcdev, unsigned int index)
{
struct pse_control *psec;
+ int ret;
lockdep_assert_held(&pse_list_mutex);
return ERR_PTR(-ENOMEM);
if (!try_module_get(pcdev->owner)) {
- kfree(psec);
- return ERR_PTR(-ENODEV);
+ ret = -ENODEV;
+ goto free_psec;
}
+ psec->ps = devm_regulator_get_exclusive(pcdev->dev,
+ rdev_get_name(pcdev->pi[index].rdev));
+ if (IS_ERR(psec->ps)) {
+ ret = PTR_ERR(psec->ps);
+ goto put_module;
+ }
+
+ ret = regulator_is_enabled(psec->ps);
+ if (ret < 0)
+ goto regulator_put;
+
+ pcdev->pi[index].admin_state_enabled = ret;
+
psec->pcdev = pcdev;
list_add(&psec->list, &pcdev->pse_control_head);
psec->id = index;
kref_init(&psec->refcnt);
return psec;
+
+regulator_put:
+ devm_regulator_put(psec->ps);
+put_module:
+ module_put(pcdev->owner);
+free_psec:
+ kfree(psec);
+
+ return ERR_PTR(ret);
}
/**
}
EXPORT_SYMBOL_GPL(pse_ethtool_get_status);
+static int pse_ethtool_c33_set_config(struct pse_control *psec,
+ const struct pse_control_config *config)
+{
+ int err = 0;
+
+ /* Look at admin_state_enabled status to not call regulator_enable
+ * or regulator_disable twice creating a regulator counter mismatch
+ */
+ switch (config->c33_admin_control) {
+ case ETHTOOL_C33_PSE_ADMIN_STATE_ENABLED:
+ if (!psec->pcdev->pi[psec->id].admin_state_enabled)
+ err = regulator_enable(psec->ps);
+ break;
+ case ETHTOOL_C33_PSE_ADMIN_STATE_DISABLED:
+ if (psec->pcdev->pi[psec->id].admin_state_enabled)
+ err = regulator_disable(psec->ps);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ }
+
+ return err;
+}
+
+static int pse_ethtool_podl_set_config(struct pse_control *psec,
+ const struct pse_control_config *config)
+{
+ int err = 0;
+
+ /* Look at admin_state_enabled status to not call regulator_enable
+ * or regulator_disable twice creating a regulator counter mismatch
+ */
+ switch (config->podl_admin_control) {
+ case ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED:
+ if (!psec->pcdev->pi[psec->id].admin_state_enabled)
+ err = regulator_enable(psec->ps);
+ break;
+ case ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED:
+ if (psec->pcdev->pi[psec->id].admin_state_enabled)
+ err = regulator_disable(psec->ps);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ }
+
+ return err;
+}
+
/**
* pse_ethtool_set_config - set PSE control configuration
* @psec: PSE control pointer
struct netlink_ext_ack *extack,
const struct pse_control_config *config)
{
- const struct pse_controller_ops *ops;
- int err;
-
- ops = psec->pcdev->ops;
+ int err = 0;
- if (!ops->ethtool_set_config) {
- NL_SET_ERR_MSG(extack,
- "PSE driver does not configuration");
- return -EOPNOTSUPP;
+ if (pse_has_c33(psec)) {
+ err = pse_ethtool_c33_set_config(psec, config);
+ if (err)
+ return err;
}
- mutex_lock(&psec->pcdev->lock);
- err = ops->ethtool_set_config(psec->pcdev, psec->id, extack, config);
- mutex_unlock(&psec->pcdev->lock);
+ if (pse_has_podl(psec))
+ err = pse_ethtool_podl_set_config(psec, config);
return err;
}
}
static int
-pse_reg_ethtool_set_config(struct pse_controller_dev *pcdev, unsigned long id,
- struct netlink_ext_ack *extack,
- const struct pse_control_config *config)
+pse_reg_pi_enable(struct pse_controller_dev *pcdev, int id)
{
struct pse_reg_priv *priv = to_pse_reg(pcdev);
int ret;
- if (priv->admin_state == config->podl_admin_control)
- return 0;
-
- switch (config->podl_admin_control) {
- case ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED:
- ret = regulator_enable(priv->ps);
- break;
- case ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED:
- ret = regulator_disable(priv->ps);
- break;
- default:
- dev_err(pcdev->dev, "Unknown admin state %i\n",
- config->podl_admin_control);
- ret = -ENOTSUPP;
- }
-
+ ret = regulator_enable(priv->ps);
if (ret)
return ret;
- priv->admin_state = config->podl_admin_control;
+ priv->admin_state = ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED;
+ return 0;
+}
+
+static int
+pse_reg_pi_disable(struct pse_controller_dev *pcdev, int id)
+{
+ struct pse_reg_priv *priv = to_pse_reg(pcdev);
+ int ret;
+ ret = regulator_disable(priv->ps);
+ if (ret)
+ return ret;
+
+ priv->admin_state = ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED;
return 0;
}
+static int
+pse_reg_pi_is_enabled(struct pse_controller_dev *pcdev, int id)
+{
+ struct pse_reg_priv *priv = to_pse_reg(pcdev);
+
+ return regulator_is_enabled(priv->ps);
+}
+
static int
pse_reg_ethtool_get_status(struct pse_controller_dev *pcdev, unsigned long id,
struct netlink_ext_ack *extack,
static const struct pse_controller_ops pse_reg_ops = {
.ethtool_get_status = pse_reg_ethtool_get_status,
- .ethtool_set_config = pse_reg_ethtool_set_config,
+ .pi_enable = pse_reg_pi_enable,
+ .pi_is_enabled = pse_reg_pi_is_enabled,
+ .pi_disable = pse_reg_pi_disable,
};
static int
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