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path: root/drivers/pinctrl/meson/pinctrl-meson.c
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Diffstat (limited to 'drivers/pinctrl/meson/pinctrl-meson.c')
-rw-r--r--drivers/pinctrl/meson/pinctrl-meson.c222
1 files changed, 87 insertions, 135 deletions
diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
index 44e69c963f5d..57122eda155a 100644
--- a/drivers/pinctrl/meson/pinctrl-meson.c
+++ b/drivers/pinctrl/meson/pinctrl-meson.c
@@ -21,9 +21,8 @@
* domain which can't be powered off; the bank also uses a set of
* registers different from the other banks.
*
- * For each of the two power domains (regular and always-on) there are
- * 4 different register ranges that control the following properties
- * of the pins:
+ * For each pin controller there are 4 different register ranges that
+ * control the following properties of the pins:
* 1) pin muxing
* 2) pull enable/disable
* 3) pull up/down
@@ -33,8 +32,8 @@
* direction are the same and thus there are only 3 register ranges.
*
* Every pinmux group can be enabled by a specific bit in the first
- * register range of the domain; when all groups for a given pin are
- * disabled the pin acts as a GPIO.
+ * register range; when all groups for a given pin are disabled the
+ * pin acts as a GPIO.
*
* For the pull and GPIO configuration every bank uses a contiguous
* set of bits in the register sets described above; the same register
@@ -66,21 +65,21 @@
/**
* meson_get_bank() - find the bank containing a given pin
*
- * @domain: the domain containing the pin
+ * @pc: the pinctrl instance
* @pin: the pin number
* @bank: the found bank
*
* Return: 0 on success, a negative value on error
*/
-static int meson_get_bank(struct meson_domain *domain, unsigned int pin,
+static int meson_get_bank(struct meson_pinctrl *pc, unsigned int pin,
struct meson_bank **bank)
{
int i;
- for (i = 0; i < domain->data->num_banks; i++) {
- if (pin >= domain->data->banks[i].first &&
- pin <= domain->data->banks[i].last) {
- *bank = &domain->data->banks[i];
+ for (i = 0; i < pc->data->num_banks; i++) {
+ if (pin >= pc->data->banks[i].first &&
+ pin <= pc->data->banks[i].last) {
+ *bank = &pc->data->banks[i];
return 0;
}
}
@@ -89,33 +88,6 @@ static int meson_get_bank(struct meson_domain *domain, unsigned int pin,
}
/**
- * meson_get_domain_and_bank() - find domain and bank containing a given pin
- *
- * @pc: Meson pin controller device
- * @pin: the pin number
- * @domain: the found domain
- * @bank: the found bank
- *
- * Return: 0 on success, a negative value on error
- */
-static int meson_get_domain_and_bank(struct meson_pinctrl *pc, unsigned int pin,
- struct meson_domain **domain,
- struct meson_bank **bank)
-{
- struct meson_domain *d;
-
- d = pc->domain;
-
- if (pin >= d->data->pin_base &&
- pin < d->data->pin_base + d->data->num_pins) {
- *domain = d;
- return meson_get_bank(d, pin, bank);
- }
-
- return -EINVAL;
-}
-
-/**
* meson_calc_reg_and_bit() - calculate register and bit for a pin
*
* @bank: the bank containing the pin
@@ -190,7 +162,6 @@ static void meson_pmx_disable_other_groups(struct meson_pinctrl *pc,
unsigned int pin, int sel_group)
{
struct meson_pmx_group *group;
- struct meson_domain *domain;
int i, j;
for (i = 0; i < pc->data->num_groups; i++) {
@@ -201,8 +172,7 @@ static void meson_pmx_disable_other_groups(struct meson_pinctrl *pc,
for (j = 0; j < group->num_pins; j++) {
if (group->pins[j] == pin) {
/* We have found a group using the pin */
- domain = pc->domain;
- regmap_update_bits(domain->reg_mux,
+ regmap_update_bits(pc->reg_mux,
group->reg * 4,
BIT(group->bit), 0);
}
@@ -216,7 +186,6 @@ static int meson_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned func_num,
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
struct meson_pmx_func *func = &pc->data->funcs[func_num];
struct meson_pmx_group *group = &pc->data->groups[group_num];
- struct meson_domain *domain = pc->domain;
int i, ret = 0;
dev_dbg(pc->dev, "enable function %s, group %s\n", func->name,
@@ -231,7 +200,7 @@ static int meson_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned func_num,
/* Function 0 (GPIO) doesn't need any additional setting */
if (func_num)
- ret = regmap_update_bits(domain->reg_mux, group->reg * 4,
+ ret = regmap_update_bits(pc->reg_mux, group->reg * 4,
BIT(group->bit), BIT(group->bit));
return ret;
@@ -287,14 +256,13 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
unsigned long *configs, unsigned num_configs)
{
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
- struct meson_domain *domain;
struct meson_bank *bank;
enum pin_config_param param;
unsigned int reg, bit;
int i, ret;
u16 arg;
- ret = meson_get_domain_and_bank(pc, pin, &domain, &bank);
+ ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
@@ -307,7 +275,7 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
dev_dbg(pc->dev, "pin %u: disable bias\n", pin);
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
- ret = regmap_update_bits(domain->reg_pull, reg,
+ ret = regmap_update_bits(pc->reg_pull, reg,
BIT(bit), 0);
if (ret)
return ret;
@@ -317,13 +285,13 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
&reg, &bit);
- ret = regmap_update_bits(domain->reg_pullen, reg,
+ ret = regmap_update_bits(pc->reg_pullen, reg,
BIT(bit), BIT(bit));
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
- ret = regmap_update_bits(domain->reg_pull, reg,
+ ret = regmap_update_bits(pc->reg_pull, reg,
BIT(bit), BIT(bit));
if (ret)
return ret;
@@ -333,13 +301,13 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
&reg, &bit);
- ret = regmap_update_bits(domain->reg_pullen, reg,
+ ret = regmap_update_bits(pc->reg_pullen, reg,
BIT(bit), BIT(bit));
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
- ret = regmap_update_bits(domain->reg_pull, reg,
+ ret = regmap_update_bits(pc->reg_pull, reg,
BIT(bit), 0);
if (ret)
return ret;
@@ -354,18 +322,17 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
static int meson_pinconf_get_pull(struct meson_pinctrl *pc, unsigned int pin)
{
- struct meson_domain *domain;
struct meson_bank *bank;
unsigned int reg, bit, val;
int ret, conf;
- ret = meson_get_domain_and_bank(pc, pin, &domain, &bank);
+ ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg, &bit);
- ret = regmap_read(domain->reg_pullen, reg, &val);
+ ret = regmap_read(pc->reg_pullen, reg, &val);
if (ret)
return ret;
@@ -374,7 +341,7 @@ static int meson_pinconf_get_pull(struct meson_pinctrl *pc, unsigned int pin)
} else {
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
- ret = regmap_read(domain->reg_pull, reg, &val);
+ ret = regmap_read(pc->reg_pull, reg, &val);
if (ret)
return ret;
@@ -452,82 +419,82 @@ static int meson_gpio_request(struct gpio_chip *chip, unsigned gpio)
static void meson_gpio_free(struct gpio_chip *chip, unsigned gpio)
{
- struct meson_domain *domain = gpiochip_get_data(chip);
+ struct meson_pinctrl *pc = gpiochip_get_data(chip);
- pinctrl_free_gpio(domain->data->pin_base + gpio);
+ pinctrl_free_gpio(pc->data->pin_base + gpio);
}
static int meson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
- struct meson_domain *domain = gpiochip_get_data(chip);
+ struct meson_pinctrl *pc = gpiochip_get_data(chip);
unsigned int reg, bit, pin;
struct meson_bank *bank;
int ret;
- pin = domain->data->pin_base + gpio;
- ret = meson_get_bank(domain, pin, &bank);
+ pin = pc->data->pin_base + gpio;
+ ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_DIR, &reg, &bit);
- return regmap_update_bits(domain->reg_gpio, reg, BIT(bit), BIT(bit));
+ return regmap_update_bits(pc->reg_gpio, reg, BIT(bit), BIT(bit));
}
static int meson_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
int value)
{
- struct meson_domain *domain = gpiochip_get_data(chip);
+ struct meson_pinctrl *pc = gpiochip_get_data(chip);
unsigned int reg, bit, pin;
struct meson_bank *bank;
int ret;
- pin = domain->data->pin_base + gpio;
- ret = meson_get_bank(domain, pin, &bank);
+ pin = pc->data->pin_base + gpio;
+ ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_DIR, &reg, &bit);
- ret = regmap_update_bits(domain->reg_gpio, reg, BIT(bit), 0);
+ ret = regmap_update_bits(pc->reg_gpio, reg, BIT(bit), 0);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_OUT, &reg, &bit);
- return regmap_update_bits(domain->reg_gpio, reg, BIT(bit),
+ return regmap_update_bits(pc->reg_gpio, reg, BIT(bit),
value ? BIT(bit) : 0);
}
static void meson_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
{
- struct meson_domain *domain = gpiochip_get_data(chip);
+ struct meson_pinctrl *pc = gpiochip_get_data(chip);
unsigned int reg, bit, pin;
struct meson_bank *bank;
int ret;
- pin = domain->data->pin_base + gpio;
- ret = meson_get_bank(domain, pin, &bank);
+ pin = pc->data->pin_base + gpio;
+ ret = meson_get_bank(pc, pin, &bank);
if (ret)
return;
meson_calc_reg_and_bit(bank, pin, REG_OUT, &reg, &bit);
- regmap_update_bits(domain->reg_gpio, reg, BIT(bit),
+ regmap_update_bits(pc->reg_gpio, reg, BIT(bit),
value ? BIT(bit) : 0);
}
static int meson_gpio_get(struct gpio_chip *chip, unsigned gpio)
{
- struct meson_domain *domain = gpiochip_get_data(chip);
+ struct meson_pinctrl *pc = gpiochip_get_data(chip);
unsigned int reg, bit, val, pin;
struct meson_bank *bank;
int ret;
- pin = domain->data->pin_base + gpio;
- ret = meson_get_bank(domain, pin, &bank);
+ pin = pc->data->pin_base + gpio;
+ ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_IN, &reg, &bit);
- regmap_read(domain->reg_gpio, reg, &val);
+ regmap_read(pc->reg_gpio, reg, &val);
return !!(val & BIT(bit));
}
@@ -562,35 +529,32 @@ static const struct of_device_id meson_pinctrl_dt_match[] = {
static int meson_gpiolib_register(struct meson_pinctrl *pc)
{
- struct meson_domain *domain;
int ret;
- domain = pc->domain;
-
- domain->chip.label = domain->data->name;
- domain->chip.parent = pc->dev;
- domain->chip.request = meson_gpio_request;
- domain->chip.free = meson_gpio_free;
- domain->chip.direction_input = meson_gpio_direction_input;
- domain->chip.direction_output = meson_gpio_direction_output;
- domain->chip.get = meson_gpio_get;
- domain->chip.set = meson_gpio_set;
- domain->chip.base = domain->data->pin_base;
- domain->chip.ngpio = domain->data->num_pins;
- domain->chip.can_sleep = false;
- domain->chip.of_node = domain->of_node;
- domain->chip.of_gpio_n_cells = 2;
-
- ret = gpiochip_add_data(&domain->chip, domain);
+ pc->chip.label = pc->data->name;
+ pc->chip.parent = pc->dev;
+ pc->chip.request = meson_gpio_request;
+ pc->chip.free = meson_gpio_free;
+ pc->chip.direction_input = meson_gpio_direction_input;
+ pc->chip.direction_output = meson_gpio_direction_output;
+ pc->chip.get = meson_gpio_get;
+ pc->chip.set = meson_gpio_set;
+ pc->chip.base = pc->data->pin_base;
+ pc->chip.ngpio = pc->data->num_pins;
+ pc->chip.can_sleep = false;
+ pc->chip.of_node = pc->of_node;
+ pc->chip.of_gpio_n_cells = 2;
+
+ ret = gpiochip_add_data(&pc->chip, pc);
if (ret) {
dev_err(pc->dev, "can't add gpio chip %s\n",
- domain->data->name);
+ pc->data->name);
goto fail;
}
- ret = gpiochip_add_pin_range(&domain->chip, dev_name(pc->dev),
- 0, domain->data->pin_base,
- domain->chip.ngpio);
+ ret = gpiochip_add_pin_range(&pc->chip, dev_name(pc->dev),
+ 0, pc->data->pin_base,
+ pc->chip.ngpio);
if (ret) {
dev_err(pc->dev, "can't add pin range\n");
goto fail;
@@ -598,7 +562,7 @@ static int meson_gpiolib_register(struct meson_pinctrl *pc)
return 0;
fail:
- gpiochip_remove(&pc->domain->chip);
+ gpiochip_remove(&pc->chip);
return ret;
}
@@ -637,58 +601,46 @@ static struct regmap *meson_map_resource(struct meson_pinctrl *pc,
static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc,
struct device_node *node)
{
- struct device_node *np;
- struct meson_domain *domain;
- int num_domains = 0;
+ struct device_node *np, *gpio_np = NULL;
for_each_child_of_node(node, np) {
if (!of_find_property(np, "gpio-controller", NULL))
continue;
- num_domains++;
+ if (gpio_np) {
+ dev_err(pc->dev, "multiple gpio nodes\n");
+ return -EINVAL;
+ }
+ gpio_np = np;
}
- if (num_domains != 1) {
- dev_err(pc->dev, "wrong number of subnodes\n");
+ if (!gpio_np) {
+ dev_err(pc->dev, "no gpio node found\n");
return -EINVAL;
}
- pc->domain = devm_kzalloc(pc->dev, sizeof(struct meson_domain), GFP_KERNEL);
- if (!pc->domain)
- return -ENOMEM;
-
- domain = pc->domain;
- domain->data = pc->data->domain_data;
-
- for_each_child_of_node(node, np) {
- if (!of_find_property(np, "gpio-controller", NULL))
- continue;
-
- domain->of_node = np;
+ pc->of_node = gpio_np;
- domain->reg_mux = meson_map_resource(pc, np, "mux");
- if (IS_ERR(domain->reg_mux)) {
- dev_err(pc->dev, "mux registers not found\n");
- return PTR_ERR(domain->reg_mux);
- }
-
- domain->reg_pull = meson_map_resource(pc, np, "pull");
- if (IS_ERR(domain->reg_pull)) {
- dev_err(pc->dev, "pull registers not found\n");
- return PTR_ERR(domain->reg_pull);
- }
+ pc->reg_mux = meson_map_resource(pc, gpio_np, "mux");
+ if (IS_ERR(pc->reg_mux)) {
+ dev_err(pc->dev, "mux registers not found\n");
+ return PTR_ERR(pc->reg_mux);
+ }
- domain->reg_pullen = meson_map_resource(pc, np, "pull-enable");
- /* Use pull region if pull-enable one is not present */
- if (IS_ERR(domain->reg_pullen))
- domain->reg_pullen = domain->reg_pull;
+ pc->reg_pull = meson_map_resource(pc, gpio_np, "pull");
+ if (IS_ERR(pc->reg_pull)) {
+ dev_err(pc->dev, "pull registers not found\n");
+ return PTR_ERR(pc->reg_pull);
+ }
- domain->reg_gpio = meson_map_resource(pc, np, "gpio");
- if (IS_ERR(domain->reg_gpio)) {
- dev_err(pc->dev, "gpio registers not found\n");
- return PTR_ERR(domain->reg_gpio);
- }
+ pc->reg_pullen = meson_map_resource(pc, gpio_np, "pull-enable");
+ /* Use pull region if pull-enable one is not present */
+ if (IS_ERR(pc->reg_pullen))
+ pc->reg_pullen = pc->reg_pull;
- break;
+ pc->reg_gpio = meson_map_resource(pc, gpio_np, "gpio");
+ if (IS_ERR(pc->reg_gpio)) {
+ dev_err(pc->dev, "gpio registers not found\n");
+ return PTR_ERR(pc->reg_gpio);
}
return 0;