diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-rcar.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c index edded6478792..e7092d5fe700 100644 --- a/drivers/gpio/gpio-rcar.c +++ b/drivers/gpio/gpio-rcar.c @@ -36,6 +36,7 @@ struct gpio_rcar_info { bool has_outdtsel; bool has_both_edge_trigger; bool has_always_in; + bool has_inen; }; struct gpio_rcar_priv { @@ -63,6 +64,7 @@ struct gpio_rcar_priv { #define FILONOFF 0x28 /* Chattering Prevention On/Off Register */ #define OUTDTSEL 0x40 /* Output Data Select Register */ #define BOTHEDGE 0x4c /* One Edge/Both Edge Select Register */ +#define INEN 0x50 /* General Input Enable Register */ #define RCAR_MAX_GPIO_PER_BANK 32 @@ -392,22 +394,35 @@ static const struct gpio_rcar_info gpio_rcar_info_gen1 = { .has_outdtsel = false, .has_both_edge_trigger = false, .has_always_in = false, + .has_inen = false, }; static const struct gpio_rcar_info gpio_rcar_info_gen2 = { .has_outdtsel = true, .has_both_edge_trigger = true, .has_always_in = false, + .has_inen = false, }; static const struct gpio_rcar_info gpio_rcar_info_gen3 = { .has_outdtsel = true, .has_both_edge_trigger = true, .has_always_in = true, + .has_inen = false, +}; + +static const struct gpio_rcar_info gpio_rcar_info_v3u = { + .has_outdtsel = true, + .has_both_edge_trigger = true, + .has_always_in = true, + .has_inen = true, }; static const struct of_device_id gpio_rcar_of_table[] = { { + .compatible = "renesas,gpio-r8a779a0", + .data = &gpio_rcar_info_v3u, + }, { .compatible = "renesas,rcar-gen1-gpio", .data = &gpio_rcar_info_gen1, }, { @@ -448,6 +463,17 @@ static int gpio_rcar_parse_dt(struct gpio_rcar_priv *p, unsigned int *npins) return 0; } +static void gpio_rcar_enable_inputs(struct gpio_rcar_priv *p) +{ + u32 mask = GENMASK(p->gpio_chip.ngpio - 1, 0); + + /* Select "Input Enable" in INEN */ + if (p->gpio_chip.valid_mask) + mask &= p->gpio_chip.valid_mask[0]; + if (mask) + gpio_rcar_write(p, INEN, gpio_rcar_read(p, INEN) | mask); +} + static int gpio_rcar_probe(struct platform_device *pdev) { struct gpio_rcar_priv *p; @@ -537,6 +563,12 @@ static int gpio_rcar_probe(struct platform_device *pdev) goto err1; } + if (p->info.has_inen) { + pm_runtime_get_sync(p->dev); + gpio_rcar_enable_inputs(p); + pm_runtime_put(p->dev); + } + dev_info(dev, "driving %d GPIOs\n", npins); return 0; @@ -612,6 +644,9 @@ static int gpio_rcar_resume(struct device *dev) } } + if (p->info.has_inen) + gpio_rcar_enable_inputs(p); + return 0; } #endif /* CONFIG_PM_SLEEP*/ |