diff options
author | Robert Jarzmik <robert.jarzmik@free.fr> | 2015-11-21 19:04:51 +0100 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2015-12-10 16:12:35 +0100 |
commit | aedf08b664b71ecf0b35891eb6c83e26b888342a (patch) | |
tree | 4b79d97ae546b904aa1d7025656ea4cc708d3d97 /drivers/pinctrl/pxa | |
parent | pinctrl: pxa: pxa2xx: add pin muxing (diff) | |
download | linux-aedf08b664b71ecf0b35891eb6c83e26b888342a.tar.xz linux-aedf08b664b71ecf0b35891eb6c83e26b888342a.zip |
pinctrl: pxa: pxa2xx: add pin configuration support
Add pin configuration for pxa2xx architectures. PXA doesn't provide any
bias, push, pull capabilities. The only capability is to set a state for
the pins when the platform enter sleep or deep sleep mode.
The state of a pin is set by :
- whether the GPIO direction was input or output
- if it is output, a register set programs whether the pin should be
held to ground or VccIO
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pxa')
-rw-r--r-- | drivers/pinctrl/pxa/pinctrl-pxa2xx.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/pinctrl/pxa/pinctrl-pxa2xx.c b/drivers/pinctrl/pxa/pinctrl-pxa2xx.c index a4ba82459af8..e01914460219 100644 --- a/drivers/pinctrl/pxa/pinctrl-pxa2xx.c +++ b/drivers/pinctrl/pxa/pinctrl-pxa2xx.c @@ -184,7 +184,70 @@ static const struct pinmux_ops pxa2xx_pinmux_ops = { .gpio_set_direction = pxa2xx_pmx_gpio_set_direction, }; +static int pxa2xx_pconf_group_get(struct pinctrl_dev *pctldev, + unsigned group, + unsigned long *config) +{ + struct pxa_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct pxa_pinctrl_group *g = pctl->groups + group; + unsigned long flags; + unsigned pin = g->pin; + void __iomem *pgsr = pctl->base_pgsr[pin / 32]; + u32 val; + + spin_lock_irqsave(&pctl->lock, flags); + val = readl_relaxed(pgsr) & BIT(pin % 32); + *config = val ? PIN_CONFIG_LOW_POWER_MODE : 0; + spin_unlock_irqrestore(&pctl->lock, flags); + + dev_dbg(pctl->dev, "get sleep gpio state(pin=%d) %d\n", + pin, !!val); + return 0; +} + +static int pxa2xx_pconf_group_set(struct pinctrl_dev *pctldev, + unsigned group, + unsigned long *configs, + unsigned num_configs) +{ + struct pxa_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct pxa_pinctrl_group *g = pctl->groups + group; + unsigned long flags; + unsigned pin = g->pin; + void __iomem *pgsr = pctl->base_pgsr[pin / 32]; + int i, is_set = 0; + u32 val; + + for (i = 0; i < num_configs; i++) { + switch (pinconf_to_config_param(configs[i])) { + case PIN_CONFIG_LOW_POWER_MODE: + is_set = pinconf_to_config_argument(configs[i]); + break; + default: + return -EINVAL; + } + } + + dev_dbg(pctl->dev, "set sleep gpio state(pin=%d) %d\n", + pin, is_set); + + spin_lock_irqsave(&pctl->lock, flags); + val = readl_relaxed(pgsr); + val = (val & ~BIT(pin % 32)) | (is_set ? BIT(pin % 32) : 0); + writel_relaxed(val, pgsr); + spin_unlock_irqrestore(&pctl->lock, flags); + + return 0; +} + +static const struct pinconf_ops pxa2xx_pconf_ops = { + .pin_config_group_get = pxa2xx_pconf_group_get, + .pin_config_group_set = pxa2xx_pconf_group_set, + .is_generic = true, +}; + static struct pinctrl_desc pxa2xx_pinctrl_desc = { + .confops = &pxa2xx_pconf_ops, .pctlops = &pxa2xx_pctl_ops, .pmxops = &pxa2xx_pinmux_ops, }; |