diff options
| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2011-09-28 15:49:11 +0530 |
|---|---|---|
| committer | Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com> | 2011-09-29 13:23:33 +0200 |
| commit | c9c9d9f79c31fbd6dca07c1a86dd70c7aeecf996 (patch) | |
| tree | b6df2ceba3ee314d5308ce855893d9111046b87c /drivers/gpio | |
| parent | 370864f29bedc39973a987f3ee70efbe57d263ad (diff) | |
gpio: nomadik: support low EMI mode
ST-Ericsson ID: 345488
ST-Ericsson Linux next: NA
ST-Ericsson FOSS-OUT ID: Trivial
Change-Id: I88f6c92f199e52186acf6899e14ed399aba657ac
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32354
Reviewed-by: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-nomadik.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 1a50a9a89de..b9ab895359b 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -60,6 +60,7 @@ struct nmk_gpio_chip { u32 rimsc; u32 fimsc; u32 pull_up; + u32 lowemi; }; static struct nmk_gpio_chip * @@ -124,6 +125,24 @@ static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip, } } +static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip, + unsigned offset, bool lowemi) +{ + u32 bit = BIT(offset); + bool enabled = nmk_chip->lowemi & bit; + + if (lowemi == enabled) + return; + + if (lowemi) + nmk_chip->lowemi |= bit; + else + nmk_chip->lowemi &= ~bit; + + writel_relaxed(nmk_chip->lowemi, + nmk_chip->addr + NMK_GPIO_LOWEMI); +} + static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip, unsigned offset) { @@ -268,6 +287,8 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, __nmk_gpio_set_pull(nmk_chip, offset, pull); } + __nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg)); + /* * If the pin is switching to altfunc, and there was an interrupt * installed on it which has been lazy disabled, actually mask the @@ -1180,6 +1201,10 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) chip->dev = &dev->dev; chip->owner = THIS_MODULE; + clk_enable(nmk_chip->clk); + nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI); + clk_disable(nmk_chip->clk); + ret = gpiochip_add(&nmk_chip->chip); if (ret) goto out_free; |