diff options
| author | Jamie Iles <jamie@jamieiles.com> | 2011-05-20 00:40:15 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-05-20 00:40:15 -0600 |
| commit | 924e7a9fc6da124588e27c611841d07047c157b4 (patch) | |
| tree | 7f886a9e10666ba3fc0e39b1976e50eb52274178 /drivers/gpio | |
| parent | 4ddb8ae217ad2aae888d00d97c5160f677dd38f4 (diff) | |
basic_mmio_gpio: allow overriding number of gpio
Some platforms may have a number of GPIO that is less than the register
width of the peripheral.
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/basic_mmio_gpio.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/gpio/basic_mmio_gpio.c b/drivers/gpio/basic_mmio_gpio.c index 5db5de43832..2b2d3845446 100644 --- a/drivers/gpio/basic_mmio_gpio.c +++ b/drivers/gpio/basic_mmio_gpio.c @@ -239,6 +239,7 @@ static int __devinit bgpio_probe(struct platform_device *pdev) resource_size_t dat_sz; int bits; int ret; + int ngpio; res_dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat"); if (!res_dat) @@ -249,6 +250,7 @@ static int __devinit bgpio_probe(struct platform_device *pdev) return -EINVAL; bits = dat_sz * 8; + ngpio = bits; if (bits > BITS_PER_LONG) return -EINVAL; @@ -277,13 +279,22 @@ static int __devinit bgpio_probe(struct platform_device *pdev) spin_lock_init(&bgc->lock); + if (pdata) { + bgc->gc.base = pdata->base; + if (pdata->ngpio > 0) + ngpio = pdata->ngpio; + } else { + bgc->gc.base = -1; + } + bgc->bits = bits; ret = bgpio_setup_accessors(pdev, bgc); if (ret) return ret; bgc->data = bgc->read_reg(bgc->reg_dat); - bgc->gc.ngpio = bits; + + bgc->gc.ngpio = ngpio; bgc->gc.direction_input = bgpio_dir_in; bgc->gc.direction_output = bgpio_dir_out; bgc->gc.get = bgpio_get; @@ -291,11 +302,6 @@ static int __devinit bgpio_probe(struct platform_device *pdev) bgc->gc.dev = dev; bgc->gc.label = dev_name(dev); - if (pdata) - bgc->gc.base = pdata->base; - else - bgc->gc.base = -1; - platform_set_drvdata(pdev, bgc); ret = gpiochip_add(&bgc->gc); |