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Date: Mon, 11 Apr 2011 12:21:50 +0100 From: Jamie Iles <jamie@...ieiles.com> To: linux-kernel@...r.kernel.org Cc: linux@....linux.org.uk, tglx@...utronix.de, cbouatmailru@...il.com, grant.likely@...retlab.ca, arnd@...db.de, nico@...xnic.net, Jamie Iles <jamie@...ieiles.com> Subject: [PATCHv3 3/7] 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@...ieiles.com> Acked-by: Anton Vorontsov <cbouatmailru@...il.com> Cc: Grant Likely <grant.likely@...retlab.ca> --- drivers/gpio/basic_mmio_gpio.c | 18 ++++++++++++------ include/linux/basic_mmio_gpio.h | 1 + 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/gpio/basic_mmio_gpio.c b/drivers/gpio/basic_mmio_gpio.c index 5db5de4..2b2d384 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); diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h index 198087a..f23ec73 100644 --- a/include/linux/basic_mmio_gpio.h +++ b/include/linux/basic_mmio_gpio.h @@ -15,6 +15,7 @@ struct bgpio_pdata { int base; + int ngpio; }; #endif /* __BASIC_MMIO_GPIO_H */ -- 1.7.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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