hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

gpio/omap: don't use linear domain mapping for OMAP1 

Commit ede4d7a5 ("gpio/omap: convert gpio irq domain to linear mapping")
converted the OMAP GPIO driver to use a linear mapping for the GPIO IRQ
domain instead of using a legacy mapping. Not using a legacy mapping has
a number of benefits but it requires the platform to support SPARSE_IRQ
which currently is not supported on OMAP1.

So this change caused a regression on OMAP1 platforms [1].

Since this issue is not present on all OMAP2+ platforms, there is no need to
revert the driver to use legacy domain mapping for all the platforms.

[1]: http://www.mail-archive.com/linux-omap@vger.kernel.org/msg89005.html

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Javier Martinez Canillas 2013-06-24 17:13:23 +02:00 committed by Tony Lindgren
parent 9e895ace5d
commit 397eada946
1 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/gpio/gpio-omap.c
View File

@ -1094,6 +1094,9 @@ static int omap_gpio_probe(struct platform_device *pdev)
const struct omap_gpio_platform_data *pdata;
struct resource *res;
struct gpio_bank *bank;
#ifdef CONFIG_ARCH_OMAP1
int irq_base;
#endif
match = of_match_device(of_match_ptr(omap_gpio_match), dev);
@ -1135,11 +1138,28 @@ static int omap_gpio_probe(struct platform_device *pdev)
pdata->get_context_loss_count;
}
#ifdef CONFIG_ARCH_OMAP1
/*
* REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
* irq_alloc_descs() and irq_domain_add_legacy() and just use a
* linear IRQ domain mapping for all OMAP platforms.
*/
irq_base = irq_alloc_descs(-1, 0, bank->width, 0);
if (irq_base < 0) {
dev_err(dev, "Couldn't allocate IRQ numbers\n");
return -ENODEV;
}
bank->domain = irq_domain_add_legacy(node, bank->width, irq_base,
0, &irq_domain_simple_ops, NULL);
#else
bank->domain = irq_domain_add_linear(node, bank->width,
&irq_domain_simple_ops, NULL);
if (!bank->domain)
#endif
if (!bank->domain) {
dev_err(dev, "Couldn't register an IRQ domain\n");
return -ENODEV;
}
if (bank->regs->set_dataout && bank->regs->clr_dataout)
bank->set_dataout = _set_gpio_dataout_reg;