From: Javier Martinez Canillas Date: Mon, 24 Jun 2013 15:13:23 +0000 (+0200) Subject: gpio/omap: don't use linear domain mapping for OMAP1 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=397eada946712b90e0620c378b366bcc6c98c9f6;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Tested-by: Aaro Koskinen Signed-off-by: Tony Lindgren --- diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index d3f7d2db870f..4a430360af5a 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -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;