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SubjectRe: [PATCH v3 00/25] irq_domain generalization and refinement
* Russell King - ARM Linux <linux@arm.linux.org.uk> [120204 14:00]:
>
> Actually, it turns out to be not that hard, because twl doesn't actually
> make use of the IRQ domain stuff:
>
> commit aeb5032b3f8b9ab69daa545777433fa94b3494c4
> Author: Benoit Cousson <b-cousson@ti.com>
> AuthorDate: Mon Aug 29 16:20:23 2011 +0200
> Commit: Samuel Ortiz <sameo@linux.intel.com>
> CommitDate: Mon Jan 9 00:37:40 2012 +0100
>
> mfd: twl-core: Add initial DT support for twl4030/twl6030
>
> [grant.likely@secretlab.ca: Fix IRQ_DOMAIN dependency in kconfig]
>
> Adding any dependency - especially one which wouldn't be enabled - for
> a new feature which wasn't required before is going to break existing
> users, so this shouldn't have been done in the first place.
>
> A better fix to preserve existing users would've been as below - yes
> it means more ifdefs, but if irq domain is to remain a DT only thing
> then we're going to end up with _lots_ of this stuff.
>
> I'd much prefer to see irq domain become more widely available so it
> doesn't require these ifdefs everywhere.

Your patch below looks like a correct fix to me to the problem
you and Grazvydas are seeing:

Acked-by: Tony Lindgren <tony@atomide.com>

> drivers/mfd/Kconfig | 2 +-
> drivers/mfd/twl-core.c | 4 ++++
> 2 files changed, 5 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 28a301b..bd60ce0 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -200,7 +200,7 @@ config MENELAUS
>
> config TWL4030_CORE
> bool "Texas Instruments TWL4030/TWL5030/TWL6030/TPS659x0 Support"
> - depends on I2C=y && GENERIC_HARDIRQS && IRQ_DOMAIN
> + depends on I2C=y && GENERIC_HARDIRQS
> help
> Say yes here if you have TWL4030 / TWL6030 family chip on your board.
> This core driver provides register access and IRQ handling
> diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
> index e04e04d..5913aaa 100644
> --- a/drivers/mfd/twl-core.c
> +++ b/drivers/mfd/twl-core.c
> @@ -263,7 +263,9 @@ struct twl_client {
>
> static struct twl_client twl_modules[TWL_NUM_SLAVES];
>
> +#ifdef CONFIG_IRQ_DOMAIN
> static struct irq_domain domain;
> +#endif
>
> /* mapping the module id to slave id and base address */
> struct twl_mapping {
> @@ -1226,6 +1228,7 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
> pdata->irq_base = status;
> pdata->irq_end = pdata->irq_base + nr_irqs;
>
> +#ifdef CONFIG_IRQ_DOMAIN
> domain.irq_base = pdata->irq_base;
> domain.nr_irq = nr_irqs;
> #ifdef CONFIG_OF_IRQ
> @@ -1233,6 +1236,7 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
> domain.ops = &irq_domain_simple_ops;
> #endif
> irq_domain_add(&domain);
> +#endif
>
> if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
> dev_dbg(&client->dev, "can't talk I2C?\n");
> _______________________________________________
> devicetree-discuss mailing list
> devicetree-discuss@lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/devicetree-discuss


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