irqchip/gicv3-its: platform-msi: Refactor its_pmsi_prepare()
By adding ACPI support for platform MSI, the gicv3 driver has to provide code to retrieve the dev id through ACPI instead of device tree bindings; given that its_pmsi_prepare() allows already to get the dev id but it is OF dependent, factor OF related code out into a single function to make its_pmsi_prepare() ready to be used with other firmware interfaces. Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> [lorenzo.pieralisi@arm.com: rewrote commit log] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Tested-by: Ming Lei <ming.lei@canonical.com> Tested-by: Wei Xu <xuwei5@hisilicon.com> Tested-by: Sinan Kaya <okaya@codeaurora.org> Cc: Tomasz Nowicki <tn@semihalf.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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@ -24,15 +24,11 @@ static struct irq_chip its_pmsi_irq_chip = {
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.name = "ITS-pMSI",
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};
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static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
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int nvec, msi_alloc_info_t *info)
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static int of_pmsi_get_dev_id(struct irq_domain *domain, struct device *dev,
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u32 *dev_id)
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{
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struct msi_domain_info *msi_info;
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u32 dev_id;
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int ret, index = 0;
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msi_info = msi_get_domain_info(domain->parent);
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/* Suck the DeviceID out of the msi-parent property */
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do {
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struct of_phandle_args args;
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@ -43,11 +39,24 @@ static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
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if (args.np == irq_domain_get_of_node(domain)) {
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if (WARN_ON(args.args_count != 1))
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return -EINVAL;
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dev_id = args.args[0];
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*dev_id = args.args[0];
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break;
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}
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} while (!ret);
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return ret;
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}
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static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
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int nvec, msi_alloc_info_t *info)
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{
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struct msi_domain_info *msi_info;
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u32 dev_id;
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int ret;
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msi_info = msi_get_domain_info(domain->parent);
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ret = of_pmsi_get_dev_id(domain, dev, &dev_id);
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if (ret)
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return ret;
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