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[86.30.250.44]) by smtp.gmail.com with ESMTPSA id r64sm12266664wmg.5.2018.12.10.02.23.16 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 10 Dec 2018 02:23:16 -0800 (PST) From: Srinivas Kandagatla To: marc.zyngier@arm.com Cc: sudeep.holla@arm.com, tglx@linutronix.de, jason@lakedaemon.net, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, rnayak@codeaurora.org, sboyd@kernel.org, bjorn.andersson@linaro.org, nicolas.dechesne@linaro.org, ctatlor97@gmail.com, vkoul@kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org, Srinivas Kandagatla Subject: [PATCH v4 2/4] irqchip/gic: common: add support to device tree based quirks Date: Mon, 10 Dec 2018 10:23:07 +0000 Message-Id: <20181210102309.8207-3-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181210102309.8207-1-srinivas.kandagatla@linaro.org> References: <20181210102309.8207-1-srinivas.kandagatla@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds support to device tree based quirks based on device tree compatible string. Signed-off-by: Srinivas Kandagatla --- drivers/irqchip/irq-gic-common.c | 12 ++++++++++++ drivers/irqchip/irq-gic-common.h | 3 +++ drivers/irqchip/irq-gic-v3.c | 5 +++++ 3 files changed, 20 insertions(+) diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c index 01e673c680cd..3c93c6f4d1f1 100644 --- a/drivers/irqchip/irq-gic-common.c +++ b/drivers/irqchip/irq-gic-common.c @@ -36,6 +36,18 @@ void gic_set_kvm_info(const struct gic_kvm_info *info) gic_kvm_info = info; } +void gic_enable_of_quirks(const struct device_node *np, + const struct gic_quirk *quirks, void *data) +{ + for (; quirks->desc; quirks++) { + if (!of_device_is_compatible(np, quirks->compatible)) + continue; + if (quirks->init(data)) + pr_info("GIC: enabling workaround for %s\n", + quirks->desc); + } +} + void gic_enable_quirks(u32 iidr, const struct gic_quirk *quirks, void *data) { diff --git a/drivers/irqchip/irq-gic-common.h b/drivers/irqchip/irq-gic-common.h index 3919cd7c5285..97e58fb6c232 100644 --- a/drivers/irqchip/irq-gic-common.h +++ b/drivers/irqchip/irq-gic-common.h @@ -23,6 +23,7 @@ struct gic_quirk { const char *desc; + const char *compatible; bool (*init)(void *data); u32 iidr; u32 mask; @@ -35,6 +36,8 @@ void gic_dist_config(void __iomem *base, int gic_irqs, void gic_cpu_config(void __iomem *base, void (*sync_access)(void)); void gic_enable_quirks(u32 iidr, const struct gic_quirk *quirks, void *data); +void gic_enable_of_quirks(const struct device_node *np, + const struct gic_quirk *quirks, void *data); void gic_set_kvm_info(const struct gic_kvm_info *info); diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 29e9d47be97d..c95796fa4de6 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1271,6 +1271,9 @@ static void __init gic_of_setup_kvm_info(struct device_node *node) gic_set_kvm_info(&gic_v3_kvm_info); } +static const struct gic_quirk gic_quirks[] = { +}; + static int __init gic_of_init(struct device_node *node, struct device_node *parent) { void __iomem *dist_base; @@ -1318,6 +1321,8 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare if (of_property_read_u64(node, "redistributor-stride", &redist_stride)) redist_stride = 0; + gic_enable_of_quirks(node, gic_quirks, &gic_data); + err = gic_init_bases(dist_base, rdist_regs, nr_redist_regions, redist_stride, &node->fwnode); if (err) -- 2.19.2