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[193.106.246.138]) by smtp.gmail.com with ESMTPSA id g22sm3443791lja.29.2020.08.17.06.40.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Aug 2020 06:40:58 -0700 (PDT) From: Grzegorz Jaszczyk To: tglx@linutronix.de, jason@lakedaemon.net, maz@kernel.org, s-anna@ti.com Subject: [PATCH v5 4/5] irqchip/irq-pruss-intc: Implement irq_{get, set}_irqchip_state ops Date: Mon, 17 Aug 2020 15:40:12 +0200 Message-Id: <1597671613-20879-5-git-send-email-grzegorz.jaszczyk@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1597671613-20879-1-git-send-email-grzegorz.jaszczyk@linaro.org> References: <1597671613-20879-1-git-send-email-grzegorz.jaszczyk@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200817_094100_964833_C633BA78 X-CRM114-Status: GOOD ( 16.62 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:244 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, grzegorz.jaszczyk@linaro.org, david@lechnology.com, praneeth@ti.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-omap@vger.kernel.org, lee.jones@linaro.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: David Lechner This implements the irq_get_irqchip_state and irq_set_irqchip_state callbacks for the TI PRUSS INTC driver. The set callback can be used by drivers to "kick" a PRU by injecting a PRU system event. Example: irq_set_irqchip_state(irq, IRQCHIP_STATE_PENDING, true); Signed-off-by: David Lechner Signed-off-by: Suman Anna Signed-off-by: Grzegorz Jaszczyk Reviewed-by: Lee Jones --- v4->v5: - No change. v3->v4: - Update commit message v2->v3: - Get rid of unnecessary pruss_intc_check_write() and use pruss_intc_write_reg directly. v1->v2: - https://patchwork.kernel.org/patch/11069769/ --- drivers/irqchip/irq-pruss-intc.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/irqchip/irq-pruss-intc.c b/drivers/irqchip/irq-pruss-intc.c index 1a72591..15f0407 100644 --- a/drivers/irqchip/irq-pruss-intc.c +++ b/drivers/irqchip/irq-pruss-intc.c @@ -9,6 +9,7 @@ * Copyright (C) 2019 David Lechner */ +#include #include #include #include @@ -319,6 +320,43 @@ static void pruss_intc_irq_relres(struct irq_data *data) module_put(THIS_MODULE); } +static int pruss_intc_irq_get_irqchip_state(struct irq_data *data, + enum irqchip_irq_state which, + bool *state) +{ + struct pruss_intc *intc = irq_data_get_irq_chip_data(data); + u32 reg, mask, srsr; + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + reg = PRU_INTC_SRSR(data->hwirq / 32); + mask = BIT(data->hwirq % 32); + + srsr = pruss_intc_read_reg(intc, reg); + + *state = !!(srsr & mask); + + return 0; +} + +static int pruss_intc_irq_set_irqchip_state(struct irq_data *data, + enum irqchip_irq_state which, + bool state) +{ + struct pruss_intc *intc = irq_data_get_irq_chip_data(data); + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + if (state) + pruss_intc_write_reg(intc, PRU_INTC_SISR, data->hwirq); + else + pruss_intc_write_reg(intc, PRU_INTC_SICR, data->hwirq); + + return 0; +} + static struct irq_chip pruss_irqchip = { .name = "pruss-intc", .irq_ack = pruss_intc_irq_ack, @@ -326,6 +364,8 @@ static struct irq_chip pruss_irqchip = { .irq_unmask = pruss_intc_irq_unmask, .irq_request_resources = pruss_intc_irq_reqres, .irq_release_resources = pruss_intc_irq_relres, + .irq_get_irqchip_state = pruss_intc_irq_get_irqchip_state, + .irq_set_irqchip_state = pruss_intc_irq_set_irqchip_state, }; static int pruss_intc_validate_mapping(struct pruss_intc *intc, int event,