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Thu, 10 Oct 2024 13:48:05 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Thu, 10 Oct 2024 13:48:05 -0500 Received: from judy-hp.dhcp.ti.com (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 49AIm3V9011182; Thu, 10 Oct 2024 13:48:05 -0500 From: Judith Mendez To: Grygorii Strashko , Santosh Shilimkar , Kevin Hilman , Linus Walleij , Bartosz Golaszewski CC: , , , , Judith Mendez , Bin Liu Subject: [PATCH 1/2] gpio: omap: Add omap_gpio_disable/enable_irq calls Date: Thu, 10 Oct 2024 13:48:01 -0500 Message-ID: <20241010184802.203441-2-jm@ti.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241010184802.203441-1-jm@ti.com> References: <20241010184802.203441-1-jm@ti.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Add omap_gpio_disable_irq and omap_gpio_enable_irq calls in gpio-omap. Currently, kernel cannot disable gpio interrupts in case of a irq storm, so add omap_gpio_disable_irq so that interrupts can be disabled/enabled. Signed-off-by: Bin Liu Signed-off-by: Judith Mendez --- drivers/gpio/gpio-omap.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 76d5d87e9681..913e6ece1238 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -711,6 +711,31 @@ static void omap_gpio_unmask_irq(struct irq_data *d) raw_spin_unlock_irqrestore(&bank->lock, flags); } +static void omap_gpio_set_irq(struct irq_data *d, bool enable) +{ + struct gpio_bank *bank = omap_irq_data_get_bank(d); + unsigned int offset = d->hwirq; + unsigned long flags; + + raw_spin_lock_irqsave(&bank->lock, flags); + omap_set_gpio_irqenable(bank, offset, enable); + raw_spin_unlock_irqrestore(&bank->lock, flags); +} + +static void omap_gpio_disable_irq(struct irq_data *d) +{ + bool enable = 1; + + omap_gpio_set_irq(d, !enable); +} + +static void omap_gpio_enable_irq(struct irq_data *d) +{ + bool enable = 1; + + omap_gpio_set_irq(d, enable); +} + static void omap_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) { struct gpio_bank *bank = omap_irq_data_get_bank(d); @@ -723,6 +748,8 @@ static const struct irq_chip omap_gpio_irq_chip = { .irq_shutdown = omap_gpio_irq_shutdown, .irq_mask = omap_gpio_mask_irq, .irq_unmask = omap_gpio_unmask_irq, + .irq_disable = omap_gpio_disable_irq, + .irq_enable = omap_gpio_enable_irq, .irq_set_type = omap_gpio_irq_type, .irq_set_wake = omap_gpio_wake_enable, .irq_bus_lock = omap_gpio_irq_bus_lock, @@ -737,6 +764,8 @@ static const struct irq_chip omap_gpio_irq_chip_nowake = { .irq_shutdown = omap_gpio_irq_shutdown, .irq_mask = omap_gpio_mask_irq, .irq_unmask = omap_gpio_unmask_irq, + .irq_disable = omap_gpio_disable_irq, + .irq_enable = omap_gpio_enable_irq, .irq_set_type = omap_gpio_irq_type, .irq_bus_lock = omap_gpio_irq_bus_lock, .irq_bus_sync_unlock = gpio_irq_bus_sync_unlock, From patchwork Thu Oct 10 18:48:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Judith Mendez X-Patchwork-Id: 1995722 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; 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Thu, 10 Oct 2024 13:48:06 -0500 Received: from judy-hp.dhcp.ti.com (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 49AIm3VA011182; Thu, 10 Oct 2024 13:48:06 -0500 From: Judith Mendez To: Grygorii Strashko , Santosh Shilimkar , Kevin Hilman , Linus Walleij , Bartosz Golaszewski CC: , , , , Judith Mendez , Bin Liu Subject: [PATCH 2/2] serial: 8250: omap: Move pm_runtime_get_sync Date: Thu, 10 Oct 2024 13:48:02 -0500 Message-ID: <20241010184802.203441-3-jm@ti.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241010184802.203441-1-jm@ti.com> References: <20241010184802.203441-1-jm@ti.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Currently in omap_8250_shutdown, the dma->rx_running flag is set to zero in omap_8250_rx_dma_flush. Next pm_runtime_get_sync is called, which is a runtime resume call stack which can re-set the flag. When the call omap_8250_shutdown returns, the flag is expected to be UN-SET, but this is not the case. This is causing issues the next time UART is re-opened and omap_8250_rx_dma is called. Fix by moving pm_runtime_get_sync before the omap_8250_rx_dma_flush. Fixes: 0e31c8d173ab ("tty: serial: 8250_omap: add custom DMA-RX callback") Signed-off-by: Bin Liu Signed-off-by: Judith Mendez --- drivers/tty/serial/8250/8250_omap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 88b58f44e4e9..0dd68bdbfbcf 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -776,12 +776,12 @@ static void omap_8250_shutdown(struct uart_port *port) struct uart_8250_port *up = up_to_u8250p(port); struct omap8250_priv *priv = port->private_data; + pm_runtime_get_sync(port->dev); + flush_work(&priv->qos_work); if (up->dma) omap_8250_rx_dma_flush(up); - pm_runtime_get_sync(port->dev); - serial_out(up, UART_OMAP_WER, 0); if (priv->habit & UART_HAS_EFR2) serial_out(up, UART_OMAP_EFR2, 0x0);