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[92.34.216.5]) by smtp.gmail.com with ESMTPSA id q1-20020ac25141000000b004f379affcb3sm18598lfd.61.2023.05.17.14.42.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 May 2023 14:42:57 -0700 (PDT) From: Linus Walleij To: Aaro Koskinen , Janusz Krzysztofik , Tony Lindgren Cc: linux-omap@vger.kernel.org, Linus Walleij Subject: [PATCH v6] ARM: omap1: Make serial wakeup GPIOs use descriptors Date: Wed, 17 May 2023 23:42:52 +0200 Message-Id: <20230517214252.2144960-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org The code in serial.c looks up GPIOs corresponding to a line on the UART when muxed in as GPIO to use this as a wakeup on serial activity for OMAP1. Utilize the NULL device to define some board-specific GPIO lookups and use these to immediately look up the same GPIOs, set as input and convert to IRQ numbers, then set these to wakeup IRQs. This is ugly but should work. This is only needed on the OSK1 and Nokia 770 devices that use the OMAP16xx. Fixes: 92bf78b33b0b ("gpio: omap: use dynamic allocation of base") Signed-off-by: Linus Walleij --- ChangeLog v5->v6: - Only add NULL device tables for Nokia 770 and OSK1. ChangeLog v4->v5: - Fix missing comma - Push descriptors down to each boardfile NULL device GPIO table --- arch/arm/mach-omap1/board-nokia770.c | 7 +++++++ arch/arm/mach-omap1/board-osk.c | 7 +++++++ arch/arm/mach-omap1/serial.c | 30 ++++++++++++++-------------- 3 files changed, 29 insertions(+), 15 deletions(-) diff --git a/arch/arm/mach-omap1/board-nokia770.c b/arch/arm/mach-omap1/board-nokia770.c index dd1a8f439fac..5ea27ca26abf 100644 --- a/arch/arm/mach-omap1/board-nokia770.c +++ b/arch/arm/mach-omap1/board-nokia770.c @@ -294,6 +294,13 @@ static struct gpiod_lookup_table nokia770_irq_gpio_table = { /* GPIO used for tahvo IRQ */ GPIO_LOOKUP("gpio-32-47", 8, "tahvo_irq", GPIO_ACTIVE_HIGH), + /* GPIOs used by serial wakeup IRQs */ + GPIO_LOOKUP_IDX("gpio-32-47", 5, "wakeup", 0, + GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-16-31", 2, "wakeup", 1, + GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-48-63", 1, "wakeup", 2, + GPIO_ACTIVE_HIGH), { } }, }; diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c index a8ca8d427182..463687b9ca52 100644 --- a/arch/arm/mach-omap1/board-osk.c +++ b/arch/arm/mach-omap1/board-osk.c @@ -364,6 +364,13 @@ static struct gpiod_lookup_table osk_irq_gpio_table = { /* GPIO used by the TPS65010 chip */ GPIO_LOOKUP("mpuio", 1, "tps65010", GPIO_ACTIVE_HIGH), + /* GPIOs used for serial wakeup IRQs */ + GPIO_LOOKUP_IDX("gpio-32-47", 5, "wakeup", 0, + GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-16-31", 2, "wakeup", 1, + GPIO_ACTIVE_HIGH), + GPIO_LOOKUP_IDX("gpio-48-63", 1, "wakeup", 2, + GPIO_ACTIVE_HIGH), { } }, }; diff --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c index c7f590645774..3adceb97138f 100644 --- a/arch/arm/mach-omap1/serial.c +++ b/arch/arm/mach-omap1/serial.c @@ -4,7 +4,8 @@ * * OMAP1 serial support. */ -#include +#include +#include #include #include #include @@ -196,39 +197,38 @@ void omap_serial_wake_trigger(int enable) } } -static void __init omap_serial_set_port_wakeup(int gpio_nr) +static void __init omap_serial_set_port_wakeup(int idx) { + struct gpio_desc *d; int ret; - ret = gpio_request(gpio_nr, "UART wake"); - if (ret < 0) { - printk(KERN_ERR "Could not request UART wake GPIO: %i\n", - gpio_nr); + d = gpiod_get_index(NULL, "wakeup", idx, GPIOD_IN); + if (IS_ERR(d)) { + pr_err("Unable to get UART wakeup GPIO descriptor\n"); return; } - gpio_direction_input(gpio_nr); - ret = request_irq(gpio_to_irq(gpio_nr), &omap_serial_wake_interrupt, + ret = request_irq(gpiod_to_irq(d), &omap_serial_wake_interrupt, IRQF_TRIGGER_RISING, "serial wakeup", NULL); if (ret) { - gpio_free(gpio_nr); - printk(KERN_ERR "No interrupt for UART wake GPIO: %i\n", - gpio_nr); + gpiod_put(d); + pr_err("No interrupt for UART%d wake GPIO\n", idx + 1); return; } - enable_irq_wake(gpio_to_irq(gpio_nr)); + enable_irq_wake(gpiod_to_irq(d)); } + int __init omap_serial_wakeup_init(void) { if (!cpu_is_omap16xx()) return 0; if (uart1_ck != NULL) - omap_serial_set_port_wakeup(37); + omap_serial_set_port_wakeup(0); if (uart2_ck != NULL) - omap_serial_set_port_wakeup(18); + omap_serial_set_port_wakeup(1); if (uart3_ck != NULL) - omap_serial_set_port_wakeup(49); + omap_serial_set_port_wakeup(2); return 0; }