From 54e54e594bc8273d210f7ff4448c165a989cbbe8 Mon Sep 17 00:00:00 2001 From: Bernhard Beschow Date: Wed, 7 May 2025 14:40:40 +0200 Subject: [PATCH] hw/i2c/imx: Always set interrupt status bit if interrupt condition occurs MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit According to the i.MX 8M Plus reference manual, the status flag I2C_I2SR[IIF] continues to be set when an interrupt condition occurs even when I2C interrupts are disabled (I2C_I2CR[IIEN] is clear). However, the device model only sets the flag when I2C interrupts are enabled which causes U-Boot to loop forever. Fix the device model by always setting the flag and let I2C_I2CR[IIEN] guard I2C interrupts only. Also remove the comment in the code since it merely stated the obvious and would be outdated now. Cc: qemu-stable@nongnu.org Fixes: 20d0f9cf6a41 ("i.MX: Add I2C controller emulator") Signed-off-by: Bernhard Beschow Acked-by: Corey Minyard Message-ID: <20250507124040.425773-1-shentey@gmail.com> Signed-off-by: Philippe Mathieu-Daudé --- hw/i2c/imx_i2c.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/hw/i2c/imx_i2c.c b/hw/i2c/imx_i2c.c index 91f84c2ad7..d26177c85d 100644 --- a/hw/i2c/imx_i2c.c +++ b/hw/i2c/imx_i2c.c @@ -79,13 +79,12 @@ static void imx_i2c_reset(DeviceState *dev) static inline void imx_i2c_raise_interrupt(IMXI2CState *s) { - /* - * raise an interrupt if the device is enabled and it is configured - * to generate some interrupts. - */ - if (imx_i2c_is_enabled(s) && imx_i2c_interrupt_is_enabled(s)) { + if (imx_i2c_is_enabled(s)) { s->i2sr |= I2SR_IIF; - qemu_irq_raise(s->irq); + + if (imx_i2c_interrupt_is_enabled(s)) { + qemu_irq_raise(s->irq); + } } } -- 2.39.5