From: Thomas Gleixner <tglx@linutronix.de>
To: Richard Fitzgerald <rf@opensource.cirrus.com>
Cc: jason@lakedaemon.net, marc.zyngier@arm.com, lee.jones@linaro.org,
patches@opensource.cirrus.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v10 2/2] irqchip: Add driver for Cirrus Logic Madera codecs
Date: Thu, 30 Aug 2018 12:31:04 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.21.1808301154040.1210@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20180828130934.18135-2-rf@opensource.cirrus.com>
On Tue, 28 Aug 2018, Richard Fitzgerald wrote:
> @@ -0,0 +1,244 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Interrupt support for Cirrus Logic Madera codecs
> + *
> + * Copyright (C) 2015-2018 Cirrus Logic
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; version 2.
You have the SPDX identifier above, which makes this boilerplate
superfluous.
> +#ifdef CONFIG_PM_SLEEP
> +static int madera_suspend_noirq(struct device *dev)
> +{
> + struct madera *madera = dev_get_drvdata(dev->parent);
> +
> + dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n");
> +
> + enable_irq(madera->irq);
> +
> + return 0;
> +}
> +
> +static int madera_suspend(struct device *dev)
> +{
> + struct madera *madera = dev_get_drvdata(dev->parent);
> +
> + dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n");
> +
> + disable_irq(madera->irq);
> +
> + return 0;
> +}
This really wants a comment why you are disabling it first and reenabling
it afterwards. I have no idea why you are doing this and it doesn't make
much sense from the S/R perspective either.
> + /*
> + * Read the flags from the interrupt controller if not specified
> + * by pdata
> + */
> + irq_flags = madera->pdata.irq_flags;
> + if (!irq_flags) {
> + irq_data = irq_get_irq_data(madera->irq);
> + if (!irq_data) {
> + dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq);
> + return -EINVAL;
> + }
> +
> + irq_flags = irqd_get_trigger_type(irq_data);
> +
> + /* Codec defaults to trigger low, use this if no flags given */
> + if (irq_flags == IRQ_TYPE_NONE)
> + irq_flags = IRQF_TRIGGER_LOW;
> + }
> +
> + if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
> + dev_err(&pdev->dev, "Host interrupt not level-triggered\n");
> + return -EINVAL;
> + }
> +
> + if (irq_flags & IRQF_TRIGGER_HIGH) {
> + ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL,
> + MADERA_IRQ_POL_MASK, 0);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "Failed to set IRQ polarity: %d\n", ret);
> + return ret;
> + }
> + }
This looks wrong. Why are you only updating the polarity for trigger HIGH?
> diff --git a/include/linux/irqchip/irq-madera.h b/include/linux/irqchip/irq-madera.h
> new file mode 100644
> index 000000000000..5aeb7e6adc82
> --- /dev/null
> +++ b/include/linux/irqchip/irq-madera.h
> @@ -0,0 +1,135 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Interrupt support for Cirrus Logic Madera codecs
> + *
> + * Copyright 2016-2018 Cirrus Logic
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; version 2.
See above.
Thanks,
tglx
next prev parent reply other threads:[~2018-08-30 10:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 13:09 [PATCH v10 1/2] mfd: madera: Add irqchip data pointer into struct madera Richard Fitzgerald
2018-08-28 13:09 ` [PATCH v10 2/2] irqchip: Add driver for Cirrus Logic Madera codecs Richard Fitzgerald
2018-08-30 10:31 ` Thomas Gleixner [this message]
2018-08-30 11:44 ` Richard Fitzgerald
2018-08-30 11:51 ` Thomas Gleixner
2018-09-10 11:33 ` Lee Jones
2018-09-10 12:08 ` Richard Fitzgerald
2018-09-10 12:17 ` Richard Fitzgerald
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