linux-kernel - Re: [PATCH RFC 4/4] drivers: irqchip: qcom: add pin information for SDM845

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Message-ID: <2c96f5ec-3e7c-ca04-f265-c4fdc8475db2@arm.com>
Date:   Wed, 24 Jan 2018 14:20:17 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Lina Iyer <ilina@...eaurora.org>, tglx@...utronix.de,
        jason@...edaemon.net
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        sboyd@...eaurora.org, rnayak@...eaurora.org,
        asathyak@...eaurora.org
Subject: Re: [PATCH RFC 4/4] drivers: irqchip: qcom: add pin information for
 SDM845

On 23/01/18 17:56, Lina Iyer wrote:
> From: Archana Sathyakumar <asathyak@...eaurora.org>
> 
> Add PDC pin information for SDM845. Interrupts listed are wake up
> sources for the processor, when the processor and GIC are powered down.
> 
> Signed-off-by: Archana Sathyakumar <asathyak@...eaurora.org>
> Signed-off-by: Lina Iyer <ilina@...eaurora.org>
> ---
>  drivers/irqchip/Makefile          |   2 +-
>  drivers/irqchip/qcom-pdc-sdm845.c | 130 ++++++++++++++++++++++++++++++++++++++
>  drivers/irqchip/qcom-pdc.c        |   3 +
>  drivers/irqchip/qcom-pdc.h        |   1 +
>  4 files changed, 135 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/irqchip/qcom-pdc-sdm845.c
> 
> diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
> index 280723d83916..0cf8f3feb47f 100644
> --- a/drivers/irqchip/Makefile
> +++ b/drivers/irqchip/Makefile
> @@ -84,4 +84,4 @@ obj-$(CONFIG_QCOM_IRQ_COMBINER)		+= qcom-irq-combiner.o
>  obj-$(CONFIG_IRQ_UNIPHIER_AIDET)	+= irq-uniphier-aidet.o
>  obj-$(CONFIG_ARCH_SYNQUACER)		+= irq-sni-exiu.o
>  obj-$(CONFIG_MESON_IRQ_GPIO)		+= irq-meson-gpio.o
> -obj-$(CONFIG_QCOM_PDC)			+= qcom-pdc.o
> +obj-$(CONFIG_QCOM_PDC)			+= qcom-pdc.o qcom-pdc-sdm845.o
> diff --git a/drivers/irqchip/qcom-pdc-sdm845.c b/drivers/irqchip/qcom-pdc-sdm845.c
> new file mode 100644
> index 000000000000..57d0fb51d5ac
> --- /dev/null
> +++ b/drivers/irqchip/qcom-pdc-sdm845.c
> @@ -0,0 +1,130 @@
> +/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#include "qcom-pdc.h"
> +
> +const struct pdc_pin sdm845_data[] = {
> +	{0, 512}, /* rpmh_wake */
> +	{1, 513}, /* ee0_apps_hlos_spmi_periph_irq */
> +	{2, 514}, /* ee1_apps_trustzone_spmi_periph_irq */
> +	{3, 515}, /* secure_wdog_expired */
> +	{4, 516}, /* secure_wdog_bark_irq */
> +	{5, 517}, /* aop_wdog_expired_irq */
> +	{6, 518}, /* qmp_usb3_lfps_rxterm_irq */

[...]

Nice try, but no. This is DT material. Please use the pin number in your
DT, which the driver uses as a hwirq. When it comes to mapping it to the
corresponding GIC SPI, use a per-soc helper that comes from DT too (you
seem to only have two ranges here, so that's pretty easy to do).

> +};
> diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
> index 9b626e9f3a29..0d54db4e915b 100644
> --- a/drivers/irqchip/qcom-pdc.c
> +++ b/drivers/irqchip/qcom-pdc.c
> @@ -241,6 +241,7 @@ static const struct irq_domain_ops qcom_pdc_ops = {
>  };
>  
>  static const struct of_device_id pdc_table[] = {
> +	{ .compatible = "qcom,pdc-sdm845", .data = sdm845_data, },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, pdc_table);
> @@ -286,3 +287,5 @@ int qcom_pdc_init(struct device_node *node, struct device_node *parent)
>  	iounmap(pdc_base);
>  	return ret;
>  }
> +
> +IRQCHIP_DECLARE(pdc_sdm845, "qcom,pdc-sdm845", qcom_pdc_init);
> diff --git a/drivers/irqchip/qcom-pdc.h b/drivers/irqchip/qcom-pdc.h
> index b5b64390175e..6a9d9f9eb4f1 100644
> --- a/drivers/irqchip/qcom-pdc.h
> +++ b/drivers/irqchip/qcom-pdc.h
> @@ -27,4 +27,5 @@ struct pdc_pin {
>  	irq_hw_number_t hwirq;
>  };
>  
> +extern const struct pdc_pin sdm845_data[];
>  #endif /* __QCOM_PDC_H__ */
> 

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...