netdev - Re: [PATCH V7 net-next 11/11] ptp: Add a driver for InES time stamping IP core.

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Date:   Sat, 21 Dec 2019 11:56:03 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
        devicetree@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Mark Rutland <mark.rutland@....com>,
        Miroslav Lichvar <mlichvar@...hat.com>,
        Murali Karicheri <m-karicheri2@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        Wingman Kwok <w-kwok2@...com>
Subject: Re: [PATCH V7 net-next 11/11] ptp: Add a driver for InES time
 stamping IP core.

> +static int ines_clock_init(struct ines_clock *clock, struct device *device,
> +			   void __iomem *addr)
> +{
> +	struct device_node *node = device->of_node;
> +	unsigned long port_addr;
> +	struct ines_port *port;
> +	int i, j;
> +
> +	INIT_LIST_HEAD(&clock->list);
> +	clock->node = node;
> +	clock->dev  = device;
> +	clock->base = addr;
> +	clock->regs = clock->base;
> +
> +	for (i = 0; i < INES_N_PORTS; i++) {
> +		port = &clock->port[i];
> +		port_addr = (unsigned long) clock->base +
> +			INES_PORT_OFFSET + i * INES_PORT_SIZE;
> +		port->regs = (struct ines_port_registers *) port_addr;
> +		port->clock = clock;
> +		port->index = i;
> +		INIT_DELAYED_WORK(&port->ts_work, ines_txtstamp_work);
> +		spin_lock_init(&port->lock);
> +		INIT_LIST_HEAD(&port->events);
> +		INIT_LIST_HEAD(&port->pool);
> +		for (j = 0; j < INES_MAX_EVENTS; j++)
> +			list_add(&port->pool_data[j].list, &port->pool);
> +	}
> +
> +	ines_write32(clock, 0xBEEF, test);
> +	ines_write32(clock, 0xBEEF, test2);
> +
> +	dev_dbg(device, "ID      0x%x\n", ines_read32(clock, id));
> +	dev_dbg(device, "TEST    0x%x\n", ines_read32(clock, test));
> +	dev_dbg(device, "VERSION 0x%x\n", ines_read32(clock, version));
> +	dev_dbg(device, "TEST2   0x%x\n", ines_read32(clock, test2));

Hi Richard

Since you are respinnig...

Maybe fail the probe if when you read back test and tests they don't
have the expected value?

     Andrew