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From: Boris Brezillon <boris.brezillon@collabora.com>
To: Vitor Soares <Vitor.Soares@synopsys.com>
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
	Joao.Pinto@synopsys.com, bbrezillon@kernel.org,
	linux-kernel@vger.kernel.org, robh+dt@kernel.org,
	linux-i3c@lists.infradead.org
Subject: Re: [PATCH 4/4] i3c: master: dw: reattach device on first available location of address table
Date: Thu, 29 Aug 2019 13:15:19 +0200
Message-ID: <20190829131519.3f420c64@collabora.com> (raw)
In-Reply-To: <e03fb41054a8431b27cc84c3d83ada9464172ef7.1567071213.git.vitor.soares@synopsys.com>

On Thu, 29 Aug 2019 12:19:35 +0200
Vitor Soares <Vitor.Soares@synopsys.com> wrote:

> For today the reattach function only update the device address on the
> controller.
> 
> Update the location to the first available too, will optimize the
> enumeration process avoiding additional checks to keep the available
> positions on address table consecutive.

Given the number of available slots I honestly don't think it makes a
difference, but I also don't mind this change, so

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

> 
> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> ---
>  drivers/i3c/master/dw-i3c-master.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
> index 1d83c97..62261ac 100644
> --- a/drivers/i3c/master/dw-i3c-master.c
> +++ b/drivers/i3c/master/dw-i3c-master.c
> @@ -898,6 +898,22 @@ static int dw_i3c_master_reattach_i3c_dev(struct i3c_dev_desc *dev,
>  	struct dw_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
>  	struct i3c_master_controller *m = i3c_dev_get_master(dev);
>  	struct dw_i3c_master *master = to_dw_i3c_master(m);
> +	int pos;
> +
> +	pos = dw_i3c_master_get_free_pos(master);
> +
> +	if (data->index > pos && pos > 0) {
> +		writel(0,
> +		       master->regs +
> +		       DEV_ADDR_TABLE_LOC(master->datstartaddr, data->index));
> +
> +		master->addrs[data->index] = 0;
> +		master->free_pos |= BIT(data->index);
> +
> +		data->index = pos;
> +		master->addrs[pos] = dev->info.dyn_addr;
> +		master->free_pos &= ~BIT(pos);
> +	}
>  
>  	writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr),
>  	       master->regs +


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Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-29 10:19 [PATCH 0/4] i3c: remove device if failed on pre_assign_dyn_addr() Vitor Soares
2019-08-29 10:19 ` [PATCH 1/4] i3c: master: detach and free device if pre_assign_dyn_addr() fails Vitor Soares
2019-08-29 10:41   ` Boris Brezillon
2019-08-29 13:53     ` Vitor Soares
2019-08-29 14:35       ` Boris Brezillon
2019-08-29 15:23         ` Vitor Soares
2019-08-29 15:37           ` Boris Brezillon
2019-08-29 16:23             ` Vitor Soares
2019-08-29 10:19 ` [PATCH 2/4] i3c: master: Check if devices have i3c_dev_boardinfo on i3c_master_add_i3c_dev_locked() Vitor Soares
2019-08-29 10:44   ` Boris Brezillon
2019-08-29 14:00     ` Vitor Soares
2019-08-29 14:39       ` Boris Brezillon
2019-08-29 14:39         ` Boris Brezillon
2019-08-29 15:07           ` Vitor Soares
2019-08-29 15:24             ` Boris Brezillon
2019-08-29 15:57               ` Vitor Soares
2019-08-29 16:15                 ` Boris Brezillon
2019-08-29 16:33                   ` Vitor Soares
2019-08-29 16:37                     ` Boris Brezillon
2019-08-29 16:27   ` Boris Brezillon
2019-08-29 10:19 ` [PATCH 3/4] dt-bindings: i3c: Make 'assigned-address' valid if static address != 0 Vitor Soares
2019-08-29 10:51   ` Boris Brezillon
2019-08-29 14:06     ` Vitor Soares
2019-08-29 10:19 ` [PATCH 4/4] i3c: master: dw: reattach device on first available location of address table Vitor Soares
2019-08-29 11:15   ` Boris Brezillon [this message]
2019-08-29 14:09     ` Vitor Soares

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