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([fe80::89a7:a50:147b:52c6%4]) with mapi id 15.20.2199.021; Thu, 29 Aug 2019 14:09:09 +0000 From: Vitor Soares To: Boris Brezillon , Vitor Soares CC: "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-i3c@lists.infradead.org" , "bbrezillon@kernel.org" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "Joao.Pinto@synopsys.com" Subject: RE: [PATCH 4/4] i3c: master: dw: reattach device on first available location of address table Thread-Topic: [PATCH 4/4] i3c: master: dw: reattach device on first available location of address table Thread-Index: AQHVXlJtIp4F4pXufkmtQ4ohVfCkbKcR+XCAgAAvvRA= Date: Thu, 29 Aug 2019 14:09:08 +0000 Message-ID: References: <20190829131519.3f420c64@collabora.com> In-Reply-To: <20190829131519.3f420c64@collabora.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dg-ref: =?us-ascii?Q?PG1ldGE+PGF0IG5tPSJib2R5LnR4dCIgcD0iYzpcdXNlcnNcc29hcmVzXGFw?= 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nIG8ZvUnaTVqmTuM4PJ6TWBW0+paSYCyJh/k8JedD8q8C/j2w4dIMOVG3Abkl8WMhSFoZ3o4xYuvLKg1XB2eERHCQlOzvP+jh/CW3W1kIAG+hQu21bNul21+WgY5FznThlPNNbv5PJhgA8FLv69dVdJnQVKIe4DBruVR5qsWALhROBOdTvBvAgW6NK1F8P2DWXLlqDcIjFpmaO075fSXvu9STjmqbTuCUjGxT7TOPn0YQFkQxBsun8ljhEE8JnrTB6bpab/62lr0XEAFZgMiXRURSjKbSxTNpa1WDTjK9Q6XEjdkrpjk2G4LoQbCvCASb+aKQp6x0jk5xNYji6SfFKVvBzpeJvdEiGH0MR/XOV1NpXSP+eYDgkfQsjh4ECtht/Hy8lqc+K08LWyGuqsuhF9YQlTmV7GnJN/Gqoux5Aw= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 810117fe-844c-4a17-d2de-08d72c8a75d4 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Aug 2019 14:09:08.8866 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: c33c9f88-1eb7-4099-9700-16013fd9e8aa X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 5/UEr987AcGMFSR/DzKtR1IJFRwsxVw97VpJ3dysho5/fUyxN1CUAlEGt/V+if7eWSg/66pdCx8h/4SOsoX61Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR12MB2734 X-OriginatorOrg: synopsys.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Boris, From: Boris Brezillon Date: Thu, Aug 29, 2019 at 12:15:19 > On Thu, 29 Aug 2019 12:19:35 +0200 > Vitor Soares wrote: >=20 > > For today the reattach function only update the device address on the > > controller. > >=20 > > 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. >=20 > Given the number of available slots I honestly don't think it makes a > difference, but I also don't mind this change, so The slots are HW dependent. The point is, I need to guarantee the=20 available slot are consecutives. If you have any suggestion I appreciate. >=20 > Reviewed-by: Boris Brezillon >=20 > >=20 > > Signed-off-by: Vitor Soares > > --- > > drivers/i3c/master/dw-i3c-master.c | 16 ++++++++++++++++ > > 1 file changed, 16 insertions(+) > >=20 > > 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 i= 3c_dev_desc *dev, > > struct dw_i3c_i2c_dev_data *data =3D i3c_dev_get_master_data(dev); > > struct i3c_master_controller *m =3D i3c_dev_get_master(dev); > > struct dw_i3c_master *master =3D to_dw_i3c_master(m); > > + int pos; > > + > > + pos =3D 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] =3D 0; > > + master->free_pos |=3D BIT(data->index); > > + > > + data->index =3D pos; > > + master->addrs[pos] =3D dev->info.dyn_addr; > > + master->free_pos &=3D ~BIT(pos); > > + } > > =20 > > writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr), > > master->regs + Best regards, Vitor Soares