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i3c: renesas: Reconfigure the DATBAS register on re-attach

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During re-attach, the device may change its position in the i3c->addrs[]
array. As a result, it may use a different Device Address Table Basic
Register (DATBAS), which needs to be reconfigured.

Reconfigure the DATBAS register on re-attach. Along with it update
software caches.

Fixes: d028219a9f ("i3c: master: Add basic driver for the Renesas I3C controller")
Cc: stable@vger.kernel.org
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260713130545.568657-5-claudiu.beznea+renesas@tuxon.dev
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Claudiu Beznea 2026-07-13 16:05:32 +03:00 committed by Alexandre Belloni
parent 7b15ca2615
commit 1364afd3e2
1 changed files with 16 additions and 0 deletions
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16
drivers/i3c/master/renesas-i3c.c
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@ -909,10 +909,26 @@ static int renesas_i3c_reattach_i3c_dev(struct i3c_dev_desc *dev,
struct i3c_master_controller *m = i3c_dev_get_master(dev);
struct renesas_i3c *i3c = to_renesas_i3c(m);
struct renesas_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
int pos;
pos = renesas_i3c_get_free_pos(i3c);
if (data->index > pos && pos >= 0) {
renesas_writel(i3c->regs, DATBAS(data->index), 0);
i3c->addrs[data->index] = 0;
i3c->free_pos |= BIT(data->index);
data->index = pos;
i3c->free_pos &= ~BIT(data->index);
}
i3c->addrs[data->index] = dev->info.dyn_addr ? dev->info.dyn_addr :
dev->info.static_addr;
renesas_writel(i3c->regs, DATBAS(data->index),
DATBAS_DVSTAD(dev->info.static_addr) |
datbas_dvdyad_with_parity(i3c->addrs[data->index]));
return 0;
}