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i3c: dw: Preserve DAT entry bits when restoring addresses

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Update dw_i3c_master_restore_addrs() to preserve existing bits in each
Device Address Table (DAT) entry when restoring addresses. This prevents
overwriting configuration bits during PM runtime resumes.

Signed-off-by: Adrian Ng Ho Yin <adrianhoyin.ng@altera.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/46112c0da44110f46709cb0e7a4595e312b95c10.1765529948.git.adrianhoyin.ng@altera.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Ng Ho Yin 2025-12-12 17:02:58 +08:00 committed by Alexandre Belloni
parent 4cd9d2bf0b
commit de28e002df
1 changed files with 9 additions and 4 deletions
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13
drivers/i3c/master/dw-i3c-master.c
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@ -1718,11 +1718,16 @@ static void dw_i3c_master_restore_addrs(struct dw_i3c_master *master)
if (master->free_pos & BIT(pos))
continue;
if (master->devs[pos].is_i2c_addr)
reg_val = DEV_ADDR_TABLE_LEGACY_I2C_DEV |
reg_val = readl(master->regs + DEV_ADDR_TABLE_LOC(master->datstartaddr, pos));
if (master->devs[pos].is_i2c_addr) {
reg_val &= ~DEV_ADDR_TABLE_STATIC_MASK;
reg_val |= DEV_ADDR_TABLE_LEGACY_I2C_DEV |
DEV_ADDR_TABLE_STATIC_ADDR(master->devs[pos].addr);
else
reg_val = DEV_ADDR_TABLE_DYNAMIC_ADDR(master->devs[pos].addr);
} else {
reg_val &= ~DEV_ADDR_TABLE_DYNAMIC_MASK;
reg_val |= DEV_ADDR_TABLE_DYNAMIC_ADDR(master->devs[pos].addr);
}
writel(reg_val, master->regs + DEV_ADDR_TABLE_LOC(master->datstartaddr, pos));
}