Commit de28e002 authored by Adrian Ng Ho Yin's avatar Adrian Ng Ho Yin Committed by Alexandre Belloni
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i3c: dw: Preserve DAT entry bits when restoring addresses 



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: default avatarAdrian Ng Ho Yin <adrianhoyin.ng@altera.com>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/46112c0da44110f46709cb0e7a4595e312b95c10.1765529948.git.adrianhoyin.ng@altera.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 4cd9d2bf

drivers/i3c/master/dw-i3c-master.c

+9 −4
Original line number Diff line number Diff line
@@ -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));

	}