db_buf             78 drivers/macintosh/smu.c 	u32 __iomem		*db_buf;	/* doorbell buffer */
db_buf            154 drivers/macintosh/smu.c 	writel(smu->cmd_buf_abs, smu->db_buf);
db_buf            553 drivers/macintosh/smu.c 	smu->db_buf = ioremap(0x8000860c, 0x1000);
db_buf            554 drivers/macintosh/smu.c 	if (smu->db_buf == NULL) {