x86: broadwell: Implement PCH_REQ_PMBASE_INFO

Implement this ioctl() to support power off.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/broadwell/pch.c

@@ -630,10 +630,35 @@ static int broadwell_get_gpio_base(struct udevice *dev, u32 *gbasep)
 	return 0;
 }
 
+static int broadwell_ioctl(struct udevice *dev, enum pch_req_t req, void *data,
+			   int size)
+{
+	switch (req) {
+	case PCH_REQ_PMBASE_INFO: {
+		struct pch_pmbase_info *pm = data;
+		int ret;
+
+		/* Find the base address of the powermanagement registers */
+		ret = dm_pci_read_config16(dev, 0x40, &pm->base);
+		if (ret)
+			return ret;
+		pm->base &= 0xfffe;
+		pm->gpio0_en_ofs = GPE0_EN(0);
+		pm->pm1_sts_ofs = PM1_STS;
+		pm->pm1_cnt_ofs = PM1_CNT;
+
+		return 0;
+	}
+	default:
+		return -ENOSYS;
+	}
+}
+
 static const struct pch_ops broadwell_pch_ops = {
 	.get_spi_base	= broadwell_pch_get_spi_base,
 	.set_spi_protect = broadwell_set_spi_protect,
 	.get_gpio_base	= broadwell_get_gpio_base,
+	.ioctl		= broadwell_ioctl,
 };
 
 static const struct udevice_id broadwell_pch_ids[] = {