add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/bus/hisi_lpc.c
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@@ -74,7 +74,7 @@
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 /* About 10us. This is specific for single IO operations, such as inb */
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 #define LPC_PEROP_WAITCNT	100
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-static int wait_lpc_idle(unsigned char *mbase, unsigned int waitcnt)
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+static int wait_lpc_idle(void __iomem *mbase, unsigned int waitcnt)
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 {
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 	u32 status;
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..
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@@ -209,7 +209,7 @@
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 	struct hisi_lpc_dev *lpcdev = hostdata;
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 	struct lpc_cycle_para iopara;
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 	unsigned long addr;
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-	u32 rd_data = 0;
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+	__le32 rd_data = 0;
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 	int ret;
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 	if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
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@@ -244,13 +244,12 @@
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 	struct lpc_cycle_para iopara;
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 	const unsigned char *buf;
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 	unsigned long addr;
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+	__le32 _val = cpu_to_le32(val);
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 	if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
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 		return;
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-	val = cpu_to_le32(val);
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-
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-	buf = (const unsigned char *)&val;
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+	buf = (const unsigned char *)&_val;
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 	addr = hisi_lpc_pio_to_addr(lpcdev, pio);
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 	iopara.opflags = FG_INCRADDR_LPC;
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@@ -504,13 +503,13 @@
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 {
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 	struct acpi_device *adev = ACPI_COMPANION(hostdev);
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 	struct acpi_device *child;
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+	struct platform_device *pdev;
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 	int ret;
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 	/* Only consider the children of the host */
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 	list_for_each_entry(child, &adev->children, node) {
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 		const char *hid = acpi_device_hid(child);
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 		const struct hisi_lpc_acpi_cell *cell;
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-		struct platform_device *pdev;
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 		const struct resource *res;
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 		bool found = false;
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 		int num_res;
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@@ -556,10 +555,9 @@
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 		if (!found) {
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 			dev_warn(hostdev,
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-				 "could not find cell for child device (%s)\n",
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+				 "could not find cell for child device (%s), discarding\n",
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 				 hid);
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-			ret = -ENODEV;
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-			goto fail;
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+			continue;
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 		}
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 		pdev = platform_device_alloc(cell->name, PLATFORM_DEVID_AUTO);
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@@ -573,22 +571,24 @@
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 		ret = platform_device_add_resources(pdev, res, num_res);
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 		if (ret)
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-			goto fail;
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+			goto fail_put_device;
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 		ret = platform_device_add_data(pdev, cell->pdata,
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 					       cell->pdata_size);
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 		if (ret)
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-			goto fail;
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+			goto fail_put_device;
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 		ret = platform_device_add(pdev);
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 		if (ret)
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-			goto fail;
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+			goto fail_put_device;
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 		acpi_device_set_enumerated(child);
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 	}
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 	return 0;
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+fail_put_device:
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+	platform_device_put(pdev);
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 fail:
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 	hisi_lpc_acpi_remove(hostdev);
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 	return ret;