@@ -33,7 +33,6 @@ config HISILICON_LPC
bool "Support for ISA I/O space on HiSilicon Hip06/7"
depends on ARM64 && (ARCH_HISI || COMPILE_TEST)
select INDIRECT_PIO
- select MFD_CORE if ACPI
help
Driver to enable I/O access to devices attached to the Low Pin
Count bus on the HiSilicon Hip06/7 SoC.
@@ -11,7 +11,6 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/logic_pio.h>
-#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
@@ -341,15 +340,6 @@ static void hisi_lpc_comm_outs(void *hostdata, unsigned long pio,
};
#ifdef CONFIG_ACPI
-#define MFD_CHILD_NAME_PREFIX DRV_NAME"-"
-#define MFD_CHILD_NAME_LEN (ACPI_ID_LEN + sizeof(MFD_CHILD_NAME_PREFIX) - 1)
-
-struct hisi_lpc_mfd_cell {
- struct mfd_cell_acpi_match acpi_match;
- char name[MFD_CHILD_NAME_LEN];
- char pnpid[ACPI_ID_LEN];
-};
-
static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
struct acpi_device *host,
struct resource *res)
@@ -368,7 +358,7 @@ static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
}
/*
- * hisi_lpc_acpi_set_io_res - set the resources for a child's MFD
+ * hisi_lpc_acpi_set_io_res - set the resources for a child
* @child: the device node to be updated the I/O resource
* @hostdev: the device node associated with host controller
* @res: double pointer to be set to the address of translated resources
@@ -458,69 +448,23 @@ static int hisi_lpc_acpi_set_io_res(struct device *child,
*
* Returns 0 when successful, and a negative value for failure.
*
- * Scan all child devices and create a per-device MFD with
- * logical PIO translated IO resources.
*/
static int hisi_lpc_acpi_probe(struct device *hostdev)
{
struct acpi_device *adev = ACPI_COMPANION(hostdev);
- struct hisi_lpc_mfd_cell *hisi_lpc_mfd_cells;
- struct mfd_cell *mfd_cells;
struct acpi_device *child;
- int size, ret, count = 0, cell_num = 0;
-
- list_for_each_entry(child, &adev->children, node)
- cell_num++;
-
- /* allocate the mfd cell and companion ACPI info, one per child */
- size = sizeof(*mfd_cells) + sizeof(*hisi_lpc_mfd_cells);
- mfd_cells = devm_kcalloc(hostdev, cell_num, size, GFP_KERNEL);
- if (!mfd_cells)
- return -ENOMEM;
+ int ret;
- hisi_lpc_mfd_cells = (struct hisi_lpc_mfd_cell *)&mfd_cells[cell_num];
/* Only consider the children of the host */
list_for_each_entry(child, &adev->children, node) {
- struct mfd_cell *mfd_cell = &mfd_cells[count];
- struct hisi_lpc_mfd_cell *hisi_lpc_mfd_cell =
- &hisi_lpc_mfd_cells[count];
- struct mfd_cell_acpi_match *acpi_match =
- &hisi_lpc_mfd_cell->acpi_match;
- char *name = hisi_lpc_mfd_cell[count].name;
- char *pnpid = hisi_lpc_mfd_cell[count].pnpid;
- struct mfd_cell_acpi_match match = {
- .pnpid = pnpid,
- };
-
- /*
- * For any instances of this host controller (Hip06 and Hip07
- * are the only chipsets), we would not have multiple slaves
- * with the same HID. And in any system we would have just one
- * controller active. So don't worrry about MFD name clashes.
- */
- snprintf(name, MFD_CHILD_NAME_LEN, MFD_CHILD_NAME_PREFIX"%s",
- acpi_device_hid(child));
- snprintf(pnpid, ACPI_ID_LEN, "%s", acpi_device_hid(child));
-
- memcpy(acpi_match, &match, sizeof(*acpi_match));
- mfd_cell->name = name;
- mfd_cell->acpi_match = acpi_match;
-
- ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev,
- &mfd_cell->resources,
- &mfd_cell->num_resources);
+ const struct resource *res;
+ int num_res;
+
+ ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev, &res,
+ &num_res);
if (ret) {
- dev_warn(&child->dev, "set resource fail (%d)\n", ret);
- return ret;
+ dev_warn(hostdev, "set resource fail (%d)\n", ret);
}
- count++;
- }
-
- ret = mfd_add_devices(hostdev, PLATFORM_DEVID_NONE,
- mfd_cells, cell_num, NULL, 0, NULL);
- if (ret) {
- dev_err(hostdev, "failed to add mfd cells (%d)\n", ret);
- return ret;
}
return 0;
The MFD APIs should only be used by drivers in drivers/mfd. It is not worth splitting the driver to have separate parts in drivers/bus and drivers/mfd, so just drop MFD API usage. As a solution, we will use the platform device APIs directly to achieve the same as we had when using MFD APIs. Signed-off-by: John Garry <john.garry@huawei.com> --- drivers/bus/Kconfig | 1 - drivers/bus/hisi_lpc.c | 72 ++++++-------------------------------------------- 2 files changed, 8 insertions(+), 65 deletions(-) -- 1.9.1