ARM64: hisi: SoC driver updates for 4.18
- Update hisi LPC bus driver to use the platform driver APIs other than the MFD APIs to support connected device like UART -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJa9XwUAAoJEAvIV27ZiWZckP0P/iOm7u3uiFK8iG4RBHamw1+2 UBbmBuRD4i9OEk+zPm6GGgB95ALqhbrlD/L7DYXVqd0FmgRuxg4kfXxbWLEwDdUK uJfGtta39oy5UD8vn63x16aqR6Le6dLybeYfFUAtUUZEUIVSfegekxUmgPUcfrYS TbJuVOCwfezn6MDQJ3+YzQpB7oVHCGkIsDTbtb3nCvSViRTtMbWLCSmHMjTv6XOX 7lTtIdpRwta0xavnar+KF/nh+dWWpUpO5Q6I1N0OiXbmzLl4xkKWpQzHnTNzLs7F /6YeyFA9Rk8bLFWEQLWTnWZs3BH9ZnhpAqcRrb9AKNLNEZLM5WFRkxLyh4OhKBNt EUAYiBcu8bF32dfemS47GR1LEyUE38AQRNqRJCZPZ7mVPpVu2v05zNZ390h/OMWo kt6euS9Gie2C4PyEJvttcog/guFT6ETN3b4FB2/l2LNSLRDbFUctu9awojT6vlo2 KZ8+t3b/0YAx96aw71rEcuZWThjmNz5zA0ukdo+/8lYLU/HJGs5pY7L0bor6o++s RMH0Q1vWCOcasxUdVoTPPuSoCod6CM5dIveFlNBjrqIwaRsEnqj3ERW96g8cd6Oz KQNiWuLz13KNPL7TlN/vm/KheDbeR5dvFofHcUSNOHiZ5a827rnPQI/DnfAqru9u fo7SPvGouiGmIjwDFf3Y =V8Bq -----END PGP SIGNATURE----- Merge tag 'hisi-drivers-for-4.18' of git://github.com/hisilicon/linux-hisi into next/drivers ARM64: hisi: SoC driver updates for 4.18 - Update hisi LPC bus driver to use the platform driver APIs other than the MFD APIs to support connected device like UART * tag 'hisi-drivers-for-4.18' of git://github.com/hisilicon/linux-hisi: HISI LPC: Add ACPI UART support HISI LPC: Re-Add ACPI child enumeration support HISI LPC: Stop using MFD APIs Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson
commit
8b26d801cf
2 changed files with 97 additions and 63 deletions
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@ -33,7 +33,6 @@ config HISILICON_LPC
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bool "Support for ISA I/O space on HiSilicon Hip06/7"
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depends on ARM64 && (ARCH_HISI || COMPILE_TEST)
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select INDIRECT_PIO
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select MFD_CORE if ACPI
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help
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Driver to enable I/O access to devices attached to the Low Pin
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Count bus on the HiSilicon Hip06/7 SoC.
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@ -11,12 +11,12 @@
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/logic_pio.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/pci.h>
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#include <linux/serial_8250.h>
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#include <linux/slab.h>
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#define DRV_NAME "hisi-lpc"
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@ -341,15 +341,6 @@ static const struct logic_pio_host_ops hisi_lpc_ops = {
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};
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#ifdef CONFIG_ACPI
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#define MFD_CHILD_NAME_PREFIX DRV_NAME"-"
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#define MFD_CHILD_NAME_LEN (ACPI_ID_LEN + sizeof(MFD_CHILD_NAME_PREFIX) - 1)
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struct hisi_lpc_mfd_cell {
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struct mfd_cell_acpi_match acpi_match;
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char name[MFD_CHILD_NAME_LEN];
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char pnpid[ACPI_ID_LEN];
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};
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static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
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struct acpi_device *host,
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struct resource *res)
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@ -368,7 +359,7 @@ static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
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}
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/*
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* hisi_lpc_acpi_set_io_res - set the resources for a child's MFD
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* hisi_lpc_acpi_set_io_res - set the resources for a child
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* @child: the device node to be updated the I/O resource
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* @hostdev: the device node associated with host controller
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* @res: double pointer to be set to the address of translated resources
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@ -452,78 +443,122 @@ static int hisi_lpc_acpi_set_io_res(struct device *child,
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return 0;
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}
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static int hisi_lpc_acpi_remove_subdev(struct device *dev, void *unused)
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{
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platform_device_unregister(to_platform_device(dev));
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return 0;
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}
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struct hisi_lpc_acpi_cell {
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const char *hid;
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const char *name;
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void *pdata;
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size_t pdata_size;
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};
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/*
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* hisi_lpc_acpi_probe - probe children for ACPI FW
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* @hostdev: LPC host device pointer
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*
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* Returns 0 when successful, and a negative value for failure.
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*
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* Scan all child devices and create a per-device MFD with
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* logical PIO translated IO resources.
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* Create a platform device per child, fixing up the resources
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* from bus addresses to Logical PIO addresses.
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*
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*/
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static int hisi_lpc_acpi_probe(struct device *hostdev)
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{
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struct acpi_device *adev = ACPI_COMPANION(hostdev);
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struct hisi_lpc_mfd_cell *hisi_lpc_mfd_cells;
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struct mfd_cell *mfd_cells;
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struct acpi_device *child;
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int size, ret, count = 0, cell_num = 0;
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int ret;
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list_for_each_entry(child, &adev->children, node)
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cell_num++;
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/* allocate the mfd cell and companion ACPI info, one per child */
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size = sizeof(*mfd_cells) + sizeof(*hisi_lpc_mfd_cells);
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mfd_cells = devm_kcalloc(hostdev, cell_num, size, GFP_KERNEL);
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if (!mfd_cells)
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return -ENOMEM;
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hisi_lpc_mfd_cells = (struct hisi_lpc_mfd_cell *)&mfd_cells[cell_num];
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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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struct mfd_cell *mfd_cell = &mfd_cells[count];
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struct hisi_lpc_mfd_cell *hisi_lpc_mfd_cell =
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&hisi_lpc_mfd_cells[count];
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struct mfd_cell_acpi_match *acpi_match =
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&hisi_lpc_mfd_cell->acpi_match;
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char *name = hisi_lpc_mfd_cell[count].name;
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char *pnpid = hisi_lpc_mfd_cell[count].pnpid;
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struct mfd_cell_acpi_match match = {
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.pnpid = pnpid,
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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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ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev, &res,
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&num_res);
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if (ret) {
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dev_warn(hostdev, "set resource fail (%d)\n", ret);
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goto fail;
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}
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cell = (struct hisi_lpc_acpi_cell []){
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/* ipmi */
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{
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.hid = "IPI0001",
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.name = "hisi-lpc-ipmi",
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},
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/* 8250-compatible uart */
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{
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.hid = "HISI1031",
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.name = "serial8250",
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.pdata = (struct plat_serial8250_port []) {
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{
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.iobase = res->start,
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.uartclk = 1843200,
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.iotype = UPIO_PORT,
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.flags = UPF_BOOT_AUTOCONF,
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},
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{}
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},
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.pdata_size = 2 *
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sizeof(struct plat_serial8250_port),
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},
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{}
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};
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/*
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* For any instances of this host controller (Hip06 and Hip07
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* are the only chipsets), we would not have multiple slaves
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* with the same HID. And in any system we would have just one
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* controller active. So don't worrry about MFD name clashes.
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*/
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snprintf(name, MFD_CHILD_NAME_LEN, MFD_CHILD_NAME_PREFIX"%s",
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acpi_device_hid(child));
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snprintf(pnpid, ACPI_ID_LEN, "%s", acpi_device_hid(child));
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memcpy(acpi_match, &match, sizeof(*acpi_match));
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mfd_cell->name = name;
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mfd_cell->acpi_match = acpi_match;
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ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev,
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&mfd_cell->resources,
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&mfd_cell->num_resources);
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if (ret) {
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dev_warn(&child->dev, "set resource fail (%d)\n", ret);
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return ret;
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for (; cell && cell->name; cell++) {
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if (!strcmp(cell->hid, hid)) {
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found = true;
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break;
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}
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}
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count++;
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}
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ret = mfd_add_devices(hostdev, PLATFORM_DEVID_NONE,
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mfd_cells, cell_num, NULL, 0, NULL);
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if (ret) {
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dev_err(hostdev, "failed to add mfd cells (%d)\n", ret);
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return ret;
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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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hid);
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ret = -ENODEV;
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goto fail;
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}
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pdev = platform_device_alloc(cell->name, PLATFORM_DEVID_AUTO);
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if (!pdev) {
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ret = -ENOMEM;
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goto fail;
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}
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pdev->dev.parent = hostdev;
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ACPI_COMPANION_SET(&pdev->dev, child);
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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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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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ret = platform_device_add(pdev);
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if (ret)
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goto fail;
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acpi_device_set_enumerated(child);
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}
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return 0;
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fail:
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device_for_each_child(hostdev, NULL,
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hisi_lpc_acpi_remove_subdev);
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return ret;
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}
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static const struct acpi_device_id hisi_lpc_acpi_match[] = {
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