From: "zhichang.yuan" <[email protected]> Based on the provious patches, this patch supports the ACPI LPC host on Hip06/Hip07.
Signed-off-by: zhichang.yuan <[email protected]> Signed-off-by: John Garry <[email protected]> Signed-off-by: Gabriele Paoloni <[email protected]> Tested-by: dann frazier <[email protected]> --- drivers/acpi/arm64/acpi_indirect_pio.c | 3 ++ drivers/bus/hisi_lpc.c | 71 ++++++++++++++++++++++++++++++++-- include/acpi/acpi_indirect_pio.h | 4 ++ 3 files changed, 75 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/arm64/acpi_indirect_pio.c b/drivers/acpi/arm64/acpi_indirect_pio.c index 7813f73..3a5ba7a 100644 --- a/drivers/acpi/arm64/acpi_indirect_pio.c +++ b/drivers/acpi/arm64/acpi_indirect_pio.c @@ -261,6 +261,9 @@ int acpi_set_logic_pio_resource(struct device *child, /* All the host devices which apply indirect-PIO can be listed here. */ static const struct acpi_device_id acpi_indirect_host_id[] = { +#ifdef CONFIG_HISILICON_LPC + {"HISI0191", INDIRECT_PIO_INFO(lpc_host_desc)}, +#endif {""}, }; diff --git a/drivers/bus/hisi_lpc.c b/drivers/bus/hisi_lpc.c index 4f3bf76..05a0a84 100644 --- a/drivers/bus/hisi_lpc.c +++ b/drivers/bus/hisi_lpc.c @@ -467,7 +467,9 @@ static int hisilpc_probe(struct platform_device *pdev) } /* register the LPC host PIO resources */ - if (!has_acpi_companion(dev)) { + if (has_acpi_companion(dev)) { + lpcdev->io_host = find_io_range_by_fwnode(dev->fwnode); + } else { struct logic_pio_hwaddr *range; range = kzalloc(sizeof(*range), GFP_KERNEL); @@ -481,13 +483,14 @@ static int hisilpc_probe(struct platform_device *pdev) ret = logic_pio_register_range(range); if (ret) { kfree(range); - dev_err(dev, "OF: register IO range FAIL!\n"); + dev_err(dev, "OF: logic_pio_register_range returned %d!\n", + ret); return -ret; } lpcdev->io_host = range; } if (!lpcdev->io_host) { - dev_err(dev, "Hisilpc IO hasn't registered!\n"); + dev_err(dev, "HiSi LPC IO hasn't been registered!\n"); return -EFAULT; } @@ -533,10 +536,72 @@ static const struct of_device_id hisilpc_of_match[] = { {}, }; +#ifdef CONFIG_ACPI +#include <acpi/acpi_indirect_pio.h> + +struct lpc_private_data { + resource_size_t io_size; + resource_size_t io_start; +}; + +static struct lpc_private_data lpc_data = { + .io_size = LPC_BUS_IO_SIZE, + .io_start = LPC_MIN_BUS_RANGE, +}; + +static int lpc_host_io_setup(struct acpi_device *adev, void *pdata) +{ + int ret = 0; + struct logic_pio_hwaddr *range; + struct lpc_private_data *lpc_private; + struct acpi_device *child; + + lpc_private = (struct lpc_private_data *)pdata; + range = kzalloc(sizeof(*range), GFP_KERNEL); + if (!range) + return -ENOMEM; + range->fwnode = &adev->fwnode; + range->flags = PIO_INDIRECT; + range->size = lpc_private->io_size; + range->hw_start = lpc_private->io_start; + + ret = logic_pio_register_range(range); + if (ret) { + kfree(range); + return ret; + } + + /* In HiSilicon lpc, only care about the children of the host. */ + list_for_each_entry(child, &adev->children, node) { + ret = acpi_set_logic_pio_resource(&child->dev, &adev->dev); + if (ret) { + dev_err(&child->dev, + "acpi_set_logic_pio_resource() returned %d\n", + ret); + return ret; + } + } + + return ret; +} + +static const struct acpi_device_id hisilpc_acpi_match[] = { + {"HISI0191", }, + {}, +}; + +const struct indirect_pio_device_desc lpc_host_desc = { + .pdata = &lpc_data, + .pre_setup = lpc_host_io_setup, +}; + +#endif + static struct platform_driver hisilpc_driver = { .driver = { .name = "hisi_lpc", .of_match_table = hisilpc_of_match, + .acpi_match_table = ACPI_PTR(hisilpc_acpi_match), }, .probe = hisilpc_probe, }; diff --git a/include/acpi/acpi_indirect_pio.h b/include/acpi/acpi_indirect_pio.h index efc5c43..7a8d26b 100644 --- a/include/acpi/acpi_indirect_pio.h +++ b/include/acpi/acpi_indirect_pio.h @@ -18,6 +18,10 @@ struct indirect_pio_device_desc { int (*pre_setup)(struct acpi_device *adev, void *pdata); }; +#ifdef CONFIG_HISILICON_LPC +extern const struct indirect_pio_device_desc lpc_host_desc; +#endif + int acpi_set_logic_pio_resource(struct device *child, struct device *hostdev); -- 2.7.4
