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author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-08-20 16:15:45 +0300 |
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committer | Vinod Koul <vkoul@kernel.org> | 2019-08-21 09:41:28 +0530 |
commit | b685fe26e9af7318d73bf50af659a282d188a3e5 (patch) | |
tree | f7e9c77ba6bb3fda5abb0b5d94d5aaef765f79f3 /drivers/dma/dw | |
parent | 84da042e702347c186b84d9cc2e766f83e1814d6 (diff) | |
download | linux-stable-b685fe26e9af7318d73bf50af659a282d188a3e5.tar.gz linux-stable-b685fe26e9af7318d73bf50af659a282d188a3e5.tar.bz2 linux-stable-b685fe26e9af7318d73bf50af659a282d188a3e5.zip |
dmaengine: dw: platform: Split ACPI helpers to separate module
For better maintenance split ACPI helpers to the separate module.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190820131546.75744-10-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/dw')
-rw-r--r-- | drivers/dma/dw/Makefile | 3 | ||||
-rw-r--r-- | drivers/dma/dw/acpi.c | 53 | ||||
-rw-r--r-- | drivers/dma/dw/internal.h | 8 | ||||
-rw-r--r-- | drivers/dma/dw/platform.c | 52 |
4 files changed, 63 insertions, 53 deletions
diff --git a/drivers/dma/dw/Makefile b/drivers/dma/dw/Makefile index 63ed895c09aa..5e69815f3cf1 100644 --- a/drivers/dma/dw/Makefile +++ b/drivers/dma/dw/Makefile @@ -3,7 +3,8 @@ obj-$(CONFIG_DW_DMAC_CORE) += dw_dmac_core.o dw_dmac_core-objs := core.o dw.o idma32.o obj-$(CONFIG_DW_DMAC) += dw_dmac.o -dw_dmac-objs := platform.o +dw_dmac-y := platform.o +dw_dmac-$(CONFIG_ACPI) += acpi.o obj-$(CONFIG_DW_DMAC_PCI) += dw_dmac_pci.o dw_dmac_pci-objs := pci.o diff --git a/drivers/dma/dw/acpi.c b/drivers/dma/dw/acpi.c new file mode 100644 index 000000000000..f6e8d55b4f6e --- /dev/null +++ b/drivers/dma/dw/acpi.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2013,2019 Intel Corporation + +#include <linux/acpi.h> +#include <linux/acpi_dma.h> + +#include "internal.h" + +static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param) +{ + struct acpi_dma_spec *dma_spec = param; + struct dw_dma_slave slave = { + .dma_dev = dma_spec->dev, + .src_id = dma_spec->slave_id, + .dst_id = dma_spec->slave_id, + .m_master = 0, + .p_master = 1, + }; + + return dw_dma_filter(chan, &slave); +} + +void dw_dma_acpi_controller_register(struct dw_dma *dw) +{ + struct device *dev = dw->dma.dev; + struct acpi_dma_filter_info *info; + int ret; + + if (!has_acpi_companion(dev)) + return; + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return; + + dma_cap_zero(info->dma_cap); + dma_cap_set(DMA_SLAVE, info->dma_cap); + info->filter_fn = dw_dma_acpi_filter; + + ret = acpi_dma_controller_register(dev, acpi_dma_simple_xlate, info); + if (ret) + dev_err(dev, "could not register acpi_dma_controller\n"); +} + +void dw_dma_acpi_controller_free(struct dw_dma *dw) +{ + struct device *dev = dw->dma.dev; + + if (!has_acpi_companion(dev)) + return; + + acpi_dma_controller_free(dev); +} diff --git a/drivers/dma/dw/internal.h b/drivers/dma/dw/internal.h index df5c84e2a4fd..acada530aa96 100644 --- a/drivers/dma/dw/internal.h +++ b/drivers/dma/dw/internal.h @@ -23,6 +23,14 @@ int do_dw_dma_enable(struct dw_dma_chip *chip); extern bool dw_dma_filter(struct dma_chan *chan, void *param); +#ifdef CONFIG_ACPI +void dw_dma_acpi_controller_register(struct dw_dma *dw); +void dw_dma_acpi_controller_free(struct dw_dma *dw); +#else /* !CONFIG_ACPI */ +static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {} +static inline void dw_dma_acpi_controller_free(struct dw_dma *dw) {} +#endif /* !CONFIG_ACPI */ + struct dw_dma_chip_pdata { const struct dw_dma_platform_data *pdata; int (*probe)(struct dw_dma_chip *chip); diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index b8514d7895d1..d50e038acb1e 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -19,7 +19,6 @@ #include <linux/of.h> #include <linux/of_dma.h> #include <linux/acpi.h> -#include <linux/acpi_dma.h> #include "internal.h" @@ -55,57 +54,6 @@ static struct dma_chan *dw_dma_of_xlate(struct of_phandle_args *dma_spec, return dma_request_channel(cap, dw_dma_filter, &slave); } -#ifdef CONFIG_ACPI -static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param) -{ - struct acpi_dma_spec *dma_spec = param; - struct dw_dma_slave slave = { - .dma_dev = dma_spec->dev, - .src_id = dma_spec->slave_id, - .dst_id = dma_spec->slave_id, - .m_master = 0, - .p_master = 1, - }; - - return dw_dma_filter(chan, &slave); -} - -static void dw_dma_acpi_controller_register(struct dw_dma *dw) -{ - struct device *dev = dw->dma.dev; - struct acpi_dma_filter_info *info; - int ret; - - if (!has_acpi_companion(dev)) - return; - - info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); - if (!info) - return; - - dma_cap_zero(info->dma_cap); - dma_cap_set(DMA_SLAVE, info->dma_cap); - info->filter_fn = dw_dma_acpi_filter; - - ret = acpi_dma_controller_register(dev, acpi_dma_simple_xlate, info); - if (ret) - dev_err(dev, "could not register acpi_dma_controller\n"); -} - -static void dw_dma_acpi_controller_free(struct dw_dma *dw) -{ - struct device *dev = dw->dma.dev; - - if (!has_acpi_companion(dev)) - return; - - acpi_dma_controller_free(dev); -} -#else /* !CONFIG_ACPI */ -static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {} -static inline void dw_dma_acpi_controller_free(struct dw_dma *dw) {} -#endif /* !CONFIG_ACPI */ - #ifdef CONFIG_OF static struct dw_dma_platform_data * dw_dma_parse_dt(struct platform_device *pdev) |