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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 08:35:12 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 08:35:12 +0300
commitfd0d351de7bbd718bc2b34d5846854831aa2b88c (patch)
treeb4630c372215deb2e17235707189f06603bee3a3 /drivers/dma
parent3d6f47801c34e42da26e2b6b29706f0bfe423978 (diff)
parente052c6d15c61cc4caff2f06cbca72b183da9f15e (diff)
downloadlinux-fd0d351de7bbd718bc2b34d5846854831aa2b88c.tar.xz
Merge tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver updates from Greg KH: "Here is the big tty and serial driver update for 4.4-rc1. Lots of serial driver updates and a few small tty core changes. Full details in the shortlog. All of these have been in linux-next for a while" * tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (148 commits) tty: Use unbound workqueue for all input workers tty: Abstract tty buffer work tty: Prevent tty teardown during tty_write_message() tty: core: Use correct spinlock flavor in tiocspgrp() tty: Combine SIGTTOU/SIGTTIN handling serial: amba-pl011: fix incorrect integer size in pl011_fifo_to_tty() ttyFDC: Fix build problems due to use of module_{init,exit} tty: remove unneeded return statement serial: 8250_mid: add support for DMA engine handling from UART MMIO dmaengine: hsu: remove platform data dmaengine: hsu: introduce stubs for the exported functions dmaengine: hsu: make the UART driver in control of selecting this driver serial: fix mctrl helper functions serial: 8250_pci: Intel MID UART support to its own driver serial: fsl_lpuart: add earlycon support tty: disable unbind for old 74xx based serial/mpsc console port serial: pl011: Spelling s/clocks-names/clock-names/ n_tty: Remove reader wakeups for TTY_BREAK/TTY_PARITY chars tty: synclink, fix indentation serial: at91, fix rs485 properties ...
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/hsu/Kconfig9
-rw-r--r--drivers/dma/hsu/hsu.c24
-rw-r--r--drivers/dma/hsu/hsu.h1
-rw-r--r--drivers/dma/hsu/pci.c2
4 files changed, 11 insertions, 25 deletions
diff --git a/drivers/dma/hsu/Kconfig b/drivers/dma/hsu/Kconfig
index 2810dca70612..c70841731a80 100644
--- a/drivers/dma/hsu/Kconfig
+++ b/drivers/dma/hsu/Kconfig
@@ -5,10 +5,5 @@ config HSU_DMA
select DMA_VIRTUAL_CHANNELS
config HSU_DMA_PCI
- tristate "High Speed UART DMA PCI driver"
- depends on PCI
- select HSU_DMA
- help
- Support the High Speed UART DMA on the platfroms that
- enumerate it as a PCI device. For example, Intel Medfield
- has integrated this HSU DMA controller.
+ tristate
+ depends on HSU_DMA && PCI
diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c
index 7669c7dd1e34..823ad728aecf 100644
--- a/drivers/dma/hsu/hsu.c
+++ b/drivers/dma/hsu/hsu.c
@@ -146,7 +146,7 @@ irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr)
u32 sr;
/* Sanity check */
- if (nr >= chip->pdata->nr_channels)
+ if (nr >= chip->hsu->nr_channels)
return IRQ_NONE;
hsuc = &chip->hsu->chan[nr];
@@ -375,7 +375,6 @@ static void hsu_dma_free_chan_resources(struct dma_chan *chan)
int hsu_dma_probe(struct hsu_dma_chip *chip)
{
struct hsu_dma *hsu;
- struct hsu_dma_platform_data *pdata = chip->pdata;
void __iomem *addr = chip->regs + chip->offset;
unsigned short i;
int ret;
@@ -386,25 +385,16 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
chip->hsu = hsu;
- if (!pdata) {
- pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
- return -ENOMEM;
+ /* Calculate nr_channels from the IO space length */
+ hsu->nr_channels = (chip->length - chip->offset) / HSU_DMA_CHAN_LENGTH;
- chip->pdata = pdata;
-
- /* Guess nr_channels from the IO space length */
- pdata->nr_channels = (chip->length - chip->offset) /
- HSU_DMA_CHAN_LENGTH;
- }
-
- hsu->chan = devm_kcalloc(chip->dev, pdata->nr_channels,
+ hsu->chan = devm_kcalloc(chip->dev, hsu->nr_channels,
sizeof(*hsu->chan), GFP_KERNEL);
if (!hsu->chan)
return -ENOMEM;
INIT_LIST_HEAD(&hsu->dma.channels);
- for (i = 0; i < pdata->nr_channels; i++) {
+ for (i = 0; i < hsu->nr_channels; i++) {
struct hsu_dma_chan *hsuc = &hsu->chan[i];
hsuc->vchan.desc_free = hsu_dma_desc_free;
@@ -440,7 +430,7 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
if (ret)
return ret;
- dev_info(chip->dev, "Found HSU DMA, %d channels\n", pdata->nr_channels);
+ dev_info(chip->dev, "Found HSU DMA, %d channels\n", hsu->nr_channels);
return 0;
}
EXPORT_SYMBOL_GPL(hsu_dma_probe);
@@ -452,7 +442,7 @@ int hsu_dma_remove(struct hsu_dma_chip *chip)
dma_async_device_unregister(&hsu->dma);
- for (i = 0; i < chip->pdata->nr_channels; i++) {
+ for (i = 0; i < hsu->nr_channels; i++) {
struct hsu_dma_chan *hsuc = &hsu->chan[i];
tasklet_kill(&hsuc->vchan.task);
diff --git a/drivers/dma/hsu/hsu.h b/drivers/dma/hsu/hsu.h
index eeb9fff66967..f06579c6d548 100644
--- a/drivers/dma/hsu/hsu.h
+++ b/drivers/dma/hsu/hsu.h
@@ -107,6 +107,7 @@ struct hsu_dma {
/* channels */
struct hsu_dma_chan *chan;
+ unsigned short nr_channels;
};
static inline struct hsu_dma *to_hsu_dma(struct dma_device *ddev)
diff --git a/drivers/dma/hsu/pci.c b/drivers/dma/hsu/pci.c
index 77879e6ddc4c..e2db76bd56d8 100644
--- a/drivers/dma/hsu/pci.c
+++ b/drivers/dma/hsu/pci.c
@@ -31,7 +31,7 @@ static irqreturn_t hsu_pci_irq(int irq, void *dev)
irqreturn_t ret = IRQ_NONE;
dmaisr = readl(chip->regs + HSU_PCI_DMAISR);
- for (i = 0; i < chip->pdata->nr_channels; i++) {
+ for (i = 0; i < chip->hsu->nr_channels; i++) {
if (dmaisr & 0x1)
ret |= hsu_dma_irq(chip, i);
dmaisr >>= 1;