blob: fcbbeed7dc853474fd77bbf05a89b5e90f466096 [file] [log] [blame]
From 50fef689bcf05080c672ffdf30c05e491afcf8b0 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Mon, 13 May 2013 13:45:10 +0300
Subject: spi/pxa2xx: convert to dma_request_slave_channel_compat()
Now that we have these nice DMA API helper functions we can take advantage
of those instead of open-coding the channel/request line extraction from
ACPI. Use the _compat version which still allows passing the
channel/request line from platform data.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
(cherry picked from commit cddb339badb03dd96a5272195eec17e7899df154)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
drivers/spi/spi-pxa2xx-dma.c | 11 ++++++-----
drivers/spi/spi-pxa2xx.c | 34 ++--------------------------------
2 files changed, 8 insertions(+), 37 deletions(-)
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -327,22 +327,23 @@ void pxa2xx_spi_dma_start(struct driver_
int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
{
struct pxa2xx_spi_master *pdata = drv_data->master_info;
+ struct device *dev = &drv_data->pdev->dev;
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- drv_data->dummy = devm_kzalloc(&drv_data->pdev->dev, SZ_2K, GFP_KERNEL);
+ drv_data->dummy = devm_kzalloc(dev, SZ_2K, GFP_KERNEL);
if (!drv_data->dummy)
return -ENOMEM;
- drv_data->tx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
- pdata);
+ drv_data->tx_chan = dma_request_slave_channel_compat(mask,
+ pxa2xx_spi_dma_filter, pdata, dev, "tx");
if (!drv_data->tx_chan)
return -ENODEV;
- drv_data->rx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
- pdata);
+ drv_data->rx_chan = dma_request_slave_channel_compat(mask,
+ pxa2xx_spi_dma_filter, pdata, dev, "rx");
if (!drv_data->rx_chan) {
dma_release_channel(drv_data->tx_chan);
drv_data->tx_chan = NULL;
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1044,32 +1044,10 @@ static void cleanup(struct spi_device *s
}
#ifdef CONFIG_ACPI
-static int pxa2xx_spi_acpi_add_dma(struct acpi_resource *res, void *data)
-{
- struct pxa2xx_spi_master *pdata = data;
-
- if (res->type == ACPI_RESOURCE_TYPE_FIXED_DMA) {
- const struct acpi_resource_fixed_dma *dma;
-
- dma = &res->data.fixed_dma;
- if (pdata->tx_slave_id < 0) {
- pdata->tx_slave_id = dma->request_lines;
- pdata->tx_chan_id = dma->channels;
- } else if (pdata->rx_slave_id < 0) {
- pdata->rx_slave_id = dma->request_lines;
- pdata->rx_chan_id = dma->channels;
- }
- }
-
- /* Tell the ACPI core to skip this resource */
- return 1;
-}
-
static struct pxa2xx_spi_master *
pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
{
struct pxa2xx_spi_master *pdata;
- struct list_head resource_list;
struct acpi_device *adev;
struct ssp_device *ssp;
struct resource *res;
@@ -1107,15 +1085,7 @@ pxa2xx_spi_acpi_get_pdata(struct platfor
ssp->port_id = devid;
pdata->num_chipselect = 1;
- pdata->rx_slave_id = -1;
- pdata->tx_slave_id = -1;
-
- INIT_LIST_HEAD(&resource_list);
- acpi_dev_get_resources(adev, &resource_list, pxa2xx_spi_acpi_add_dma,
- pdata);
- acpi_dev_free_resource_list(&resource_list);
-
- pdata->enable_dma = pdata->rx_slave_id >= 0 && pdata->tx_slave_id >= 0;
+ pdata->enable_dma = true;
return pdata;
}
@@ -1218,7 +1188,7 @@ static int pxa2xx_spi_probe(struct platf
if (platform_info->enable_dma) {
status = pxa2xx_spi_dma_setup(drv_data);
if (status) {
- dev_warn(dev, "failed to setup DMA, using PIO\n");
+ dev_dbg(dev, "no DMA channels available, using PIO\n");
platform_info->enable_dma = false;
}
}