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spi: pxa2xx: Differentiate Intel LPSS types 

Intel LPSS SPI properties differ between between platforms. Now private
registers offset 0x400 or 0x800 is autodetected but there is need to
support also other offset and handle a few other differences.

Prepare for that by splitting the LPSS_SSP type into compatible hardware
types and set it now based on PCI or ACPI ID. That type will be used to set
properties that differ between current and upcoming platforms.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jarkko Nikula 2015-06-04 16:55:10 +03:00 committed by Mark Brown
parent b787f68c36
commit 03fbf488ce
3 changed files with 36 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/spi/spi-pxa2xx-pci.c
View File

@ -62,7 +62,7 @@ static struct pxa_spi_info spi_info_configs[] = {
.max_clk_rate = 3686400,
},
[PORT_BYT] = {
.type = LPSS_SSP,
.type = LPSS_BYT_SSP,
.port_id = 0,
.num_chipselect = 1,
.max_clk_rate = 50000000,
@ -70,7 +70,7 @@ static struct pxa_spi_info spi_info_configs[] = {
.rx_param = &byt_rx_param,
},
[PORT_BSW0] = {
.type = LPSS_SSP,
.type = LPSS_BYT_SSP,
.port_id = 0,
.num_chipselect = 1,
.max_clk_rate = 50000000,
@ -78,7 +78,7 @@ static struct pxa_spi_info spi_info_configs[] = {
.rx_param = &bsw0_rx_param,
},
[PORT_BSW1] = {
.type = LPSS_SSP,
.type = LPSS_BYT_SSP,
.port_id = 1,
.num_chipselect = 1,
.max_clk_rate = 50000000,
@ -86,7 +86,7 @@ static struct pxa_spi_info spi_info_configs[] = {
.rx_param = &bsw1_rx_param,
},
[PORT_BSW2] = {
.type = LPSS_SSP,
.type = LPSS_BYT_SSP,
.port_id = 2,
.num_chipselect = 1,
.max_clk_rate = 50000000,

44
drivers/spi/spi-pxa2xx.c
View File

@ -74,7 +74,13 @@ MODULE_ALIAS("platform:pxa2xx-spi");
static bool is_lpss_ssp(const struct driver_data *drv_data)
{
return drv_data->ssp_type == LPSS_SSP;
switch (drv_data->ssp_type) {
case LPSS_LPT_SSP:
case LPSS_BYT_SSP:
return true;
default:
return false;
}
}
static bool is_quark_x1000_ssp(const struct driver_data *drv_data)
@ -1085,7 +1091,8 @@ static int setup(struct spi_device *spi)
tx_hi_thres = 0;
rx_thres = RX_THRESH_QUARK_X1000_DFLT;
break;
case LPSS_SSP:
case LPSS_LPT_SSP:
case LPSS_BYT_SSP:
tx_thres = LPSS_TX_LOTHRESH_DFLT;
tx_hi_thres = LPSS_TX_HITHRESH_DFLT;
rx_thres = LPSS_RX_THRESH_DFLT;
@ -1242,6 +1249,18 @@ static void cleanup(struct spi_device *spi)
}
#ifdef CONFIG_ACPI
static struct acpi_device_id pxa2xx_spi_acpi_match[] = {
{ "INT33C0", LPSS_LPT_SSP },
{ "INT33C1", LPSS_LPT_SSP },
{ "INT3430", LPSS_LPT_SSP },
{ "INT3431", LPSS_LPT_SSP },
{ "80860F0E", LPSS_BYT_SSP },
{ "8086228E", LPSS_BYT_SSP },
{ },
};
MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_match);
static struct pxa2xx_spi_master *
pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
{
@ -1249,12 +1268,19 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
struct acpi_device *adev;
struct ssp_device *ssp;
struct resource *res;
int devid;
const struct acpi_device_id *id;
int devid, type;
if (!ACPI_HANDLE(&pdev->dev) ||
acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev))
return NULL;
id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
if (id)
type = (int)id->driver_data;
else
return NULL;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
@ -1272,7 +1298,7 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
ssp->clk = devm_clk_get(&pdev->dev, NULL);
ssp->irq = platform_get_irq(pdev, 0);
ssp->type = LPSS_SSP;
ssp->type = type;
ssp->pdev = pdev;
ssp->port_id = -1;
@ -1285,16 +1311,6 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
return pdata;
}
static struct acpi_device_id pxa2xx_spi_acpi_match[] = {
{ "INT33C0", 0 },
{ "INT33C1", 0 },
{ "INT3430", 0 },
{ "INT3431", 0 },
{ "80860F0E", 0 },
{ "8086228E", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_match);
#else
static inline struct pxa2xx_spi_master *
pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)

3
include/linux/pxa2xx_ssp.h
View File

@ -194,8 +194,9 @@ enum pxa_ssp_type {
PXA168_SSP,
PXA910_SSP,
CE4100_SSP,
LPSS_SSP,
QUARK_X1000_SSP,
LPSS_LPT_SSP,
LPSS_BYT_SSP,
};
struct ssp_device {