spi: dw-pci: Add support for Intel Elkhart Lake PSE SPI

Add support for Intel(R) Programmable Services Engine (Intel(R) PSE) SPI
controller in Intel Elkhart Lake when interface is assigned to the host
processor.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20190812101344.3975-1-jarkko.nikula@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
index 9651679ee7f7330a7f68ca469fb7d43226dfb515..e9ba638145486092574ede2eb20a92a9530564eb 100644 (file)
--- a/drivers/spi/spi-dw-pci.c
+++ b/drivers/spi/spi-dw-pci.c
@@ -19,6 +19,7 @@ struct spi_pci_desc {
        int     (*setup)(struct dw_spi *);
        u16     num_cs;
        u16     bus_num;
+       u32     max_freq;
 };
 
 static struct spi_pci_desc spi_pci_mid_desc_1 = {
@@ -33,6 +34,12 @@ static struct spi_pci_desc spi_pci_mid_desc_2 = {
        .bus_num = 1,
 };
 
+static struct spi_pci_desc spi_pci_ehl_desc = {
+       .num_cs = 1,
+       .bus_num = -1,
+       .max_freq = 100000000,
+};
+
 static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
        struct dw_spi *dws;
@@ -65,6 +72,7 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (desc) {
                dws->num_cs = desc->num_cs;
                dws->bus_num = desc->bus_num;
+               dws->max_freq = desc->max_freq;
 
                if (desc->setup) {
                        ret = desc->setup(dws);
@@ -125,6 +133,11 @@ static const struct pci_device_id pci_ids[] = {
        { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
        /* Intel MID platform SPI controller 2 */
        { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
+       /* Intel Elkhart Lake PSE SPI controllers */
+       { PCI_VDEVICE(INTEL, 0x4b84), (kernel_ulong_t)&spi_pci_ehl_desc},
+       { PCI_VDEVICE(INTEL, 0x4b85), (kernel_ulong_t)&spi_pci_ehl_desc},
+       { PCI_VDEVICE(INTEL, 0x4b86), (kernel_ulong_t)&spi_pci_ehl_desc},
+       { PCI_VDEVICE(INTEL, 0x4b87), (kernel_ulong_t)&spi_pci_ehl_desc},
        {},
 };