spi: pxa2xx-pci: Do a specific setup in a separate function

Move LPSS specific setup to a separate function. It makes ->probe() cleaner as
well as allows extend the driver for different variation of hardware in the
future, e.g. for Intel Merrifield.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index 5202de9..8d58598 100644 (file)
--- a/drivers/spi/spi-pxa2xx-pci.c
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -29,8 +29,11 @@ struct pxa_spi_info {
        unsigned long max_clk_rate;
 
        /* DMA channel request parameters */
+       bool (*dma_filter)(struct dma_chan *chan, void *param);
        void *tx_param;
        void *rx_param;
+
+       int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
 };
 
 static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
@@ -57,6 +60,35 @@ static bool lpss_dma_filter(struct dma_chan *chan, void *param)
        return true;
 }
 
+static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
+{
+       struct pci_dev *dma_dev;
+
+       c->num_chipselect = 1;
+       c->max_clk_rate = 50000000;
+
+       dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+
+       if (c->tx_param) {
+               struct dw_dma_slave *slave = c->tx_param;
+
+               slave->dma_dev = &dma_dev->dev;
+               slave->m_master = 0;
+               slave->p_master = 1;
+       }
+
+       if (c->rx_param) {
+               struct dw_dma_slave *slave = c->rx_param;
+
+               slave->dma_dev = &dma_dev->dev;
+               slave->m_master = 0;
+               slave->p_master = 1;
+       }
+
+       c->dma_filter = lpss_dma_filter;
+       return 0;
+}
+
 static struct pxa_spi_info spi_info_configs[] = {
        [PORT_CE4100] = {
                .type = PXA25x_SSP,
@@ -67,32 +99,28 @@ static struct pxa_spi_info spi_info_configs[] = {
        [PORT_BYT] = {
                .type = LPSS_BYT_SSP,
                .port_id = 0,
-               .num_chipselect = 1,
-               .max_clk_rate = 50000000,
+               .setup = lpss_spi_setup,
                .tx_param = &byt_tx_param,
                .rx_param = &byt_rx_param,
        },
        [PORT_BSW0] = {
                .type = LPSS_BYT_SSP,
                .port_id = 0,
-               .num_chipselect = 1,
-               .max_clk_rate = 50000000,
+               .setup = lpss_spi_setup,
                .tx_param = &bsw0_tx_param,
                .rx_param = &bsw0_rx_param,
        },
        [PORT_BSW1] = {
                .type = LPSS_BYT_SSP,
                .port_id = 1,
-               .num_chipselect = 1,
-               .max_clk_rate = 50000000,
+               .setup = lpss_spi_setup,
                .tx_param = &bsw1_tx_param,
                .rx_param = &bsw1_rx_param,
        },
        [PORT_BSW2] = {
                .type = LPSS_BYT_SSP,
                .port_id = 2,
-               .num_chipselect = 1,
-               .max_clk_rate = 50000000,
+               .setup = lpss_spi_setup,
                .tx_param = &bsw2_tx_param,
                .rx_param = &bsw2_rx_param,
        },
@@ -105,8 +133,7 @@ static struct pxa_spi_info spi_info_configs[] = {
        [PORT_LPT] = {
                .type = LPSS_LPT_SSP,
                .port_id = 0,
-               .num_chipselect = 1,
-               .max_clk_rate = 50000000,
+               .setup = lpss_spi_setup,
                .tx_param = &lpt_tx_param,
                .rx_param = &lpt_rx_param,
        },
@@ -122,7 +149,6 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
        struct ssp_device *ssp;
        struct pxa_spi_info *c;
        char buf[40];
-       struct pci_dev *dma_dev;
 
        ret = pcim_enable_device(dev);
        if (ret)
@@ -133,30 +159,15 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
                return ret;
 
        c = &spi_info_configs[ent->driver_data];
-
-       memset(&spi_pdata, 0, sizeof(spi_pdata));
-       spi_pdata.num_chipselect = (c->num_chipselect > 0) ?
-                                       c->num_chipselect : dev->devfn;
-
-       dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-
-       if (c->tx_param) {
-               struct dw_dma_slave *slave = c->tx_param;
-
-               slave->dma_dev = &dma_dev->dev;
-               slave->m_master = 0;
-               slave->p_master = 1;
-       }
-
-       if (c->rx_param) {
-               struct dw_dma_slave *slave = c->rx_param;
-
-               slave->dma_dev = &dma_dev->dev;
-               slave->m_master = 0;
-               slave->p_master = 1;
+       if (c->setup) {
+               ret = c->setup(dev, c);
+               if (ret)
+                       return ret;
        }
 
-       spi_pdata.dma_filter = lpss_dma_filter;
+       memset(&spi_pdata, 0, sizeof(spi_pdata));
+       spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
+       spi_pdata.dma_filter = c->dma_filter;
        spi_pdata.tx_param = c->tx_param;
        spi_pdata.rx_param = c->rx_param;
        spi_pdata.enable_dma = c->rx_param && c->tx_param;