spi: spi_bfin uses portmux for additional busses

Use portmux mechanism to support SPI busses 1 and 2, instead of just the
original bus 0.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index a8311a8..045d3ec 100644 (file)
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -209,17 +209,26 @@ static void cs_deactive(struct chip_data *chip)
        write_FLAG(flag);
 }
 
-#define MAX_SPI0_SSEL  7
+#define MAX_SPI_SSEL   7
 
 /* stop controller and re-config current chip*/
 static int restore_state(struct driver_data *drv_data)
 {
        struct chip_data *chip = drv_data->cur_chip;
        int ret = 0;
-       u16 ssel[MAX_SPI0_SSEL] = {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
-                                       P_SPI0_SSEL4, P_SPI0_SSEL5,
-                                       P_SPI0_SSEL6, P_SPI0_SSEL7,};
-
+       u16 ssel[3][MAX_SPI_SSEL] = {
+               {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
+               P_SPI0_SSEL4, P_SPI0_SSEL5,
+               P_SPI0_SSEL6, P_SPI0_SSEL7},
+
+               {P_SPI1_SSEL1, P_SPI1_SSEL2, P_SPI1_SSEL3,
+               P_SPI1_SSEL4, P_SPI1_SSEL5,
+               P_SPI1_SSEL6, P_SPI1_SSEL7},
+
+               {P_SPI2_SSEL1, P_SPI2_SSEL2, P_SPI2_SSEL3,
+               P_SPI2_SSEL4, P_SPI2_SSEL5,
+               P_SPI2_SSEL6, P_SPI2_SSEL7},
+       };
        /* Clear status and disable clock */
        write_STAT(BIT_STAT_CLR);
        bfin_spi_disable(drv_data);
@@ -234,9 +243,9 @@ static int restore_state(struct driver_data *drv_data)
                int i = chip->chip_select_num;
 
                dev_dbg(&drv_data->pdev->dev, "chip select number is %d\n", i);
-
-               if ((i > 0) && (i <= MAX_SPI0_SSEL))
-                       ret = peripheral_request(ssel[i-1], DRV_NAME);
+               if ((i > 0) && (i <= MAX_SPI_SSEL))
+                       ret = peripheral_request(
+                               ssel[drv_data->master->bus_num][i-1], DRV_NAME);
 
                chip->chip_select_requested = 1;
        }
@@ -329,7 +338,6 @@ static void u8_reader(struct driver_data *drv_data)
        write_TDBR(0xFFFF);
 
        dummy_read();
-
        while (drv_data->rx < drv_data->rx_end - 1) {
                while (!(read_STAT() & BIT_STAT_RXS))
                        continue;
@@ -640,7 +648,6 @@ static void pump_transfers(unsigned long data)
        message = drv_data->cur_msg;
        transfer = drv_data->cur_transfer;
        chip = drv_data->cur_chip;
-
        /*
         * if msg is error or done, report it back using complete() callback
         */
@@ -1206,16 +1213,20 @@ static inline int destroy_queue(struct driver_data *drv_data)
        return 0;
 }
 
-static int setup_pin_mux(int action)
+static int setup_pin_mux(int action, int bus_num)
 {
 
-       u16 pin_req[] = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0};
+       u16 pin_req[3][4] = {
+               {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0},
+               {P_SPI1_SCK, P_SPI1_MISO, P_SPI1_MOSI, 0},
+               {P_SPI2_SCK, P_SPI2_MISO, P_SPI2_MOSI, 0},
+       };
 
        if (action) {
-               if (peripheral_request_list(pin_req, DRV_NAME))
+               if (peripheral_request_list(pin_req[bus_num], DRV_NAME))
                        return -EFAULT;
        } else {
-               peripheral_free_list(pin_req);
+               peripheral_free_list(pin_req[bus_num]);
        }
 
        return 0;
@@ -1239,11 +1250,6 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
                return -ENOMEM;
        }
 
-       if (setup_pin_mux(1)) {
-               dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
-               goto out_error;
-       }
-
        drv_data = spi_master_get_devdata(master);
        drv_data->master = master;
        drv_data->master_info = platform_info;
@@ -1298,6 +1304,11 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
                goto out_error_queue_alloc;
        }
 
+       if (setup_pin_mux(1, master->bus_num)) {
+               dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
+               goto out_error;
+       }
+
        dev_info(dev, "%s, Version %s, regs_base @ 0x%08x\n",
                DRV_DESC, DRV_VERSION, spi_regs_base);
        return status;
@@ -1340,7 +1351,7 @@ static int __devexit bfin5xx_spi_remove(struct platform_device *pdev)
        /* Disconnect from the SPI framework */
        spi_unregister_master(drv_data->master);
 
-       setup_pin_mux(0);
+       setup_pin_mux(0, drv_data->master->bus_num);
 
        /* Prevent double remove */
        platform_set_drvdata(pdev, NULL);