powerpc/fsl_soc: isolate legacy fsl_spi support to mpc832x_rdb boards

The advantages of this:
- Don't encourage legacy support;
- Less external symbols, less code to compile-in for !MPC832x_RDB
  platforms.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 107 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/83xx/mpc832x_rdb.c b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
index e1e7eeb7d3a3..567ded7c3b9b 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
@@ -20,6 +20,7 @@
 #include <linux/spi/mmc_spi.h>
 #include <linux/mmc/host.h>
 #include <linux/of_platform.h>
+#include <linux/fsl_devices.h>
 
 #include <asm/time.h>
 #include <asm/ipic.h>
@@ -39,6 +40,112 @@
 #endif
 
 #ifdef CONFIG_QUICC_ENGINE
+static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
+                                   struct spi_board_info *board_infos,
+                                   unsigned int num_board_infos,
+                                   void (*cs_control)(struct spi_device *dev,
+                                                      bool on))
+{
+        struct device_node *np;
+        unsigned int i = 0;
+
+        for_each_compatible_node(np, type, compatible) {
+                int ret;
+                unsigned int j;
+                const void *prop;
+                struct resource res[2];
+                struct platform_device *pdev;
+                struct fsl_spi_platform_data pdata = {
+                        .cs_control = cs_control,
+                };
+
+                memset(res, 0, sizeof(res));
+
+                pdata.sysclk = sysclk;
+
+                prop = of_get_property(np, "reg", NULL);
+                if (!prop)
+                        goto err;
+                pdata.bus_num = *(u32 *)prop;
+
+                prop = of_get_property(np, "cell-index", NULL);
+                if (prop)
+                        i = *(u32 *)prop;
+
+                prop = of_get_property(np, "mode", NULL);
+                if (prop && !strcmp(prop, "cpu-qe"))
+                        pdata.qe_mode = 1;
+
+                for (j = 0; j < num_board_infos; j++) {
+                        if (board_infos[j].bus_num == pdata.bus_num)
+                                pdata.max_chipselect++;
+                }
+
+                if (!pdata.max_chipselect)
+                        continue;
+
+                ret = of_address_to_resource(np, 0, &res[0]);
+                if (ret)
+                        goto err;
+
+                ret = of_irq_to_resource(np, 0, &res[1]);
+                if (ret == NO_IRQ)
+                        goto err;
+
+                pdev = platform_device_alloc("mpc83xx_spi", i);
+                if (!pdev)
+                        goto err;
+
+                ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
+                if (ret)
+                        goto unreg;
+
+                ret = platform_device_add_resources(pdev, res,
+                                                    ARRAY_SIZE(res));
+                if (ret)
+                        goto unreg;
+
+                ret = platform_device_add(pdev);
+                if (ret)
+                        goto unreg;
+
+                goto next;
+unreg:
+                platform_device_del(pdev);
+err:
+                pr_err("%s: registration failed\n", np->full_name);
+next:
+                i++;
+        }
+
+        return i;
+}
+
+static int __init fsl_spi_init(struct spi_board_info *board_infos,
+                               unsigned int num_board_infos,
+                               void (*cs_control)(struct spi_device *spi,
+                                                  bool on))
+{
+        u32 sysclk = -1;
+        int ret;
+
+        /* SPI controller is either clocked from QE or SoC clock */
+        sysclk = get_brgfreq();
+        if (sysclk == -1) {
+                sysclk = fsl_get_sys_freq();
+                if (sysclk == -1)
+                        return -ENODEV;
+        }
+
+        ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
+                               num_board_infos, cs_control);
+        if (!ret)
+                of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
+                                 num_board_infos, cs_control);
+
+        return spi_register_board_info(board_infos, num_board_infos);
+}
+
 static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
 {
         pr_debug("%s %d %d\n", __func__, spi->chip_select, on);