9 files changed, 170 insertions, 69 deletions

diff --git a/arch/powerpc/platforms/52xx/Kconfig b/arch/powerpc/platforms/52xx/Kconfig
index 733a8063d400..515f244c90bb 100644
--- a/arch/powerpc/platforms/52xx/Kconfig
+++ b/arch/powerpc/platforms/52xx/Kconfig
@@ -1,31 +1,14 @@
 config PPC_MPC52xx
-        bool
+        bool "52xx-based boards"
+        depends on PPC_MULTIPLATFORM && PPC32
         select FSL_SOC
         select PPC_CLOCK
-        default n
-
-config PPC_MPC5200
-        bool
-        select PPC_MPC52xx
-        default n
-
-config PPC_MPC5200_BUGFIX
-        bool "MPC5200 (L25R) bugfix support"
-        depends on PPC_MPC5200
-        default n
-        help
-          Enable workarounds for original MPC5200 errata.  This is not required
-          for MPC5200B based boards.
-
-          It is safe to say 'Y' here
 
 config PPC_MPC5200_SIMPLE
         bool "Generic support for simple MPC5200 based boards"
-        depends on PPC_MULTIPLATFORM && PPC32
-        select PPC_MPC5200
+        depends on PPC_MPC52xx
         select DEFAULT_UIMAGE
         select WANT_DEVICE_TREE
-        default n
         help
           This option enables support for a simple MPC52xx based boards which
           do not need a custom platform specific setup. Such boards are
@@ -43,17 +26,23 @@ config PPC_MPC5200_SIMPLE
 
 config PPC_EFIKA
         bool "bPlan Efika 5k2. MPC5200B based computer"
-        depends on PPC_MULTIPLATFORM && PPC32
+        depends on PPC_MPC52xx
         select PPC_RTAS
         select RTAS_PROC
-        select PPC_MPC52xx
         select PPC_NATIVE
-        default n
 
 config PPC_LITE5200
         bool "Freescale Lite5200 Eval Board"
-        depends on PPC_MULTIPLATFORM && PPC32
-        select PPC_MPC5200
+        depends on PPC_MPC52xx
         select DEFAULT_UIMAGE
         select WANT_DEVICE_TREE
-        default n
+
+config PPC_MPC5200_BUGFIX
+        bool "MPC5200 (L25R) bugfix support"
+        depends on PPC_MPC52xx
+        help
+          Enable workarounds for original MPC5200 errata.  This is not required
+          for MPC5200B based boards.
+
+          It is safe to say 'Y' here
+
diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
index a0da70c8b502..a2068faef6ea 100644
--- a/arch/powerpc/platforms/52xx/efika.c
+++ b/arch/powerpc/platforms/52xx/efika.c
@@ -180,6 +180,9 @@ static void __init efika_setup_arch(void)
 {
         rtas_initialize();
 
+        /* Map important registers from the internal memory map */
+        mpc52xx_map_common_devices();
+
         efika_pcisetup();
 
 #ifdef CONFIG_PM
diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c
index 5a8d190f53e4..956f459e175c 100644
--- a/arch/powerpc/platforms/52xx/lite5200.c
+++ b/arch/powerpc/platforms/52xx/lite5200.c
@@ -32,6 +32,19 @@
  *
  */
 
+/* mpc5200 device tree match tables */
+static struct of_device_id mpc5200_cdm_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-cdm", },
+        { .compatible = "mpc5200-cdm", },
+        {}
+};
+
+static struct of_device_id mpc5200_gpio_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-gpio", },
+        { .compatible = "mpc5200-gpio", },
+        {}
+};
+
 /*
  * Fix clock configuration.
  *
@@ -44,9 +57,8 @@ lite5200_fix_clock_config(void)
 {
         struct device_node *np;
         struct mpc52xx_cdm  __iomem *cdm;
-
         /* Map zones */
-        np = of_find_compatible_node(NULL, NULL, "mpc5200-cdm");
+        np = of_find_matching_node(NULL, mpc5200_cdm_ids);
         cdm = of_iomap(np, 0);
         of_node_put(np);
         if (!cdm) {
@@ -81,7 +93,7 @@ lite5200_fix_port_config(void)
         struct mpc52xx_gpio __iomem *gpio;
         u32 port_config;
 
-        np = of_find_compatible_node(NULL, NULL, "mpc5200-gpio");
+        np = of_find_matching_node(NULL, mpc5200_gpio_ids);
         gpio = of_iomap(np, 0);
         of_node_put(np);
         if (!gpio) {
@@ -140,15 +152,15 @@ static void __init lite5200_setup_arch(void)
         if (ppc_md.progress)
                 ppc_md.progress("lite5200_setup_arch()", 0);
 
-        /* Fix things that firmware should have done. */
-        lite5200_fix_clock_config();
-        lite5200_fix_port_config();
+        /* Map important registers from the internal memory map */
+        mpc52xx_map_common_devices();
 
         /* Some mpc5200 & mpc5200b related configuration */
         mpc5200_setup_xlb_arbiter();
 
-        /* Map wdt for mpc52xx_restart() */
-        mpc52xx_map_wdt();
+        /* Fix things that firmware should have done. */
+        lite5200_fix_clock_config();
+        lite5200_fix_port_config();
 
 #ifdef CONFIG_PM
         mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
diff --git a/arch/powerpc/platforms/52xx/lite5200_pm.c b/arch/powerpc/platforms/52xx/lite5200_pm.c
index c3ada1e340d2..c0f13e8deb0b 100644
--- a/arch/powerpc/platforms/52xx/lite5200_pm.c
+++ b/arch/powerpc/platforms/52xx/lite5200_pm.c
@@ -43,6 +43,13 @@ static int lite5200_pm_set_target(suspend_state_t state)
 static int lite5200_pm_prepare(void)
 {
         struct device_node *np;
+        const struct of_device_id immr_ids[] = {
+                { .compatible = "fsl,mpc5200-immr", },
+                { .compatible = "fsl,mpc5200b-immr", },
+                { .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
+                { .type = "builtin", .compatible = "mpc5200", }, /* efika */
+                {}
+        };
 
         /* deep sleep? let mpc52xx code handle that */
         if (lite5200_pm_target_state == PM_SUSPEND_STANDBY)
@@ -52,7 +59,7 @@ static int lite5200_pm_prepare(void)
                 return -EINVAL;
 
         /* map registers */
-        np = of_find_compatible_node(NULL, NULL, "mpc5200");
+        np = of_find_matching_node(NULL, immr_ids);
         mbar = of_iomap(np, 0);
         of_node_put(np);
         if (!mbar) {
diff --git a/arch/powerpc/platforms/52xx/mpc5200_simple.c b/arch/powerpc/platforms/52xx/mpc5200_simple.c
index 754aa932f595..c48b82bc2aad 100644
--- a/arch/powerpc/platforms/52xx/mpc5200_simple.c
+++ b/arch/powerpc/platforms/52xx/mpc5200_simple.c
@@ -39,12 +39,12 @@ static void __init mpc5200_simple_setup_arch(void)
         if (ppc_md.progress)
                 ppc_md.progress("mpc5200_simple_setup_arch()", 0);
 
+        /* Map important registers from the internal memory map */
+        mpc52xx_map_common_devices();
+
         /* Some mpc5200 & mpc5200b related configuration */
         mpc5200_setup_xlb_arbiter();
 
-        /* Map wdt for mpc52xx_restart() */
-        mpc52xx_map_wdt();
-
         mpc52xx_setup_pci();
 }
 
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c
index 66955937be2a..9aa4425d80b2 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_common.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c
@@ -13,18 +13,38 @@
 #undef DEBUG
 
 #include <linux/kernel.h>
+#include <linux/spinlock.h>
 #include <linux/of_platform.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/mpc52xx.h>
 
+/* MPC5200 device tree match tables */
+static struct of_device_id mpc52xx_xlb_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-xlb", },
+        { .compatible = "mpc5200-xlb", },
+        {}
+};
+static struct of_device_id mpc52xx_bus_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-immr", },
+        { .compatible = "fsl,mpc5200b-immr", },
+        { .compatible = "fsl,lpb", },
+
+        /* depreciated matches; shouldn't be used in new device trees */
+        { .type = "builtin", .compatible = "mpc5200", }, /* efika */
+        { .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
+        {}
+};
+
 /*
  * This variable is mapped in mpc52xx_map_wdt() and used in mpc52xx_restart().
  * Permanent mapping is required because mpc52xx_restart() can be called
  * from interrupt context while node mapping (which calls ioremap())
  * cannot be used at such point.
  */
-static volatile struct mpc52xx_gpt *mpc52xx_wdt = NULL;
+static spinlock_t mpc52xx_lock = SPIN_LOCK_UNLOCKED;
+static struct mpc52xx_gpt __iomem *mpc52xx_wdt;
+static struct mpc52xx_cdm __iomem *mpc52xx_cdm;
 
 /**
  *      mpc52xx_find_ipb_freq - Find the IPB bus frequency for a device
@@ -65,7 +85,7 @@ mpc5200_setup_xlb_arbiter(void)
         struct device_node *np;
         struct mpc52xx_xlb  __iomem *xlb;
 
-        np = of_find_compatible_node(NULL, NULL, "mpc5200-xlb");
+        np = of_find_matching_node(NULL, mpc52xx_xlb_ids);
         xlb = of_iomap(np, 0);
         of_node_put(np);
         if (!xlb) {
@@ -88,16 +108,11 @@ mpc5200_setup_xlb_arbiter(void)
         iounmap(xlb);
 }
 
-static struct of_device_id mpc52xx_bus_ids[] __initdata= {
-        { .compatible = "fsl,mpc5200-immr", },
-        { .compatible = "fsl,lpb", },
-
-        /* depreciated matches; shouldn't be used in new device trees */
-        { .type = "builtin", .compatible = "mpc5200", }, /* efika */
-        { .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
-        {},
-};
-
+/**
+ * mpc52xx_declare_of_platform_devices: register internal devices and children
+ *                                      of the localplus bus to the of_platform
+ *                                      bus.
+ */
 void __init
 mpc52xx_declare_of_platform_devices(void)
 {
@@ -107,35 +122,87 @@ mpc52xx_declare_of_platform_devices(void)
                         "Error while probing of_platform bus\n");
 }
 
+/*
+ * match tables used by mpc52xx_map_common_devices()
+ */
+static struct of_device_id mpc52xx_gpt_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-gpt", },
+        { .compatible = "mpc5200-gpt", }, /* old */
+        {}
+};
+static struct of_device_id mpc52xx_cdm_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-cdm", },
+        { .compatible = "mpc5200-cdm", }, /* old */
+        {}
+};
+
+/**
+ * mpc52xx_map_common_devices: iomap devices required by common code
+ */
 void __init
-mpc52xx_map_wdt(void)
+mpc52xx_map_common_devices(void)
 {
-        const void *has_wdt;
         struct device_node *np;
 
         /* mpc52xx_wdt is mapped here and used in mpc52xx_restart,
          * possibly from a interrupt context. wdt is only implement
          * on a gpt0, so check has-wdt property before mapping.
          */
-        for_each_compatible_node(np, NULL, "fsl,mpc5200-gpt") {
-                has_wdt = of_get_property(np, "fsl,has-wdt", NULL);
-                if (has_wdt) {
+        for_each_matching_node(np, mpc52xx_gpt_ids) {
+                if (of_get_property(np, "fsl,has-wdt", NULL) ||
+                    of_get_property(np, "has-wdt", NULL)) {
                         mpc52xx_wdt = of_iomap(np, 0);
                         of_node_put(np);
-                        return;
+                        break;
                 }
         }
-        for_each_compatible_node(np, NULL, "mpc5200-gpt") {
-                has_wdt = of_get_property(np, "has-wdt", NULL);
-                if (has_wdt) {
-                        mpc52xx_wdt = of_iomap(np, 0);
-                        of_node_put(np);
-                        return;
-                }
 
+        /* Clock Distribution Module, used by PSC clock setting function */
+        np = of_find_matching_node(NULL, mpc52xx_cdm_ids);
+        mpc52xx_cdm = of_iomap(np, 0);
+        of_node_put(np);
+}
+
+/**
+ * mpc52xx_set_psc_clkdiv: Set clock divider in the CDM for PSC ports
+ *
+ * @psc_id: id of psc port; must be 1,2,3 or 6
+ * @clkdiv: clock divider value to put into CDM PSC register.
+ */
+int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv)
+{
+        unsigned long flags;
+        u16 __iomem *reg;
+        u32 val;
+        u32 mask;
+        u32 mclken_div;
+
+        if (!mpc52xx_cdm)
+                return -ENODEV;
+
+        mclken_div = 0x8000 | (clkdiv & 0x1FF);
+        switch (psc_id) {
+        case 1: reg = &mpc52xx_cdm->mclken_div_psc1; mask = 0x20; break;
+        case 2: reg = &mpc52xx_cdm->mclken_div_psc2; mask = 0x40; break;
+        case 3: reg = &mpc52xx_cdm->mclken_div_psc3; mask = 0x80; break;
+        case 6: reg = &mpc52xx_cdm->mclken_div_psc6; mask = 0x10; break;
+        default:
+                return -ENODEV;
         }
+
+        /* Set the rate and enable the clock */
+        spin_lock_irqsave(&mpc52xx_lock, flags);
+        out_be16(reg, mclken_div);
+        val = in_be32(&mpc52xx_cdm->clk_enables);
+        out_be32(&mpc52xx_cdm->clk_enables, val | mask);
+        spin_unlock_irqrestore(&mpc52xx_lock, flags);
+
+        return 0;
 }
 
+/**
+ * mpc52xx_restart: ppc_md->restart hook for mpc5200 using the watchdog timer
+ */
 void
 mpc52xx_restart(char *cmd)
 {
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pci.c b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
index 4b79398b2e40..e3428ddd9040 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pci.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
@@ -99,6 +99,12 @@ struct mpc52xx_pci {
         u8      reserved6[4];   /* PCI + 0xFC */
 };
 
+/* MPC5200 device tree match tables */
+const struct of_device_id mpc52xx_pci_ids[] __initdata = {
+        { .type = "pci", .compatible = "fsl,mpc5200-pci", },
+        { .type = "pci", .compatible = "mpc5200-pci", },
+        {}
+};
 
 /* ======================================================================== */
 /* PCI configuration acess                                                  */
@@ -411,9 +417,7 @@ void __init mpc52xx_setup_pci(void)
 {
         struct device_node *pci;
 
-        pci = of_find_compatible_node(NULL, NULL, "fsl,mpc5200-pci");
-        if (!pci)
-                pci = of_find_compatible_node(NULL, NULL, "mpc5200-pci");
+        pci = of_find_matching_node(NULL, mpc52xx_pci_ids);
         if (!pci)
                 return;
 
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pic.c b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
index 07e89876d582..d0dead8b9a95 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pic.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
@@ -29,6 +29,18 @@
  *
 */
 
+/* MPC5200 device tree match tables */
+static struct of_device_id mpc52xx_pic_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-pic", },
+        { .compatible = "mpc5200-pic", },
+        {}
+};
+static struct of_device_id mpc52xx_sdma_ids[] __initdata = {
+        { .compatible = "fsl,mpc5200-bestcomm", },
+        { .compatible = "mpc5200-bestcomm", },
+        {}
+};
+
 static struct mpc52xx_intr __iomem *intr;
 static struct mpc52xx_sdma __iomem *sdma;
 static struct irq_host *mpc52xx_irqhost = NULL;
@@ -367,13 +379,13 @@ void __init mpc52xx_init_irq(void)
         struct device_node *np;
 
         /* Remap the necessary zones */
-        picnode = of_find_compatible_node(NULL, NULL, "mpc5200-pic");
+        picnode = of_find_matching_node(NULL, mpc52xx_pic_ids);
         intr = of_iomap(picnode, 0);
         if (!intr)
                 panic(__FILE__  ": find_and_map failed on 'mpc5200-pic'. "
                                 "Check node !");
 
-        np = of_find_compatible_node(NULL, NULL, "mpc5200-bestcomm");
+        np = of_find_matching_node(NULL, mpc52xx_sdma_ids);
         sdma = of_iomap(np, 0);
         of_node_put(np);
         if (!sdma)
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pm.c b/arch/powerpc/platforms/52xx/mpc52xx_pm.c
index 52f027789c8f..c72d3304387f 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pm.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pm.c
@@ -60,9 +60,16 @@ int mpc52xx_set_wakeup_gpio(u8 pin, u8 level)
 int mpc52xx_pm_prepare(void)
 {
         struct device_node *np;
+        const struct of_device_id immr_ids[] = {
+                { .compatible = "fsl,mpc5200-immr", },
+                { .compatible = "fsl,mpc5200b-immr", },
+                { .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
+                { .type = "builtin", .compatible = "mpc5200", }, /* efika */
+                {}
+        };
 
         /* map the whole register space */
-        np = of_find_compatible_node(NULL, NULL, "mpc5200");
+        np = of_find_matching_node(NULL, immr_ids);
         mbar = of_iomap(np, 0);
         of_node_put(np);
         if (!mbar) {