ARM: OMAP2+: PRM: determine PRM base address from device tree

There is no need to provide the PRM base address through a low-level API
from the low-level IO init, as this information is available through DT.
Re-routed the parsing function to be called from the PRM drivers also to
simplify the implementation under io.c.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index b43e09d..712dd42 100644 (file)
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -386,7 +386,6 @@ void __init omap2420_init_early(void)
                               OMAP2_L3_IO_ADDRESS(OMAP2420_SMS_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP242X_CTRL_BASE),
                                  NULL);
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP2420_PRM_BASE));
        omap2xxx_check_revision();
        omap2xxx_prm_init();
        omap2xxx_cm_init();
@@ -415,7 +414,6 @@ void __init omap2430_init_early(void)
                               OMAP2_L3_IO_ADDRESS(OMAP243X_SMS_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP243X_CTRL_BASE),
                                  NULL);
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP2430_PRM_BASE));
        omap2xxx_check_revision();
        omap2xxx_prm_init();
        omap2xxx_cm_init();
@@ -448,9 +446,8 @@ void __init omap3_init_early(void)
                               OMAP2_L3_IO_ADDRESS(OMAP343X_SMS_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE),
                                  NULL);
+       /* XXX: remove these two once OMAP3 is DT only */
        omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP3430_PRM_BASE));
-
-       /* XXX: remove this once OMAP3 is DT only */
        omap2_set_globals_cm(OMAP2_L4_IO_ADDRESS(OMAP3430_CM_BASE), NULL);
        omap3xxx_check_revision();
        omap3xxx_check_features();
@@ -551,7 +548,6 @@ void __init ti814x_init_early(void)
                              OMAP2_L4_IO_ADDRESS(TI81XX_TAP_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(TI81XX_CTRL_BASE),
                                  NULL);
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(TI81XX_PRCM_BASE));
        omap3xxx_check_revision();
        ti81xx_check_features();
        am33xx_prm_init();
@@ -571,7 +567,6 @@ void __init ti816x_init_early(void)
                              OMAP2_L4_IO_ADDRESS(TI81XX_TAP_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(TI81XX_CTRL_BASE),
                                  NULL);
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(TI81XX_PRCM_BASE));
        omap3xxx_check_revision();
        ti81xx_check_features();
        am33xx_prm_init();
@@ -593,7 +588,6 @@ void __init am33xx_init_early(void)
                              AM33XX_L4_WK_IO_ADDRESS(AM33XX_TAP_BASE));
        omap2_set_globals_control(AM33XX_L4_WK_IO_ADDRESS(AM33XX_CTRL_BASE),
                                  NULL);
-       omap2_set_globals_prm(AM33XX_L4_WK_IO_ADDRESS(AM33XX_PRCM_BASE));
        omap3xxx_check_revision();
        am33xx_check_features();
        am33xx_prm_init();
@@ -618,7 +612,6 @@ void __init am43xx_init_early(void)
                              AM33XX_L4_WK_IO_ADDRESS(AM33XX_TAP_BASE));
        omap2_set_globals_control(AM33XX_L4_WK_IO_ADDRESS(AM33XX_CTRL_BASE),
                                  NULL);
-       omap2_set_globals_prm(AM33XX_L4_WK_IO_ADDRESS(AM43XX_PRCM_BASE));
        omap3xxx_check_revision();
        am33xx_check_features();
        omap44xx_prm_init();
@@ -644,7 +637,6 @@ void __init omap4430_init_early(void)
                              OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE),
                                  OMAP2_L4_IO_ADDRESS(OMAP443X_CTRL_BASE));
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP4430_PRM_BASE));
        omap2_set_globals_prcm_mpu(OMAP2_L4_IO_ADDRESS(OMAP4430_PRCM_MPU_BASE));
        omap4xxx_check_revision();
        omap4xxx_check_features();
@@ -675,7 +667,6 @@ void __init omap5_init_early(void)
                              OMAP2_L4_IO_ADDRESS(OMAP54XX_SCM_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP54XX_SCM_BASE),
                                  OMAP2_L4_IO_ADDRESS(OMAP54XX_CTRL_BASE));
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP54XX_PRM_BASE));
        omap2_set_globals_prcm_mpu(OMAP2_L4_IO_ADDRESS(OMAP54XX_PRCM_MPU_BASE));
        omap4_pm_init_early();
        omap44xx_prm_init();
@@ -703,7 +694,6 @@ void __init dra7xx_init_early(void)
        omap2_set_globals_tap(-1, OMAP2_L4_IO_ADDRESS(DRA7XX_TAP_BASE));
        omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP54XX_SCM_BASE),
                                  OMAP2_L4_IO_ADDRESS(DRA7XX_CTRL_BASE));
-       omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP54XX_PRM_BASE));
        omap2_set_globals_prcm_mpu(OMAP2_L4_IO_ADDRESS(OMAP54XX_PRCM_MPU_BASE));
        omap4_pm_init_early();
        omap44xx_prm_init();

diff --git a/arch/arm/mach-omap2/prm.h b/arch/arm/mach-omap2/prm.h
index 4e390ec..6d0a808 100644 (file)
--- a/arch/arm/mach-omap2/prm.h
+++ b/arch/arm/mach-omap2/prm.h
@@ -20,6 +20,7 @@ extern void __iomem *prm_base;
 extern u16 prm_features;
 extern void omap2_set_globals_prm(void __iomem *prm);
 int omap_prcm_init(void);
+int omap2_prm_base_init(void);
 void omap3_prcm_legacy_iomaps_init(void);
 # endif
 

diff --git a/arch/arm/mach-omap2/prm2xxx.c b/arch/arm/mach-omap2/prm2xxx.c
index bacb05e..29e203f 100644 (file)
--- a/arch/arm/mach-omap2/prm2xxx.c
+++ b/arch/arm/mach-omap2/prm2xxx.c
@@ -222,6 +222,7 @@ static struct prm_ll_data omap2xxx_prm_ll_data = {
 
 int __init omap2xxx_prm_init(void)
 {
+       omap2_prm_base_init();
        return prm_register(&omap2xxx_prm_ll_data);
 }
 

diff --git a/arch/arm/mach-omap2/prm33xx.c b/arch/arm/mach-omap2/prm33xx.c
index 02f6286..1e052aa 100644 (file)
--- a/arch/arm/mach-omap2/prm33xx.c
+++ b/arch/arm/mach-omap2/prm33xx.c
@@ -380,6 +380,7 @@ static struct prm_ll_data am33xx_prm_ll_data = {
 
 int __init am33xx_prm_init(void)
 {
+       omap2_prm_base_init();
        return prm_register(&am33xx_prm_ll_data);
 }
 

diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
index 2b478ad..a347993 100644 (file)
--- a/arch/arm/mach-omap2/prm3xxx.c
+++ b/arch/arm/mach-omap2/prm3xxx.c
@@ -29,6 +29,7 @@
 #include "prm-regbits-34xx.h"
 #include "cm3xxx.h"
 #include "cm-regbits-34xx.h"
+#include "clock.h"
 
 static void omap3xxx_prm_read_pending_irqs(unsigned long *events);
 static void omap3xxx_prm_ocp_barrier(void);
@@ -671,6 +672,10 @@ static struct prm_ll_data omap3xxx_prm_ll_data = {
 
 int __init omap3xxx_prm_init(void)
 {
+       omap2_clk_legacy_provider_init(TI_CLKM_PRM,
+                                      prm_base + OMAP3430_IVA2_MOD);
+       omap2_prm_base_init();
+
        if (omap3_has_io_wakeup())
                prm_features |= PRM_HAS_IO_WAKEUP;
 

diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 6f647f6..b479a33 100644 (file)
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -705,6 +705,7 @@ static struct prm_ll_data omap44xx_prm_ll_data = {
 
 int __init omap44xx_prm_init(void)
 {
+       omap2_prm_base_init();
        omap_prm_base_init();
 
        if (cpu_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx())

diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 9f9c816..b23d232 100644 (file)
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -637,6 +637,16 @@ static struct omap_prcm_init_data prm_data = {
        .index = TI_CLKM_PRM,
 };
 
+static struct omap_prcm_init_data omap3_prm_data = {
+       .index = TI_CLKM_PRM,
+
+       /*
+        * IVA2 offset is a negative value, must offset the prm_base
+        * address by this to get it to positive
+        */
+       .offset = -OMAP3430_IVA2_MOD,
+};
+
 static struct omap_prcm_init_data scrm_data = {
        .index = TI_CLKM_SCRM,
 };
@@ -647,7 +657,7 @@ static const struct of_device_id omap_prcm_dt_match_table[] = {
        { .compatible = "ti,dm814-prcm", .data = &prm_data },
        { .compatible = "ti,dm816-prcm", .data = &prm_data },
        { .compatible = "ti,omap2-prcm", .data = &prm_data },
-       { .compatible = "ti,omap3-prm", .data = &prm_data },
+       { .compatible = "ti,omap3-prm", .data = &omap3_prm_data },
        { .compatible = "ti,omap4-prm", .data = &prm_data },
        { .compatible = "ti,omap4-scrm", .data = &scrm_data },
        { .compatible = "ti,omap5-prm", .data = &prm_data },
@@ -656,6 +666,36 @@ static const struct of_device_id omap_prcm_dt_match_table[] = {
        { }
 };
 
+/**
+ * omap2_prm_base_init - initialize iomappings for the PRM driver
+ *
+ * Detects and initializes the iomappings for the PRM driver, based
+ * on the DT data. Returns 0 in success, negative error value
+ * otherwise.
+ */
+int __init omap2_prm_base_init(void)
+{
+       struct device_node *np;
+       const struct of_device_id *match;
+       struct omap_prcm_init_data *data;
+       void __iomem *mem;
+
+       for_each_matching_node_and_match(np, omap_prcm_dt_match_table, &match) {
+               data = (struct omap_prcm_init_data *)match->data;
+
+               mem = of_iomap(np, 0);
+               if (!mem)
+                       return -ENOMEM;
+
+               if (data->index == TI_CLKM_PRM)
+                       prm_base = mem + data->offset;
+
+               data->mem = mem;
+       }
+
+       return 0;
+}
+
 /**
  * omap_prcm_init - low level init for the PRCM drivers
  *
@@ -665,7 +705,6 @@ static const struct of_device_id omap_prcm_dt_match_table[] = {
 int __init omap_prcm_init(void)
 {
        struct device_node *np;
-       void __iomem *mem;
        const struct of_device_id *match;
        const struct omap_prcm_init_data *data;
        int ret;
@@ -673,11 +712,7 @@ int __init omap_prcm_init(void)
        for_each_matching_node_and_match(np, omap_prcm_dt_match_table, &match) {
                data = match->data;
 
-               mem = of_iomap(np, 0);
-               if (!mem)
-                       return -ENOMEM;
-
-               ret = omap2_clk_provider_init(np, data->index, mem);
+               ret = omap2_clk_provider_init(np, data->index, data->mem);
                if (ret)
                        return ret;
        }
@@ -689,8 +724,6 @@ int __init omap_prcm_init(void)
 
 void __init omap3_prcm_legacy_iomaps_init(void)
 {
-       omap2_clk_legacy_provider_init(TI_CLKM_PRM,
-                                      prm_base + OMAP3430_IVA2_MOD);
        omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap_ctrl_base_get());
 }