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Diffstat (limited to 'arch/arm/mach-omap2/cm_common.c')
-rw-r--r--arch/arm/mach-omap2/cm_common.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cm_common.c b/arch/arm/mach-omap2/cm_common.c
index 8fe02fcedc48..23e8bcec34e3 100644
--- a/arch/arm/mach-omap2/cm_common.c
+++ b/arch/arm/mach-omap2/cm_common.c
@@ -15,10 +15,14 @@
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/bug.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include "cm2xxx.h"
#include "cm3xxx.h"
+#include "cm33xx.h"
#include "cm44xx.h"
+#include "clock.h"
/*
* cm_ll_data: function pointers to SoC-specific implementations of
@@ -33,6 +37,9 @@ void __iomem *cm_base;
/* cm2_base: base virtual address of the CM2 IP block (OMAP44xx only) */
void __iomem *cm2_base;
+#define CM_NO_CLOCKS 0x1
+#define CM_SINGLE_INSTANCE 0x2
+
/**
* omap2_set_globals_cm - set the CM/CM2 base addresses (for early use)
* @cm: CM base virtual address
@@ -212,3 +219,152 @@ int cm_unregister(struct cm_ll_data *cld)
return 0;
}
+
+#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
+ defined(CONFIG_SOC_DRA7XX)
+static struct omap_prcm_init_data cm_data __initdata = {
+ .index = TI_CLKM_CM,
+ .init = omap4_cm_init,
+};
+
+static struct omap_prcm_init_data cm2_data __initdata = {
+ .index = TI_CLKM_CM2,
+ .init = omap4_cm_init,
+};
+#endif
+
+#ifdef CONFIG_ARCH_OMAP2
+static struct omap_prcm_init_data omap2_prcm_data __initdata = {
+ .index = TI_CLKM_CM,
+ .init = omap2xxx_cm_init,
+ .flags = CM_NO_CLOCKS | CM_SINGLE_INSTANCE,
+};
+#endif
+
+#ifdef CONFIG_ARCH_OMAP3
+static struct omap_prcm_init_data omap3_cm_data __initdata = {
+ .index = TI_CLKM_CM,
+ .init = omap3xxx_cm_init,
+ .flags = CM_SINGLE_INSTANCE,
+
+ /*
+ * IVA2 offset is a negative value, must offset the cm_base address
+ * by this to get it to positive side on the iomap
+ */
+ .offset = -OMAP3430_IVA2_MOD,
+};
+#endif
+
+#if defined(CONFIG_SOC_AM33XX) || defined(CONFIG_SOC_TI81XX)
+static struct omap_prcm_init_data am3_prcm_data __initdata = {
+ .index = TI_CLKM_CM,
+ .flags = CM_NO_CLOCKS | CM_SINGLE_INSTANCE,
+ .init = am33xx_cm_init,
+};
+#endif
+
+#ifdef CONFIG_SOC_AM43XX
+static struct omap_prcm_init_data am4_prcm_data __initdata = {
+ .index = TI_CLKM_CM,
+ .flags = CM_NO_CLOCKS | CM_SINGLE_INSTANCE,
+ .init = omap4_cm_init,
+};
+#endif
+
+static const struct of_device_id omap_cm_dt_match_table[] __initconst = {
+#ifdef CONFIG_ARCH_OMAP2
+ { .compatible = "ti,omap2-prcm", .data = &omap2_prcm_data },
+#endif
+#ifdef CONFIG_ARCH_OMAP3
+ { .compatible = "ti,omap3-cm", .data = &omap3_cm_data },
+#endif
+#ifdef CONFIG_ARCH_OMAP4
+ { .compatible = "ti,omap4-cm1", .data = &cm_data },
+ { .compatible = "ti,omap4-cm2", .data = &cm2_data },
+#endif
+#ifdef CONFIG_SOC_OMAP5
+ { .compatible = "ti,omap5-cm-core-aon", .data = &cm_data },
+ { .compatible = "ti,omap5-cm-core", .data = &cm2_data },
+#endif
+#ifdef CONFIG_SOC_DRA7XX
+ { .compatible = "ti,dra7-cm-core-aon", .data = &cm_data },
+ { .compatible = "ti,dra7-cm-core", .data = &cm2_data },
+#endif
+#ifdef CONFIG_SOC_AM33XX
+ { .compatible = "ti,am3-prcm", .data = &am3_prcm_data },
+#endif
+#ifdef CONFIG_SOC_AM43XX
+ { .compatible = "ti,am4-prcm", .data = &am4_prcm_data },
+#endif
+#ifdef CONFIG_SOC_TI81XX
+ { .compatible = "ti,dm814-prcm", .data = &am3_prcm_data },
+ { .compatible = "ti,dm816-prcm", .data = &am3_prcm_data },
+#endif
+ { }
+};
+
+/**
+ * omap2_cm_base_init - initialize iomappings for the CM drivers
+ *
+ * Detects and initializes the iomappings for the CM driver, based
+ * on the DT data. Returns 0 in success, negative error value
+ * otherwise.
+ */
+int __init omap2_cm_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_cm_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_CM)
+ cm_base = mem + data->offset;
+
+ if (data->index == TI_CLKM_CM2)
+ cm2_base = mem + data->offset;
+
+ data->mem = mem;
+
+ data->np = np;
+
+ if (data->init && (data->flags & CM_SINGLE_INSTANCE ||
+ (cm_base && cm2_base)))
+ data->init(data);
+ }
+
+ return 0;
+}
+
+/**
+ * omap_cm_init - low level init for the CM drivers
+ *
+ * Initializes the low level clock infrastructure for CM drivers.
+ * Returns 0 in success, negative error value in failure.
+ */
+int __init omap_cm_init(void)
+{
+ struct device_node *np;
+ const struct of_device_id *match;
+ const struct omap_prcm_init_data *data;
+ int ret;
+
+ for_each_matching_node_and_match(np, omap_cm_dt_match_table, &match) {
+ data = match->data;
+
+ if (data->flags & CM_NO_CLOCKS)
+ continue;
+
+ ret = omap2_clk_provider_init(np, data->index, NULL, data->mem);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}