diff options
Diffstat (limited to 'arch/arm/mach-omap2/cm_common.c')
| -rw-r--r-- | arch/arm/mach-omap2/cm_common.c | 156 |
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; +} |