diff options
Diffstat (limited to 'drivers/clk/at91/pmc.c')
| -rw-r--r-- | drivers/clk/at91/pmc.c | 218 |
1 files changed, 133 insertions, 85 deletions
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c index ca90abef2d..660e231921 100644 --- a/drivers/clk/at91/pmc.c +++ b/drivers/clk/at91/pmc.c @@ -4,119 +4,167 @@ * Wenyou.Yang <wenyou.yang@atmel.com> */ -#include <common.h> +#include <asm/io.h> #include <clk-uclass.h> -#include <dm.h> -#include <log.h> -#include <dm/lists.h> -#include <dm/util.h> +#include <common.h> + #include "pmc.h" -DECLARE_GLOBAL_DATA_PTR; - -static const struct udevice_id at91_pmc_match[] = { - { .compatible = "atmel,at91rm9200-pmc" }, - { .compatible = "atmel,at91sam9260-pmc" }, - { .compatible = "atmel,at91sam9g45-pmc" }, - { .compatible = "atmel,at91sam9n12-pmc" }, - { .compatible = "atmel,at91sam9x5-pmc" }, - { .compatible = "atmel,sama5d3-pmc" }, - { .compatible = "atmel,sama5d2-pmc" }, - {} -}; +static int at91_clk_of_xlate(struct clk *clk, struct ofnode_phandle_args *args) +{ + if (args->args_count != 2) { + debug("AT91: clk: Invalid args_count: %d\n", args->args_count); + return -EINVAL; + } -U_BOOT_DRIVER(atmel_at91rm9200_pmc) = { - .name = "atmel_at91rm9200_pmc", - .id = UCLASS_SIMPLE_BUS, - .of_match = at91_pmc_match, -}; + clk->id = AT91_TO_CLK_ID(args->args[0], args->args[1]); + + return 0; +} + +static ulong at91_clk_get_rate(struct clk *clk) +{ + struct clk *c; + int ret; + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + return clk_get_rate(c); +} + +static ulong at91_clk_set_rate(struct clk *clk, ulong rate) +{ + struct clk *c; + int ret; -U_BOOT_DRIVER_ALIAS(atmel_at91rm9200_pmc, atmel_at91sam9260_pmc) + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; -/*---------------------------------------------------------*/ + return clk_set_rate(c, rate); +} -int at91_pmc_core_probe(struct udevice *dev) +static int at91_clk_enable(struct clk *clk) { - struct pmc_platdata *plat = dev_get_platdata(dev); + struct clk *c; + int ret; - dev = dev_get_parent(dev); + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; - plat->reg_base = dev_read_addr_ptr(dev); + return clk_enable(c); +} - return 0; +static int at91_clk_disable(struct clk *clk) +{ + struct clk *c; + int ret; + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + return clk_disable(c); } +const struct clk_ops at91_clk_ops = { + .of_xlate = at91_clk_of_xlate, + .set_rate = at91_clk_set_rate, + .get_rate = at91_clk_get_rate, + .enable = at91_clk_enable, + .disable = at91_clk_disable, +}; + /** - * at91_clk_sub_device_bind() - for the at91 clock driver - * Recursively bind its children as clk devices. + * pmc_read() - read content at address base + off into val * - * @return: 0 on success, or negative error code on failure + * @base: base address + * @off: offset to read from + * @val: where the content of base + off is stored + * + * @return: void */ -int at91_clk_sub_device_bind(struct udevice *dev, const char *drv_name) +void pmc_read(void __iomem *base, unsigned int off, unsigned int *val) { - const void *fdt = gd->fdt_blob; - int offset = dev_of_offset(dev); - bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC); - const char *name; - int ret; - - for (offset = fdt_first_subnode(fdt, offset); - offset > 0; - offset = fdt_next_subnode(fdt, offset)) { - if (pre_reloc_only && - !ofnode_pre_reloc(offset_to_ofnode(offset))) - continue; - /* - * If this node has "compatible" property, this is not - * a clock sub-node, but a normal device. skip. - */ - fdt_get_property(fdt, offset, "compatible", &ret); - if (ret >= 0) - continue; - - if (ret != -FDT_ERR_NOTFOUND) - return ret; - - name = fdt_get_name(fdt, offset, NULL); - if (!name) - return -EINVAL; - ret = device_bind_driver_to_node(dev, drv_name, name, - offset_to_ofnode(offset), NULL); - if (ret) - return ret; - } + *val = readl(base + off); +} - return 0; +/** + * pmc_write() - write content of val at address base + off + * + * @base: base address + * @off: offset to write to + * @val: content to be written at base + off + * + * @return: void + */ +void pmc_write(void __iomem *base, unsigned int off, unsigned int val) +{ + writel(val, base + off); } -int at91_clk_of_xlate(struct clk *clk, struct ofnode_phandle_args *args) +/** + * pmc_update_bits() - update a set of bits at address base + off + * + * @base: base address + * @off: offset to be updated + * @mask: mask of bits to be updated + * @bits: the new value to be updated + * + * @return: void + */ +void pmc_update_bits(void __iomem *base, unsigned int off, + unsigned int mask, unsigned int bits) { - int periph; + unsigned int tmp; - if (args->args_count) { - debug("Invalid args_count: %d\n", args->args_count); - return -EINVAL; - } + tmp = readl(base + off); + tmp &= ~mask; + writel(tmp | (bits & mask), base + off); +} - periph = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(clk->dev), "reg", - -1); - if (periph < 0) +/** + * at91_clk_mux_val_to_index() - get parent index in mux table + * + * @table: clock mux table + * @num_parents: clock number of parents + * @val: clock id who's mux index should be retrieved + * + * @return: clock index in mux table or a negative error number in case of + * failure + */ +int at91_clk_mux_val_to_index(const u32 *table, u32 num_parents, u32 val) +{ + int i; + + if (!table || !num_parents) return -EINVAL; - clk->id = periph; + for (i = 0; i < num_parents; i++) { + if (table[i] == val) + return i; + } - return 0; + return -EINVAL; } -int at91_clk_probe(struct udevice *dev) +/** + * at91_clk_mux_index_to_val() - get parent ID corresponding to an entry in + * clock's mux table + * + * @table: clock's mux table + * @num_parents: clock's number of parents + * @index: index in mux table which clock's ID should be retrieved + * + * @return: clock ID or a negative error number in case of failure + */ +int at91_clk_mux_index_to_val(const u32 *table, u32 num_parents, u32 index) { - struct udevice *dev_periph_container, *dev_pmc; - struct pmc_platdata *plat = dev_get_platdata(dev); - - dev_periph_container = dev_get_parent(dev); - dev_pmc = dev_get_parent(dev_periph_container); - - plat->reg_base = dev_read_addr_ptr(dev_pmc); + if (!table || !num_parents || index < 0 || index > num_parents) + return -EINVAL; - return 0; + return table[index]; } |