diff options
Diffstat (limited to 'drivers/clk/ti/clkctrl.c')
| -rw-r--r-- | drivers/clk/ti/clkctrl.c | 91 |
1 files changed, 84 insertions, 7 deletions
diff --git a/drivers/clk/ti/clkctrl.c b/drivers/clk/ti/clkctrl.c index 53e71d0503ec..afa0d6bfc5c1 100644 --- a/drivers/clk/ti/clkctrl.c +++ b/drivers/clk/ti/clkctrl.c @@ -21,6 +21,7 @@ #include <linux/of_address.h> #include <linux/clk/ti.h> #include <linux/delay.h> +#include <linux/timekeeping.h> #include "clock.h" #define NO_IDLEST 0x1 @@ -46,6 +47,7 @@ static bool _early_timeout = true; struct omap_clkctrl_provider { void __iomem *base; struct list_head clocks; + char *clkdm_name; }; struct omap_clkctrl_clk { @@ -89,7 +91,18 @@ static bool _omap4_is_ready(u32 val) static bool _omap4_is_timeout(union omap4_timeout *time, u32 timeout) { - if (unlikely(_early_timeout)) { + /* + * There are two special cases where ktime_to_ns() can't be + * used to track the timeouts. First one is during early boot + * when the timers haven't been initialized yet. The second + * one is during suspend-resume cycle while timekeeping is + * being suspended / resumed. Clocksource for the system + * can be from a timer that requires pm_runtime access, which + * will eventually bring us here with timekeeping_suspended, + * during both suspend entry and resume paths. This happens + * at least on am43xx platform. + */ + if (unlikely(_early_timeout || timekeeping_suspended)) { if (time->cycles++ < timeout) { udelay(1); return false; @@ -208,6 +221,7 @@ static const struct clk_ops omap4_clkctrl_clk_ops = { .enable = _omap4_clkctrl_clk_enable, .disable = _omap4_clkctrl_clk_disable, .is_enabled = _omap4_clkctrl_clk_is_enabled, + .init = omap2_init_clk_clkdm, }; static struct clk_hw *_ti_omap4_clkctrl_xlate(struct of_phandle_args *clkspec, @@ -321,6 +335,9 @@ _ti_clkctrl_setup_mux(struct omap_clkctrl_provider *provider, } mux->mask = num_parents; + if (!(mux->flags & CLK_MUX_INDEX_ONE)) + mux->mask--; + mux->mask = (1 << fls(mux->mask)) - 1; mux->shift = data->bit; @@ -340,6 +357,7 @@ _ti_clkctrl_setup_div(struct omap_clkctrl_provider *provider, { struct clk_omap_divider *div; const struct omap_clkctrl_div_data *div_data = data->data; + u8 div_flags = 0; div = kzalloc(sizeof(*div), GFP_KERNEL); if (!div) @@ -347,12 +365,16 @@ _ti_clkctrl_setup_div(struct omap_clkctrl_provider *provider, div->reg.ptr = reg; div->shift = data->bit; + div->flags = div_data->flags; + + if (div->flags & CLK_DIVIDER_POWER_OF_TWO) + div_flags |= CLKF_INDEX_POWER_OF_TWO; - if (ti_clk_parse_divider_data((int *)div_data->dividers, - div_data->max_div, 0, 0, + if (ti_clk_parse_divider_data((int *)div_data->dividers, 0, + div_data->max_div, div_flags, &div->width, &div->table)) { - pr_err("%s: Data parsing for %s:%04x:%d failed\n", __func__, - node->name, offset, data->bit); + pr_err("%s: Data parsing for %pOF:%04x:%d failed\n", __func__, + node, offset, data->bit); kfree(div); return; } @@ -400,6 +422,12 @@ _ti_clkctrl_setup_subclks(struct omap_clkctrl_provider *provider, } } +static void __init _clkctrl_add_provider(void *data, + struct device_node *np) +{ + of_clk_add_hw_provider(np, _ti_omap4_clkctrl_xlate, data); +} + static void __init _ti_omap4_clkctrl_setup(struct device_node *node) { struct omap_clkctrl_provider *provider; @@ -411,6 +439,7 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) struct omap_clkctrl_clk *clkctrl_clk; const __be32 *addrp; u32 addr; + int ret; addrp = of_get_address(node, 0, NULL, NULL); addr = (u32)of_translate_address(node, addrp); @@ -419,6 +448,31 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) if (of_machine_is_compatible("ti,omap4")) data = omap4_clkctrl_data; #endif +#ifdef CONFIG_SOC_OMAP5 + if (of_machine_is_compatible("ti,omap5")) + data = omap5_clkctrl_data; +#endif +#ifdef CONFIG_SOC_DRA7XX + if (of_machine_is_compatible("ti,dra7")) + data = dra7_clkctrl_data; +#endif +#ifdef CONFIG_SOC_AM33XX + if (of_machine_is_compatible("ti,am33xx")) + data = am3_clkctrl_data; +#endif +#ifdef CONFIG_SOC_AM43XX + if (of_machine_is_compatible("ti,am4372")) + data = am4_clkctrl_data; + if (of_machine_is_compatible("ti,am438x")) + data = am438x_clkctrl_data; +#endif +#ifdef CONFIG_SOC_TI81XX + if (of_machine_is_compatible("ti,dm814")) + data = dm814_clkctrl_data; + + if (of_machine_is_compatible("ti,dm816")) + data = dm816_clkctrl_data; +#endif while (data->addr) { if (addr == data->addr) @@ -428,7 +482,7 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) } if (!data->addr) { - pr_err("%s not found from clkctrl data.\n", node->name); + pr_err("%pOF not found from clkctrl data.\n", node); return; } @@ -438,6 +492,21 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) provider->base = of_iomap(node, 0); + provider->clkdm_name = kmalloc(strlen(node->parent->name) + 3, + GFP_KERNEL); + if (!provider->clkdm_name) { + kfree(provider); + return; + } + + /* + * Create default clkdm name, replace _cm from end of parent node + * name with _clkdm + */ + strcpy(provider->clkdm_name, node->parent->name); + provider->clkdm_name[strlen(provider->clkdm_name) - 2] = 0; + strcat(provider->clkdm_name, "clkdm"); + INIT_LIST_HEAD(&provider->clocks); /* Generate clocks */ @@ -460,6 +529,11 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) if (reg_data->flags & CLKF_NO_IDLEST) hw->flags |= NO_IDLEST; + if (reg_data->clkdm_name) + hw->clkdm_name = reg_data->clkdm_name; + else + hw->clkdm_name = provider->clkdm_name; + init.parent_names = ®_data->parent; init.num_parents = 1; init.flags = 0; @@ -485,7 +559,10 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) reg_data++; } - of_clk_add_hw_provider(node, _ti_omap4_clkctrl_xlate, provider); + ret = of_clk_add_hw_provider(node, _ti_omap4_clkctrl_xlate, provider); + if (ret == -EPROBE_DEFER) + ti_clk_retry_init(node, provider, _clkctrl_add_provider); + return; cleanup: |