diff options
| -rw-r--r-- | drivers/clk/clk-uclass.c | 27 | ||||
| -rw-r--r-- | drivers/clk/rockchip/clk_rk3308.c | 2 | ||||
| -rw-r--r-- | drivers/core/device.c | 2 | ||||
| -rw-r--r-- | drivers/net/gmac_rockchip.c | 2 | ||||
| -rw-r--r-- | include/clk.h | 30 |
5 files changed, 46 insertions, 17 deletions
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 3d2344f009..cac0f6a012 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -207,7 +207,8 @@ static struct clk *clk_set_default_get_by_id(struct clk *clk) return c; } -static int clk_set_default_parents(struct udevice *dev, int stage) +static int clk_set_default_parents(struct udevice *dev, + enum clk_defaults_stage stage) { struct clk clk, parent_clk, *c, *p; int index; @@ -260,10 +261,10 @@ static int clk_set_default_parents(struct udevice *dev, int stage) * It cannot be done right now but need to wait after the * device is probed */ - if (stage == 0 && clk.dev == dev) + if (stage == CLK_DEFAULTS_PRE && clk.dev == dev) continue; - if (stage > 0 && clk.dev != dev) + if (stage != CLK_DEFAULTS_PRE && clk.dev != dev) /* do not setup twice the parent clocks */ continue; @@ -289,7 +290,8 @@ static int clk_set_default_parents(struct udevice *dev, int stage) return 0; } -static int clk_set_default_rates(struct udevice *dev, int stage) +static int clk_set_default_rates(struct udevice *dev, + enum clk_defaults_stage stage) { struct clk clk, *c; int index; @@ -338,10 +340,10 @@ static int clk_set_default_rates(struct udevice *dev, int stage) * It cannot be done right now but need to wait after the * device is probed */ - if (stage == 0 && clk.dev == dev) + if (stage == CLK_DEFAULTS_PRE && clk.dev == dev) continue; - if (stage > 0 && clk.dev != dev) + if (stage != CLK_DEFAULTS_PRE && clk.dev != dev) /* do not setup twice the parent clocks */ continue; @@ -364,16 +366,21 @@ fail: return ret; } -int clk_set_defaults(struct udevice *dev, int stage) +int clk_set_defaults(struct udevice *dev, enum clk_defaults_stage stage) { int ret; if (!dev_has_ofnode(dev)) return 0; - /* If this not in SPL and pre-reloc state, don't take any action. */ + /* + * To avoid setting defaults twice, don't set them before relocation. + * However, still set them for SPL. And still set them if explicitly + * asked. + */ if (!(IS_ENABLED(CONFIG_SPL_BUILD) || (gd->flags & GD_FLG_RELOC))) - return 0; + if (stage != CLK_DEFAULTS_POST_FORCE) + return 0; debug("%s(%s)\n", __func__, dev_read_name(dev)); @@ -844,7 +851,7 @@ int clk_uclass_post_probe(struct udevice *dev) * where the DT is used to setup default parents and rates * using assigned-clocks */ - clk_set_defaults(dev, 1); + clk_set_defaults(dev, CLK_DEFAULTS_POST); return 0; } diff --git a/drivers/clk/rockchip/clk_rk3308.c b/drivers/clk/rockchip/clk_rk3308.c index 5a838b9e9a..5248e59685 100644 --- a/drivers/clk/rockchip/clk_rk3308.c +++ b/drivers/clk/rockchip/clk_rk3308.c @@ -1014,7 +1014,7 @@ static int rk3308_clk_probe(struct udevice *dev) rk3308_clk_init(dev); /* Process 'assigned-{clocks/clock-parents/clock-rates}' properties */ - ret = clk_set_defaults(dev, 1); + ret = clk_set_defaults(dev, CLK_DEFAULTS_POST); if (ret) debug("%s clk_set_defaults failed %d\n", __func__, ret); diff --git a/drivers/core/device.c b/drivers/core/device.c index cb960f8ec4..9f1400768d 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -561,7 +561,7 @@ int device_probe(struct udevice *dev) * Process 'assigned-{clocks/clock-parents/clock-rates}' * properties */ - ret = clk_set_defaults(dev, 0); + ret = clk_set_defaults(dev, CLK_DEFAULTS_PRE); if (ret) goto fail; } diff --git a/drivers/net/gmac_rockchip.c b/drivers/net/gmac_rockchip.c index f909660484..04008d2b19 100644 --- a/drivers/net/gmac_rockchip.c +++ b/drivers/net/gmac_rockchip.c @@ -565,7 +565,7 @@ static int gmac_rockchip_probe(struct udevice *dev) ulong rate; int ret; - ret = clk_set_defaults(dev, 0); + ret = clk_set_defaults(dev, CLK_DEFAULTS_PRE); if (ret) debug("%s clk_set_defaults failed %d\n", __func__, ret); diff --git a/include/clk.h b/include/clk.h index ca6b85fa6f..f3c88fe68a 100644 --- a/include/clk.h +++ b/include/clk.h @@ -277,19 +277,41 @@ static inline int clk_release_all(struct clk *clk, int count) } #endif +/** + * enum clk_defaults_stage - What stage clk_set_defaults() is called at + * @CLK_DEFAULTS_PRE: Called before probe. Setting of defaults for clocks owned + * by this clock driver will be defered until after probing. + * @CLK_DEFAULTS_POST: Called after probe. Only defaults for clocks owned by + * this clock driver will be set. + * @CLK_DEFAULTS_POST_FORCE: Called after probe, and always set defaults, even + * before relocation. Usually, defaults are not set + * pre-relocation to avoid setting them twice (when + * the device is probed again post-relocation). This + * may incur a performance cost as device tree + * properties must be parsed for a second time. + * However, when not using SPL, pre-relocation may be + * the only time we can set defaults for some clocks + * (such as those used for the RAM we will relocate + * into). + */ +enum clk_defaults_stage { + CLK_DEFAULTS_PRE = 0, + CLK_DEFAULTS_POST = 1, + CLK_DEFAULTS_POST_FORCE, +}; + #if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) && \ CONFIG_IS_ENABLED(CLK) + /** * clk_set_defaults - Process 'assigned-{clocks/clock-parents/clock-rates}' * properties to configure clocks * * @dev: A device to process (the ofnode associated with this device * will be processed). - * @stage: A integer. 0 indicates that this is called before the device - * is probed. 1 indicates that this is called just after the - * device has been probed + * @stage: The stage of the probing process this function is called during. */ -int clk_set_defaults(struct udevice *dev, int stage); +int clk_set_defaults(struct udevice *dev, enum clk_defaults_stage stage); #else static inline int clk_set_defaults(struct udevice *dev, int stage) { |