From 7c09b858961df25a3bd1ac22e802525795338a6d Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Thu, 19 Jan 2017 22:49:26 +0100 Subject: [PATCH] clk: sunxi-ng: Implement global pre-divider Some clocks have a global pre-divider that applies to all their parents. Since it might also apply to clocks that have a single parent, this is merged in the ccu_common structure, unlike the other pre-divider settings that are tied to a specific index, and thus a specific parent. Acked-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard --- drivers/clk/sunxi-ng/ccu_common.h | 2 ++ drivers/clk/sunxi-ng/ccu_mux.c | 8 +++++++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/clk/sunxi-ng/ccu_common.h b/drivers/clk/sunxi-ng/ccu_common.h index b3d9abfbd721..cdd69eb2e0b9 100644 --- a/drivers/clk/sunxi-ng/ccu_common.h +++ b/drivers/clk/sunxi-ng/ccu_common.h @@ -21,6 +21,7 @@ #define CCU_FEATURE_VARIABLE_PREDIV BIT(1) #define CCU_FEATURE_FIXED_PREDIV BIT(2) #define CCU_FEATURE_FIXED_POSTDIV BIT(3) +#define CCU_FEATURE_ALL_PREDIV BIT(4) struct device_node; @@ -56,6 +57,7 @@ struct device_node; struct ccu_common { void __iomem *base; u16 reg; + u32 prediv; unsigned long features; spinlock_t *lock; diff --git a/drivers/clk/sunxi-ng/ccu_mux.c b/drivers/clk/sunxi-ng/ccu_mux.c index a43ad52a957d..858a48621631 100644 --- a/drivers/clk/sunxi-ng/ccu_mux.c +++ b/drivers/clk/sunxi-ng/ccu_mux.c @@ -25,9 +25,15 @@ void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common, int i; if (!((common->features & CCU_FEATURE_FIXED_PREDIV) || - (common->features & CCU_FEATURE_VARIABLE_PREDIV))) + (common->features & CCU_FEATURE_VARIABLE_PREDIV) || + (common->features & CCU_FEATURE_ALL_PREDIV))) return; + if (common->features & CCU_FEATURE_ALL_PREDIV) { + *parent_rate = *parent_rate / common->prediv; + return; + } + reg = readl(common->base + common->reg); if (parent_index < 0) { parent_index = reg >> cm->shift; -- 2.20.1