diff options
| author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2022-10-18 17:14:06 +0200 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2022-11-14 15:35:07 +0100 |
| commit | ada8f95ba04e8fe07289b7de157ae99bb96bc8cb (patch) | |
| tree | a2d2b8f242a76394777dad80de068ab38d4a5837 | |
| parent | ff94c8660dac444081f2f650fae36a283c55b117 (diff) | |
clk: rockchip: add lookup table support
Add support for mapping reset IDs to register offsets
to support gapless continous platform reset IDs.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20221018151407.63395-9-sebastian.reichel@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| -rw-r--r-- | drivers/clk/rockchip/clk.h | 21 | ||||
| -rw-r--r-- | drivers/clk/rockchip/softrst.c | 34 |
2 files changed, 40 insertions, 15 deletions
diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h index 6e84ab85b372..7ee231d9585d 100644 --- a/drivers/clk/rockchip/clk.h +++ b/drivers/clk/rockchip/clk.h @@ -958,15 +958,24 @@ struct clk *rockchip_clk_register_halfdiv(const char *name, spinlock_t *lock); #ifdef CONFIG_RESET_CONTROLLER -void rockchip_register_softrst(struct device_node *np, - unsigned int num_regs, - void __iomem *base, u8 flags); +void rockchip_register_softrst_lut(struct device_node *np, + const int *lookup_table, + unsigned int num_regs, + void __iomem *base, u8 flags); #else -static inline void rockchip_register_softrst(struct device_node *np, - unsigned int num_regs, - void __iomem *base, u8 flags) +static inline void rockchip_register_softrst_lut(struct device_node *np, + const int *lookup_table, + unsigned int num_regs, + void __iomem *base, u8 flags) { } #endif +static inline void rockchip_register_softrst(struct device_node *np, + unsigned int num_regs, + void __iomem *base, u8 flags) +{ + return rockchip_register_softrst_lut(np, NULL, num_regs, base, flags); +} + #endif diff --git a/drivers/clk/rockchip/softrst.c b/drivers/clk/rockchip/softrst.c index 5d07266745b8..fd56aaefe6d1 100644 --- a/drivers/clk/rockchip/softrst.c +++ b/drivers/clk/rockchip/softrst.c @@ -12,6 +12,7 @@ struct rockchip_softrst { struct reset_controller_dev rcdev; + const int *lut; void __iomem *reg_base; int num_regs; int num_per_reg; @@ -25,8 +26,13 @@ static int rockchip_softrst_assert(struct reset_controller_dev *rcdev, struct rockchip_softrst *softrst = container_of(rcdev, struct rockchip_softrst, rcdev); - int bank = id / softrst->num_per_reg; - int offset = id % softrst->num_per_reg; + int bank, offset; + + if (softrst->lut) + id = softrst->lut[id]; + + bank = id / softrst->num_per_reg; + offset = id % softrst->num_per_reg; if (softrst->flags & ROCKCHIP_SOFTRST_HIWORD_MASK) { writel(BIT(offset) | (BIT(offset) << 16), @@ -52,8 +58,13 @@ static int rockchip_softrst_deassert(struct reset_controller_dev *rcdev, struct rockchip_softrst *softrst = container_of(rcdev, struct rockchip_softrst, rcdev); - int bank = id / softrst->num_per_reg; - int offset = id % softrst->num_per_reg; + int bank, offset; + + if (softrst->lut) + id = softrst->lut[id]; + + bank = id / softrst->num_per_reg; + offset = id % softrst->num_per_reg; if (softrst->flags & ROCKCHIP_SOFTRST_HIWORD_MASK) { writel((BIT(offset) << 16), softrst->reg_base + (bank * 4)); @@ -77,9 +88,10 @@ static const struct reset_control_ops rockchip_softrst_ops = { .deassert = rockchip_softrst_deassert, }; -void rockchip_register_softrst(struct device_node *np, - unsigned int num_regs, - void __iomem *base, u8 flags) +void rockchip_register_softrst_lut(struct device_node *np, + const int *lookup_table, + unsigned int num_regs, + void __iomem *base, u8 flags) { struct rockchip_softrst *softrst; int ret; @@ -91,13 +103,17 @@ void rockchip_register_softrst(struct device_node *np, spin_lock_init(&softrst->lock); softrst->reg_base = base; + softrst->lut = lookup_table; softrst->flags = flags; softrst->num_regs = num_regs; softrst->num_per_reg = (flags & ROCKCHIP_SOFTRST_HIWORD_MASK) ? 16 : 32; softrst->rcdev.owner = THIS_MODULE; - softrst->rcdev.nr_resets = num_regs * softrst->num_per_reg; + if (lookup_table) + softrst->rcdev.nr_resets = num_regs; + else + softrst->rcdev.nr_resets = num_regs * softrst->num_per_reg; softrst->rcdev.ops = &rockchip_softrst_ops; softrst->rcdev.of_node = np; ret = reset_controller_register(&softrst->rcdev); @@ -107,4 +123,4 @@ void rockchip_register_softrst(struct device_node *np, kfree(softrst); } }; -EXPORT_SYMBOL_GPL(rockchip_register_softrst); +EXPORT_SYMBOL_GPL(rockchip_register_softrst_lut); |