diff options
| author | Takeshi Kihara <takeshi.kihara.df@renesas.com> | 2018-01-29 19:01:50 +0100 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2018-02-12 15:10:18 +0100 |
| commit | 41ceeb5fef7719474a17a5a6052cae5b6c9e37c0 (patch) | |
| tree | 88b9cac14b4b0c84b7d396354fca2240ef088d75 /drivers/clk/renesas | |
| parent | 3391891fa9c82fd14bcddec2f422299b57ce8091 (diff) | |
| download | linux-41ceeb5fef7719474a17a5a6052cae5b6c9e37c0.tar.bz2 | |
clk: renesas: rcar-gen3: Add Z2 clock divider support
This patch adds Z2 clock divider support for R-Car Gen3 SoC.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Diffstat (limited to 'drivers/clk/renesas')
| -rw-r--r-- | drivers/clk/renesas/rcar-gen3-cpg.c | 22 | ||||
| -rw-r--r-- | drivers/clk/renesas/rcar-gen3-cpg.h | 1 |
2 files changed, 17 insertions, 6 deletions
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c index b85918fa62c6..0c8fe10d57fe 100644 --- a/drivers/clk/renesas/rcar-gen3-cpg.c +++ b/drivers/clk/renesas/rcar-gen3-cpg.c @@ -63,7 +63,7 @@ static void cpg_simple_notifier_register(struct raw_notifier_head *notifiers, } /* - * Z Clock + * Z Clock & Z2 Clock * * Traits of this clock: * prepare - clk_prepare only ensures that parents are prepared @@ -75,11 +75,13 @@ static void cpg_simple_notifier_register(struct raw_notifier_head *notifiers, #define CPG_FRQCRB_KICK BIT(31) #define CPG_FRQCRC 0x000000e0 #define CPG_FRQCRC_ZFC_MASK GENMASK(12, 8) +#define CPG_FRQCRC_Z2FC_MASK GENMASK(4, 0) struct cpg_z_clk { struct clk_hw hw; void __iomem *reg; void __iomem *kick_reg; + unsigned long mask; }; #define to_z_clk(_hw) container_of(_hw, struct cpg_z_clk, hw) @@ -89,8 +91,10 @@ static unsigned long cpg_z_clk_recalc_rate(struct clk_hw *hw, { struct cpg_z_clk *zclk = to_z_clk(hw); unsigned int mult; + u32 val; - mult = 32 - FIELD_GET(CPG_FRQCRC_ZFC_MASK, clk_readl(zclk->reg)); + val = clk_readl(zclk->reg) & zclk->mask; + mult = 32 - (val >> __ffs(zclk->mask)); /* Factor of 2 is for fixed divider */ return DIV_ROUND_CLOSEST_ULL((u64)parent_rate * mult, 32 * 2); @@ -124,8 +128,8 @@ static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate, if (clk_readl(zclk->kick_reg) & CPG_FRQCRB_KICK) return -EBUSY; - val = clk_readl(zclk->reg) & ~CPG_FRQCRC_ZFC_MASK; - val |= FIELD_PREP(CPG_FRQCRC_ZFC_MASK, 32 - mult); + val = clk_readl(zclk->reg) & ~zclk->mask; + val |= ((32 - mult) << __ffs(zclk->mask)) & zclk->mask; clk_writel(val, zclk->reg); /* @@ -163,7 +167,8 @@ static const struct clk_ops cpg_z_clk_ops = { static struct clk * __init cpg_z_clk_register(const char *name, const char *parent_name, - void __iomem *reg) + void __iomem *reg, + unsigned long mask) { struct clk_init_data init; struct cpg_z_clk *zclk; @@ -182,6 +187,7 @@ static struct clk * __init cpg_z_clk_register(const char *name, zclk->reg = reg + CPG_FRQCRC; zclk->kick_reg = reg + CPG_FRQCRB; zclk->hw.init = &init; + zclk->mask = mask; clk = clk_register(NULL, &zclk->hw); if (IS_ERR(clk)) @@ -551,7 +557,11 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev, case CLK_TYPE_GEN3_Z: return cpg_z_clk_register(core->name, __clk_get_name(parent), - base); + base, CPG_FRQCRC_ZFC_MASK); + + case CLK_TYPE_GEN3_Z2: + return cpg_z_clk_register(core->name, __clk_get_name(parent), + base, CPG_FRQCRC_Z2FC_MASK); default: return ERR_PTR(-EINVAL); diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h index c73d4d6fdc85..ea4f8fc3c4c9 100644 --- a/drivers/clk/renesas/rcar-gen3-cpg.h +++ b/drivers/clk/renesas/rcar-gen3-cpg.h @@ -22,6 +22,7 @@ enum rcar_gen3_clk_types { CLK_TYPE_GEN3_R, CLK_TYPE_GEN3_PE, CLK_TYPE_GEN3_Z, + CLK_TYPE_GEN3_Z2, }; #define DEF_GEN3_SD(_name, _id, _parent, _offset) \ |