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clk: renesas: Add support for RPCD2 clock

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This supports RPCD2 clock handling. While at it, add the check point
for RPC-IF clock RPCD2 Frequency Division Ratio, since it must be odd
number

Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
This commit is contained in:
Hai Pham 2020-08-11 10:25:28 +07:00 • committed by Marek Vasut
parent 1b004e2874
commit 12dd238a64
2 changed files with 17 additions and 5 deletions
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19
drivers/clk/renesas/clk-rcar-gen3.c
View file

@ -289,6 +289,7 @@ static u64 gen3_clk_get_rate64(struct clk *clk)
return -EINVAL;
case CLK_TYPE_GEN3_RPC:
case CLK_TYPE_GEN3_RPCD2:
rate = gen3_clk_get_rate64(&parent);
value = readl(priv->base + core->offset);
@ -304,13 +305,21 @@ static u64 gen3_clk_get_rate64(struct clk *clk)
postdiv = (value >> CPG_RPC_POSTDIV_OFFSET) &
CPG_RPC_POSTDIV_MASK;
rate /= postdiv + 1;
debug("%s[%i] RPC clk: parent=%i prediv=%i postdiv=%i => rate=%llu\n",
__func__, __LINE__,
core->parent, prediv, postdiv, rate);
if (postdiv % 2 != 0) {
rate /= postdiv + 1;
return rate;
if (core->type == CLK_TYPE_GEN3_RPCD2)
rate /= 2;
debug("%s[%i] RPC clk: parent=%i prediv=%i postdiv=%i => rate=%llu\n",
__func__, __LINE__,
core->parent, prediv, postdiv, rate);
return rate;
}
return -EINVAL;
}

3
drivers/clk/renesas/rcar-gen3-cpg.h
View file

@ -35,6 +35,9 @@ enum rcar_gen3_clk_types {
#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)
#define DEF_GEN3_RPCD2(_name, _id, _parent, _offset) \
DEF_BASE(_name, _id, CLK_TYPE_GEN3_RPCD2, _parent, .offset = _offset)
#define DEF_GEN3_MDSEL(_name, _id, _md, _parent0, _div0, _parent1, _div1) \
DEF_BASE(_name, _id, CLK_TYPE_GEN3_MDSEL, \
(_parent0) << 16 | (_parent1), \