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Message-Id: <20230617150302.38477-1-aford173@gmail.com>
Date: Sat, 17 Jun 2023 10:02:59 -0500
From: Adam Ford <aford173@...il.com>
To: linux-clk@...r.kernel.org
Cc: aford@...conembedded.com, Adam Ford <aford173@...il.com>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] clk: renesas: rcar-gen3: Add support for ZG clock
A clock used for the 3D graphics appears to be common
among multiple SoC's, so add a generic gen3 clock
for clocking the graphics. This is similar to the
cpg_z_clk, with a different frequency control register
and different flags. Instead of duplicating the code,
make cpg_z_clk_register into a helper function and
call the help function with the FCR and flags as
a parameter.
Signed-off-by: Adam Ford <aford173@...il.com>
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index b3ef62fa612e..d0129a650941 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -264,11 +264,13 @@ static const struct clk_ops cpg_z_clk_ops = {
.set_rate = cpg_z_clk_set_rate,
};
-static struct clk * __init cpg_z_clk_register(const char *name,
+static struct clk * __init __cpg_z_clk_register(const char *name,
const char *parent_name,
void __iomem *reg,
unsigned int div,
- unsigned int offset)
+ unsigned int offset,
+ unsigned int fcr,
+ unsigned int flags)
{
struct clk_init_data init = {};
struct cpg_z_clk *zclk;
@@ -280,11 +282,11 @@ static struct clk * __init cpg_z_clk_register(const char *name,
init.name = name;
init.ops = &cpg_z_clk_ops;
- init.flags = CLK_SET_RATE_PARENT;
+ init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
- zclk->reg = reg + CPG_FRQCRC;
+ zclk->reg = reg + fcr;
zclk->kick_reg = reg + CPG_FRQCRB;
zclk->hw.init = &init;
zclk->mask = GENMASK(offset + 4, offset);
@@ -301,6 +303,27 @@ static struct clk * __init cpg_z_clk_register(const char *name,
return clk;
}
+static struct clk * __init cpg_z_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *reg,
+ unsigned int div,
+ unsigned int offset)
+{
+ return __cpg_z_clk_register(name, parent_name, reg, div, offset,
+ CPG_FRQCRC, CLK_SET_RATE_PARENT);
+}
+
+static struct clk * __init cpg_zg_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *reg,
+ unsigned int div,
+ unsigned int offset)
+{
+ return __cpg_z_clk_register(name, parent_name, reg, div, offset,
+ CPG_FRQCRB, 0);
+
+}
+
static const struct clk_div_table cpg_rpcsrc_div_table[] = {
{ 2, 5 }, { 3, 6 }, { 0, 0 },
};
@@ -438,6 +461,10 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
return cpg_z_clk_register(core->name, __clk_get_name(parent),
base, core->div, core->offset);
+ case CLK_TYPE_GEN3_ZG:
+ return cpg_zg_clk_register(core->name, __clk_get_name(parent),
+ base, core->div, core->offset);
+
case CLK_TYPE_GEN3_OSC:
/*
* Clock combining OSC EXTAL predivider and a fixed divider
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
index 9028bf4295ce..bfdc649bdf12 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_MDSEL, /* Select parent/divider using mode pin */
CLK_TYPE_GEN3_Z,
+ CLK_TYPE_GEN3_ZG,
CLK_TYPE_GEN3_OSC, /* OSC EXTAL predivider and fixed divider */
CLK_TYPE_GEN3_RCKSEL, /* Select parent/divider using RCKCR.CKSEL */
CLK_TYPE_GEN3_RPCSRC,
--
2.39.2
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