Add a clock type and macro for defining clocks using the OSC EXTAL
predivider combined with a fixed divider.
On most R-Car Gen3 SoCs, the predivider value depends on mode pins, and
thus must be specified in the configuration structure.
Inspired by a patch in the BSP by Takeshi Kihara
<takeshi.kihara.df@xxxxxxxxxxx>.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
---
v2:
- Add Reviewed-by.
---
drivers/clk/renesas/rcar-gen3-cpg.c | 7 +++++++
drivers/clk/renesas/rcar-gen3-cpg.h | 4 ++++
2 files changed, 11 insertions(+)
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index 628b63b85d3f09c5..7533a51c679bfd54 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -563,6 +563,13 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
return cpg_z_clk_register(core->name, __clk_get_name(parent),
base, CPG_FRQCRC_Z2FC_MASK);
+ case CLK_TYPE_GEN3_OSC:
+ /*
+ * Clock combining OSC EXTAL predivider and a fixed divider
+ */
+ div = cpg_pll_config->osc_prediv * core->div;
+ break;
+
default:
return ERR_PTR(-EINVAL);
}
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
index ea4f8fc3c4c972e7..d7d84d9e4a1c9c8b 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.h
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -23,6 +23,7 @@ enum rcar_gen3_clk_types {
CLK_TYPE_GEN3_PE,
CLK_TYPE_GEN3_Z,
CLK_TYPE_GEN3_Z2,
+ CLK_TYPE_GEN3_OSC, /* OSC EXTAL predivider and fixed divider */
};
#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
@@ -33,6 +34,8 @@ enum rcar_gen3_clk_types {
DEF_BASE(_name, _id, CLK_TYPE_GEN3_PE, \
(_parent_sscg) << 16 | (_parent_clean), \
.div = (_div_sscg) << 16 | (_div_clean))
+#define DEF_GEN3_OSC(_name, _id, _parent, _div) \
+ DEF_BASE(_name, _id, CLK_TYPE_GEN3_OSC, _parent, .div = _div)
struct rcar_gen3_cpg_pll_config {
u8 extal_div;
@@ -40,6 +43,7 @@ struct rcar_gen3_cpg_pll_config {
u8 pll1_div;
u8 pll3_mult;
u8 pll3_div;
+ u8 osc_prediv;
};
#define CPG_RCKCR 0x240
--
2.17.1
