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clk: renesas: rcar-gen3: Add support for mode pin clock selection

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Make the existing support for selecting between clean and SSCG clocks
using MD12 more generic, to allow using other mode pins for arbitrary
clock selection.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Geert Uytterhoeven 2018-07-11 14:19:47 +02:00
parent 4f57998d64
commit cd51e427e0
2 changed files with 13 additions and 10 deletions
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10
drivers/clk/renesas/rcar-gen3-cpg.c
View file

@ -539,16 +539,14 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
parent = clks[cpg_clk_extalr];
break;
case CLK_TYPE_GEN3_PE:
case CLK_TYPE_GEN3_MDSEL:
/*
* Peripheral clock with a fixed divider, selectable between
* clean and spread spectrum parents using MD12
* Clock selectable between two parents and two fixed dividers
* using a mode pin
*/
if (cpg_mode & BIT(12)) {
/* Clean */
if (cpg_mode & BIT(core->offset)) {
div = core->div & 0xffff;
} else {
/* SCCG */
parent = clks[core->parent >> 16];
if (IS_ERR(parent))
return ERR_CAST(parent);

13
drivers/clk/renesas/rcar-gen3-cpg.h
View file

@ -20,7 +20,7 @@ enum rcar_gen3_clk_types {
CLK_TYPE_GEN3_PLL4,
CLK_TYPE_GEN3_SD,
CLK_TYPE_GEN3_R,
CLK_TYPE_GEN3_PE,
CLK_TYPE_GEN3_MDSEL, /* Select parent/divider using mode pin */
CLK_TYPE_GEN3_Z,
CLK_TYPE_GEN3_Z2,
CLK_TYPE_GEN3_OSC, /* OSC EXTAL predivider and fixed divider */
@ -30,11 +30,16 @@ 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_MDSEL(_name, _id, _md, _parent0, _div0, _parent1, _div1) \
DEF_BASE(_name, _id, CLK_TYPE_GEN3_MDSEL, \
(_parent0) << 16 | (_parent1), \
.div = (_div0) << 16 | (_div1), .offset = _md)
#define DEF_GEN3_PE(_name, _id, _parent_sscg, _div_sscg, _parent_clean, \
_div_clean) \
DEF_BASE(_name, _id, CLK_TYPE_GEN3_PE, \
(_parent_sscg) << 16 | (_parent_clean), \
.div = (_div_sscg) << 16 | (_div_clean))
DEF_GEN3_MDSEL(_name, _id, 12, _parent_sscg, _div_sscg, \
_parent_clean, _div_clean)
#define DEF_GEN3_OSC(_name, _id, _parent, _div) \
DEF_BASE(_name, _id, CLK_TYPE_GEN3_OSC, _parent, .div = _div)