On Wed, Jul 11, 2018 at 04:20:56PM +0200, Geert Uytterhoeven wrote:
> Add a clock type and macro for defining clocks where the parent and
> divider are selected based on the value of the RCKCR.CKSEL bit.
>
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> ---
> drivers/clk/renesas/rcar-gen3-cpg.c | 23 ++++++++++++++++++++---
> drivers/clk/renesas/rcar-gen3-cpg.h | 8 +++++++-
> 2 files changed, 27 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c
> b/drivers/clk/renesas/rcar-gen3-cpg.c
> index 7533a51c679bfd54..19a77822757d29de 100644
> --- a/drivers/clk/renesas/rcar-gen3-cpg.c
> +++ b/drivers/clk/renesas/rcar-gen3-cpg.c
> @@ -1,7 +1,7 @@
> /*
> * R-Car Gen3 Clock Pulse Generator
> *
> - * Copyright (C) 2015-2016 Glider bvba
> + * Copyright (C) 2015-2018 Glider bvba
> *
> * Based on clk-rcar-gen3.c
> *
> @@ -31,6 +31,8 @@
> #define CPG_PLL2CR 0x002c
> #define CPG_PLL4CR 0x01f4
>
> +#define CPG_RCKCR_CKSEL BIT(15) /* RCLK Clock Source Select */
> +
> struct cpg_simple_notifier {
> struct notifier_block nb;
> void __iomem *reg;
> @@ -444,7 +446,7 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct
> device *dev,
> unsigned int div = 1;
> u32 value;
>
> - parent = clks[core->parent & 0xffff]; /* CLK_TYPE_PE uses high bits */
> + parent = clks[core->parent & 0xffff]; /* some types use high bits */
> if (IS_ERR(parent))
> return ERR_CAST(parent);
>
> @@ -524,7 +526,7 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct
> device *dev,
>
> if (clk_get_rate(clks[cpg_clk_extalr])) {
> parent = clks[cpg_clk_extalr];
> - value |= BIT(15);
> + value |= CPG_RCKCR_CKSEL;
> }
>
> writel(value, csn->reg);
> @@ -570,6 +572,21 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct
> device *dev,
> div = cpg_pll_config->osc_prediv * core->div;
> break;
>
> + case CLK_TYPE_GEN3_RCKSEL:
> + /*
> + * Clock selectable between two parents and two fixed dividers
> + * using RCKCR.CKSEL
> + */
> + if (readl(base + CPG_RCKCR) & CPG_RCKCR_CKSEL) {
> + div = core->div & 0xffff;
> + } else {
> + parent = clks[core->parent >> 16];
> + if (IS_ERR(parent))
> + return ERR_CAST(parent);
> + div = core->div >> 16;
> + }
> + 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 d7d84d9e4a1c9c8b..214df713ce719991 100644
> --- a/drivers/clk/renesas/rcar-gen3-cpg.h
> +++ b/drivers/clk/renesas/rcar-gen3-cpg.h
> @@ -1,7 +1,7 @@
> /*
> * R-Car Gen3 Clock Pulse Generator
> *
> - * Copyright (C) 2015-2016 Glider bvba
> + * Copyright (C) 2015-2018 Glider bvba
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License as published by
> @@ -24,6 +24,7 @@ enum rcar_gen3_clk_types {
> CLK_TYPE_GEN3_Z,
> CLK_TYPE_GEN3_Z2,
> CLK_TYPE_GEN3_OSC, /* OSC EXTAL predivider and fixed divider */
> + CLK_TYPE_GEN3_RCKSEL, /* Select parent/divider using RCKCR.CKSEL */
> };
>
> #define DEF_GEN3_SD(_name, _id, _parent, _offset) \
> @@ -37,6 +38,11 @@ enum rcar_gen3_clk_types {
> #define DEF_GEN3_OSC(_name, _id, _parent, _div) \
> DEF_BASE(_name, _id, CLK_TYPE_GEN3_OSC, _parent, .div = _div)
>
> +#define DEF_GEN3_RCKSEL(_name, _id, _parent0, _div0, _parent1, _div1) \
> + DEF_BASE(_name, _id, CLK_TYPE_GEN3_RCKSEL, \
> + (_parent0) << 16 | (_parent1), .div = (_div0) << 16 | (_div1))
> +
> +
There seems to be an extra blank line here.
> struct rcar_gen3_cpg_pll_config {
> u8 extal_div;
> u8 pll1_mult;
> --
> 2.17.1
>
