by Rob Herring (Arm)

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Subject: Re: [PATCH v1 01/14] dt-bindings: clk: microchip: mpfs: add reset controller support

On Thu, 30 Jun 2022 09:05:20 +0100, Conor Dooley wrote:
> The "peripheral" devices on PolarFire SoC can be put into reset, so
> update the device tree binding to reflect the presence of a reset
> controller.
>
> Signed-off-by: Conor Dooley <[email protected]>
> ---
> .../bindings/clock/microchip,mpfs.yaml | 17 +++++++++++++++--
> 1 file changed, 15 insertions(+), 2 deletions(-)
>

Reviewed-by: Rob Herring <[email protected]>

2022-07-02 15:12:20

by Conor Dooley

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Subject: Re: [PATCH v1 13/14] clk: microchip: mpfs: convert cfg_clk to clk_divider

On 30/06/2022 09:05, Conor Dooley wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> The cfg_clk struct is now just a redefinition of the clk_divider struct
> with custom implentations of the ops, that implement an extra level of
> redirection. Remove the custom struct and replace it with clk_divider.

Looks like I forgot to assign the spinlock in this and the periph_clk
patches. I'm respinning anyway to fix Philipp's comments on the reset
controller & to drop the two net-next patches so I'll fix this too.
Thanks,
Conor.

>
> Signed-off-by: Conor Dooley <[email protected]>
> ---
> drivers/clk/microchip/clk-mpfs.c | 75 +++-----------------------------
> 1 file changed, 7 insertions(+), 68 deletions(-)
>
> diff --git a/drivers/clk/microchip/clk-mpfs.c b/drivers/clk/microchip/clk-mpfs.c
> index e58d0bc4669a..c4d1c48d6d3d 100644
> --- a/drivers/clk/microchip/clk-mpfs.c
> +++ b/drivers/clk/microchip/clk-mpfs.c
> @@ -51,24 +51,13 @@ struct mpfs_msspll_hw_clock {
>
> #define to_mpfs_msspll_clk(_hw) container_of(_hw, struct mpfs_msspll_hw_clock, hw)
>
> -struct mpfs_cfg_clock {
> - void __iomem *reg;
> - const struct clk_div_table *table;
> - u8 shift;
> - u8 width;
> - u8 flags;
> -};
> -
> struct mpfs_cfg_hw_clock {
> - struct mpfs_cfg_clock cfg;
> - struct clk_hw hw;
> + struct clk_divider cfg;
> struct clk_init_data init;
> unsigned int id;
> u32 reg_offset;
> };
>
> -#define to_mpfs_cfg_clk(_hw) container_of(_hw, struct mpfs_cfg_hw_clock, hw)
> -
> struct mpfs_periph_clock {
> void __iomem *reg;
> u8 shift;
> @@ -228,56 +217,6 @@ static int mpfs_clk_register_mssplls(struct device *dev, struct mpfs_msspll_hw_c
> * "CFG" clocks
> */
>
> -static unsigned long mpfs_cfg_clk_recalc_rate(struct clk_hw *hw, unsigned long prate)
> -{
> - struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw);
> - struct mpfs_cfg_clock *cfg = &cfg_hw->cfg;
> - u32 val;
> -
> - val = readl_relaxed(cfg->reg) >> cfg->shift;
> - val &= clk_div_mask(cfg->width);
> -
> - return divider_recalc_rate(hw, prate, val, cfg->table, cfg->flags, cfg->width);
> -}
> -
> -static long mpfs_cfg_clk_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate)
> -{
> - struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw);
> - struct mpfs_cfg_clock *cfg = &cfg_hw->cfg;
> -
> - return divider_round_rate(hw, rate, prate, cfg->table, cfg->width, 0);
> -}
> -
> -static int mpfs_cfg_clk_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long prate)
> -{
> - struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw);
> - struct mpfs_cfg_clock *cfg = &cfg_hw->cfg;
> - unsigned long flags;
> - u32 val;
> - int divider_setting;
> -
> - divider_setting = divider_get_val(rate, prate, cfg->table, cfg->width, 0);
> -
> - if (divider_setting < 0)
> - return divider_setting;
> -
> - spin_lock_irqsave(&mpfs_clk_lock, flags);
> - val = readl_relaxed(cfg->reg);
> - val &= ~(clk_div_mask(cfg->width) << cfg_hw->cfg.shift);
> - val |= divider_setting << cfg->shift;
> - writel_relaxed(val, cfg->reg);
> -
> - spin_unlock_irqrestore(&mpfs_clk_lock, flags);
> -
> - return 0;
> -}
> -
> -static const struct clk_ops mpfs_clk_cfg_ops = {
> - .recalc_rate = mpfs_cfg_clk_recalc_rate,
> - .round_rate = mpfs_cfg_clk_round_rate,
> - .set_rate = mpfs_cfg_clk_set_rate,
> -};
> -
> #define CLK_CFG(_id, _name, _parent, _shift, _width, _table, _flags, _offset) { \
> .id = _id, \
> .cfg.shift = _shift, \
> @@ -285,7 +224,7 @@ static const struct clk_ops mpfs_clk_cfg_ops = {
> .cfg.table = _table, \
> .reg_offset = _offset, \
> .cfg.flags = _flags, \
> - .hw.init = CLK_HW_INIT(_name, _parent, &mpfs_clk_cfg_ops, 0), \
> + .cfg.hw.init = CLK_HW_INIT(_name, _parent, &clk_divider_ops, 0), \
> }
>
> static struct mpfs_cfg_hw_clock mpfs_cfg_clks[] = {
> @@ -302,8 +241,8 @@ static struct mpfs_cfg_hw_clock mpfs_cfg_clks[] = {
> .cfg.table = mpfs_div_rtcref_table,
> .reg_offset = REG_RTC_CLOCK_CR,
> .cfg.flags = CLK_DIVIDER_ONE_BASED,
> - .hw.init =
> - CLK_HW_INIT_PARENTS_DATA("clk_rtcref", mpfs_ext_ref, &mpfs_clk_cfg_ops, 0),
> + .cfg.hw.init =
> + CLK_HW_INIT_PARENTS_DATA("clk_rtcref", mpfs_ext_ref, &clk_divider_ops, 0),
> }
> };
>
> @@ -317,13 +256,13 @@ static int mpfs_clk_register_cfgs(struct device *dev, struct mpfs_cfg_hw_clock *
> struct mpfs_cfg_hw_clock *cfg_hw = &cfg_hws[i];
>
> cfg_hw->cfg.reg = data->base + cfg_hw->reg_offset;
> - ret = devm_clk_hw_register(dev, &cfg_hw->hw);
> + ret = devm_clk_hw_register(dev, &cfg_hw->cfg.hw);
> if (ret)
> return dev_err_probe(dev, ret, "failed to register clock id: %d\n",
> cfg_hw->id);
>
> id = cfg_hw->id;
> - data->hw_data.hws[id] = &cfg_hw->hw;
> + data->hw_data.hws[id] = &cfg_hw->cfg.hw;
> }
>
> return 0;
> @@ -393,7 +332,7 @@ static const struct clk_ops mpfs_periph_clk_ops = {
> _flags), \
> }
>
> -#define PARENT_CLK(PARENT) (&mpfs_cfg_clks[CLK_##PARENT].hw)
> +#define PARENT_CLK(PARENT) (&mpfs_cfg_clks[CLK_##PARENT].cfg.hw)
>
> /*
> * Critical clocks:
> --
> 2.36.1
>
>
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