Hi Geert, Thank you for the review. On Fri, Jul 12, 2024 at 12:59 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: > > Hi Prabhakar, > > On Thu, Jun 27, 2024 at 6:14 PM Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote: > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > > > Add family-specific clock driver for RZ/V2H(P) SoCs. > > > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > --- > > v2->v3 > > - Dropped num_hw_resets from struct rzv2h_cpg_priv > > - Dropped range_check for module clocks > > - Made mon_index to s8 instead of u8 in struct rzv2h_mod_clk > > - Added support for critical module clocks with DEF_MOD_CRITICAL > > - Added check for mon_index in rzv2h_mod_clock_endisable and > > rzv2h_mod_clock_is_enabled() > > Thanks for the update! > > > --- /dev/null > > +++ b/drivers/clk/renesas/rzv2h-cpg.c > > > +static struct clk * __init > > +rzv2h_cpg_pll_clk_register(const struct cpg_core_clk *core, > > + struct rzv2h_cpg_priv *priv, > > + const struct clk_ops *ops) > > +{ > > + void __iomem *base = priv->base; > > + struct clk **clks = priv->clks; > > + struct device *dev = priv->dev; > > + struct clk_init_data init; > > + const struct clk *parent; > > + const char *parent_name; > > + struct pll_clk *pll_clk; > > + > > + parent = clks[core->parent & 0xffff]; > > No need to mask with 0xffff, as nothing is ever stored in the high bits. > OK, I will drop it. > > +static void __init > > +rzv2h_cpg_register_mod_clk(const struct rzv2h_mod_clk *mod, > > + struct rzv2h_cpg_priv *priv) > > +{ > > + struct mod_clock *clock = NULL; > > + struct device *dev = priv->dev; > > + struct clk_init_data init; > > + unsigned int id = mod->id; > > This is the sole user of mod->id, which can be calculated easily from > mod->on_index and mod->on_bit. > Agreed, I will drop id. > > --- /dev/null > > +++ b/drivers/clk/renesas/rzv2h-cpg.h > > > +/** > > + * struct rzv2h_mod_clk - Module Clocks definitions > > + * > > + * @name: handle between common and hardware-specific interfaces > > + * @parent: id of parent clock > > + * @id: clock index in array containing all Core and Module Clocks > > + * @critical: flag to indicate the clock is critical > > + * @on_index: control register index > > + * @on_bit: ON bit > > + * @mon_index: monitor register index > > + * @mon_bit: monitor bit > > + */ > > +struct rzv2h_mod_clk { > > + const char *name; > > + unsigned int parent; > > + unsigned int id; > > No need to store the id, as it can be calculated when needed. > OK. > > + bool critical; > > + u8 on_index; > > + u8 on_bit; > > + s8 mon_index; > > + u8 mon_bit; > > That leaves us with 1 64-bit pointer, 1 32-bit integer, and 5 bytes. > Using bitfields for the latter is complicated due to the mix of signed > and unsigned values. > However, parent can be reduced to u16, shaving off one 64-bit word > from each entry. > Agreed, I will update parent to u16. > > +}; > > > +/** > > + * struct rzv2h_reset - Reset definitions > > + * > > + * @reset_index: reset register index > > + * @reset_bit: reset bit > > + * @mon_index: monitor register index > > + * @mon_bit: monitor bit > > + */ > > +struct rzv2h_reset { > > + u8 reset_index; > > + u8 reset_bit; > > + u8 mon_index; > > + u8 mon_bit; > > +}; > > + > > +#define RST_ID(x, y) ((((x) * 16)) + (y)) > > + > > +#define DEF_RST_BASE(_id, _resindex, _resbit, _monindex, _monbit) \ > > + [_id] = { \ > > Indexing by _id means the reset array will be very sparse. E.g. the > innocent-looking r9a09g057_resets[] with only a single entry takes > 600 bytes. > > If you do need the full array for indexing, please allocate and > populate it at runtime. > OK, I will use the radix tree for resets (is that OK)? > As a bonus, you would no longer need rzv2h_cpg_info.info, and > r9a09g057_resets[] and r9a09g057_cpg_info[] can become __initconst. > Agreed (and also r9a09g057_mod_clks). Cheers, Prabhakar