Hi Sergei,
On Tue, Nov 8, 2016 at 10:17 PM, Sergei Shtylyov
<[email protected]> wrote:
> Add the common R-Car Gen2 (and RZ/G) Clock Pulse Generator / Module Standby
> and Software Reset support code, using the CPG/MSSR driver core.
>
> Based on the proof-of-concept R8A7791 CPG/MSSR patch by Geert Uytterhoeven
> <[email protected]>.
>
> Signed-off-by: Sergei Shtylyov <[email protected]>
> Reviewed-by: Geert Uytterhoeven <[email protected]>
>
> ---
> This patch is against the 'clk-next' branch of CLK group's 'linux.git' repo.
>
> Changes in version 4:
> - added a static variable for the PLL0 divisor and a parameter of the same
> kind
> to rcar_gen2_cpg_init(), used that variable in
> rcar_gen2_cpg_clk_register().
Thanks, I've verified correct operation by using your r8a7743 driver on
r8a7791/koelsch, and comparing /sys/kernel/debug/clk/clk_summary.
> Changes in version 3:
> - removed the divisor logic from the PLL0 related code;
> - also mentioned R-Car V2H as not having the PLL0CR register.
>
> Changes in version 2:
> - added support for non-existing PLL0CR;
> - removed the function reading the mode pins;
> - added/used the #define's for PLL0CR.STC;
> - used CPG_FRQCRC_ZFC_SHIFT to #define CPG_FRQCRC_ZFC_MASK;
> - removed rcar_gen2_read_modemr();
> - added Geert's tag.
>
> drivers/clk/renesas/rcar-gen2-cpg.c | 370
> ++++++++++++++++++++++++++++++++++++
> drivers/clk/renesas/rcar-gen2-cpg.h | 43 ++++
> 2 files changed, 413 insertions(+)
>
> Index: linux/drivers/clk/renesas/rcar-gen2-cpg.c
> ===================================================================
> --- /dev/null
> +++ linux/drivers/clk/renesas/rcar-gen2-cpg.c
> +static u32 cpg_mode __initdata;
cpg_mode is never set.
> +
> +struct clk * __init rcar_gen2_cpg_clk_register(struct device *dev,
> + const struct cpg_core_clk
> *core,
> + const struct cpg_mssr_info
> *info,
> + struct clk **clks,
> + void __iomem *base)
> +{
> + switch (core->type) {
> + case CLK_TYPE_GEN2_LB:
> + div = cpg_mode & BIT(18) ? 36 : 24;
Hence div may be incorrect here (it wasn't for me)...
> + case CLK_TYPE_GEN2_QSPI:
> + div = (cpg_mode & (BIT(3) | BIT(2) | BIT(1))) == BIT(2) ?
> + 8 : 10;
... and here (it was for me).
> +int __init rcar_gen2_cpg_init(const struct rcar_gen2_cpg_pll_config *config,
> + unsigned int pll0_div)
I'll add a "u32 mode" parameter here, and pass it from
r8a774[35]_cpg_mssr_init().
> +{
> + cpg_pll_config = config;
> + cpg_pll0_div = pll0_div;
cpg_mode = mode;
No need to resend, fixing it up myself.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
