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Date: Tue, 11 Jan 2022 15:23:02 +0000 From: <Claudiu.Beznea@...rochip.com> To: <Tudor.Ambarus@...rochip.com>, <mturquette@...libre.com>, <sboyd@...nel.org> CC: <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com>, <robh+dt@...nel.org>, <rdunlap@...radead.org>, <unixbhaskar@...il.com>, <linux-clk@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org> Subject: Re: [PATCH] clk: at91: sama7g5: Allow MCK1 to be exported and referenced in DT On 11.01.2022 14:53, Tudor Ambarus wrote: > MCK1 feeds the External Bus Interface (EBI). EBI's clock rate is used > to translate EBI's timmings to SMC timings, thus we need to handle MCK1 > in the EBI driver. Allow MCK1 to be referenced as a PMC_TYPE_CORE clock > from phandle in DT. > > Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@...rochip.com> > --- > drivers/clk/at91/sama7g5.c | 8 +++++++- > include/dt-bindings/clock/at91.h | 1 + > 2 files changed, 8 insertions(+), 1 deletion(-) > > diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c > index 369dfafabbca..e43458673afb 100644 > --- a/drivers/clk/at91/sama7g5.c > +++ b/drivers/clk/at91/sama7g5.c > @@ -302,6 +302,7 @@ static const struct { > * @ep_count: extra parents count > * @ep_mux_table: mux table for extra parents > * @id: clock id > + * @eid: export index in sama7g5->chws[] array > * @c: true if clock is critical and cannot be disabled > */ > static const struct { > @@ -311,6 +312,7 @@ static const struct { > u8 ep_count; > u8 ep_mux_table[4]; > u8 id; > + u8 eid; > u8 c; > } sama7g5_mckx[] = { > { .n = "mck1", > @@ -319,6 +321,7 @@ static const struct { > .ep_mux_table = { 5, }, > .ep_count = 1, > .ep_chg_id = INT_MIN, > + .eid = PMC_MCK1, > .c = 1, }, > > { .n = "mck2", > @@ -913,7 +916,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np) > if (IS_ERR(regmap)) > return; > > - sama7g5_pmc = pmc_data_allocate(PMC_CPU + 1, > + sama7g5_pmc = pmc_data_allocate(PMC_MCK1 + 1, > nck(sama7g5_systemck), > nck(sama7g5_periphck), > nck(sama7g5_gck), 8); > @@ -1027,6 +1030,9 @@ static void __init sama7g5_pmc_setup(struct device_node *np) > goto err_free; > > alloc_mem[alloc_mem_size++] = mux_table; > + > + if (sama7g5_mckx[i].eid) > + sama7g5_pmc->chws[sama7g5_mckx[i].eid] = hw; > } > > hw = at91_clk_sama7g5_register_utmi(regmap, "utmick", "main_xtal"); > diff --git a/include/dt-bindings/clock/at91.h b/include/dt-bindings/clock/at91.h > index 98e1b2ab6403..8498c0cd95fe 100644 > --- a/include/dt-bindings/clock/at91.h > +++ b/include/dt-bindings/clock/at91.h > @@ -35,6 +35,7 @@ > #define PMC_AUDIOIOPLL (PMC_MAIN + 7) > #define PMC_ETHPLL (PMC_MAIN + 8) > #define PMC_CPU (PMC_MAIN + 9) > +#define PMC_MCK1 (PMC_MAIN + 10) > > #ifndef AT91_PMC_MOSCS > #define AT91_PMC_MOSCS 0 /* MOSCS Flag */
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