clk: at91: sama7g5: Allow MCK1 to be exported and referenced in DT

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@microchip.com>
Link: https://lore.kernel.org/r/20220111125310.902856-1-tudor.ambarus@microchip.com
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c
index 369dfafabbca267cd38a501a2190b342355f3ff7..e43458673afbb31b1633788256c640e72fcc746e 100644 (file)
--- 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 573cf8c25eb4c8ba0886b59fb38867c8d7bcc8ee..3e3972a814c1e6dc6781b5117c463ab2b27488f7 100644 (file)
--- a/include/dt-bindings/clock/at91.h
+++ b/include/dt-bindings/clock/at91.h
@@ -36,6 +36,7 @@
 #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 */