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clk: at91: clk-generated: pass the id of changeable parent at registration

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Pass the ID of changeable parent at registration. This will allow
the scalability of this clock driver with regards to the changeable
parent ID for versions of this IP where changeable parent is not the
last one in the parents list (e.g. SAMA7G5). With this the clock flags
are set to zero in case we have no changeable parent. Also in
clk_generated_best_diff() the *best_diff variable is check against
tmp_diff variable using ">=" operator instead of ">" so that in case
the requested frequency could be obtained using fix parents + gck
dividers but the clock also supports changeable parent to be able
to force the usage of the changeable parent.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1595403506-8209-11-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Claudiu Beznea
2020-07-22 10:38:18 +03:00
committed by Stephen Boyd
parent 42324d953b
commit 64c9247b9e
5 changed files with 37 additions and 35 deletions
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31
drivers/clk/at91/sama5d2.c
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@@ -116,21 +116,20 @@ static const struct {
char *n;
u8 id;
struct clk_range r;
bool pll;
int chg_pid;
} sama5d2_gck[] = {
{ .n = "sdmmc0_gclk", .id = 31, },
{ .n = "sdmmc1_gclk", .id = 32, },
{ .n = "tcb0_gclk", .id = 35, .r = { .min = 0, .max = 83000000 }, },
{ .n = "tcb1_gclk", .id = 36, .r = { .min = 0, .max = 83000000 }, },
{ .n = "pwm_gclk", .id = 38, .r = { .min = 0, .max = 83000000 }, },
{ .n = "isc_gclk", .id = 46, },
{ .n = "pdmic_gclk", .id = 48, },
{ .n = "i2s0_gclk", .id = 54, .pll = true },
{ .n = "i2s1_gclk", .id = 55, .pll = true },
{ .n = "can0_gclk", .id = 56, .r = { .min = 0, .max = 80000000 }, },
{ .n = "can1_gclk", .id = 57, .r = { .min = 0, .max = 80000000 }, },
{ .n = "classd_gclk", .id = 59, .r = { .min = 0, .max = 100000000 },
.pll = true },
{ .n = "sdmmc0_gclk", .id = 31, .chg_pid = INT_MIN, },
{ .n = "sdmmc1_gclk", .id = 32, .chg_pid = INT_MIN, },
{ .n = "tcb0_gclk", .id = 35, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, },
{ .n = "tcb1_gclk", .id = 36, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, },
{ .n = "pwm_gclk", .id = 38, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, },
{ .n = "isc_gclk", .id = 46, .chg_pid = INT_MIN, },
{ .n = "pdmic_gclk", .id = 48, .chg_pid = INT_MIN, },
{ .n = "i2s0_gclk", .id = 54, .chg_pid = 5, },
{ .n = "i2s1_gclk", .id = 55, .chg_pid = 5, },
{ .n = "can0_gclk", .id = 56, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, },
{ .n = "can1_gclk", .id = 57, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, },
{ .n = "classd_gclk", .id = 59, .chg_pid = 5, .r = { .min = 0, .max = 100000000 }, },
};
static const struct clk_programmable_layout sama5d2_programmable_layout = {
@@ -324,8 +323,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
sama5d2_gck[i].n,
parent_names, 6,
sama5d2_gck[i].id,
sama5d2_gck[i].pll,
&sama5d2_gck[i].r);
&sama5d2_gck[i].r,
sama5d2_gck[i].chg_pid);
if (IS_ERR(hw))
goto err_free;