[PATCH] clk: eswin: Add CLK_IGNORE_UNUSED to NoC clock

[dongxuyang@eswincomputing.com]

From: Xuyang Dong <dongxuyang@eswincomputing.com>

The gate_noc_nsp_clk provides the essential clock source for NPU,
DSP, and PCIe subsystems. During kernel init, the clock framework
attempts to disable unused clocks when clk_ignore_unused kernel
parameter is not set.
However, gate_noc_nsp_clk is required to remain enabled for these
critical subsystems to function properly, causing PCIe boot failures
when auto-disabled.

Add CLK_IGNORE_UNUSED flag to gate_noc_nsp_clk to ensure it stays
enabled even when clk_ignore_unused is not specified in kernel
command line.

Fixes: cd44f127c1d4 ("clk: eswin: Add eic7700 clock driver")
Signed-off-by: Xuyang Dong <dongxuyang@eswincomputing.com>
---
 drivers/clk/eswin/clk-eic7700.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/eswin/clk-eic7700.c b/drivers/clk/eswin/clk-eic7700.c
index be81d74192da..43a47fe16ab1 100644
--- a/drivers/clk/eswin/clk-eic7700.c
+++ b/drivers/clk/eswin/clk-eic7700.c
@@ -791,7 +791,8 @@ static struct eswin_clk_info eic7700_clks[] = {
 			EIC7700_CLK_MUX_CPU_ROOT_3MUX1_GFREE,
 			CLK_SET_RATE_PARENT, EIC7700_REG_OFFSET_U84, 27, 0),
 	ESWIN_GATE_TYPE(EIC7700_CLK_GATE_NOC_NSP_CLK, "gate_noc_nsp_clk",
-			EIC7700_CLK_DIV_NOC_NSP_DYNM, CLK_SET_RATE_PARENT,
+			EIC7700_CLK_DIV_NOC_NSP_DYNM,
+			CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
 			EIC7700_REG_OFFSET_NOC, 31, 0),
 	ESWIN_GATE_TYPE(EIC7700_CLK_GATE_BOOTSPI, "gate_clk_bootspi",
 			EIC7700_CLK_MUX_BOOTSPI_CLK_2MUX1_GFREE,
-- 
2.34.1