[PATCH 5/6] clk: imx: keep hsio bus clock always on

[Peng Fan (OSS)]

From: Jacky Bai <ping.bai at nxp.com>

During Linux System suspend/resume stress test after System Sleep
enabled, system will stuck sometimes. It is because NICMIX is powered
down, which HSIOMIX(always on) is not powered down. When NICMIX
powering down, HSIOMIX will get a hardware handshake, without HSIO ROOT
clk, the handshake will lose. Then after NICMIX power on when system
resume, the access to HSIOMIX through NICMIX would be broken. So keep HSIO
ROOT always on.

Reviewed-by: Peng Fan <peng.fan at nxp.com>
Signed-off-by: Jacky Bai <ping.bai at nxp.com>
 [Peng Fan] rewrite commit message
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 drivers/clk/imx/clk-imx93.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx93.c b/drivers/clk/imx/clk-imx93.c
index 422ad3c89845..74e8d810db7f 100644
--- a/drivers/clk/imx/clk-imx93.c
+++ b/drivers/clk/imx/clk-imx93.c
@@ -109,7 +109,7 @@ static const struct imx93_clk_root {
 	{ IMX93_CLK_CCM_CKO2,		"ccm_cko2_root",	0x1d00,	CKO2_SEL, },
 	{ IMX93_CLK_CCM_CKO3,		"ccm_cko3_root",	0x1d80,	CKO1_SEL, },
 	{ IMX93_CLK_CCM_CKO4,		"ccm_cko4_root",	0x1e00,	CKO2_SEL, },
-	{ IMX93_CLK_HSIO,		"hsio_root",		0x1e80,	LOW_SPEED_IO_SEL, },
+	{ IMX93_CLK_HSIO,		"hsio_root",		0x1e80,	LOW_SPEED_IO_SEL, CLK_IS_CRITICAL},
 	{ IMX93_CLK_HSIO_USB_TEST_60M,	"hsio_usb_test_60m_root", 0x1f00, LOW_SPEED_IO_SEL, },
 	{ IMX93_CLK_HSIO_ACSCAN_80M,	"hsio_acscan_80m_root",	0x1f80,	LOW_SPEED_IO_SEL, },
 	{ IMX93_CLK_HSIO_ACSCAN_480M,	"hsio_acscan_480m_root", 0x2000, MISC_SEL, },
-- 
2.37.1