[PATCH v4 2/9] PCI: imx6: Add ref clock for i.MX95 PCIe

Richard Zhu
2024-10-15T08:57:26Z

Add "ref" clock to enable reference clock.

If use external clock, ref clock should point to external reference.

If use internal clock, CREF_EN in LAST_TO_REG controls reference output,
which implement in drivers/clk/imx/clk-imx95-blk-ctl.c.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
drivers/pci/controller/dwc/pci-imx6.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 808d1f105417..52a8b2dc828a 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1480,6 +1480,7 @@ static const char * const imx8mm_clks[] = {"pcie_bus", "pcie", "pcie_aux"};
static const char * const imx8mq_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux"};
static const char * const imx6sx_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_inbound_axi"};
static const char * const imx8q_clks[] = {"mstr", "slv", "dbi"};
+static const char * const imx95_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux", "ref"};

static const struct imx_pcie_drvdata drvdata[] = {
[IMX6Q] = {
@@ -1593,8 +1594,8 @@ static const struct imx_pcie_drvdata drvdata[] = {
[IMX95] = {
.variant = IMX95,
.flags = IMX_PCIE_FLAG_HAS_SERDES,
- .clk_names = imx8mq_clks,
- .clks_cnt = ARRAY_SIZE(imx8mq_clks),
+ .clk_names = imx95_clks,
+ .clks_cnt = ARRAY_SIZE(imx95_clks),
.ltssm_off = IMX95_PE0_GEN_CTRL_3,
.ltssm_mask = IMX95_PCIE_LTSSM_EN,
.mode_off[0] = IMX95_PE0_GEN_CTRL_1,
--
2.37.1