On Tue, Oct 15, 2024 at 04:33:26PM +0800, Richard Zhu wrote:
> 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.
>
So this means the driver won't work with old devicetrees. Am I right? Then you
are breaking the DT compatibility.
You should make the clock optional in the driver.
- Mani
> Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx>
> Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
> ---
> 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
>
--
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