Hi,
On 05/08/20 3:48 pm, Chee Hong Ang wrote:
If the QSPI clock is not set (read as 0), QSPI driver probe shall fail and prevent further QSPI access.
Signed-off-by: Chee Hong Ang chee.hong.ang@intel.com
drivers/spi/cadence_qspi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c index 1e85749209..3bb5c7031d 100644 --- a/drivers/spi/cadence_qspi.c +++ b/drivers/spi/cadence_qspi.c @@ -170,6 +170,9 @@ static int cadence_spi_probe(struct udevice *bus) struct clk clk; int ret;
- if (!CONFIG_CQSPI_REF_CLK)
return -ENODEV;This seems broken to me...
Most platforms have moved away from passing clk freq via CONFIG_ and are using more scalable DT or platdata approach where freq is obtained via
I think the proper way to resolve this is to change our clock driver to DM. Thanks.
clk_get_*() APIs... See few lines below:
if (plat->ref_clk_hz == 0) { ret = clk_get_by_index(bus, 0, &clk); if (ret) {#ifdef CONFIG_CQSPI_REF_CLK plat->ref_clk_hz = CONFIG_CQSPI_REF_CLK; #else return ret; #endif } else { plat->ref_clk_hz = clk_get_rate(&clk); clk_free(&clk); if (IS_ERR_VALUE(plat->ref_clk_hz)) return plat->ref_clk_hz; } }
So there is no need to make CONFIG_CQSPI_REF_CLK mandatory. Probe may fail only when CONFIG_CQSPI_REF_CLK is undefined and there is no reference to a valid clk device either.
priv->regbase = plat->regbase; priv->ahbbase = plat->ahbbase;
Regards Vignesh