It turns out that sun4i (A10) and sun5i (A13 & co) do not have sample
clocks, so make them optional.
Since these do not have sample clocks, they cannot (reliably) do
DDR rates, so only set MMC_CAP_1_8V_DDR when we do have sample clks.
Note this patch only changes the devm_clk_get error checking and sets
the clocks to NULL if they don't exists. All the clk_foo calls accept
a NULL clk and will return success when called with a NULL clk, so this
is all that is necessary.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/mmc/host/sunxi-mmc.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 71a480b..4552ee0 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -1016,14 +1016,20 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
host->clk_output = devm_clk_get(&pdev->dev, "output");
if (IS_ERR(host->clk_output)) {
- dev_err(&pdev->dev, "Could not get output clock\n");
- return PTR_ERR(host->clk_output);
+ if (PTR_ERR(host->clk_output) != -ENOENT) {
+ dev_err(&pdev->dev, "Could not get output clock\n");
+ return PTR_ERR(host->clk_output);
+ }
+ host->clk_output = NULL;
}
host->clk_sample = devm_clk_get(&pdev->dev, "sample");
if (IS_ERR(host->clk_sample)) {
- dev_err(&pdev->dev, "Could not get sample clock\n");
- return PTR_ERR(host->clk_sample);
+ if (PTR_ERR(host->clk_sample) != -ENOENT) {
+ dev_err(&pdev->dev, "Could not get sample clock\n");
+ return PTR_ERR(host->clk_sample);
+ }
+ host->clk_sample = NULL;
}
host->reset = devm_reset_control_get_optional(&pdev->dev, "ahb");
@@ -1126,9 +1132,11 @@ static int sunxi_mmc_probe(struct platform_device *pdev)
mmc->f_min = 400000;
mmc->f_max = 52000000;
mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED |
- MMC_CAP_1_8V_DDR |
MMC_CAP_ERASE | MMC_CAP_SDIO_IRQ;
+ if (host->clk_output && host->clk_sample)
+ mmc->caps |= MMC_CAP_1_8V_DDR;
+
ret = mmc_of_parse(mmc);
if (ret)
goto error_free_dma;
--
2.7.4
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