Hey Sricharan,
On 4/11/2018 10:28 PM, Sricharan R wrote:
Hi Austin,
On 4/5/2018 1:14 AM, Austin Christ wrote:
Add support for Qualcomm Centriq devices that are qup-v2 compatible but
do not support DMA, so nodma needs to be set.
Signed-off-by: Austin Christ <austinwc@xxxxxxxxxxxxxx>
---
v1:
- Initial
v2:
- Remove whitespace error
---
drivers/i2c/busses/i2c-qup.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c
index 904dfec..80af973 100644
--- a/drivers/i2c/busses/i2c-qup.c
+++ b/drivers/i2c/busses/i2c-qup.c
@@ -1648,6 +1648,14 @@ static void qup_i2c_disable_clocks(struct qup_i2c_dev *qup)
clk_disable_unprepare(qup->pclk);
}
+#if IS_ENABLED(CONFIG_ACPI)
+static const struct acpi_device_id qup_i2c_acpi_match[] = {
+ { "QCOM8010"},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, qup_i2c_acpi_match);
+#endif
+
static int qup_i2c_probe(struct platform_device *pdev)
{
static const int blk_sizes[] = {4, 16, 32};
@@ -1675,6 +1683,12 @@ static int qup_i2c_probe(struct platform_device *pdev)
DEFAULT_CLK_FREQ);
}
+ if (acpi_match_device(qup_i2c_acpi_match, qup->dev)) {
+ qup->adap.algo = &qup_i2c_algo_v2;
+ is_qup_v1 = false;
+ goto nodma;
+ }
+
What happens without the above check. Does it not get resolved below,
when qup_i2c_req_dma fails ?
Regards,
Sricharan
Yes currently qup_i2c_req_dma fails and then the nodma: path is chosen.
However, this causes unexpected logging of "tx channel not available"
for the Centriq platform. This seemed a more correct solution to those
incorrect logging statements than lowering the dev_err to dev_info or
dev_notify.
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