diff options
| author | Angus Ainslie (Purism) <angus@akkea.ca> | 2019-03-29 18:21:29 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-04-26 14:48:21 +0300 |
| commit | 941acd566b1807b291bbdca31cc5158e26ffcf83 (patch) | |
| tree | 8670e1567ce9b9d95c5a85e41da13979cfb3c713 /drivers/dma | |
| parent | 9e1630b809ec2a6bf3248441563669fcd1e02646 (diff) | |
| download | linux-941acd566b1807b291bbdca31cc5158e26ffcf83.tar.xz | |
dmaengine: imx-sdma: Only check ratio on parts that support 1:1
On imx8mq B0 chip, AHB/SDMA clock ratio 2:1 can't be supported,
since SDMA clock ratio has to be increased to 250Mhz, AHB can't reach
to 500Mhz, so use 1:1 instead.
To limit this change to the imx8mq for now this patch also adds an
im8mq-sdma compatible string.
Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>
Acked-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/imx-sdma.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 5f3c1378b90e..99d9f431ae2c 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -419,6 +419,7 @@ struct sdma_driver_data { int chnenbl0; int num_events; struct sdma_script_start_addrs *script_addrs; + bool check_ratio; }; struct sdma_engine { @@ -557,6 +558,13 @@ static struct sdma_driver_data sdma_imx7d = { .script_addrs = &sdma_script_imx7d, }; +static struct sdma_driver_data sdma_imx8mq = { + .chnenbl0 = SDMA_CHNENBL0_IMX35, + .num_events = 48, + .script_addrs = &sdma_script_imx7d, + .check_ratio = 1, +}; + static const struct platform_device_id sdma_devtypes[] = { { .name = "imx25-sdma", @@ -580,6 +588,9 @@ static const struct platform_device_id sdma_devtypes[] = { .name = "imx7d-sdma", .driver_data = (unsigned long)&sdma_imx7d, }, { + .name = "imx8mq-sdma", + .driver_data = (unsigned long)&sdma_imx8mq, + }, { /* sentinel */ } }; @@ -593,6 +604,7 @@ static const struct of_device_id sdma_dt_ids[] = { { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, }, { .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, }, { .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, }, + { .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sdma_dt_ids); @@ -1852,7 +1864,8 @@ static int sdma_init(struct sdma_engine *sdma) if (ret) goto disable_clk_ipg; - if (clk_get_rate(sdma->clk_ahb) == clk_get_rate(sdma->clk_ipg)) + if (sdma->drvdata->check_ratio && + (clk_get_rate(sdma->clk_ahb) == clk_get_rate(sdma->clk_ipg))) sdma->clk_ratio = 1; /* Be sure SDMA has not started yet */ |