diff options
author | Dhruva Gole <d-gole@ti.com> | 2023-08-29 09:27:08 +0300 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2023-09-11 03:32:21 +0300 |
commit | 0578a6dbfe7514db7134501cf93acc21cf13e479 (patch) | |
tree | 3a3d84783f72b576c962622d622a4b45d0ddf065 /drivers | |
parent | eb9913b511f10968a02cfa5329a896855dd152a3 (diff) | |
download | linux-0578a6dbfe7514db7134501cf93acc21cf13e479.tar.xz |
spi: spi-cadence-quadspi: add runtime pm support
Add runtime pm support to cadence-qspi driver, this allows the driver to
suspend whenever it's is not actively being used thus reducing active
power consumed by the system.
Also, with the use of devm_pm_runtime_enable we no longer need the
fallback probe_pm_failed that used to pm_runtime_disable
Co-developed-by: Apurva Nandan <a-nandan@ti.com>
Signed-off-by: Apurva Nandan <a-nandan@ti.com>
Signed-off-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/r/20230829062706.786637-1-d-gole@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/spi/spi-cadence-quadspi.c | 42 |
1 files changed, 33 insertions, 9 deletions
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index b50db71ac4cc..4828da4587c5 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -116,6 +116,9 @@ struct cqspi_driver_platdata { #define CQSPI_TIMEOUT_MS 500 #define CQSPI_READ_TIMEOUT_MS 10 +/* Runtime_pm autosuspend delay */ +#define CQSPI_AUTOSUSPEND_TIMEOUT 2000 + #define CQSPI_DUMMY_CLKS_PER_BYTE 8 #define CQSPI_DUMMY_BYTES_MAX 4 #define CQSPI_DUMMY_CLKS_MAX 31 @@ -1407,8 +1410,20 @@ static int cqspi_mem_process(struct spi_mem *mem, const struct spi_mem_op *op) static int cqspi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) { int ret; + struct cqspi_st *cqspi = spi_master_get_devdata(mem->spi->master); + struct device *dev = &cqspi->pdev->dev; + + ret = pm_runtime_resume_and_get(dev); + if (ret) { + dev_err(&mem->spi->dev, "resume failed with %d\n", ret); + return ret; + } ret = cqspi_mem_process(mem, op); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + if (ret) dev_err(&mem->spi->dev, "operation failed with %d\n", ret); @@ -1753,10 +1768,10 @@ static int cqspi_probe(struct platform_device *pdev) if (irq < 0) return -ENXIO; - pm_runtime_enable(dev); - ret = pm_runtime_resume_and_get(dev); - if (ret < 0) - goto probe_pm_failed; + ret = pm_runtime_set_active(dev); + if (ret) + return ret; + ret = clk_prepare_enable(cqspi->clk); if (ret) { @@ -1862,21 +1877,29 @@ static int cqspi_probe(struct platform_device *pdev) goto probe_setup_failed; } + ret = devm_pm_runtime_enable(dev); + if (ret) + return ret; + + pm_runtime_set_autosuspend_delay(dev, CQSPI_AUTOSUSPEND_TIMEOUT); + pm_runtime_use_autosuspend(dev); + pm_runtime_get_noresume(dev); + ret = spi_register_controller(host); if (ret) { dev_err(&pdev->dev, "failed to register SPI ctlr %d\n", ret); goto probe_setup_failed; } + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + return 0; probe_setup_failed: cqspi_controller_enable(cqspi, 0); probe_reset_failed: clk_disable_unprepare(cqspi->clk); probe_clk_failed: - pm_runtime_put_sync(dev); -probe_pm_failed: - pm_runtime_disable(dev); return ret; } @@ -1928,7 +1951,8 @@ static int cqspi_resume(struct device *dev) return spi_controller_resume(host); } -static DEFINE_SIMPLE_DEV_PM_OPS(cqspi_dev_pm_ops, cqspi_suspend, cqspi_resume); +static DEFINE_RUNTIME_DEV_PM_OPS(cqspi_dev_pm_ops, cqspi_suspend, + cqspi_resume, NULL); static const struct cqspi_driver_platdata cdns_qspi = { .quirks = CQSPI_DISABLE_DAC_MODE, @@ -2012,7 +2036,7 @@ static struct platform_driver cqspi_platform_driver = { .remove_new = cqspi_remove, .driver = { .name = CQSPI_NAME, - .pm = &cqspi_dev_pm_ops, + .pm = pm_ptr(&cqspi_dev_pm_ops), .of_match_table = cqspi_dt_ids, }, }; |