diff options
Diffstat (limited to 'drivers/mtd/spi-nor/cadence-quadspi.c')
| -rw-r--r-- | drivers/mtd/spi-nor/cadence-quadspi.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c index 67ade2c81b21..67f15a1f16fd 100644 --- a/drivers/mtd/spi-nor/cadence-quadspi.c +++ b/drivers/mtd/spi-nor/cadence-quadspi.c @@ -23,6 +23,7 @@ #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> +#include <linux/reset.h> #include <linux/sched.h> #include <linux/spi/spi.h> #include <linux/timer.h> @@ -1325,6 +1326,7 @@ static int cqspi_probe(struct platform_device *pdev) struct cqspi_st *cqspi; struct resource *res; struct resource *res_ahb; + struct reset_control *rstc, *rstc_ocp; const struct cqspi_driver_platdata *ddata; int ret; int irq; @@ -1391,6 +1393,25 @@ static int cqspi_probe(struct platform_device *pdev) goto probe_clk_failed; } + /* Obtain QSPI reset control */ + rstc = devm_reset_control_get_optional_exclusive(dev, "qspi"); + if (IS_ERR(rstc)) { + dev_err(dev, "Cannot get QSPI reset.\n"); + return PTR_ERR(rstc); + } + + rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp"); + if (IS_ERR(rstc_ocp)) { + dev_err(dev, "Cannot get QSPI OCP reset.\n"); + return PTR_ERR(rstc_ocp); + } + + reset_control_assert(rstc); + reset_control_deassert(rstc); + + reset_control_assert(rstc_ocp); + reset_control_deassert(rstc_ocp); + cqspi->master_ref_clk_hz = clk_get_rate(cqspi->clk); ddata = of_device_get_match_data(dev); if (ddata && (ddata->quirks & CQSPI_NEEDS_WR_DELAY)) |