@@ -12,11 +12,14 @@
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
+#include <linux/pm_runtime.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/sizes.h>
#include <linux/types.h>
+#define INTEL_DG_SPI_RPM_TIMEOUT 500
+
struct intel_dg_spi {
struct kref refcnt;
struct mtd_info mtd;
@@ -471,6 +474,12 @@ static int intel_dg_spi_erase(struct mtd_info *mtd, struct erase_info *info)
total_len = info->len;
addr = info->addr;
+ ret = pm_runtime_resume_and_get(mtd->dev.parent);
+ if (ret < 0) {
+ dev_err(&mtd->dev, "rpm: get failed %d\n", ret);
+ return ret;
+ }
+
mutex_lock(&spi->lock);
while (total_len > 0) {
@@ -512,6 +521,8 @@ static int intel_dg_spi_erase(struct mtd_info *mtd, struct erase_info *info)
out:
mutex_unlock(&spi->lock);
+ pm_runtime_mark_last_busy(mtd->dev.parent);
+ pm_runtime_put_autosuspend(mtd->dev.parent);
return ret;
}
@@ -545,6 +556,12 @@ static int intel_dg_spi_read(struct mtd_info *mtd, loff_t from, size_t len,
if (len > spi->regions[idx].size - from)
len = spi->regions[idx].size - from;
+ ret = pm_runtime_resume_and_get(mtd->dev.parent);
+ if (ret < 0) {
+ dev_err(&mtd->dev, "rpm: get failed %zd\n", ret);
+ return ret;
+ }
+
mutex_lock(&spi->lock);
ret = spi_read(spi, region, from, len, buf);
@@ -557,6 +574,8 @@ static int intel_dg_spi_read(struct mtd_info *mtd, loff_t from, size_t len,
*retlen = ret;
mutex_unlock(&spi->lock);
+ pm_runtime_mark_last_busy(mtd->dev.parent);
+ pm_runtime_put_autosuspend(mtd->dev.parent);
return 0;
}
@@ -590,6 +609,12 @@ static int intel_dg_spi_write(struct mtd_info *mtd, loff_t to, size_t len,
if (len > spi->regions[idx].size - to)
len = spi->regions[idx].size - to;
+ ret = pm_runtime_resume_and_get(mtd->dev.parent);
+ if (ret < 0) {
+ dev_err(&mtd->dev, "rpm: get failed %zd\n", ret);
+ return ret;
+ }
+
mutex_lock(&spi->lock);
ret = spi_write(spi, region, to, len, buf);
@@ -602,6 +627,8 @@ static int intel_dg_spi_write(struct mtd_info *mtd, loff_t to, size_t len,
*retlen = ret;
mutex_unlock(&spi->lock);
+ pm_runtime_mark_last_busy(mtd->dev.parent);
+ pm_runtime_put_autosuspend(mtd->dev.parent);
return 0;
}
@@ -747,6 +774,17 @@ static int intel_dg_spi_probe(struct auxiliary_device *aux_dev,
}
}
+ pm_runtime_enable(device);
+
+ pm_runtime_set_autosuspend_delay(device, INTEL_DG_SPI_RPM_TIMEOUT);
+ pm_runtime_use_autosuspend(device);
+
+ ret = pm_runtime_resume_and_get(device);
+ if (ret < 0) {
+ dev_err(device, "rpm: get failed %d\n", ret);
+ goto err_norpm;
+ }
+
spi->base = devm_ioremap_resource(device, &ispi->bar);
if (IS_ERR(spi->base)) {
dev_err(device, "mmio not mapped\n");
@@ -769,9 +807,13 @@ static int intel_dg_spi_probe(struct auxiliary_device *aux_dev,
dev_set_drvdata(&aux_dev->dev, spi);
+ pm_runtime_put(device);
return 0;
err:
+ pm_runtime_put(device);
+err_norpm:
+ pm_runtime_disable(device);
kref_put(&spi->refcnt, intel_dg_spi_release);
return ret;
}
@@ -783,6 +825,8 @@ static void intel_dg_spi_remove(struct auxiliary_device *aux_dev)
if (!spi)
return;
+ pm_runtime_disable(&aux_dev->dev);
+
mtd_device_unregister(&spi->mtd);
dev_set_drvdata(&aux_dev->dev, NULL);
Enable runtime PM in spi driver to notify graphics driver that whole card should be kept awake while spi operations are performed through this driver. CC: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> --- drivers/spi/spi-intel-dg.c | 44 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+)