Add support for suspend and resume to the Broadcom iProc mdio
mux driver.
Signed-off-by: Arun Parameswaran <arun.parameswaran@xxxxxxxxxxxx>
---
drivers/net/phy/mdio-mux-bcm-iproc.c | 42 ++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/net/phy/mdio-mux-bcm-iproc.c b/drivers/net/phy/mdio-mux-bcm-iproc.c
index 6b400dd..89c18d6 100644
--- a/drivers/net/phy/mdio-mux-bcm-iproc.c
+++ b/drivers/net/phy/mdio-mux-bcm-iproc.c
@@ -51,13 +51,25 @@
#define MDIO_OPERATING_FREQUENCY 11000000
#define MDIO_RATE_ADJ_DIVIDENT 1
+#define MDIO_NUM_OF_REGS_TO_RESTORE 2
+
struct iproc_mdiomux_desc {
void *mux_handle;
void __iomem *base;
struct device *dev;
struct mii_bus *mii_bus;
struct clk *core_clk;
+#ifdef CONFIG_PM_SLEEP
+ u32 restore_regs[MDIO_NUM_OF_REGS_TO_RESTORE];
+#endif
+};
+
+#ifdef CONFIG_PM_SLEEP
+static const u16 restore_reg_offsets[MDIO_NUM_OF_REGS_TO_RESTORE] = {
+ MDIO_RATE_ADJ_EXT_OFFSET,
+ MDIO_RATE_ADJ_INT_OFFSET,
};
+#endif
static void mdio_mux_iproc_config_clk(struct iproc_mdiomux_desc *md)
{
@@ -258,6 +270,35 @@ static int mdio_mux_iproc_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int mdio_mux_iproc_suspend(struct device *dev)
+{
+ int i;
+ struct iproc_mdiomux_desc *md = dev_get_drvdata(dev);
+
+ for (i = 0; i < MDIO_NUM_OF_REGS_TO_RESTORE; i++)
+ md->restore_regs[i] = readl(md->base +
+ restore_reg_offsets[i]);
+
+ return 0;
+}
+
+static int mdio_mux_iproc_resume(struct device *dev)
+{
+ int i;
+ struct iproc_mdiomux_desc *md = dev_get_drvdata(dev);
+
+ for (i = 0; i < MDIO_NUM_OF_REGS_TO_RESTORE; i++)
+ writel(md->restore_regs[i],
+ md->base + restore_reg_offsets[i]);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mdio_mux_iproc_pm_ops,
+ mdio_mux_iproc_suspend, mdio_mux_iproc_resume);
+
static const struct of_device_id mdio_mux_iproc_match[] = {
{
.compatible = "brcm,mdio-mux-iproc",
@@ -270,6 +311,7 @@ static int mdio_mux_iproc_remove(struct platform_device *pdev)
.driver = {
.name = "mdio-mux-iproc",
.of_match_table = mdio_mux_iproc_match,
+ .pm = &mdio_mux_iproc_pm_ops,
},
.probe = mdio_mux_iproc_probe,
.remove = mdio_mux_iproc_remove,
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
