It would be nice to replace the PCIe link-up loop as well but
there are too many uses of this that do not poll (and the
read_poll_timeout uses "timeout==0" to loop forever).
Signed-off-by: Jim Quinlan <jim2101024@xxxxxxxxx>
---
drivers/pci/controller/pcie-brcmstb.c | 27 ++++++++++-----------------
1 file changed, 10 insertions(+), 17 deletions(-)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 39b545713ba0..c7210cec1f58 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -9,6 +9,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/ioport.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
@@ -302,42 +303,34 @@ static u32 brcm_pcie_mdio_form_pkt(int port, int regad, int cmd)
/* negative return value indicates error */
static int brcm_pcie_mdio_read(void __iomem *base, u8 port, u8 regad, u32 *val)
{
- int tries;
u32 data;
+ int err;
writel(brcm_pcie_mdio_form_pkt(port, regad, MDIO_CMD_READ),
base + PCIE_RC_DL_MDIO_ADDR);
readl(base + PCIE_RC_DL_MDIO_ADDR);
-
- data = readl(base + PCIE_RC_DL_MDIO_RD_DATA);
- for (tries = 0; !MDIO_RD_DONE(data) && tries < 10; tries++) {
- udelay(10);
- data = readl(base + PCIE_RC_DL_MDIO_RD_DATA);
- }
-
+ err = readl_poll_timeout_atomic(base + PCIE_RC_DL_MDIO_RD_DATA, data,
+ MDIO_RD_DONE(data), 10, 100);
*val = FIELD_GET(MDIO_DATA_MASK, data);
- return MDIO_RD_DONE(data) ? 0 : -EIO;
+
+ return err;
}
/* negative return value indicates error */
static int brcm_pcie_mdio_write(void __iomem *base, u8 port,
u8 regad, u16 wrdata)
{
- int tries;
u32 data;
+ int err;
writel(brcm_pcie_mdio_form_pkt(port, regad, MDIO_CMD_WRITE),
base + PCIE_RC_DL_MDIO_ADDR);
readl(base + PCIE_RC_DL_MDIO_ADDR);
writel(MDIO_DATA_DONE_MASK | wrdata, base + PCIE_RC_DL_MDIO_WR_DATA);
- data = readl(base + PCIE_RC_DL_MDIO_WR_DATA);
- for (tries = 0; !MDIO_WT_DONE(data) && tries < 10; tries++) {
- udelay(10);
- data = readl(base + PCIE_RC_DL_MDIO_WR_DATA);
- }
-
- return MDIO_WT_DONE(data) ? 0 : -EIO;
+ err = readw_poll_timeout_atomic(base + PCIE_RC_DL_MDIO_WR_DATA, data,
+ MDIO_WT_DONE(data), 10, 100);
+ return err;
}
/*
--
2.17.1
