diff mbox series

[v2,net-next,2/6] ptp_pch: Use ioread64_lo_hi() / iowrite64_lo_hi()

Message ID 20220207210730.75252-2-andriy.shevchenko@linux.intel.com (mailing list archive)
State Accepted
Commit 8664d49a815e34f8e88489efb72c23826167adbe
Delegated to: Netdev Maintainers
Headers show
Series [v2,net-next,1/6] ptp_pch: use mac_pton() | expand

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Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter warning Series does not have a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 2 of 2 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 92 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Andy Shevchenko Feb. 7, 2022, 9:07 p.m. UTC 
There is already helper functions to do 64-bit I/O on 32-bit machines or
buses, thus we don't need to reinvent the wheel.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: no changes, but LKP may complain on parisc, fix had been sent
https://lore.kernel.org/linux-parisc/20220207151639.75086-1-andriy.shevchenko@linux.intel.com/t/#u

 drivers/ptp/ptp_pch.c | 46 ++++++++++---------------------------------
 1 file changed, 10 insertions(+), 36 deletions(-)
diff mbox series

Patch

diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c
index cbf7ce3db93a..f7b54256d94f 100644
--- a/drivers/ptp/ptp_pch.c
+++ b/drivers/ptp/ptp_pch.c
@@ -13,6 +13,7 @@ 
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -147,28 +148,15 @@  static inline void pch_eth_enable_set(struct pch_dev *chip)
 static u64 pch_systime_read(struct pch_ts_regs __iomem *regs)
 {
 	u64 ns;
-	u32 lo, hi;
 
-	lo = ioread32(&regs->systime_lo);
-	hi = ioread32(&regs->systime_hi);
+	ns = ioread64_lo_hi(&regs->systime_lo);
 
-	ns = ((u64) hi) << 32;
-	ns |= lo;
-	ns <<= TICKS_NS_SHIFT;
-
-	return ns;
+	return ns << TICKS_NS_SHIFT;
 }
 
 static void pch_systime_write(struct pch_ts_regs __iomem *regs, u64 ns)
 {
-	u32 hi, lo;
-
-	ns >>= TICKS_NS_SHIFT;
-	hi = ns >> 32;
-	lo = ns & 0xffffffff;
-
-	iowrite32(lo, &regs->systime_lo);
-	iowrite32(hi, &regs->systime_hi);
+	iowrite64_lo_hi(ns >> TICKS_NS_SHIFT, &regs->systime_lo);
 }
 
 static inline void pch_block_reset(struct pch_dev *chip)
@@ -234,16 +222,10 @@  u64 pch_rx_snap_read(struct pci_dev *pdev)
 {
 	struct pch_dev *chip = pci_get_drvdata(pdev);
 	u64 ns;
-	u32 lo, hi;
 
-	lo = ioread32(&chip->regs->rx_snap_lo);
-	hi = ioread32(&chip->regs->rx_snap_hi);
+	ns = ioread64_lo_hi(&chip->regs->rx_snap_lo);
 
-	ns = ((u64) hi) << 32;
-	ns |= lo;
-	ns <<= TICKS_NS_SHIFT;
-
-	return ns;
+	return ns << TICKS_NS_SHIFT;
 }
 EXPORT_SYMBOL(pch_rx_snap_read);
 
@@ -251,16 +233,10 @@  u64 pch_tx_snap_read(struct pci_dev *pdev)
 {
 	struct pch_dev *chip = pci_get_drvdata(pdev);
 	u64 ns;
-	u32 lo, hi;
-
-	lo = ioread32(&chip->regs->tx_snap_lo);
-	hi = ioread32(&chip->regs->tx_snap_hi);
 
-	ns = ((u64) hi) << 32;
-	ns |= lo;
-	ns <<= TICKS_NS_SHIFT;
+	ns = ioread64_lo_hi(&chip->regs->tx_snap_lo);
 
-	return ns;
+	return ns << TICKS_NS_SHIFT;
 }
 EXPORT_SYMBOL(pch_tx_snap_read);
 
@@ -309,8 +285,7 @@  int pch_set_station_address(u8 *addr, struct pci_dev *pdev)
 	}
 
 	dev_dbg(&pdev->dev, "invoking pch_station_set\n");
-	iowrite32(lower_32_bits(mac), &chip->regs->ts_st[0]);
-	iowrite32(upper_32_bits(mac), &chip->regs->ts_st[4]);
+	iowrite64_lo_hi(mac, &chip->regs->ts_st);
 	return 0;
 }
 EXPORT_SYMBOL(pch_set_station_address);
@@ -577,8 +552,7 @@  pch_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	pch_reset(chip);
 
 	iowrite32(DEFAULT_ADDEND, &chip->regs->addend);
-	iowrite32(1, &chip->regs->trgt_lo);
-	iowrite32(0, &chip->regs->trgt_hi);
+	iowrite64_lo_hi(1, &chip->regs->trgt_lo);
 	iowrite32(PCH_TSE_TTIPEND, &chip->regs->event);
 
 	pch_eth_enable_set(chip);