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author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2022-02-07 23:07:26 +0200 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-08 21:04:31 -0800 |
commit | 8664d49a815e34f8e88489efb72c23826167adbe (patch) | |
tree | c605ffab915b5857a85f115d9bcae6ab5c1d36dd /drivers/ptp/ptp_pch.c | |
parent | 4e76b5c11d25119b16757f14a0a88415fd285df7 (diff) | |
download | linux-8664d49a815e34f8e88489efb72c23826167adbe.tar.gz linux-8664d49a815e34f8e88489efb72c23826167adbe.tar.bz2 linux-8664d49a815e34f8e88489efb72c23826167adbe.zip |
ptp_pch: Use ioread64_lo_hi() / iowrite64_lo_hi()
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>
Link: https://lore.kernel.org/r/20220207210730.75252-2-andriy.shevchenko@linux.intel.com
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/ptp/ptp_pch.c')
-rw-r--r-- | drivers/ptp/ptp_pch.c | 46 |
1 files changed, 10 insertions, 36 deletions
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(®s->systime_lo); - hi = ioread32(®s->systime_hi); + ns = ioread64_lo_hi(®s->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, ®s->systime_lo); - iowrite32(hi, ®s->systime_hi); + iowrite64_lo_hi(ns >> TICKS_NS_SHIFT, ®s->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); |