diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-16 13:31:47 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-09 19:34:14 +0400 |
| commit | 6ad1b614007c556129989b9f6b020d0d2e058121 (patch) | |
| tree | d146b694cad7d3134b3166f56f401b203e073811 | |
| parent | 710455201f6690841e9a40bedba09ddd0a7e0620 (diff) | |
| download | linux-6ad1b614007c556129989b9f6b020d0d2e058121.tar.xz | |
ARM: sa11x0: neponset: provide function to manipulate NCR_0
Rather than having direct register accesses to NCR_0 scattered amongst
the code, provide a function instead. This contains the necessary
race protection for this platform, ensuring that updates to this
register are safe.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-sa1100/include/mach/neponset.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-sa1100/neponset.c | 9 | ||||
| -rw-r--r-- | drivers/net/ethernet/smsc/smc91x.c | 2 | ||||
| -rw-r--r-- | drivers/pcmcia/sa1100_neponset.c | 7 |
4 files changed, 15 insertions, 7 deletions
diff --git a/arch/arm/mach-sa1100/include/mach/neponset.h b/arch/arm/mach-sa1100/include/mach/neponset.h index ffe2bc45eed0..6032216e1830 100644 --- a/arch/arm/mach-sa1100/include/mach/neponset.h +++ b/arch/arm/mach-sa1100/include/mach/neponset.h @@ -71,4 +71,8 @@ #define NCR_A0VPP (1<<5) #define NCR_A1VPP (1<<6) +void neponset_ncr_frob(unsigned int, unsigned int); +#define neponset_ncr_set(v) neponset_ncr_frob(0, v) +#define neponset_ncr_clear(v) neponset_ncr_frob(v, 0) + #endif diff --git a/arch/arm/mach-sa1100/neponset.c b/arch/arm/mach-sa1100/neponset.c index 6a14d3760ccd..10be07e2bd56 100644 --- a/arch/arm/mach-sa1100/neponset.c +++ b/arch/arm/mach-sa1100/neponset.c @@ -20,6 +20,15 @@ #include <asm/hardware/sa1111.h> #include <asm/sizes.h> +void neponset_ncr_frob(unsigned int mask, unsigned int val) +{ + unsigned long flags; + + local_irq_save(flags); + NCR_0 = (NCR_0 & ~mask) | val; + local_irq_restore(flags); +} + /* * Install handler for Neponset IRQ. Note that we have to loop here * since the ETHERNET and USAR IRQs are level based, and we need to diff --git a/drivers/net/ethernet/smsc/smc91x.c b/drivers/net/ethernet/smsc/smc91x.c index 64ad3ed74495..0dba0501b712 100644 --- a/drivers/net/ethernet/smsc/smc91x.c +++ b/drivers/net/ethernet/smsc/smc91x.c @@ -2281,7 +2281,7 @@ static int __devinit smc_drv_probe(struct platform_device *pdev) if (ret) goto out_release_io; #if defined(CONFIG_SA1100_ASSABET) - NCR_0 |= NCR_ENET_OSC_EN; + neponset_ncr_set(NCR_ENET_OSC_EN); #endif platform_set_drvdata(pdev, ndev); ret = smc_enable_device(pdev); diff --git a/drivers/pcmcia/sa1100_neponset.c b/drivers/pcmcia/sa1100_neponset.c index c95639b5f2a0..4300a7fb3edb 100644 --- a/drivers/pcmcia/sa1100_neponset.c +++ b/drivers/pcmcia/sa1100_neponset.c @@ -94,12 +94,7 @@ neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_sta ret = sa1111_pcmcia_configure_socket(skt, state); if (ret == 0) { - unsigned long flags; - - local_irq_save(flags); - NCR_0 = (NCR_0 & ~ncr_mask) | ncr_set; - - local_irq_restore(flags); + neponset_ncr_frob(ncr_mask, ncr_set); sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set); } |