diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-ocores.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index b32d67c90d67..0d90a82a2c03 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -34,6 +34,7 @@ */ struct ocores_i2c { void __iomem *base; + int iobase; u32 reg_shift; u32 reg_io_width; unsigned long flags; @@ -135,6 +136,16 @@ static inline u8 oc_getreg_32be(struct ocores_i2c *i2c, int reg) return ioread32be(i2c->base + (reg << i2c->reg_shift)); } +static void oc_setreg_io_8(struct ocores_i2c *i2c, int reg, u8 value) +{ + outb(value, i2c->iobase + reg); +} + +static inline u8 oc_getreg_io_8(struct ocores_i2c *i2c, int reg) +{ + return inb(i2c->iobase + reg); +} + static inline void oc_setreg(struct ocores_i2c *i2c, int reg, u8 value) { i2c->setreg(i2c, reg, value); @@ -593,9 +604,24 @@ static int ocores_i2c_probe(struct platform_device *pdev) spin_lock_init(&i2c->process_lock); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - i2c->base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(i2c->base)) - return PTR_ERR(i2c->base); + if (res) { + i2c->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(i2c->base)) + return PTR_ERR(i2c->base); + } else { + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!res) + return -EINVAL; + i2c->iobase = res->start; + if (!devm_request_region(&pdev->dev, res->start, + resource_size(res), + pdev->name)) { + dev_err(&pdev->dev, "Can't get I/O resource.\n"); + return -EBUSY; + } + i2c->setreg = oc_setreg_io_8; + i2c->getreg = oc_getreg_io_8; + } pdata = dev_get_platdata(&pdev->dev); if (pdata) { |