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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-11-19 15:45:38 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-11-22 15:35:12 +0100 |
| commit | 7f5b61ab145725ef970c4b8b2d3ca47bb1fdc2f5 (patch) | |
| tree | 81918752c07b1048a71480ed42bc1698b494cf54 /drivers/i2c | |
| parent | 5525385c78fb8efbeeb9fc98a38680c84f4ba8a3 (diff) | |
| download | barebox-7f5b61ab145725ef970c4b8b2d3ca47bb1fdc2f5.tar.gz barebox-7f5b61ab145725ef970c4b8b2d3ca47bb1fdc2f5.tar.xz | |
i2c: omap: Add devicetree support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index c45af92ab3..f7108c2605 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -151,6 +151,7 @@ struct omap_i2c_struct { u8 reg_shift; struct omap_i2c_driver_data *data; struct resource *ioarea; + u32 fclk_rate; u32 speed; /* Speed of bus in Khz */ u16 scheme; u16 cmd_err; @@ -271,6 +272,11 @@ static struct omap_i2c_driver_data am33xx_data = { .fclk_rate = 48000, }; +static struct omap_i2c_driver_data omap4_of_data = { + .flags = OMAP_I2C_FLAG_BUS_SHIFT_NONE, + .fclk_rate = 0, +}; + static inline void omap_i2c_write_reg(struct omap_i2c_struct *i2c_omap, int reg, u16 val) { @@ -415,7 +421,7 @@ static int omap_i2c_init(struct omap_i2c_struct *i2c_omap) internal_clk = 4000; /* Compute prescaler divisor */ - psc = i2c_data->fclk_rate / internal_clk; + psc = i2c_omap->fclk_rate / internal_clk; psc = psc - 1; /* If configured for High Speed */ @@ -1074,6 +1080,12 @@ i2c_omap_probe(struct device_d *pdev) i2c_omap->b_hw = 1; /* Enable hardware fixes */ } + i2c_omap->fclk_rate = i2c_data->fclk_rate; + + if (!i2c_omap->fclk_rate) + of_property_read_u32(pdev->device_node, "clock-frequency", + &i2c_omap->fclk_rate); + /* reset ASAP, clearing any IRQs */ omap_i2c_init(i2c_omap); @@ -1085,6 +1097,7 @@ i2c_omap_probe(struct device_d *pdev) i2c_omap->adapter.master_xfer = omap_i2c_xfer, i2c_omap->adapter.nr = pdev->id; i2c_omap->adapter.dev.parent = pdev; + i2c_omap->adapter.dev.device_node = pdev->device_node; /* i2c device drivers may be active on return from add_adapter() */ r = i2c_add_numbered_adapter(&i2c_omap->adapter); @@ -1119,10 +1132,23 @@ static struct platform_device_id omap_i2c_ids[] = { }, }; +static __maybe_unused struct of_device_id omap_spi_dt_ids[] = { + { + .compatible = "ti,omap3-i2c", + .data = (unsigned long)&omap3_data, + }, { + .compatible = "ti,omap4-i2c", + .data = (unsigned long)&omap4_of_data, + }, { + /* sentinel */ + } +}; + static struct driver_d omap_i2c_driver = { .probe = i2c_omap_probe, .name = DRIVER_NAME, .id_table = omap_i2c_ids, + .of_compatible = DRV_OF_COMPAT(omap_spi_dt_ids), }; device_platform_driver(omap_i2c_driver); |