i2c: omap: Add devicetree support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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5525385c78
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7f5b61ab14
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@ -151,6 +151,7 @@ struct omap_i2c_struct {
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u8 reg_shift;
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u8 reg_shift;
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struct omap_i2c_driver_data *data;
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struct omap_i2c_driver_data *data;
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struct resource *ioarea;
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struct resource *ioarea;
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u32 fclk_rate;
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u32 speed; /* Speed of bus in Khz */
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u32 speed; /* Speed of bus in Khz */
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u16 scheme;
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u16 scheme;
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u16 cmd_err;
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u16 cmd_err;
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@ -271,6 +272,11 @@ static struct omap_i2c_driver_data am33xx_data = {
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.fclk_rate = 48000,
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.fclk_rate = 48000,
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};
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};
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static struct omap_i2c_driver_data omap4_of_data = {
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.flags = OMAP_I2C_FLAG_BUS_SHIFT_NONE,
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.fclk_rate = 0,
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};
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static inline void omap_i2c_write_reg(struct omap_i2c_struct *i2c_omap,
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static inline void omap_i2c_write_reg(struct omap_i2c_struct *i2c_omap,
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int reg, u16 val)
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int reg, u16 val)
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{
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{
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@ -415,7 +421,7 @@ static int omap_i2c_init(struct omap_i2c_struct *i2c_omap)
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internal_clk = 4000;
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internal_clk = 4000;
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/* Compute prescaler divisor */
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/* Compute prescaler divisor */
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psc = i2c_data->fclk_rate / internal_clk;
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psc = i2c_omap->fclk_rate / internal_clk;
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psc = psc - 1;
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psc = psc - 1;
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/* If configured for High Speed */
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/* If configured for High Speed */
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@ -1074,6 +1080,12 @@ i2c_omap_probe(struct device_d *pdev)
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i2c_omap->b_hw = 1; /* Enable hardware fixes */
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i2c_omap->b_hw = 1; /* Enable hardware fixes */
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}
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}
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i2c_omap->fclk_rate = i2c_data->fclk_rate;
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if (!i2c_omap->fclk_rate)
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of_property_read_u32(pdev->device_node, "clock-frequency",
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&i2c_omap->fclk_rate);
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/* reset ASAP, clearing any IRQs */
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/* reset ASAP, clearing any IRQs */
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omap_i2c_init(i2c_omap);
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omap_i2c_init(i2c_omap);
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@ -1085,6 +1097,7 @@ i2c_omap_probe(struct device_d *pdev)
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i2c_omap->adapter.master_xfer = omap_i2c_xfer,
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i2c_omap->adapter.master_xfer = omap_i2c_xfer,
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i2c_omap->adapter.nr = pdev->id;
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i2c_omap->adapter.nr = pdev->id;
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i2c_omap->adapter.dev.parent = pdev;
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i2c_omap->adapter.dev.parent = pdev;
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i2c_omap->adapter.dev.device_node = pdev->device_node;
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/* i2c device drivers may be active on return from add_adapter() */
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/* i2c device drivers may be active on return from add_adapter() */
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r = i2c_add_numbered_adapter(&i2c_omap->adapter);
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r = i2c_add_numbered_adapter(&i2c_omap->adapter);
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@ -1119,10 +1132,23 @@ static struct platform_device_id omap_i2c_ids[] = {
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},
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},
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};
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};
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static __maybe_unused struct of_device_id omap_spi_dt_ids[] = {
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{
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.compatible = "ti,omap3-i2c",
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.data = (unsigned long)&omap3_data,
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}, {
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.compatible = "ti,omap4-i2c",
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.data = (unsigned long)&omap4_of_data,
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}, {
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/* sentinel */
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}
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};
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static struct driver_d omap_i2c_driver = {
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static struct driver_d omap_i2c_driver = {
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.probe = i2c_omap_probe,
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.probe = i2c_omap_probe,
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.name = DRIVER_NAME,
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.name = DRIVER_NAME,
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.id_table = omap_i2c_ids,
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.id_table = omap_i2c_ids,
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.of_compatible = DRV_OF_COMPAT(omap_spi_dt_ids),
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};
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};
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device_platform_driver(omap_i2c_driver);
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device_platform_driver(omap_i2c_driver);
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