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Diffstat (limited to 'drivers/i2c/busses/i2c-nomadik.c')
-rw-r--r--drivers/i2c/busses/i2c-nomadik.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 5e6f1eed4f83..61b00edacb08 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -350,10 +350,6 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
350 350
351 i2c_clk = clk_get_rate(dev->clk); 351 i2c_clk = clk_get_rate(dev->clk);
352 352
353 /* fallback to std. mode if machine has not provided it */
354 if (dev->cfg.clk_freq == 0)
355 dev->cfg.clk_freq = 100000;
356
357 /* 353 /*
358 * The spec says, in case of std. mode the divider is 354 * The spec says, in case of std. mode the divider is
359 * 2 whereas it is 3 for fast and fastplus mode of 355 * 2 whereas it is 3 for fast and fastplus mode of
@@ -911,20 +907,32 @@ static const struct i2c_algorithm nmk_i2c_algo = {
911 .functionality = nmk_i2c_functionality 907 .functionality = nmk_i2c_functionality
912}; 908};
913 909
910static struct nmk_i2c_controller u8500_i2c = {
911 /*
912 * Slave data setup time; 250ns, 100ns, and 10ns, which
913 * is 14, 6 and 2 respectively for a 48Mhz i2c clock.
914 */
915 .slsu = 0xe,
916 .tft = 1, /* Tx FIFO threshold */
917 .rft = 8, /* Rx FIFO threshold */
918 .clk_freq = 400000, /* fast mode operation */
919 .timeout = 200, /* Slave response timeout(ms) */
920 .sm = I2C_FREQ_MODE_FAST,
921};
922
914static atomic_t adapter_id = ATOMIC_INIT(0); 923static atomic_t adapter_id = ATOMIC_INIT(0);
915 924
916static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) 925static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
917{ 926{
918 int ret = 0; 927 int ret = 0;
919 struct nmk_i2c_controller *pdata = 928 struct nmk_i2c_controller *pdata = adev->dev.platform_data;
920 adev->dev.platform_data;
921 struct nmk_i2c_dev *dev; 929 struct nmk_i2c_dev *dev;
922 struct i2c_adapter *adap; 930 struct i2c_adapter *adap;
923 931
924 if (!pdata) { 932 if (!pdata)
925 dev_warn(&adev->dev, "no platform data\n"); 933 /* No i2c configuration found, using the default. */
926 return -ENODEV; 934 pdata = &u8500_i2c;
927 } 935
928 dev = kzalloc(sizeof(struct nmk_i2c_dev), GFP_KERNEL); 936 dev = kzalloc(sizeof(struct nmk_i2c_dev), GFP_KERNEL);
929 if (!dev) { 937 if (!dev) {
930 dev_err(&adev->dev, "cannot allocate memory\n"); 938 dev_err(&adev->dev, "cannot allocate memory\n");