diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-rk3x.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-rk3x.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c index 2bc8b01153d6..50702c7bb244 100644 --- a/drivers/i2c/busses/i2c-rk3x.c +++ b/drivers/i2c/busses/i2c-rk3x.c @@ -58,7 +58,7 @@ enum { #define REG_CON_LASTACK BIT(5) /* 1: send NACK after last received byte */ #define REG_CON_ACTACK BIT(6) /* 1: stop if NACK is received */ -#define REG_CON_TUNING_MASK GENMASK(15, 8) +#define REG_CON_TUNING_MASK GENMASK_ULL(15, 8) #define REG_CON_SDA_CFG(cfg) ((cfg) << 8) #define REG_CON_STA_CFG(cfg) ((cfg) << 12) @@ -742,7 +742,7 @@ static int rk3x_i2c_v1_calc_timings(unsigned long clk_rate, struct i2c_timings *t, struct rk3x_i2c_calced_timings *t_calc) { - unsigned long min_low_ns, min_high_ns, min_total_ns; + unsigned long min_low_ns, min_high_ns; unsigned long min_setup_start_ns, min_setup_data_ns; unsigned long min_setup_stop_ns, max_hold_data_ns; @@ -793,7 +793,6 @@ static int rk3x_i2c_v1_calc_timings(unsigned long clk_rate, /* These are the min dividers needed for min hold times. */ min_div_for_hold = (min_low_div + min_high_div); - min_total_ns = min_low_ns + min_high_ns; /* * This is the maximum divider so we don't go over the maximum. @@ -918,7 +917,7 @@ static void rk3x_i2c_adapt_div(struct rk3x_i2c *i2c, unsigned long clk_rate) * Code adapted from i2c-cadence.c. * * Return: NOTIFY_STOP if the rate change should be aborted, NOTIFY_OK - * to acknowedge the change, NOTIFY_DONE if the notification is + * to acknowledge the change, NOTIFY_DONE if the notification is * considered irrelevant. */ static int rk3x_i2c_clk_notifier_cb(struct notifier_block *nb, unsigned long @@ -1111,6 +1110,15 @@ static int rk3x_i2c_xfer(struct i2c_adapter *adap, return ret < 0 ? ret : num; } +static __maybe_unused int rk3x_i2c_resume(struct device *dev) +{ + struct rk3x_i2c *i2c = dev_get_drvdata(dev); + + rk3x_i2c_adapt_div(i2c, clk_get_rate(i2c->clk)); + + return 0; +} + static u32 rk3x_i2c_func(struct i2c_adapter *adap) { return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_PROTOCOL_MANGLING; @@ -1303,10 +1311,8 @@ static int rk3x_i2c_probe(struct platform_device *pdev) rk3x_i2c_adapt_div(i2c, clk_rate); ret = i2c_add_adapter(&i2c->adap); - if (ret < 0) { - dev_err(&pdev->dev, "Could not register adapter\n"); + if (ret < 0) goto err_clk_notifier; - } dev_info(&pdev->dev, "Initialized RK3xxx I2C bus at %p\n", i2c->regs); @@ -1334,12 +1340,15 @@ static int rk3x_i2c_remove(struct platform_device *pdev) return 0; } +static SIMPLE_DEV_PM_OPS(rk3x_i2c_pm_ops, NULL, rk3x_i2c_resume); + static struct platform_driver rk3x_i2c_driver = { .probe = rk3x_i2c_probe, .remove = rk3x_i2c_remove, .driver = { .name = "rk3x-i2c", .of_match_table = rk3x_i2c_match, + .pm = &rk3x_i2c_pm_ops, }, }; |