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media: i2c: ds90ub953: Support non-sync mode

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Add support for FPD-Link non-sync mode with external clock. The only
thing that needs to be added is the calculation for the clkout.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Tomi Valkeinen 2023-07-31 16:24:42 +03:00 committed by Mauro Carvalho Chehab
parent d7d7a9ab7a
commit 618aba51c2
1 changed files with 28 additions and 8 deletions
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36
drivers/media/i2c/ds90ub953.c
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@ -145,6 +145,7 @@ struct ub953_data {
struct i2c_client *client;
struct regmap *regmap;
struct clk *clkin;
u32 num_data_lanes;
bool non_continous_clk;
@ -844,15 +845,21 @@ static int ub953_i2c_master_init(struct ub953_data *priv)
static u64 ub953_get_fc_rate(struct ub953_data *priv)
{
if (priv->mode != UB953_MODE_SYNC) {
switch (priv->mode) {
case UB953_MODE_SYNC:
if (priv->hw_data->is_ub971)
return priv->plat_data->bc_rate * 160ull;
else
return priv->plat_data->bc_rate / 2 * 160ull;
case UB953_MODE_NONSYNC_EXT:
/* CLKIN_DIV = 1 always */
return clk_get_rate(priv->clkin) * 80ull;
default:
/* Not supported */
return 0;
}
if (priv->hw_data->is_ub971)
return priv->plat_data->bc_rate * 160ull;
else
return priv->plat_data->bc_rate / 2 * 160ull;
}
static unsigned long ub953_calc_clkout_ub953(struct ub953_data *priv,
@ -1195,9 +1202,15 @@ static int ub953_hw_init(struct ub953_data *priv)
dev_dbg(dev, "mode from %s: %#x\n", mode_override ? "reg" : "strap",
priv->mode);
if (priv->mode != UB953_MODE_SYNC)
if (priv->mode != UB953_MODE_SYNC &&
priv->mode != UB953_MODE_NONSYNC_EXT)
return dev_err_probe(dev, -ENODEV,
"Only synchronous mode supported\n");
"Unsupported mode selected: %u\n",
priv->mode);
if (priv->mode == UB953_MODE_NONSYNC_EXT && !priv->clkin)
return dev_err_probe(dev, -EINVAL,
"clkin required for non-sync ext mode\n");
ret = ub953_read(priv, UB953_REG_REV_MASK_ID, &v);
if (ret)
@ -1314,6 +1327,13 @@ static int ub953_probe(struct i2c_client *client)
goto err_mutex_destroy;
}
priv->clkin = devm_clk_get_optional(dev, "clkin");
if (IS_ERR(priv->clkin)) {
ret = PTR_ERR(priv->clkin);
dev_err_probe(dev, ret, "failed to parse 'clkin'\n");
goto err_mutex_destroy;
}
ret = ub953_parse_dt(priv);
if (ret)
goto err_mutex_destroy;