[PATCH/RFC 13/17] pinctl: ti: iodelay: Use bitfield helpers

[Geert Uytterhoeven <geert+renesas@glider.be>]

Use the field_{get,prep}() helpers, instead of defining a custom
function, or open-coding the same operations.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
Compile-tested only.
Marked RFC, as this depends on [PATCH 01/17], but follows a different
path to upstream.
---
 drivers/pinctrl/ti/pinctrl-ti-iodelay.c | 35 +++++++------------------
 1 file changed, 10 insertions(+), 25 deletions(-)

diff --git a/drivers/pinctrl/ti/pinctrl-ti-iodelay.c b/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
index 4e2382778d38f557..b220dcd9215520db 100644
--- a/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
+++ b/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
@@ -9,6 +9,7 @@
  * warranty of any kind, whether express or implied.
  */
 
+#include <linux/bitfield.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
@@ -155,18 +156,6 @@ struct ti_iodelay_device {
 	struct ti_iodelay_reg_values reg_init_conf_values;
 };
 
-/**
- * ti_iodelay_extract() - extract bits for a field
- * @val: Register value
- * @mask: Mask
- *
- * Return: extracted value which is appropriately shifted
- */
-static inline u32 ti_iodelay_extract(u32 val, u32 mask)
-{
-	return (val & mask) >> __ffs(mask);
-}
-
 /**
  * ti_iodelay_compute_dpe() - Compute equation for delay parameter
  * @period: Period to use
@@ -233,10 +222,10 @@ static int ti_iodelay_pinconf_set(struct ti_iodelay_device *iod,
 	}
 
 	reg_mask = reg->signature_mask;
-	reg_val = reg->signature_value << __ffs(reg->signature_mask);
+	reg_val = field_prep(reg->signature_mask, reg->signature_value);
 
 	reg_mask |= reg->binary_data_coarse_mask;
-	tmp_val = c_elements << __ffs(reg->binary_data_coarse_mask);
+	tmp_val = field_prep(reg->binary_data_coarse_mask, c_elements);
 	if (tmp_val & ~reg->binary_data_coarse_mask) {
 		dev_err(dev, "Masking overflow of coarse elements %08x\n",
 			tmp_val);
@@ -245,7 +234,7 @@ static int ti_iodelay_pinconf_set(struct ti_iodelay_device *iod,
 	reg_val |= tmp_val;
 
 	reg_mask |= reg->binary_data_fine_mask;
-	tmp_val = f_elements << __ffs(reg->binary_data_fine_mask);
+	tmp_val = field_prep(reg->binary_data_fine_mask, f_elements);
 	if (tmp_val & ~reg->binary_data_fine_mask) {
 		dev_err(dev, "Masking overflow of fine elements %08x\n",
 			tmp_val);
@@ -260,7 +249,7 @@ static int ti_iodelay_pinconf_set(struct ti_iodelay_device *iod,
 	 * impacting iodelay configuration. Use with care!
 	 */
 	reg_mask |= reg->lock_mask;
-	reg_val |= reg->unlock_val << __ffs(reg->lock_mask);
+	reg_val |= field_prep(reg->lock_mask, reg->unlock_val);
 	r = regmap_update_bits(iod->regmap, cfg->offset, reg_mask, reg_val);
 
 	dev_dbg(dev, "Set reg 0x%x Delay(a: %d g: %d), Elements(C=%d F=%d)0x%x\n",
@@ -296,16 +285,14 @@ static int ti_iodelay_pinconf_init_dev(struct ti_iodelay_device *iod)
 	r = regmap_read(iod->regmap, reg->reg_refclk_offset, &val);
 	if (r)
 		return r;
-	ival->ref_clk_period = ti_iodelay_extract(val, reg->refclk_period_mask);
+	ival->ref_clk_period = field_get(reg->refclk_period_mask, val);
 	dev_dbg(dev, "refclk_period=0x%04x\n", ival->ref_clk_period);
 
 	r = regmap_read(iod->regmap, reg->reg_coarse_offset, &val);
 	if (r)
 		return r;
-	ival->coarse_ref_count =
-	    ti_iodelay_extract(val, reg->coarse_ref_count_mask);
-	ival->coarse_delay_count =
-	    ti_iodelay_extract(val, reg->coarse_delay_count_mask);
+	ival->coarse_ref_count = field_get(reg->coarse_ref_count_mask, val);
+	ival->coarse_delay_count = field_get(reg->coarse_delay_count_mask, val);
 	if (!ival->coarse_delay_count) {
 		dev_err(dev, "Invalid Coarse delay count (0) (reg=0x%08x)\n",
 			val);
@@ -326,10 +313,8 @@ static int ti_iodelay_pinconf_init_dev(struct ti_iodelay_device *iod)
 	r = regmap_read(iod->regmap, reg->reg_fine_offset, &val);
 	if (r)
 		return r;
-	ival->fine_ref_count =
-	    ti_iodelay_extract(val, reg->fine_ref_count_mask);
-	ival->fine_delay_count =
-	    ti_iodelay_extract(val, reg->fine_delay_count_mask);
+	ival->fine_ref_count = field_get(reg->fine_ref_count_mask, val);
+	ival->fine_delay_count = field_get(reg->fine_delay_count_mask, val);
 	if (!ival->fine_delay_count) {
 		dev_err(dev, "Invalid Fine delay count (0) (reg=0x%08x)\n",
 			val);
-- 
2.25.1