The era of hand-rolled HIWORD_UPDATE macros is over, at least for those
drivers that use constant masks.
Remove this driver's HIWORD_UPDATE macro, and replace all instances of
it with (hopefully) equivalent FIELD_PREP_WM16 instances. To do this, a
few of the defines are being adjusted, as FIELD_PREP_WM16 shifts up the
value for us. This gets rid of the icky update(mask, mask) shenanigans.
The benefit of using FIELD_PREP_WM16 is that it does more checking of
the input, hopefully catching errors. In practice, a shared definition
makes code more readable than several different flavours of the same
macro, and the shifted value helps as well.
I do not have the hardware that uses this particular driver, so it's
compile-tested only as far as my own testing goes.
Signed-off-by: Nicolas Frattaroli <nicolas.frattar...@collabora.com>
---
drivers/phy/rockchip/phy-rockchip-usb.c | 51 +++++++++++++--------------------
1 file changed, 20 insertions(+), 31 deletions(-)
diff --git a/drivers/phy/rockchip/phy-rockchip-usb.c
b/drivers/phy/rockchip/phy-rockchip-usb.c
index
666a896c8f0a08443228914a039b95974e15ba58..c3c30df29c3ea1a25f7b6100afac36506ec83601
100644
--- a/drivers/phy/rockchip/phy-rockchip-usb.c
+++ b/drivers/phy/rockchip/phy-rockchip-usb.c
@@ -8,6 +8,7 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/hw_bitfield.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -24,9 +25,6 @@
static int enable_usb_uart;
-#define HIWORD_UPDATE(val, mask) \
- ((val) | (mask) << 16)
-
#define UOC_CON0 0x00
#define UOC_CON0_SIDDQ BIT(13)
#define UOC_CON0_DISABLE BIT(4)
@@ -38,10 +36,10 @@ static int enable_usb_uart;
#define UOC_CON3 0x0c
/* bits present on rk3188 and rk3288 phys */
#define UOC_CON3_UTMI_TERMSEL_FULLSPEED BIT(5)
-#define UOC_CON3_UTMI_XCVRSEELCT_FSTRANSC (1 << 3)
-#define UOC_CON3_UTMI_XCVRSEELCT_MASK (3 << 3)
-#define UOC_CON3_UTMI_OPMODE_NODRIVING (1 << 1)
-#define UOC_CON3_UTMI_OPMODE_MASK (3 << 1)
+#define UOC_CON3_UTMI_XCVRSEELCT_FSTRANSC 1UL
+#define UOC_CON3_UTMI_XCVRSEELCT_MASK GENMASK(4, 3)
+#define UOC_CON3_UTMI_OPMODE_NODRIVING 1UL
+#define UOC_CON3_UTMI_OPMODE_MASK GENMASK(2, 1)
#define UOC_CON3_UTMI_SUSPENDN BIT(0)
struct rockchip_usb_phys {
@@ -79,7 +77,7 @@ struct rockchip_usb_phy {
static int rockchip_usb_phy_power(struct rockchip_usb_phy *phy,
bool siddq)
{
- u32 val = HIWORD_UPDATE(siddq ? UOC_CON0_SIDDQ : 0, UOC_CON0_SIDDQ);
+ u32 val = FIELD_PREP_WM16(UOC_CON0_SIDDQ, siddq);
return regmap_write(phy->base->reg_base, phy->reg_offset, val);
}
@@ -332,29 +330,24 @@ static int __init rockchip_init_usb_uart_common(struct
regmap *grf,
* but were not present in the original code.
* Also disable the analog phy components to save power.
*/
- val = HIWORD_UPDATE(UOC_CON0_COMMON_ON_N
- | UOC_CON0_DISABLE
- | UOC_CON0_SIDDQ,
- UOC_CON0_COMMON_ON_N
- | UOC_CON0_DISABLE
- | UOC_CON0_SIDDQ);
+ val = FIELD_PREP_WM16(UOC_CON0_COMMON_ON_N, 1) |
+ FIELD_PREP_WM16(UOC_CON0_DISABLE, 1) |
+ FIELD_PREP_WM16(UOC_CON0_SIDDQ, 1);
ret = regmap_write(grf, regoffs + UOC_CON0, val);
if (ret)
return ret;
- val = HIWORD_UPDATE(UOC_CON2_SOFT_CON_SEL,
- UOC_CON2_SOFT_CON_SEL);
+ val = FIELD_PREP_WM16(UOC_CON2_SOFT_CON_SEL, 1);
ret = regmap_write(grf, regoffs + UOC_CON2, val);
if (ret)
return ret;
- val = HIWORD_UPDATE(UOC_CON3_UTMI_OPMODE_NODRIVING
- | UOC_CON3_UTMI_XCVRSEELCT_FSTRANSC
- | UOC_CON3_UTMI_TERMSEL_FULLSPEED,
- UOC_CON3_UTMI_SUSPENDN
- | UOC_CON3_UTMI_OPMODE_MASK
- | UOC_CON3_UTMI_XCVRSEELCT_MASK
- | UOC_CON3_UTMI_TERMSEL_FULLSPEED);
+ val = FIELD_PREP_WM16(UOC_CON3_UTMI_SUSPENDN, 0) |
+ FIELD_PREP_WM16(UOC_CON3_UTMI_OPMODE_MASK,
+ UOC_CON3_UTMI_OPMODE_NODRIVING) |
+ FIELD_PREP_WM16(UOC_CON3_UTMI_XCVRSEELCT_MASK,
+ UOC_CON3_UTMI_XCVRSEELCT_FSTRANSC) |
+ FIELD_PREP_WM16(UOC_CON3_UTMI_TERMSEL_FULLSPEED, 1);
ret = regmap_write(grf, UOC_CON3, val);
if (ret)
return ret;
@@ -380,10 +373,8 @@ static int __init rk3188_init_usb_uart(struct regmap *grf,
if (ret)
return ret;
- val = HIWORD_UPDATE(RK3188_UOC0_CON0_BYPASSSEL
- | RK3188_UOC0_CON0_BYPASSDMEN,
- RK3188_UOC0_CON0_BYPASSSEL
- | RK3188_UOC0_CON0_BYPASSDMEN);
+ val = FIELD_PREP_WM16(RK3188_UOC0_CON0_BYPASSSEL, 1) |
+ FIELD_PREP_WM16(RK3188_UOC0_CON0_BYPASSDMEN, 1);
ret = regmap_write(grf, RK3188_UOC0_CON0, val);
if (ret)
return ret;
@@ -430,10 +421,8 @@ static int __init rk3288_init_usb_uart(struct regmap *grf,
if (ret)
return ret;
- val = HIWORD_UPDATE(RK3288_UOC0_CON3_BYPASSSEL
- | RK3288_UOC0_CON3_BYPASSDMEN,
- RK3288_UOC0_CON3_BYPASSSEL
- | RK3288_UOC0_CON3_BYPASSDMEN);
+ val = FIELD_PREP_WM16(RK3288_UOC0_CON3_BYPASSSEL, 1) |
+ FIELD_PREP_WM16(RK3288_UOC0_CON3_BYPASSDMEN, 1);
ret = regmap_write(grf, RK3288_UOC0_CON3, val);
if (ret)
return ret;
--
2.50.0
