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phy: uniphier-usb3ss: fix unintended writing zeros to PHY register 

[ Upstream commit 898c7a9ec8 ]

Similar to commit 4a90bbb478 ("phy: uniphier-pcie: Fix updating phy
parameters"), in function uniphier_u3ssphy_set_param(), unintentionally
write zeros to other fields when writing PHY registers.

Fixes: 5ab43d0f86 ("phy: socionext: add USB3 PHY driver for UniPhier SoC")
Signed-off-by: Ryuta NAKANISHI <nakanishi.ryuta@socionext.com>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/1640150369-4134-1-git-send-email-hayashi.kunihiko@socionext.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ryuta NAKANISHI 2021-12-22 14:19:29 +09:00 committed by Greg Kroah-Hartman
parent af8cab36bf
commit 799b2c6cd7
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/phy/socionext/phy-uniphier-usb3ss.c
View File

@ -22,11 +22,13 @@
#include <linux/reset.h>
#define SSPHY_TESTI 0x0
#define SSPHY_TESTO 0x4
#define TESTI_DAT_MASK GENMASK(13, 6)
#define TESTI_ADR_MASK GENMASK(5, 1)
#define TESTI_WR_EN BIT(0)
#define SSPHY_TESTO 0x4
#define TESTO_DAT_MASK GENMASK(7, 0)
#define PHY_F(regno, msb, lsb) { (regno), (msb), (lsb) }
#define CDR_CPD_TRIM PHY_F(7, 3, 0) /* RxPLL charge pump current */
@ -84,12 +86,12 @@ static void uniphier_u3ssphy_set_param(struct uniphier_u3ssphy_priv *priv,
val = FIELD_PREP(TESTI_DAT_MASK, 1);
val |= FIELD_PREP(TESTI_ADR_MASK, p->field.reg_no);
uniphier_u3ssphy_testio_write(priv, val);
val = readl(priv->base + SSPHY_TESTO);
val = readl(priv->base + SSPHY_TESTO) & TESTO_DAT_MASK;
/* update value */
val &= ~FIELD_PREP(TESTI_DAT_MASK, field_mask);
val &= ~field_mask;
data = field_mask & (p->value << p->field.lsb);
val = FIELD_PREP(TESTI_DAT_MASK, data);
val = FIELD_PREP(TESTI_DAT_MASK, data | val);
val |= FIELD_PREP(TESTI_ADR_MASK, p->field.reg_no);
uniphier_u3ssphy_testio_write(priv, val);
uniphier_u3ssphy_testio_write(priv, val | TESTI_WR_EN);