[PATCH v3 04/16] phy: qcom-qmp-usb: make QPHY_PCS_MISC_CLAMP_ENABLE access conditional

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

The register QPHY_V[34]_PCS_MISC_CLAMP_ENABLE is present only on some
SoC families. Other platforms (qcm2290) can have PCS_MISC region, but do
not have this register. Add it to the register layout table and check
that it is defined before toggling CLAMP settings.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
index 8f43de20fb8c..411cf0ae148d 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
@@ -94,6 +94,7 @@ enum qphy_reg_layout {
 	QPHY_PCS_AUTONOMOUS_MODE_CTRL,
 	QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR,
 	QPHY_PCS_POWER_DOWN_CONTROL,
+	QPHY_PCS_MISC_CLAMP_ENABLE,
 	/* Keep last to ensure regs_layout arrays are properly initialized */
 	QPHY_LAYOUT_SIZE
 };
@@ -114,6 +115,16 @@ static const unsigned int qmp_v3_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= QPHY_V3_PCS_AUTONOMOUS_MODE_CTRL,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR] = QPHY_V3_PCS_LFPS_RXTERM_IRQ_CLEAR,
 	[QPHY_PCS_POWER_DOWN_CONTROL]	= QPHY_V3_PCS_POWER_DOWN_CONTROL,
+	[QPHY_PCS_MISC_CLAMP_ENABLE]	= QPHY_V3_PCS_MISC_CLAMP_ENABLE,
+};
+
+static const unsigned int qmp_v3_usb3phy_regs_layout_qcm2290[QPHY_LAYOUT_SIZE] = {
+	[QPHY_SW_RESET]			= QPHY_V3_PCS_SW_RESET,
+	[QPHY_START_CTRL]		= QPHY_V3_PCS_START_CONTROL,
+	[QPHY_PCS_STATUS]		= QPHY_V3_PCS_PCS_STATUS,
+	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= QPHY_V3_PCS_AUTONOMOUS_MODE_CTRL,
+	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR] = QPHY_V3_PCS_LFPS_RXTERM_IRQ_CLEAR,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= QPHY_V3_PCS_POWER_DOWN_CONTROL,
 };
 
 static const unsigned int qmp_v4_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
@@ -125,6 +136,7 @@ static const unsigned int qmp_v4_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	/* In PCS_USB */
 	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= QPHY_V4_PCS_USB3_AUTONOMOUS_MODE_CTRL,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR] = QPHY_V4_PCS_USB3_LFPS_RXTERM_IRQ_CLEAR,
+	[QPHY_PCS_MISC_CLAMP_ENABLE]	= QPHY_V4_PCS_MISC_CLAMP_ENABLE,
 };
 
 static const unsigned int qmp_v5_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
@@ -1523,7 +1535,7 @@ static const struct qmp_phy_cfg qcm2290_usb3phy_cfg = {
 	.pcs_tbl_num		= ARRAY_SIZE(qcm2290_usb3_pcs_tbl),
 	.vreg_list		= qmp_phy_vreg_l,
 	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
-	.regs			= qmp_v3_usb3phy_regs_layout,
+	.regs			= qmp_v3_usb3phy_regs_layout_qcm2290,
 };
 
 static void qmp_usb_configure_lane(void __iomem *base,
@@ -1761,8 +1773,8 @@ static void qmp_usb_enable_autonomous_mode(struct qmp_usb *qmp)
 	qphy_setbits(pcs_usb, cfg->regs[QPHY_PCS_AUTONOMOUS_MODE_CTRL], intr_mask);
 
 	/* Enable i/o clamp_n for autonomous mode */
-	if (pcs_misc)
-		qphy_clrbits(pcs_misc, QPHY_V3_PCS_MISC_CLAMP_ENABLE, CLAMP_EN);
+	if (pcs_misc && cfg->regs[QPHY_PCS_MISC_CLAMP_ENABLE])
+		qphy_clrbits(pcs_misc, cfg->regs[QPHY_PCS_MISC_CLAMP_ENABLE], CLAMP_EN);
 }
 
 static void qmp_usb_disable_autonomous_mode(struct qmp_usb *qmp)
@@ -1772,8 +1784,8 @@ static void qmp_usb_disable_autonomous_mode(struct qmp_usb *qmp)
 	void __iomem *pcs_misc = qmp->pcs_misc;
 
 	/* Disable i/o clamp_n on resume for normal mode */
-	if (pcs_misc)
-		qphy_setbits(pcs_misc, QPHY_V3_PCS_MISC_CLAMP_ENABLE, CLAMP_EN);
+	if (pcs_misc && cfg->regs[QPHY_PCS_MISC_CLAMP_ENABLE])
+		qphy_setbits(pcs_misc, cfg->regs[QPHY_PCS_MISC_CLAMP_ENABLE], CLAMP_EN);
 
 	qphy_clrbits(pcs_usb, cfg->regs[QPHY_PCS_AUTONOMOUS_MODE_CTRL],
 		     ARCVR_DTCT_EN | ARCVR_DTCT_EVENT_SEL | ALFPS_DTCT_EN);
-- 
2.39.2