pinctrl: tegra: add support for rcv-sel and drive type

NVIDIA's Tegra114 added two more configuration parameter in pinmux i.e.
rcv-sel and drive type.

rcv-sel: Select between High and Normal VIL/VIH receivers.
	RCVR_SEL=1: High VIL/VIH
	RCVR_SEL=0: Normal VIL/VIH

drv_type: Ouptput drive type:
	33-50 ohm driver: 0x1
	66-100ohm driver: 0x0

Add support of these parameters to be configure from DTS file.

Tegra20 and Tegra30 does not support this configuration and hence initialize their
pinmux structure with reg = -1.

Originally written by Pritesh Raithatha.
Changes by ldewangan:
	- remove drvtype_width as it is always 2.
	- Better describe the change.

Signed-off-by: Pritesh Raithatha <praithatha@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

4 files changed, 40 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-tegra.c b/drivers/pinctrl/pinctrl-tegra.c
index ae1e4bb3259d..f195d77a3572 100644
--- a/drivers/pinctrl/pinctrl-tegra.c
+++ b/drivers/pinctrl/pinctrl-tegra.c
@@ -201,6 +201,7 @@ static const struct cfg_param {
         {"nvidia,open-drain",           TEGRA_PINCONF_PARAM_OPEN_DRAIN},
         {"nvidia,lock",                 TEGRA_PINCONF_PARAM_LOCK},
         {"nvidia,io-reset",             TEGRA_PINCONF_PARAM_IORESET},
+        {"nvidia,rcv-sel",              TEGRA_PINCONF_PARAM_RCV_SEL},
         {"nvidia,high-speed-mode",      TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE},
         {"nvidia,schmitt",              TEGRA_PINCONF_PARAM_SCHMITT},
         {"nvidia,low-power-mode",       TEGRA_PINCONF_PARAM_LOW_POWER_MODE},
@@ -208,6 +209,7 @@ static const struct cfg_param {
         {"nvidia,pull-up-strength",     TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH},
         {"nvidia,slew-rate-falling",    TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
         {"nvidia,slew-rate-rising",     TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
+        {"nvidia,drive-type",           TEGRA_PINCONF_PARAM_DRIVE_TYPE},
 };
 
 static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
@@ -450,6 +452,12 @@ static int tegra_pinconf_reg(struct tegra_pmx *pmx,
                 *bit = g->ioreset_bit;
                 *width = 1;
                 break;
+        case TEGRA_PINCONF_PARAM_RCV_SEL:
+                *bank = g->rcv_sel_bank;
+                *reg = g->rcv_sel_reg;
+                *bit = g->rcv_sel_bit;
+                *width = 1;
+                break;
         case TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE:
                 *bank = g->drv_bank;
                 *reg = g->drv_reg;
@@ -492,6 +500,12 @@ static int tegra_pinconf_reg(struct tegra_pmx *pmx,
                 *bit = g->slwr_bit;
                 *width = g->slwr_width;
                 break;
+        case TEGRA_PINCONF_PARAM_DRIVE_TYPE:
+                *bank = g->drvtype_bank;
+                *reg = g->drvtype_reg;
+                *bit = g->drvtype_bit;
+                *width = 2;
+                break;
         default:
                 dev_err(pmx->dev, "Invalid config param %04x\n", param);
                 return -ENOTSUPP;
diff --git a/drivers/pinctrl/pinctrl-tegra.h b/drivers/pinctrl/pinctrl-tegra.h
index 62e380965c68..817f7061dc4c 100644
--- a/drivers/pinctrl/pinctrl-tegra.h
+++ b/drivers/pinctrl/pinctrl-tegra.h
@@ -30,6 +30,8 @@ enum tegra_pinconf_param {
         /* argument: Boolean */
         TEGRA_PINCONF_PARAM_IORESET,
         /* argument: Boolean */
+        TEGRA_PINCONF_PARAM_RCV_SEL,
+        /* argument: Boolean */
         TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE,
         /* argument: Boolean */
         TEGRA_PINCONF_PARAM_SCHMITT,
@@ -43,6 +45,8 @@ enum tegra_pinconf_param {
         TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING,
         /* argument: Integer, range is HW-dependant */
         TEGRA_PINCONF_PARAM_SLEW_RATE_RISING,
+        /* argument: Integer, range is HW-dependant */
+        TEGRA_PINCONF_PARAM_DRIVE_TYPE,
 };
 
 enum tegra_pinconf_pull {
@@ -95,6 +99,9 @@ struct tegra_function {
  * @ioreset_reg:        IO reset register offset. -1 if unsupported.
  * @ioreset_bank:       IO reset register bank. 0 if unsupported.
  * @ioreset_bit:        IO reset register bit. 0 if unsupported.
+ * @rcv_sel_reg:        Receiver select offset. -1 if unsupported.
+ * @rcv_sel_bank:       Receiver select bank. 0 if unsupported.
+ * @rcv_sel_bit:        Receiver select bit. 0 if unsupported.
  * @drv_reg:            Drive fields register offset. -1 if unsupported.
  *                      This register contains the hsm, schmitt, lpmd, drvdn,
  *                      drvup, slwr, and slwf parameters.
@@ -110,6 +117,9 @@ struct tegra_function {
  * @slwr_width:         Slew Rising field width. 0 if unsupported.
  * @slwf_bit:           Slew Falling register bit. 0 if unsupported.
  * @slwf_width:         Slew Falling field width. 0 if unsupported.
+ * @drvtype_reg:        Drive type fields register offset. -1 if unsupported.
+ * @drvtype_bank:       Drive type fields register bank. 0 if unsupported.
+ * @drvtype_bit:        Drive type register bit. 0 if unsupported.
  *
  * A representation of a group of pins (possibly just one pin) in the Tegra
  * pin controller. Each group allows some parameter or parameters to be
@@ -131,15 +141,19 @@ struct tegra_pingroup {
         s16 odrain_reg;
         s16 lock_reg;
         s16 ioreset_reg;
+        s16 rcv_sel_reg;
         s16 drv_reg;
+        s16 drvtype_reg;
         u32 mux_bank:2;
         u32 pupd_bank:2;
         u32 tri_bank:2;
         u32 einput_bank:2;
         u32 odrain_bank:2;
         u32 ioreset_bank:2;
+        u32 rcv_sel_bank:2;
         u32 lock_bank:2;
         u32 drv_bank:2;
+        u32 drvtype_bank:2;
         u32 mux_bit:5;
         u32 pupd_bit:5;
         u32 tri_bit:5;
@@ -147,6 +161,7 @@ struct tegra_pingroup {
         u32 odrain_bit:5;
         u32 lock_bit:5;
         u32 ioreset_bit:5;
+        u32 rcv_sel_bit:5;
         u32 hsm_bit:5;
         u32 schmitt_bit:5;
         u32 lpmd_bit:5;
@@ -154,6 +169,7 @@ struct tegra_pingroup {
         u32 drvup_bit:5;
         u32 slwr_bit:5;
         u32 slwf_bit:5;
+        u32 drvtype_bit:5;
         u32 drvdn_width:6;
         u32 drvup_width:6;
         u32 slwr_width:6;
diff --git a/drivers/pinctrl/pinctrl-tegra20.c b/drivers/pinctrl/pinctrl-tegra20.c
index e848189038f0..fcfb7d012c5b 100644
--- a/drivers/pinctrl/pinctrl-tegra20.c
+++ b/drivers/pinctrl/pinctrl-tegra20.c
@@ -2624,7 +2624,9 @@ static const struct tegra_function tegra20_functions[] = {
                 .odrain_reg = -1,                               \
                 .lock_reg = -1,                                 \
                 .ioreset_reg = -1,                              \
+                .rcv_sel_reg = -1,                              \
                 .drv_reg = -1,                                  \
+                .drvtype_reg = -1,                              \
         }
 
 /* Pin groups with only pull up and pull down control */
@@ -2642,7 +2644,9 @@ static const struct tegra_function tegra20_functions[] = {
                 .odrain_reg = -1,                               \
                 .lock_reg = -1,                                 \
                 .ioreset_reg = -1,                              \
+                .rcv_sel_reg = -1,                              \
                 .drv_reg = -1,                                  \
+                .drvtype_reg = -1,                              \
         }
 
 /* Pin groups for drive strength registers (configurable version) */
@@ -2660,6 +2664,7 @@ static const struct tegra_function tegra20_functions[] = {
                 .odrain_reg = -1,                               \
                 .lock_reg = -1,                                 \
                 .ioreset_reg = -1,                              \
+                .rcv_sel_reg = -1,                              \
                 .drv_reg = ((r) - PINGROUP_REG_A),              \
                 .drv_bank = 3,                                  \
                 .hsm_bit = hsm_b,                               \
@@ -2673,6 +2678,7 @@ static const struct tegra_function tegra20_functions[] = {
                 .slwr_width = slwr_w,                           \
                 .slwf_bit = slwf_b,                             \
                 .slwf_width = slwf_w,                           \
+                .drvtype_reg = -1,                              \
         }
 
 /* Pin groups for drive strength registers (simple version) */
diff --git a/drivers/pinctrl/pinctrl-tegra30.c b/drivers/pinctrl/pinctrl-tegra30.c
index 9ad87ea735d4..2300deba25bd 100644
--- a/drivers/pinctrl/pinctrl-tegra30.c
+++ b/drivers/pinctrl/pinctrl-tegra30.c
@@ -3384,7 +3384,9 @@ static const struct tegra_function tegra30_functions[] = {
                 .ioreset_reg = PINGROUP_REG_##ior(r),           \
                 .ioreset_bank = 1,                              \
                 .ioreset_bit = 8,                               \
+                .rcv_sel_reg = -1,                              \
                 .drv_reg = -1,                                  \
+                .drvtype_reg = -1,                              \
         }
 
 #define DRV_PINGROUP(pg_name, r, hsm_b, schmitt_b, lpmd_b,      \
@@ -3401,6 +3403,7 @@ static const struct tegra_function tegra30_functions[] = {
                 .odrain_reg = -1,                               \
                 .lock_reg = -1,                                 \
                 .ioreset_reg = -1,                              \
+                .rcv_sel_reg = -1,                              \
                 .drv_reg = ((r) - DRV_PINGROUP_REG_A),          \
                 .drv_bank = 0,                                  \
                 .hsm_bit = hsm_b,                               \
@@ -3414,6 +3417,7 @@ static const struct tegra_function tegra30_functions[] = {
                 .slwr_width = slwr_w,                           \
                 .slwf_bit = slwf_b,                             \
                 .slwf_width = slwf_w,                           \
+                .drvtype_reg = -1,                              \
         }
 
 static const struct tegra_pingroup tegra30_groups[] = {