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Message-ID: <1357387375-25919-1-git-send-email-ldewangan@nvidia.com>
Date: Sat, 5 Jan 2013 17:32:54 +0530
From: Laxman Dewangan <ldewangan@...dia.com>
To: <linus.walleij@...aro.org>
CC: <praithatha@...dia.com>, <grant.likely@...retlab.ca>,
<rob.herring@...xeda.com>, <devicetree-discuss@...ts.ozlabs.org>,
<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-tegra@...r.kernel.org>,
Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH 1/2] pinctrl: tegra: add support for rcv-sel and drive type
From: Pritesh Raithatha <praithatha@...dia.com>
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@...dia.com>
Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
drivers/pinctrl/pinctrl-tegra.c | 14 ++++++++++++++
drivers/pinctrl/pinctrl-tegra.h | 16 ++++++++++++++++
drivers/pinctrl/pinctrl-tegra20.c | 6 ++++++
drivers/pinctrl/pinctrl-tegra30.c | 4 ++++
4 files changed, 40 insertions(+), 0 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-tegra.c b/drivers/pinctrl/pinctrl-tegra.c
index ae1e4bb..f195d77 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 62e3809..817f706 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 e848189..fcfb7d0 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 9ad87ea..2300deb 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[] = {
--
1.7.1.1
--
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