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Message-Id: <1464681923-7469-11-git-send-email-yamada.masahiro@socionext.com>
Date: Tue, 31 May 2016 17:05:16 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: linux-gpio@...r.kernel.org
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>,
Linus Walleij <linus.walleij@...aro.org>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 10/17] pinctrl: uniphier: introduce capability flag
The core part of the UniPhier pinctrl driver needs to support a new
capability for upcoming UniPhier ARMv8 SoCs. This sometimes happens
because pinctrl drivers include really SoC-specific stuff.
This commit intends to tidy up SoC-specific parameters of the existing
drivers before adding the new one. Having just one flag would be
better than adding a new struct member every time a new SoC-specific
capability comes up.
At this time, there is one flag, UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE.
This capability (I'd say rather quirk) was added for PH1-Pro4 and
PH1-Pro5 as requirement from a customer. For those SoCs, one pin-mux
setting is controlled by the combination of two separate registers; the
LSB bits at register offset (8 * N) and the MSB bits at (8 * N + 4).
Because it is impossible to update two separate registers atomically,
the LOAD_PINCTRL register should be set in order to make the pin-mux
settings really effective.
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---
drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 35 +++++++++++++++++-------
drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c | 4 +--
drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c | 4 +--
drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c | 4 +--
drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c | 4 +--
drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c | 4 +--
drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c | 4 +--
drivers/pinctrl/uniphier/pinctrl-uniphier.h | 6 ++--
8 files changed, 34 insertions(+), 31 deletions(-)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
index 39e3375..ca2562a 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
@@ -552,9 +552,8 @@ static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
unsigned muxval)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
- unsigned mux_bits = priv->socdata->mux_bits;
- unsigned reg_stride = priv->socdata->reg_stride;
- unsigned reg, reg_end, shift, mask;
+ unsigned int mux_bits, reg_stride, reg, reg_end, shift, mask;
+ bool load_pinctrl;
int ret;
/* some pins need input-enabling */
@@ -563,6 +562,26 @@ static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
if (ret)
return ret;
+ if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
+ /*
+ * Mode reg_offset bit_position
+ * Normal 4 * n shift+3:shift
+ * Debug 4 * n shift+7:shift+4
+ */
+ mux_bits = 4;
+ reg_stride = 8;
+ load_pinctrl = true;
+ } else {
+ /*
+ * Mode reg_offset bit_position
+ * Normal 8 * n shift+3:shift
+ * Debug 8 * n + 4 shift+3:shift
+ */
+ mux_bits = 8;
+ reg_stride = 4;
+ load_pinctrl = false;
+ }
+
reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
reg_end = reg + reg_stride;
shift = pin * mux_bits % 32;
@@ -580,7 +599,7 @@ static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
muxval >>= mux_bits;
}
- if (priv->socdata->load_pinctrl) {
+ if (load_pinctrl) {
ret = regmap_write(priv->regmap,
UNIPHIER_PINCTRL_LOAD_PINMUX, 1);
if (ret)
@@ -658,12 +677,8 @@ int uniphier_pinctrl_probe(struct platform_device *pdev,
if (!socdata ||
!socdata->pins || !socdata->npins ||
- !socdata->groups ||
- !socdata->groups_count ||
- !socdata->functions ||
- !socdata->functions_count ||
- !socdata->mux_bits ||
- !socdata->reg_stride) {
+ !socdata->groups || !socdata->groups_count ||
+ !socdata->functions || !socdata->functions_count) {
dev_err(dev, "pinctrl socdata lacks necessary members\n");
return -EINVAL;
}
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c
index 4ada574..edea90d 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c
@@ -852,9 +852,7 @@ static struct uniphier_pinctrl_socdata uniphier_ld4_pindata = {
.groups_count = ARRAY_SIZE(uniphier_ld4_groups),
.functions = uniphier_ld4_functions,
.functions_count = ARRAY_SIZE(uniphier_ld4_functions),
- .mux_bits = 8,
- .reg_stride = 4,
- .load_pinctrl = false,
+ .caps = 0,
};
static int uniphier_ld4_pinctrl_probe(struct platform_device *pdev)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c
index 7ae42a4..2c9747b 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c
@@ -1240,9 +1240,7 @@ static struct uniphier_pinctrl_socdata uniphier_ld6b_pindata = {
.groups_count = ARRAY_SIZE(uniphier_ld6b_groups),
.functions = uniphier_ld6b_functions,
.functions_count = ARRAY_SIZE(uniphier_ld6b_functions),
- .mux_bits = 8,
- .reg_stride = 4,
- .load_pinctrl = false,
+ .caps = 0,
};
static int uniphier_ld6b_pinctrl_probe(struct platform_device *pdev)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
index 3735eb7..547359e 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
@@ -1526,9 +1526,7 @@ static struct uniphier_pinctrl_socdata uniphier_pro4_pindata = {
.groups_count = ARRAY_SIZE(uniphier_pro4_groups),
.functions = uniphier_pro4_functions,
.functions_count = ARRAY_SIZE(uniphier_pro4_functions),
- .mux_bits = 4,
- .reg_stride = 8,
- .load_pinctrl = true,
+ .caps = UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE,
};
static int uniphier_pro4_pinctrl_probe(struct platform_device *pdev)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c
index 7a883161..080332d 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c
@@ -1317,9 +1317,7 @@ static struct uniphier_pinctrl_socdata uniphier_pro5_pindata = {
.groups_count = ARRAY_SIZE(uniphier_pro5_groups),
.functions = uniphier_pro5_functions,
.functions_count = ARRAY_SIZE(uniphier_pro5_functions),
- .mux_bits = 4,
- .reg_stride = 8,
- .load_pinctrl = true,
+ .caps = UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE,
};
static int uniphier_pro5_pinctrl_probe(struct platform_device *pdev)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
index d8190e8..a2bf3f7 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
@@ -1235,9 +1235,7 @@ static struct uniphier_pinctrl_socdata uniphier_pxs2_pindata = {
.groups_count = ARRAY_SIZE(uniphier_pxs2_groups),
.functions = uniphier_pxs2_functions,
.functions_count = ARRAY_SIZE(uniphier_pxs2_functions),
- .mux_bits = 8,
- .reg_stride = 4,
- .load_pinctrl = false,
+ .caps = 0,
};
static int uniphier_pxs2_pinctrl_probe(struct platform_device *pdev)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c
index d2c4d90..ef86693 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c
@@ -760,9 +760,7 @@ static struct uniphier_pinctrl_socdata uniphier_sld8_pindata = {
.groups_count = ARRAY_SIZE(uniphier_sld8_groups),
.functions = uniphier_sld8_functions,
.functions_count = ARRAY_SIZE(uniphier_sld8_functions),
- .mux_bits = 8,
- .reg_stride = 4,
- .load_pinctrl = false,
+ .caps = 0,
};
static int uniphier_sld8_pinctrl_probe(struct platform_device *pdev)
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
index eca379a..3fd5020 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier.h
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
@@ -15,6 +15,7 @@
#ifndef __PINCTRL_UNIPHIER_H__
#define __PINCTRL_UNIPHIER_H__
+#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/types.h>
@@ -164,9 +165,8 @@ struct uniphier_pinctrl_socdata {
int groups_count;
const struct uniphier_pinmux_function *functions;
int functions_count;
- unsigned mux_bits;
- unsigned reg_stride;
- bool load_pinctrl;
+ unsigned int caps;
+#define UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE BIT(0)
};
#define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g) \
--
1.9.1
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