linux-kernel - [PATCH v2 01/10] pinctrl: dt-bindings: samsung: Add header with values used for configuration

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Message-id: <1472714638-15676-2-git-send-email-k.kozlowski@samsung.com>
Date:   Thu, 01 Sep 2016 09:23:49 +0200
From:   Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:     Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        Kukjin Kim <kgene@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, javier@....samsung.com,
        Linus Walleij <linus.walleij@...aro.org>,
        Krzysztof Kozlowski <k.kozlowski@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH v2 01/10] pinctrl: dt-bindings: samsung: Add header with values
 used for configuration

Hard-coded pinctrl configuration values are scattered through DTS files.
The numbers are difficult to decode by human, especially without the
datasheet.  Additionally the drive strength differs between Exynos SoC
families increasing the confusion.

The header will help making this more readable and maintainable.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
---
 MAINTAINERS                           |  1 +
 include/dt-bindings/pinctrl/samsung.h | 57 +++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 include/dt-bindings/pinctrl/samsung.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d8e81b1dde30..836bcd327ee4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9318,6 +9318,7 @@ L:	linux-arm-kernel@...ts.infradead.org (moderated for non-subscribers)
 L:	linux-samsung-soc@...r.kernel.org (moderated for non-subscribers)
 S:	Maintained
 F:	drivers/pinctrl/samsung/
+F:	include/dt-bindings/pinctrl/samsung.h
 
 PIN CONTROLLER - SINGLE
 M:	Tony Lindgren <tony@...mide.com>
diff --git a/include/dt-bindings/pinctrl/samsung.h b/include/dt-bindings/pinctrl/samsung.h
new file mode 100644
index 000000000000..0f410ba5ec7e
--- /dev/null
+++ b/include/dt-bindings/pinctrl/samsung.h
@@ -0,0 +1,57 @@
+/*
+ * Samsung's Exynos pinctrl bindings
+ *
+ * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Author: Krzysztof Kozlowski <krzk@...nel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __DT_BINDINGS_PINCTRL_EXYNOS_H__
+#define __DT_BINDINGS_PINCTRL_EXYNOS_H__
+
+#define EXYNOS_PIN_PULL_NONE		0
+#define EXYNOS_PIN_PULL_DOWN		1
+#define EXYNOS_PIN_PULL_UP		3
+
+/* Pin function in power down mode */
+#define EXYNOS_PIN_PDN_OUT0		0
+#define EXYNOS_PIN_PDN_OUT1		1
+#define EXYNOS_PIN_PDN_INPUT		2
+#define EXYNOS_PIN_PDN_PREV		3
+
+/* Drive strengths for Exynos3250, Exynos4 (all) and Exynos5250 */
+#define EXYNOS4_PIN_DRV_LV1		0
+#define EXYNOS4_PIN_DRV_LV2		2
+#define EXYNOS4_PIN_DRV_LV3		1
+#define EXYNOS4_PIN_DRV_LV4		3
+
+/* Drive strengths for Exynos5260 */
+#define EXYNOS5260_PIN_DRV_LV1		0
+#define EXYNOS5260_PIN_DRV_LV2		1
+#define EXYNOS5260_PIN_DRV_LV4		2
+#define EXYNOS5260_PIN_DRV_LV6		3
+
+/* Drive strengths for Exynos5410, Exynos542x and Exynos5800 */
+#define EXYNOS5420_PIN_DRV_LV1		0
+#define EXYNOS5420_PIN_DRV_LV2		1
+#define EXYNOS5420_PIN_DRV_LV3		2
+#define EXYNOS5420_PIN_DRV_LV4		3
+
+#define EXYONS_PIN_PDN_OUT0		0
+#define EXYNOS_PIN_PDN_OUT1		1
+#define EXYNOS_PIN_PDN_INPUT		2
+#define EXYNOS_PIN_PDN_PREV		3
+
+#define EXYNOS_PIN_FUNC_INPUT		0
+#define EXYNOS_PIN_FUNC_OUTPUT		1
+#define EXYNOS_PIN_FUNC_2		2
+#define EXYNOS_PIN_FUNC_3		3
+#define EXYNOS_PIN_FUNC_4		4
+#define EXYNOS_PIN_FUNC_5		5
+#define EXYNOS_PIN_FUNC_F		0xf
+
+#endif /* __DT_BINDINGS_PINCTRL_EXYNOS_H__ */
-- 
1.9.1