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authorViresh Kumar <viresh.kumar@st.com>2012-03-28 22:27:07 +0530
committerArnd Bergmann <arnd@arndb.de>2012-04-22 22:49:23 +0200
commitdeda8287e1a602393b052c80b815b3706987b3da (patch)
tree49f77fb650a90a6aaff711206067ff2e1ba6a445 /drivers/pinctrl/spear/pinctrl-spear.h
parentf3215b427bec2add8b5c776e8f50c3ba35b0e8f1 (diff)
downloadlinux-deda8287e1a602393b052c80b815b3706987b3da.tar.gz
pinctrl: Add SPEAr pinctrl drivers
This adds pinctrl driver for SPEAr platform. It also updates MAINTAINERS file for SPEAr pinctrl drivers. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Stephen Warren <swarren@wwwdotorg.org>
Diffstat (limited to 'drivers/pinctrl/spear/pinctrl-spear.h')
-rw-r--r--drivers/pinctrl/spear/pinctrl-spear.h142
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/pinctrl/spear/pinctrl-spear.h b/drivers/pinctrl/spear/pinctrl-spear.h
new file mode 100644
index 00000000000..47a6b5b72f9
--- /dev/null
+++ b/drivers/pinctrl/spear/pinctrl-spear.h
@@ -0,0 +1,142 @@
+/*
+ * Driver header file for the ST Microelectronics SPEAr pinmux
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Viresh Kumar <viresh.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __PINMUX_SPEAR_H__
+#define __PINMUX_SPEAR_H__
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/types.h>
+
+struct platform_device;
+struct device;
+
+/**
+ * struct spear_pmx_mode - SPEAr pmx mode
+ * @name: name of pmx mode
+ * @mode: mode id
+ * @reg: register for configuring this mode
+ * @mask: mask of this mode in reg
+ * @val: val to be configured at reg after doing (val & mask)
+ */
+struct spear_pmx_mode {
+ const char *const name;
+ u16 mode;
+ u16 reg;
+ u16 mask;
+ u32 val;
+};
+
+/**
+ * struct spear_muxreg - SPEAr mux reg configuration
+ * @reg: register offset
+ * @mask: mask bits
+ * @val: val to be written on mask bits
+ */
+struct spear_muxreg {
+ u16 reg;
+ u32 mask;
+ u32 val;
+};
+
+/**
+ * struct spear_modemux - SPEAr mode mux configuration
+ * @modes: mode ids supported by this group of muxregs
+ * @nmuxregs: number of muxreg configurations to be done for modes
+ * @muxregs: array of muxreg configurations to be done for modes
+ */
+struct spear_modemux {
+ u16 modes;
+ u8 nmuxregs;
+ struct spear_muxreg *muxregs;
+};
+
+/**
+ * struct spear_pingroup - SPEAr pin group configurations
+ * @name: name of pin group
+ * @pins: array containing pin numbers
+ * @npins: size of pins array
+ * @modemuxs: array of modemux configurations for this pin group
+ * @nmodemuxs: size of array modemuxs
+ *
+ * A representation of a group of pins in the SPEAr pin controller. Each group
+ * allows some parameter or parameters to be configured.
+ */
+struct spear_pingroup {
+ const char *name;
+ const unsigned *pins;
+ unsigned npins;
+ struct spear_modemux *modemuxs;
+ unsigned nmodemuxs;
+};
+
+/**
+ * struct spear_function - SPEAr pinctrl mux function
+ * @name: The name of the function, exported to pinctrl core.
+ * @groups: An array of pin groups that may select this function.
+ * @ngroups: The number of entries in @groups.
+ */
+struct spear_function {
+ const char *name;
+ const char *const *groups;
+ unsigned ngroups;
+};
+
+/**
+ * struct spear_pinctrl_machdata - SPEAr pin controller machine driver
+ * configuration
+ * @pins: An array describing all pins the pin controller affects.
+ * All pins which are also GPIOs must be listed first within the *array,
+ * and be numbered identically to the GPIO controller's *numbering.
+ * @npins: The numbmer of entries in @pins.
+ * @functions: An array describing all mux functions the SoC supports.
+ * @nfunctions: The numbmer of entries in @functions.
+ * @groups: An array describing all pin groups the pin SoC supports.
+ * @ngroups: The numbmer of entries in @groups.
+ *
+ * @modes_supported: Does SoC support modes
+ * @mode: mode configured from probe
+ * @pmx_modes: array of modes supported by SoC
+ * @npmx_modes: number of entries in pmx_modes.
+ */
+struct spear_pinctrl_machdata {
+ const struct pinctrl_pin_desc *pins;
+ unsigned npins;
+ struct spear_function **functions;
+ unsigned nfunctions;
+ struct spear_pingroup **groups;
+ unsigned ngroups;
+
+ bool modes_supported;
+ u16 mode;
+ struct spear_pmx_mode **pmx_modes;
+ unsigned npmx_modes;
+};
+
+/**
+ * struct spear_pmx - SPEAr pinctrl mux
+ * @dev: pointer to struct dev of platform_device registered
+ * @pctl: pointer to struct pinctrl_dev
+ * @machdata: pointer to SoC or machine specific structure
+ * @vbase: virtual base address of pinmux controller
+ */
+struct spear_pmx {
+ struct device *dev;
+ struct pinctrl_dev *pctl;
+ struct spear_pinctrl_machdata *machdata;
+ void __iomem *vbase;
+};
+
+/* exported routines */
+void __devinit pmx_init_addr(struct spear_pinctrl_machdata *machdata, u16 reg);
+int __devinit spear_pinctrl_probe(struct platform_device *pdev,
+ struct spear_pinctrl_machdata *machdata);
+int __devexit spear_pinctrl_remove(struct platform_device *pdev);
+#endif /* __PINMUX_SPEAR_H__ */