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authorShawn Guo <shawn.guo@linaro.org>2012-04-28 13:00:50 +0800
committerLinus Walleij <linus.walleij@linaro.org>2012-05-02 01:18:27 +0200
commit17723111e64fbcc327846ff0b33532bcf1d40f56 (patch)
tree08b6f0609a59dab9f47a59ee339c54b4170405b2 /drivers/pinctrl/pinctrl-mxs.h
parentd8fe35727a3c7e0f2c4ff0a579aab1d7ce252df8 (diff)
downloadop-kernel-dev-17723111e64fbcc327846ff0b33532bcf1d40f56.zip
op-kernel-dev-17723111e64fbcc327846ff0b33532bcf1d40f56.tar.gz
pinctrl: add pinctrl-mxs support
Add pinctrl support for Freescale MXS SoCs, i.MX23 and i.MX28. The driver supports device tree probe only. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-mxs.h')
-rw-r--r--drivers/pinctrl/pinctrl-mxs.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-mxs.h b/drivers/pinctrl/pinctrl-mxs.h
new file mode 100644
index 0000000..fdd88d0b
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-mxs.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __PINCTRL_MXS_H
+#define __PINCTRL_MXS_H
+
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+
+#define SET 0x4
+#define CLR 0x8
+#define TOG 0xc
+
+#define MXS_PINCTRL_PIN(pin) PINCTRL_PIN(pin, #pin)
+#define PINID(bank, pin) ((bank) * 32 + (pin))
+
+/*
+ * pinmux-id bit field definitions
+ *
+ * bank: 15..12 (4)
+ * pin: 11..4 (8)
+ * muxsel: 3..0 (4)
+ */
+#define MUXID_TO_PINID(m) PINID((m) >> 12 & 0xf, (m) >> 4 & 0xff)
+#define MUXID_TO_MUXSEL(m) ((m) & 0xf)
+
+#define PINID_TO_BANK(p) ((p) >> 5)
+#define PINID_TO_PIN(p) ((p) % 32)
+
+/*
+ * pin config bit field definitions
+ *
+ * pull-up: 6..5 (2)
+ * voltage: 4..3 (2)
+ * mA: 2..0 (3)
+ *
+ * MSB of each field is presence bit for the config.
+ */
+#define PULL_PRESENT (1 << 6)
+#define PULL_SHIFT 5
+#define VOL_PRESENT (1 << 4)
+#define VOL_SHIFT 3
+#define MA_PRESENT (1 << 2)
+#define MA_SHIFT 0
+#define CONFIG_TO_PULL(c) ((c) >> PULL_SHIFT & 0x1)
+#define CONFIG_TO_VOL(c) ((c) >> VOL_SHIFT & 0x1)
+#define CONFIG_TO_MA(c) ((c) >> MA_SHIFT & 0x3)
+
+struct mxs_function {
+ const char *name;
+ const char **groups;
+ unsigned ngroups;
+};
+
+struct mxs_group {
+ const char *name;
+ unsigned int *pins;
+ unsigned npins;
+ u8 *muxsel;
+ u8 config;
+};
+
+struct mxs_regs {
+ u16 muxsel;
+ u16 drive;
+ u16 pull;
+};
+
+struct mxs_pinctrl_soc_data {
+ const struct mxs_regs *regs;
+ const struct pinctrl_pin_desc *pins;
+ unsigned npins;
+ struct mxs_function *functions;
+ unsigned nfunctions;
+ struct mxs_group *groups;
+ unsigned ngroups;
+};
+
+int mxs_pinctrl_probe(struct platform_device *pdev,
+ struct mxs_pinctrl_soc_data *soc);
+int mxs_pinctrl_remove(struct platform_device *pdev);
+
+#endif /* __PINCTRL_MXS_H */
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