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gpio: davinci: move to platform device

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Modify DaVinci GPIO driver to become a platform device
driver.

The driver does not have platform driver structure or
a probe. Instead, it has pure_initcall function for
initialization. The platform specific informaiton is
obtained using the DaVinci specific davinci_soc_info
structure. This is a problem for Device Tree (DT)
implementation.

As a first stage of DT conversion, we implement a probe.

Additional notes:

- The driver registration happens as  postcore_initcall.
  This is required since machine init functions like
  da850_lcd_hw_init() make use of GPIO.
- Start using devres APIs for simpler error handling.

Signed-off-by: KV Sujith <sujithkv@ti.com>
[avinashphilip@ti.com: Move global definition of
		       "davinci_gpio_controller" to local]
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
[nsekhar@ti.com: drop unused structure member, rebase to new
		 clean-up patch and fix error messages]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
This commit is contained in:
KV Sujith
2013-08-18 10:48:58 +05:30
committed by Sekhar Nori
parent 131a10a395
commit 118150f22d
3 changed files with 107 additions and 38 deletions
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1
arch/arm/mach-davinci/include/mach/gpio-davinci.h
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@@ -60,6 +60,7 @@ struct davinci_gpio_controller {
void __iomem *set_data;
void __iomem *clr_data;
void __iomem *in_data;
unsigned gpio_irq;
};
/* The __gpio_to_controller() and __gpio_mask() functions inline to constants