u-boot-2014.07中s5p系列gpio的代码变化

u-boot-2014.07是没有使用kconfig 系统的最后一个uboot版本。从2014.10 开始启动kbuild进行代码配置，并加入了DM（驱动模型）支持。

本文只分析gpio的相关代码的演变。
在uboot的git网页中点击u-boot 2014.07分支，搜索gpio，在搜索结果中看到：

2014-05-13	Akshay Saraswat	S5P: Exynos: Config: Enable GPIO CMD config S5P: Exynos: Config: Enable GPIO CMD config Enabling configs for GPIO CMD, EXYNOS4 family and replacing exynos_gpio_get with new linear GPIO pin number...	commit | commitdiff | tree
2014-05-13	Akshay Saraswat	S5P: Exynos: Add GPIO pin numbering and rename definitions S5P: Exynos: Add GPIO pin numbering and rename definitions * Adds gpio pin numbering support for EXYNOS...  To have consistent 0..n-1 GPIO numbering the banks are divided * Rename GPIO definitions from GPIO_... to S5P_GPIO_... ...changes were done to enable cmd_gpio for EXYNOS and cmd_gpio has GPIO_INPUT same as s5p_gpio...  * Adds support for name to gpio conversion in s5p_gpio to enable gpio command EXYNOS SoCs. Function...  to decode the input gpio name to gpio number. Example: SMDK5420 # gpio set gpa00	commit | commitdiff | tree

点击标题S5P: Exynos: Add GPIO pin numbering and rename definitions查看详情，日志大致说明，旧代码的gpio定义可能会发生编译错误等，所以修改了gpio的定义相关代码。

还有关于GPIO驱动模型的演变，在2015.01版本中发生

2014-10-22

Simon Glass

dm: exynos: gpio: Convert to driver model dm: exynos: gpio: Convert to driver model Convert the exynos GPIO driver to driver model. This implements...  GPIO interface but not the extra Exynos...

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