| .. | .. |
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| 120 | 120 | return (v >> gpio) & 1; |
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| 121 | 121 | } |
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| 122 | 122 | |
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| 123 | | -/**********************************************************************/ |
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| 124 | | - |
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| 125 | | -/* Linux gpio framework integration. |
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| 126 | | -* |
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| 127 | | -* 4 use cases of Alchemy GPIOS: |
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| 128 | | -*(1) GPIOLIB=y, ALCHEMY_GPIO_INDIRECT=y: |
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| 129 | | -* Board must register gpiochips. |
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| 130 | | -*(2) GPIOLIB=y, ALCHEMY_GPIO_INDIRECT=n: |
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| 131 | | -* A gpiochip for the 75 GPIOs is registered. |
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| 132 | | -* |
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| 133 | | -*(3) GPIOLIB=n, ALCHEMY_GPIO_INDIRECT=y: |
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| 134 | | -* the boards' gpio.h must provide the linux gpio wrapper functions, |
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| 135 | | -* |
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| 136 | | -*(4) GPIOLIB=n, ALCHEMY_GPIO_INDIRECT=n: |
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| 137 | | -* inlinable gpio functions are provided which enable access to the |
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| 138 | | -* Au1300 gpios only by using the numbers straight out of the data- |
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| 139 | | -* sheets. |
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| 140 | | - |
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| 141 | | -* Cases 1 and 3 are intended for boards which want to provide their own |
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| 142 | | -* GPIO namespace and -operations (i.e. for example you have 8 GPIOs |
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| 143 | | -* which are in part provided by spare Au1300 GPIO pins and in part by |
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| 144 | | -* an external FPGA but you still want them to be accessible in linux |
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| 145 | | -* as gpio0-7. The board can of course use the alchemy_gpioX_* functions |
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| 146 | | -* as required). |
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| 147 | | -*/ |
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| 148 | | - |
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| 149 | | -#ifndef CONFIG_GPIOLIB |
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| 150 | | - |
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| 151 | | -#ifdef CONFIG_ALCHEMY_GPIOINT_AU1300 |
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| 152 | | - |
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| 153 | | -#ifndef CONFIG_ALCHEMY_GPIO_INDIRECT /* case (4) */ |
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| 154 | | - |
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| 155 | | -static inline int gpio_direction_input(unsigned int gpio) |
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| 156 | | -{ |
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| 157 | | - return au1300_gpio_direction_input(gpio); |
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| 158 | | -} |
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| 159 | | - |
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| 160 | | -static inline int gpio_direction_output(unsigned int gpio, int v) |
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| 161 | | -{ |
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| 162 | | - return au1300_gpio_direction_output(gpio, v); |
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| 163 | | -} |
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| 164 | | - |
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| 165 | | -static inline int gpio_get_value(unsigned int gpio) |
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| 166 | | -{ |
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| 167 | | - return au1300_gpio_get_value(gpio); |
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| 168 | | -} |
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| 169 | | - |
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| 170 | | -static inline void gpio_set_value(unsigned int gpio, int v) |
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| 171 | | -{ |
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| 172 | | - au1300_gpio_set_value(gpio, v); |
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| 173 | | -} |
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| 174 | | - |
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| 175 | | -static inline int gpio_get_value_cansleep(unsigned gpio) |
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| 176 | | -{ |
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| 177 | | - return gpio_get_value(gpio); |
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| 178 | | -} |
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| 179 | | - |
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| 180 | | -static inline void gpio_set_value_cansleep(unsigned gpio, int value) |
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| 181 | | -{ |
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| 182 | | - gpio_set_value(gpio, value); |
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| 183 | | -} |
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| 184 | | - |
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| 185 | | -static inline int gpio_is_valid(unsigned int gpio) |
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| 186 | | -{ |
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| 187 | | - return au1300_gpio_is_valid(gpio); |
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| 188 | | -} |
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| 189 | | - |
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| 190 | | -static inline int gpio_cansleep(unsigned int gpio) |
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| 191 | | -{ |
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| 192 | | - return au1300_gpio_cansleep(gpio); |
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| 193 | | -} |
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| 194 | | - |
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| 195 | | -static inline int gpio_to_irq(unsigned int gpio) |
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| 196 | | -{ |
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| 197 | | - return au1300_gpio_to_irq(gpio); |
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| 198 | | -} |
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| 199 | | - |
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| 200 | | -static inline int irq_to_gpio(unsigned int irq) |
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| 201 | | -{ |
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| 202 | | - return au1300_irq_to_gpio(irq); |
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| 203 | | -} |
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| 204 | | - |
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| 205 | | -static inline int gpio_request(unsigned int gpio, const char *label) |
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| 206 | | -{ |
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| 207 | | - return 0; |
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| 208 | | -} |
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| 209 | | - |
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| 210 | | -static inline int gpio_request_one(unsigned gpio, |
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| 211 | | - unsigned long flags, const char *label) |
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| 212 | | -{ |
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| 213 | | - return 0; |
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| 214 | | -} |
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| 215 | | - |
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| 216 | | -static inline int gpio_request_array(struct gpio *array, size_t num) |
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| 217 | | -{ |
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| 218 | | - return 0; |
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| 219 | | -} |
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| 220 | | - |
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| 221 | | -static inline void gpio_free(unsigned gpio) |
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| 222 | | -{ |
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| 223 | | -} |
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| 224 | | - |
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| 225 | | -static inline void gpio_free_array(struct gpio *array, size_t num) |
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| 226 | | -{ |
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| 227 | | -} |
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| 228 | | - |
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| 229 | | -static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
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| 230 | | -{ |
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| 231 | | - return -ENOSYS; |
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| 232 | | -} |
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| 233 | | - |
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| 234 | | -static inline void gpio_unexport(unsigned gpio) |
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| 235 | | -{ |
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| 236 | | -} |
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| 237 | | - |
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| 238 | | -static inline int gpio_export(unsigned gpio, bool direction_may_change) |
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| 239 | | -{ |
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| 240 | | - return -ENOSYS; |
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| 241 | | -} |
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| 242 | | - |
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| 243 | | -static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
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| 244 | | -{ |
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| 245 | | - return -ENOSYS; |
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| 246 | | -} |
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| 247 | | - |
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| 248 | | -static inline int gpio_export_link(struct device *dev, const char *name, |
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| 249 | | - unsigned gpio) |
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| 250 | | -{ |
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| 251 | | - return -ENOSYS; |
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| 252 | | -} |
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| 253 | | - |
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| 254 | | -#endif /* !CONFIG_ALCHEMY_GPIO_INDIRECT */ |
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| 255 | | - |
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| 256 | | -#endif /* CONFIG_ALCHEMY_GPIOINT_AU1300 */ |
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| 257 | | - |
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| 258 | | -#endif /* CONFIG GPIOLIB */ |
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| 259 | | - |
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| 260 | 123 | #endif /* _GPIO_AU1300_H_ */ |
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