2  * Code ported from Nomadik GPIO driver in ST-Ericsson Linux kernel code.
4  * copy-paste it to U-Boot.
11  * Ported to U-Boot by:
29  * The GPIO module in the db8500 Systems-on-Chip is an
37 #define GPIO_BLOCK(pin)		(((pin + GPIO_PINS_PER_BLOCK) >> 5) - 1)
83 /* Can only be called from config_pin. Don't configure alt-mode directly */
84 static void gpio_set_mode(unsigned gpio, enum db8500_gpio_alt mode)  in gpio_set_mode()  argument
86 	void __iomem *addr = get_gpio_addr(gpio);  in gpio_set_mode()  local
91 	afunc = readl(addr + DB8500_GPIO_AFSLA) & ~bit;  in gpio_set_mode()
92 	bfunc = readl(addr + DB8500_GPIO_AFSLB) & ~bit;  in gpio_set_mode()
93 	if (mode & DB8500_GPIO_ALT_A)  in gpio_set_mode()
95 	if (mode & DB8500_GPIO_ALT_B)  in gpio_set_mode()
97 	writel(afunc, addr + DB8500_GPIO_AFSLA);  in gpio_set_mode()
98 	writel(bfunc, addr + DB8500_GPIO_AFSLB);  in gpio_set_mode()
102  * db8500_gpio_set_pull() - enable/disable pull up/down on a gpio
117 	void __iomem *addr = get_gpio_addr(gpio);  in db8500_gpio_set_pull()  local
122 	pdis = readl(addr + DB8500_GPIO_PDIS);  in db8500_gpio_set_pull()
127 	writel(pdis, addr + DB8500_GPIO_PDIS);  in db8500_gpio_set_pull()
130 		writel(bit, addr + DB8500_GPIO_DATS);  in db8500_gpio_set_pull()
132 		writel(bit, addr + DB8500_GPIO_DATC);  in db8500_gpio_set_pull()
137 	void __iomem *addr = get_gpio_addr(gpio);  in db8500_gpio_make_input()  local
140 	writel(1 << offset, addr + DB8500_GPIO_DIRC);  in db8500_gpio_make_input()
145 	void __iomem *addr = get_gpio_addr(gpio);  in db8500_gpio_get_input()  local
149 	printf("db8500_gpio_get_input gpio=%u addr=%p offset=%u bit=%#x\n",  in db8500_gpio_get_input()
150 		gpio, addr, offset, bit);  in db8500_gpio_get_input()
152 	return (readl(addr + DB8500_GPIO_DAT) & bit) != 0;  in db8500_gpio_get_input()
157 	void __iomem *addr = get_gpio_addr(gpio);  in db8500_gpio_make_output()  local
160 	writel(1 << offset, addr + DB8500_GPIO_DIRS);  in db8500_gpio_make_output()
166 	void __iomem *addr = get_gpio_addr(gpio);  in db8500_gpio_set_output()  local
170 		writel(1 << offset, addr + DB8500_GPIO_DATS);  in db8500_gpio_set_output()
172 		writel(1 << offset, addr + DB8500_GPIO_DATC);  in db8500_gpio_set_output()
176  * config_pin - configure a pin's mux attributes
179  * Configures a pin's mode (alternate function or GPIO), its pull up status,
180  * and its sleep mode based on the specified configuration.  The @cfg is
181  * usually one of the SoC specific macros defined in mach/<soc>-pins.h.  These
185  * If a pin's mode is set to GPIO, it is configured as an input to avoid
186  * side-effects.  The gpio can be manipulated later using standard GPIO API
208  * db8500_config_pins - configure several pins at once