| Kyungmin Park | b0d5217 | 2009-11-17 08:41:16 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/plat-s5pc1xx/gpio-config.c |
| 2 | * |
| 3 | * Copyright 2009 Samsung Electronics |
| 4 | * |
| 5 | * S5PC1XX GPIO Configuration. |
| 6 | * |
| 7 | * Based on plat-s3c64xx/gpio-config.c |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/gpio.h> |
| 17 | #include <linux/io.h> |
| 18 | |
| 19 | #include <mach/gpio-core.h> |
| 20 | #include <plat/gpio-cfg-s5pc1xx.h> |
| 21 | |
| 22 | s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin, unsigned int off) |
| 23 | { |
| 24 | struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin); |
| 25 | void __iomem *reg; |
| 26 | int shift = off * 2; |
| 27 | u32 drvstr; |
| 28 | |
| 29 | if (!chip) |
| 30 | return -EINVAL; |
| 31 | |
| 32 | reg = chip->base + 0x0C; |
| 33 | |
| 34 | drvstr = __raw_readl(reg); |
| 35 | drvstr = 0xffff & (0x3 << shift); |
| 36 | drvstr = drvstr >> shift; |
| 37 | |
| 38 | return (__force s5p_gpio_drvstr_t)drvstr; |
| 39 | } |
| 40 | EXPORT_SYMBOL(s5p_gpio_get_drvstr); |
| 41 | |
| 42 | int s5p_gpio_set_drvstr(unsigned int pin, unsigned int off, |
| 43 | s5p_gpio_drvstr_t drvstr) |
| 44 | { |
| 45 | struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin); |
| 46 | void __iomem *reg; |
| 47 | int shift = off * 2; |
| 48 | u32 tmp; |
| 49 | |
| 50 | if (!chip) |
| 51 | return -EINVAL; |
| 52 | |
| 53 | reg = chip->base + 0x0C; |
| 54 | |
| 55 | tmp = __raw_readl(reg); |
| 56 | tmp |= drvstr << shift; |
| 57 | |
| 58 | __raw_writel(tmp, reg); |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | EXPORT_SYMBOL(s5p_gpio_set_drvstr); |