diff options
Diffstat (limited to 'arch/arm/mach-ux500/cpu-db8500.c')
| -rw-r--r-- | arch/arm/mach-ux500/cpu-db8500.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c index 8540f8a6d0c..9f75feb07a2 100644 --- a/arch/arm/mach-ux500/cpu-db8500.c +++ b/arch/arm/mach-ux500/cpu-db8500.c @@ -18,6 +18,7 @@ #include <linux/platform_device.h> #include <linux/io.h> #include <linux/dma-mapping.h> +#include <linux/delay.h> #include <asm/pmu.h> #include <asm/mach/map.h> @@ -29,6 +30,7 @@ #include <mach/ste-dma40-db8500.h> #include "devices-db8500.h" +#include "prcc.h" /* minimum static i/o mapping required to boot U8500 platforms */ static struct map_desc u8500_uart_io_desc[] __initdata = { @@ -131,6 +133,35 @@ static struct platform_device db8500_prcmu_device = { .name = "db8500-prcmu", }; +static unsigned int per_clkrst_base[7] = { + 0, + U8500_CLKRST1_BASE, + U8500_CLKRST2_BASE, + U8500_CLKRST3_BASE, + 0, + 0, + U8500_CLKRST6_BASE, +}; + +void u8500_reset_ip(unsigned char per, unsigned int ip_mask) +{ + void __iomem *prcc_rst_set, *prcc_rst_clr; + + if (per == 0 || per == 4 || per == 5 || per > 6) + return; + + prcc_rst_set = __io_address(per_clkrst_base[per] + PRCC_K_SOFTRST_SET); + prcc_rst_clr = __io_address(per_clkrst_base[per] + PRCC_K_SOFTRST_CLR); + + /* Activate soft reset PRCC_K_SOFTRST_CLR */ + writel(ip_mask, prcc_rst_clr); + udelay(1); + + /* Release soft reset PRCC_K_SOFTRST_SET */ + writel(ip_mask, prcc_rst_set); + udelay(1); +} + static struct platform_device *platform_devs[] __initdata = { &u8500_gpio_devs[0], &u8500_gpio_devs[1], |