~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/arm/plat-orion/mpp.c

Version: ~ [ linux-5.12-rc1 ] ~ [ linux-5.11.2 ] ~ [ linux-5.10.19 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.101 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.177 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.222 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.258 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.258 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * arch/arm/plat-orion/mpp.c
  3  *
  4  * MPP functions for Marvell orion SoCs
  5  *
  6  * This file is licensed under the terms of the GNU General Public
  7  * License version 2.  This program is licensed "as is" without any
  8  * warranty of any kind, whether express or implied.
  9  */
 10 
 11 #include <linux/kernel.h>
 12 #include <linux/init.h>
 13 #include <linux/mbus.h>
 14 #include <linux/io.h>
 15 #include <linux/gpio.h>
 16 #include <plat/orion-gpio.h>
 17 #include <plat/mpp.h>
 18 
 19 /* Address of the ith MPP control register */
 20 static __init void __iomem *mpp_ctrl_addr(unsigned int i,
 21                                           void __iomem *dev_bus)
 22 {
 23         return dev_bus + (i) * 4;
 24 }
 25 
 26 
 27 void __init orion_mpp_conf(unsigned int *mpp_list, unsigned int variant_mask,
 28                            unsigned int mpp_max, void __iomem *dev_bus)
 29 {
 30         unsigned int mpp_nr_regs = (1 + mpp_max/8);
 31         u32 mpp_ctrl[mpp_nr_regs];
 32         int i;
 33 
 34         printk(KERN_DEBUG "initial MPP regs:");
 35         for (i = 0; i < mpp_nr_regs; i++) {
 36                 mpp_ctrl[i] = readl(mpp_ctrl_addr(i, dev_bus));
 37                 printk(" %08x", mpp_ctrl[i]);
 38         }
 39         printk("\n");
 40 
 41         for ( ; *mpp_list; mpp_list++) {
 42                 unsigned int num = MPP_NUM(*mpp_list);
 43                 unsigned int sel = MPP_SEL(*mpp_list);
 44                 int shift, gpio_mode;
 45 
 46                 if (num > mpp_max) {
 47                         printk(KERN_ERR "orion_mpp_conf: invalid MPP "
 48                                         "number (%u)\n", num);
 49                         continue;
 50                 }
 51                 if (variant_mask && !(*mpp_list & variant_mask)) {
 52                         printk(KERN_WARNING
 53                                "orion_mpp_conf: requested MPP%u config "
 54                                "unavailable on this hardware\n", num);
 55                         continue;
 56                 }
 57 
 58                 shift = (num & 7) << 2;
 59                 mpp_ctrl[num / 8] &= ~(0xf << shift);
 60                 mpp_ctrl[num / 8] |= sel << shift;
 61 
 62                 gpio_mode = 0;
 63                 if (*mpp_list & MPP_INPUT_MASK)
 64                         gpio_mode |= GPIO_INPUT_OK;
 65                 if (*mpp_list & MPP_OUTPUT_MASK)
 66                         gpio_mode |= GPIO_OUTPUT_OK;
 67 
 68                 orion_gpio_set_valid(num, gpio_mode);
 69         }
 70 
 71         printk(KERN_DEBUG "  final MPP regs:");
 72         for (i = 0; i < mpp_nr_regs; i++) {
 73                 writel(mpp_ctrl[i], mpp_ctrl_addr(i, dev_bus));
 74                 printk(" %08x", mpp_ctrl[i]);
 75         }
 76         printk("\n");
 77 }
 78 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp