3 * Marvell Semiconductor <www.marvell.com>
4 * Written-by: Prafulla Wadaskar <prafulla@marvell.com>,
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
28 #include <asm/arch/mfp.h>
29 #ifdef CONFIG_ARMADA100
30 #include <asm/arch/armada100.h>
32 #error Unsupported SoC...
38 * On most of Marvell SoCs (ex. ARMADA100) there is Multi-Funtion-Pin
39 * configuration registers to configure each GPIO/Function pin on the
42 * This function reads the array of values for
43 * MFPR_X registers and programms them into respective
44 * Multi-Function Pin registers.
45 * It supports - Alternate Function Selection programming.
48 * The Configureation value is constructed using MFP()
49 * array consists of 32bit values as defined in MFP(xx,xx..) macro
51 void mfp_config(u32 *mfp_cfgs)
57 cfg_val = *mfp_cfgs++;
58 /* exit if End of configuration table detected */
59 if (cfg_val == MFP_EOC)
62 p_mfpr = (u32 *)(MV_MFPR_BASE
63 + MFP_REG_GET_OFFSET(cfg_val));
65 /* Write a mfg register as per configuration */
67 if (cfg_val & MFP_AF_FLAG)
68 /* Abstract and program Afternate-Func Selection */
69 val |= cfg_val & MFP_AF_MASK;
70 if (cfg_val & MFP_EDGE_FLAG)
71 /* Abstract and program Edge configuration */
72 val |= cfg_val & MFP_LPM_EDGE_MASK;
73 if (cfg_val & MFP_DRIVE_FLAG)
74 /* Abstract and program Drive configuration */
75 val |= cfg_val & MFP_DRIVE_MASK;
76 if (cfg_val & MFP_PULL_FLAG)
77 /* Abstract and program Pullup/down configuration */
78 val |= cfg_val & MFP_PULL_MASK;
83 * perform a read-back of any MFPR register to make sure the
84 * previous writings are finished