1 // SPDX-License-Identifier: GPL-2.0-only
3  * linux/arch/arm/plat-pxa/mfp.c
5  *   Multi-Function Pin Support
9  * 2007-08-21: eric miao <eric.miao@marvell.com>
43  * used in parentheses for don't-care values. Except for the float output,
45  * non-LPM pulled output, the same configuration could probably be used.
85  * (most likely a read-modify-write operation) is atomic, and that
93 	unsigned long	config;		/* -1 for not configured */
94 	unsigned long	mfpr_off;	/* MFPRxx Register offset */
95 	unsigned long	mfpr_run;	/* Run-Mode Register Value */
135 #define mfp_configured(p)	((p)->config != -1)
138  * perform a read-back of any valid MFPR register to make sure the
147 		mfpr_writel(p->mfpr_off, p->mfpr_run);  in __mfp_config_run()
153 		unsigned long mfpr_clr = (p->mfpr_run & ~MFPR_EDGE_BOTH) | MFPR_EDGE_CLEAR;  in __mfp_config_lpm()
154 		if (mfpr_clr != p->mfpr_run)  in __mfp_config_lpm()
155 			mfpr_writel(p->mfpr_off, mfpr_clr);  in __mfp_config_lpm()
156 		if (p->mfpr_lpm != mfpr_clr)  in __mfp_config_lpm()
157 			mfpr_writel(p->mfpr_off, p->mfpr_lpm);  in __mfp_config_lpm()
171 		int pin, af, drv, lpm, edge, pull;  in mfp_config()  local
180 		edge = MFP_LPM_EDGE(c);  in mfp_config()
183 		/* run-mode pull settings will conflict with MFPR bits of  in mfp_config()
190 			p->mfpr_run = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];  in mfp_config()
191 			p->mfpr_lpm = p->mfpr_run;  in mfp_config()
193 			p->mfpr_lpm = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];  in mfp_config()
194 			p->mfpr_run = tmp | mfpr_pull[pull];  in mfp_config()
197 		p->config = c; __mfp_config_run(p);  in mfp_config()
233 	/* initialize the table with default - unconfigured */  in mfp_init_base()
235 		mfp_table[i].config = -1;  in mfp_init_base()
243 	unsigned long offset, flags;  in mfp_init_addr()  local
248 	/* mfp offset for readback */  in mfp_init_addr()
249 	mfpr_off_readback = map[0].offset;  in mfp_init_addr()
251 	for (p = map; p->start != MFP_PIN_INVALID; p++) {  in mfp_init_addr()
252 		offset = p->offset;  in mfp_init_addr()
253 		i = p->start;  in mfp_init_addr()
256 			mfp_table[i].mfpr_off = offset;  in mfp_init_addr()
259 			offset += 4; i++;  in mfp_init_addr()
260 		} while ((i <= p->end) && (p->end != -1));  in mfp_init_addr()