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.
66  * The pullup and pulldown state of the MFP pin at run mode is by default
85  * (most likely a read-modify-write operation) is atomic, and that
93 	unsigned long	config;		/* -1 for not configured */
95 	unsigned long	mfpr_run;	/* Run-Mode Register Value */
96 	unsigned long	mfpr_lpm;	/* Low Power 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
173 		pin = MFP_PIN(c);  in mfp_config()
174 		BUG_ON(pin >= MFP_PIN_MAX);  in mfp_config()
175 		p = &mfp_table[pin];  in mfp_config()
183 		/* run-mode pull settings will conflict with MFPR bits of  in mfp_config()
184 		 * low power mode state,  calculate mfpr_run and mfpr_lpm  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()
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()
260 		} while ((i <= p->end) && (p->end != -1));  in mfp_init_addr()
269 	int pin;  in mfp_config_lpm()  local
271 	for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++, p++)  in mfp_config_lpm()
278 	int pin;  in mfp_config_run()  local
280 	for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++, p++)  in mfp_config_run()