Lines Matching full:signal

22  * basis where a given pin can provide a number of different signal types.
24  * The signal active on a pin is described by both a priority level and
28  * change from a high to low priority signal), or even in the same register.
37  * corner. The signal priorities are in decending order from P0 (highest).
39  * D6 is a pin with a single function (beside GPIO); a high priority signal
42  * Ball | Default | P0 Signal | P0 Expression               | P1 Signal | P1 Expression | Other
47  * C5 is a multi-signal pin (high and low priority signals). Here we touch
48  * different registers for the different functions that enable each signal:
54  * E19 is a single-signal pin with two functions that influence the active
55  * signal. In this case both bits have the same meaning - enable a dedicated
63  * For example, pin B19 has a low-priority signal that's enabled by two
69 …* Ball | Default | P0 Signal | P0 Expression                           | P1 Signal | P1 Expression…
75  * pin's active signal:
88  * Pin T5 is a multi-signal pin with a more complex configuration:
90  * Ball | Default | P0 Signal | P0 Expression                | P1 Signal | P1 Expression | Other
95  * The high priority signal configuration is best thought of in terms of its
112  * function pin", where the signal itself is determined by whether SCU94[5:4]
124  * that despite operating as part of the video input bus each signal needs to
136  * signal's expressions with the function they participate in, rather than
142  * Ball |  Default   | P0 Signal | P0 Expression             | P1 Signal | P1 Expression | Other
148  * A12 demonstrates that the "Other" signal isn't always GPIO - in this case
149  * GPIOT0 is a high-priority signal and RGMII1TXCK is Other. Thus, GPIO
150  * should be treated like any other signal type with full function expression
152  * GPIOT1's signal descriptor bits are distinct, therefore we must iterate all
154  * that the signal for the function of interest is correctly enabled.
166  * * Pins provide up to five signal types in a priority order
168  * * For priorities levels defined on a pin, each priority provides one signal
178  * * A function is described by an expression of one or more signal
181  * * A signal expression is the smallest set of signal descriptors whose
182  *   comparisons must evaluate 'true' for a signal to be enabled on a pin.
184  * * A function's signal is active on a pin if evaluating all signal
185  *   descriptors in the pin's signal expression for the function yields a 'true'
188  * * A signal at a given priority on a given pin is active if any of the
189  *   functions in which the signal participates are active, and no higher
190  *   priority signal on the pin is active
196  * * To disable a signal, any function(s) activating the signal must be
199  * * Each pin must know the signal expressions of functions in which it
208  * * The VPIDE signal participates in 3 functions: VPI18, VPI24 and VPI30
210  * * The NDCD1 signal participates in just its own NDCD1 function
215  * * The prerequisit for activating the NDCD1 signal is that the VPI18, VPI24
244  * opposed to naming them e.g. PINMUX_CTRL_[0-9]). Further, signal expressions
268   * A signal descriptor, which describes the register, bits and the
290  * Describes a signal expression. The expression is evaluated by ANDing the
293  * @signal: The signal name for the priority level on the pin. If the signal
294  *          type is GPIO, then the signal name must begin with the string
296  * @function: The name of the function the signal participates in for the
298  * @ndescs: The number of signal descriptors in the expression
299  * @descs: Pointer to an array of signal descriptors that comprise the
303 	const char *signal;  member
311  * for a given pin. The signal configuration for a priority level is evaluated
312  * by ORing the evaluation of the signal expressions in the respective
333  * @reg: The signal's associated register, offset from base
334  * @idx: The signal's bit index in the register
360 		.signal = #sig, \
367  * Declare a signal expression.
369  * @sig: A macro symbol name for the signal (is subjected to stringification
371  * @func: The function in which the signal is participating
372  * @...: Signal descriptors that define the signal expression
374  * For example, the following declares the ROMD8 signal for the ROM16 function:
378  * And with multiple signal descriptors:
388  * Declare a pointer to a signal expression
390  * @sig: The macro symbol name for the signal (subjected to token pasting)
398  * Declare a signal expression list for reference in a struct aspeed_pin_prio.
400  * @sig: A macro symbol name for the signal (is subjected to token pasting)
401  * @...: Signal expression structure pointers (use SIG_EXPR_PTR())
403  * For example, the 16-bit ROM bus can be enabled by one of two possible signal
423  * For example, signal NCTS6 participates in its own function with one group:
448  * Declare a multi-signal pin
452  * @high: Macro name for the highest priority signal functions
453  * @low: Macro name for the low signal functions
480  * Declare a single signal pin
484  * @sig: Macro name for the signal (subjected to stringification)
497  * Single signal, single function pin declaration
501  * @sig: Macro name for the signal (subjected to stringification)
502  * @...: Signal descriptors that define the function expression