kernel_optimize_test/drivers/pinctrl/pinctrl-nomadik.h
Jean-Nicolas Graux c22df08c7f pinctrl/nomadik: support other alternate-C functions
Upgrade nomadik pinctrl driver to enable selection of other
alternate-C[1-4] functions on some specific ux500 SoC pins.
Handling of those functions is done thanks to PRCM GPIOCR
registers. This was previously managed in PRCMU driver and
it was not really convenient. Idea is to provide a common
way to control all alternate functions.

Note that this improvement does not support the old-fashioned way
used to control nomadik pins, namely the "nmk_config_pin()" function
and its derivatives.

Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com>
Reviewed-by: Philippe Langlais <philippe.langlais@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-10-10 08:36:59 +02:00

183 lines
4.6 KiB
C

#ifndef PINCTRL_PINCTRL_NOMADIK_H
#define PINCTRL_PINCTRL_NOMADIK_H
#include <plat/gpio-nomadik.h>
/* Package definitions */
#define PINCTRL_NMK_STN8815 0
#define PINCTRL_NMK_DB8500 1
#define PINCTRL_NMK_DB8540 2
#define PRCM_GPIOCR_ALTCX(pin_num,\
altc1_used, altc1_ri, altc1_cb,\
altc2_used, altc2_ri, altc2_cb,\
altc3_used, altc3_ri, altc3_cb,\
altc4_used, altc4_ri, altc4_cb)\
{\
.pin = pin_num,\
.altcx[PRCM_IDX_GPIOCR_ALTC1] = {\
.used = altc1_used,\
.reg_index = altc1_ri,\
.control_bit = altc1_cb\
},\
.altcx[PRCM_IDX_GPIOCR_ALTC2] = {\
.used = altc2_used,\
.reg_index = altc2_ri,\
.control_bit = altc2_cb\
},\
.altcx[PRCM_IDX_GPIOCR_ALTC3] = {\
.used = altc3_used,\
.reg_index = altc3_ri,\
.control_bit = altc3_cb\
},\
.altcx[PRCM_IDX_GPIOCR_ALTC4] = {\
.used = altc4_used,\
.reg_index = altc4_ri,\
.control_bit = altc4_cb\
},\
}
/**
* enum prcm_gpiocr_reg_index
* Used to reference an PRCM GPIOCR register address.
*/
enum prcm_gpiocr_reg_index {
PRCM_IDX_GPIOCR1,
PRCM_IDX_GPIOCR2,
PRCM_IDX_GPIOCR3
};
/**
* enum prcm_gpiocr_altcx_index
* Used to reference an Other alternate-C function.
*/
enum prcm_gpiocr_altcx_index {
PRCM_IDX_GPIOCR_ALTC1,
PRCM_IDX_GPIOCR_ALTC2,
PRCM_IDX_GPIOCR_ALTC3,
PRCM_IDX_GPIOCR_ALTC4,
PRCM_IDX_GPIOCR_ALTC_MAX,
};
/**
* struct prcm_gpio_altcx - Other alternate-C function
* @used: other alternate-C function availability
* @reg_index: PRCM GPIOCR register index used to control the function
* @control_bit: PRCM GPIOCR bit used to control the function
*/
struct prcm_gpiocr_altcx {
bool used:1;
u8 reg_index:2;
u8 control_bit:5;
} __packed;
/**
* struct prcm_gpio_altcx_pin_desc - Other alternate-C pin
* @pin: The pin number
* @altcx: array of other alternate-C[1-4] functions
*/
struct prcm_gpiocr_altcx_pin_desc {
unsigned short pin;
struct prcm_gpiocr_altcx altcx[PRCM_IDX_GPIOCR_ALTC_MAX];
};
/**
* struct nmk_function - Nomadik pinctrl mux function
* @name: The name of the function, exported to pinctrl core.
* @groups: An array of pin groups that may select this function.
* @ngroups: The number of entries in @groups.
*/
struct nmk_function {
const char *name;
const char * const *groups;
unsigned ngroups;
};
/**
* struct nmk_pingroup - describes a Nomadik pin group
* @name: the name of this specific pin group
* @pins: an array of discrete physical pins used in this group, taken
* from the driver-local pin enumeration space
* @num_pins: the number of pins in this group array, i.e. the number of
* elements in .pins so we can iterate over that array
* @altsetting: the altsetting to apply to all pins in this group to
* configure them to be used by a function
*/
struct nmk_pingroup {
const char *name;
const unsigned int *pins;
const unsigned npins;
int altsetting;
};
/**
* struct nmk_pinctrl_soc_data - Nomadik pin controller per-SoC configuration
* @gpio_ranges: An array of GPIO ranges for this SoC
* @gpio_num_ranges: The number of GPIO ranges for this SoC
* @pins: An array describing all pins the pin controller affects.
* All pins which are also GPIOs must be listed first within the
* array, and be numbered identically to the GPIO controller's
* numbering.
* @npins: The number of entries in @pins.
* @functions: The functions supported on this SoC.
* @nfunction: The number of entries in @functions.
* @groups: An array describing all pin groups the pin SoC supports.
* @ngroups: The number of entries in @groups.
* @altcx_pins: The pins that support Other alternate-C function on this SoC
* @npins_altcx: The number of Other alternate-C pins
* @prcm_gpiocr_registers: The array of PRCM GPIOCR registers on this SoC
*/
struct nmk_pinctrl_soc_data {
struct pinctrl_gpio_range *gpio_ranges;
unsigned gpio_num_ranges;
const struct pinctrl_pin_desc *pins;
unsigned npins;
const struct nmk_function *functions;
unsigned nfunctions;
const struct nmk_pingroup *groups;
unsigned ngroups;
const struct prcm_gpiocr_altcx_pin_desc *altcx_pins;
unsigned npins_altcx;
const u16 *prcm_gpiocr_registers;
};
#ifdef CONFIG_PINCTRL_STN8815
void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc);
#else
static inline void
nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc)
{
}
#endif
#ifdef CONFIG_PINCTRL_DB8500
void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc);
#else
static inline void
nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc)
{
}
#endif
#ifdef CONFIG_PINCTRL_DB8540
void nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc);
#else
static inline void
nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc)
{
}
#endif
#endif /* PINCTRL_PINCTRL_NOMADIK_H */