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stm32mp1: shared resources: count GPIOZ bank pins 

Get number of pins in the GPIOZ bank with helper function
fdt_get_gpio_bank_pin_count(). Save the value in RAM to prevent
parsing the FDT several time for the same information.

Change-Id: Ie68e300804461ffce09914100a7d2962116023b5
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
This commit is contained in:
Etienne Carriere 2020-05-13 10:13:54 +02:00
parent eafe0eb066
commit 722999e3b5
1 changed files with 37 additions and 0 deletions
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37
plat/st/stm32mp1/stm32mp1_shared_resources.c
View File

@ -4,8 +4,45 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stdint.h>
#include <platform_def.h>
#include <common/debug.h>
#include <drivers/st/stm32_gpio.h>
#include <stm32mp_shared_resources.h>
/* GPIOZ pin count is saved in RAM to prevent parsing FDT several times */
static int8_t gpioz_nbpin = -1;
static unsigned int get_gpio_nbpin(unsigned int bank)
{
if (bank != GPIO_BANK_Z) {
int count = fdt_get_gpio_bank_pin_count(bank);
assert((count >= 0) || (count <= (GPIO_PIN_MAX + 1)));
return (unsigned int)count;
}
if (gpioz_nbpin < 0) {
int count = fdt_get_gpio_bank_pin_count(GPIO_BANK_Z);
assert((count == 0) || (count == STM32MP_GPIOZ_PIN_MAX_COUNT));
gpioz_nbpin = count;
}
return (unsigned int)gpioz_nbpin;
}
static unsigned int __unused get_gpioz_nbpin(void)
{
return get_gpio_nbpin(GPIO_BANK_Z);
}
/* Currently allow full access by non-secure to platform clock services */
bool stm32mp_nsec_can_access_clock(unsigned long clock_id)
{