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rcar_gen3: drivers: cpld: fix power-off on reset 

Method cpld_reset_cpu of bl31 is called from the Linux kernel and uses
GPIO6, GPIO2 pins as SPI bus lines to control the CPLD device. But in the
kernel GPIO6_8 pin are initialized to work in interrupt mode instead of
the input/output mode. This leads to the fact that the SPI bus becomes
non-functional. In this patch we switch the GPIO6_8 pin back to the
input-output mode.

Signed-off-by: Sergii Boryshchenko <sergii.boryshchenko@globallogic.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
This commit is contained in:
Sergii Boryshchenko 2017-11-30 14:53:52 +02:00 committed by Marek Vasut
parent 47366cb13c
commit 458a449cfd
1 changed files with 4 additions and 0 deletions
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4
drivers/renesas/rcar/cpld/ulcb_cpld.c
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@ -24,6 +24,9 @@
#define GPIO_INOUTSEL2 0xE6052004
#define GPIO_INOUTSEL6 0xE6055404
/* General IO/Interrupt Switching Register */
#define GPIO_IOINTSEL6 0xE6055400
/* GPIO/perihperal function select */
#define PFC_GPSR2 0xE6060108
#define PFC_GPSR6 0xE6060118
@ -93,6 +96,7 @@ static void cpld_init(void)
gpio_pfc(PFC_GPSR2, SSTBZ);
gpio_pfc(PFC_GPSR6, MOSI);
gpio_set_value(GPIO_IOINTSEL6, SCLK, 0);
gpio_set_value(GPIO_OUTDT6, SCLK, 0);
gpio_set_value(GPIO_OUTDT2, SSTBZ, 1);
gpio_set_value(GPIO_OUTDT6, MOSI, 0);