path: root/drivers/renesas
diff options
authorSergii Boryshchenko <sergii.boryshchenko@globallogic.com>2017-11-30 14:53:52 +0200
committerMarek Vasut <marek.vasut+renesas@gmail.com>2019-01-29 06:07:21 +0100
commit458a449cfd8bc80c4cfb11b3f8fdf5eb5ac1e11b (patch)
treea78d4a7024b09af4905e44c2c60846f1f92a8d0c /drivers/renesas
parent47366cb13c58cc37faec306b364b56ae04294a32 (diff)
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>
Diffstat (limited to 'drivers/renesas')
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/renesas/rcar/cpld/ulcb_cpld.c b/drivers/renesas/rcar/cpld/ulcb_cpld.c
index 6b0361497e..4830853739 100644
--- a/drivers/renesas/rcar/cpld/ulcb_cpld.c
+++ b/drivers/renesas/rcar/cpld/ulcb_cpld.c
@@ -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);