[coreboot-gerrit] Patch set updated for coreboot: rockchip: Remove pulls for gpio_output(), clean up code
Patrick Georgi (pgeorgi@google.com)
gerrit at coreboot.org
Tue Sep 27 19:05:33 CEST 2016
Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16710
-gerrit
commit bad956abaf0f0e62f7c473c139c4752814c9d584
Author: Julius Werner <jwerner at chromium.org>
Date: Thu Sep 1 22:55:58 2016 -0700
rockchip: Remove pulls for gpio_output(), clean up code
Output GPIOs should never have a pull-up or pull-down resistor attached
since they're actively driven. Since some GPIOs get initialized with a
pull at power-on reset, we should explicitly overwrite that setting.
Most other platforms do this on gpio_output, but Rockchip hadn't yet.
Also, shuffle some code around to make things cleaner and allow for
easier code reuse.
BRANCH=None
BUG=chrome-os-partner:52526
TEST=Booted Kevin.
Change-Id: I1425d074ea1e90f4484e1e84a8002b057192c5f7
Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
Original-Commit-Id: df5b236bfd58b172435043c1cb792b917a4ec4ab
Original-Change-Id: I044266d71ef8bd0518316ff72d829d1ca1e30f35
Original-Signed-off-by: Julius Werner <jwerner at chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/382531
Original-Reviewed-by: Simon Glass <sjg at google.com>
---
src/soc/rockchip/common/gpio.c | 21 +++++++++++++++------
src/soc/rockchip/common/include/soc/gpio.h | 15 ++++++++++-----
src/soc/rockchip/rk3288/gpio.c | 2 +-
src/soc/rockchip/rk3399/gpio.c | 8 ++++----
4 files changed, 30 insertions(+), 16 deletions(-)
diff --git a/src/soc/rockchip/common/gpio.c b/src/soc/rockchip/common/gpio.c
index 6ea38d4..1ff0bc9 100644
--- a/src/soc/rockchip/common/gpio.c
+++ b/src/soc/rockchip/common/gpio.c
@@ -21,10 +21,15 @@
#include <soc/soc.h>
#include <stdlib.h>
-static void __gpio_input(gpio_t gpio, u32 pull)
+static void gpio_set_dir(gpio_t gpio, enum gpio_dir dir)
+{
+ clrsetbits_le32(&gpio_port[gpio.port]->swporta_ddr,
+ 1 << gpio.num, dir << gpio.num);
+}
+
+static void gpio_set_pull(gpio_t gpio, enum gpio_pull pull)
{
u32 pull_val = gpio_get_pull_val(gpio, pull);
- clrbits_le32(&gpio_port[gpio.port]->swporta_ddr, 1 << gpio.num);
if (is_pmu_gpio(gpio))
clrsetbits_le32(gpio_grf_reg(gpio), 3 << (gpio.idx * 2),
pull_val << (gpio.idx * 2));
@@ -35,17 +40,20 @@ static void __gpio_input(gpio_t gpio, u32 pull)
void gpio_input(gpio_t gpio)
{
- __gpio_input(gpio, PULLNONE);
+ gpio_set_pull(gpio, GPIO_PULLNONE);
+ gpio_set_dir(gpio, GPIO_INPUT);
}
void gpio_input_pulldown(gpio_t gpio)
{
- __gpio_input(gpio, PULLDOWN);
+ gpio_set_pull(gpio, GPIO_PULLDOWN);
+ gpio_set_dir(gpio, GPIO_INPUT);
}
void gpio_input_pullup(gpio_t gpio)
{
- __gpio_input(gpio, PULLUP);
+ gpio_set_pull(gpio, GPIO_PULLUP);
+ gpio_set_dir(gpio, GPIO_INPUT);
}
int gpio_get(gpio_t gpio)
@@ -55,7 +63,8 @@ int gpio_get(gpio_t gpio)
void gpio_output(gpio_t gpio, int value)
{
- setbits_le32(&gpio_port[gpio.port]->swporta_ddr, 1 << gpio.num);
clrsetbits_le32(&gpio_port[gpio.port]->swporta_dr, 1 << gpio.num,
!!value << gpio.num);
+ gpio_set_dir(gpio, GPIO_OUTPUT);
+ gpio_set_pull(gpio, GPIO_PULLNONE);
}
diff --git a/src/soc/rockchip/common/include/soc/gpio.h b/src/soc/rockchip/common/include/soc/gpio.h
index 2c72435..a888635 100644
--- a/src/soc/rockchip/common/include/soc/gpio.h
+++ b/src/soc/rockchip/common/include/soc/gpio.h
@@ -73,13 +73,18 @@ int is_pmu_gpio(gpio_t gpio);
/* Return the io addr of gpio register */
void *gpio_grf_reg(gpio_t gpio);
-enum {
- PULLNONE = 0,
- PULLUP,
- PULLDOWN
+enum gpio_pull {
+ GPIO_PULLNONE = 0,
+ GPIO_PULLUP = 1,
+ GPIO_PULLDOWN = 2,
+};
+
+enum gpio_dir {
+ GPIO_INPUT = 0,
+ GPIO_OUTPUT = 1,
};
/* The gpio pull bias setting may be different between SoCs */
-u32 gpio_get_pull_val(gpio_t gpio, u32 pull);
+u32 gpio_get_pull_val(gpio_t gpio, enum gpio_pull pull);
#endif
diff --git a/src/soc/rockchip/rk3288/gpio.c b/src/soc/rockchip/rk3288/gpio.c
index c610408..41056f8 100644
--- a/src/soc/rockchip/rk3288/gpio.c
+++ b/src/soc/rockchip/rk3288/gpio.c
@@ -51,7 +51,7 @@ void *gpio_grf_reg(gpio_t gpio)
return &rk3288_grf->gpio1_p[(gpio.port - 1)][gpio.bank];
}
-u32 gpio_get_pull_val(gpio_t gpio, u32 pull)
+u32 gpio_get_pull_val(gpio_t gpio, enum gpio_pull pull)
{
/* use the default gpio pull bias setting defined in soc/gpio.h */
return pull;
diff --git a/src/soc/rockchip/rk3399/gpio.c b/src/soc/rockchip/rk3399/gpio.c
index a0cf059..3316027 100644
--- a/src/soc/rockchip/rk3399/gpio.c
+++ b/src/soc/rockchip/rk3399/gpio.c
@@ -56,7 +56,7 @@ enum {
PULLUP_1V8 = 3,
};
-u32 gpio_get_pull_val(gpio_t gpio, u32 pull)
+u32 gpio_get_pull_val(gpio_t gpio, enum gpio_pull pull)
{
/* The default pull bias setting defined in soc/gpio.h */
u32 pull_val = pull;
@@ -67,13 +67,13 @@ u32 gpio_get_pull_val(gpio_t gpio, u32 pull)
if (IS_GPIO_BANK(gpio, 0, A) || IS_GPIO_BANK(gpio, 0, B) ||
IS_GPIO_BANK(gpio, 2, C) || IS_GPIO_BANK(gpio, 2, D)) {
switch (pull) {
- case PULLUP:
+ case GPIO_PULLUP:
pull_val = PULLUP_1V8;
break;
- case PULLDOWN:
+ case GPIO_PULLDOWN:
pull_val = PULLDOWN_1V8;
break;
- default:
+ case GPIO_PULLNONE:
pull_val = PULLNONE_1V8;
}
}
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