[PATCH v2] rockchip: board: roc-pc-rk3399: Remove support for push button

[sunil at amarulasolutions.com]

From: Suniel Mahesh <sunil at amarulasolutions.com>

In case of a power interruption, human intervention is required which
is not desirable if the device is installed at a remote location. Drop
yellow LED as it is not much of use. Keep red LED(diy-led) as it is, to
indicate board in full power mode.

Signed-off-by: Suniel Mahesh <sunil at amarulasolutions.com>
---
Changes for v2:

- no changes
- An explanation for why this patch is required is already sent
  in the thread. Let me know if you need any more changes.
- Tested on firefly roc-pc-rk3399, an rk3399 based target.
---
 board/firefly/roc-pc-rk3399/roc-pc-rk3399.c | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c b/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c
index de9185a..0fe1914 100644
--- a/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c
+++ b/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c
@@ -10,7 +10,6 @@
 #include <spl_gpio.h>
 #include <asm/io.h>
 #include <asm/arch-rockchip/gpio.h>
-#include <asm/arch-rockchip/grf_rk3399.h>
 
 #ifndef CONFIG_SPL_BUILD
 int board_early_init_f(void)
@@ -34,26 +33,13 @@ out:
 
 #if defined(CONFIG_TPL_BUILD)
 
-#define PMUGRF_BASE     0xff320000
 #define GPIO0_BASE      0xff720000
 
 int board_early_init_f(void)
 {
 	struct rockchip_gpio_regs * const gpio0 = (void *)GPIO0_BASE;
-	struct rk3399_pmugrf_regs * const pmugrf = (void *)PMUGRF_BASE;
 
-	/**
-	 * 1. Glow yellow LED, termed as low power
-	 * 2. Poll for on board power key press
-	 * 3. Once 2 done, off yellow and glow red LED, termed as full power
-	 * 4. Continue booting...
-	 */
-	spl_gpio_output(gpio0, GPIO(BANK_A, 2), 1);
-
-	spl_gpio_set_pull(&pmugrf->gpio0_p, GPIO(BANK_A, 5), GPIO_PULL_NORMAL);
-	while (readl(&gpio0->ext_port) & 0x20);
-
-	spl_gpio_output(gpio0, GPIO(BANK_A, 2), 0);
+	/* Turn on red LED, indicating full power mode */
 	spl_gpio_output(gpio0, GPIO(BANK_B, 5), 1);
 
 	return 0;
-- 
2.7.4