gpio: mpc8xxx: don't do RMW on gpdat register when setting value

[oweals/u-boot.git] / board / keymile / km_arm / fpga_config.c

diff --git a/board/keymile/km_arm/fpga_config.c b/board/keymile/km_arm/fpga_config.c
index 8ac63931ec5c288355be2156f92ed01eb7265a83..8bb0470bc3073aee35992c1b5fde8c819ae2fa0b 100644 (file)
--- a/board/keymile/km_arm/fpga_config.c
+++ b/board/keymile/km_arm/fpga_config.c
@@ -1,29 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2012
  * Valentin Lontgchamp, Keymile AG, valentin.longchamp@keymile.com
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.         See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301 USA
  */
 
 #include <common.h>
 #include <i2c.h>
-#include <asm/errno.h>
+#include <linux/errno.h>
 
 /* GPIO Pin from kirkwood connected to PROGRAM_B pin of the xilinx FPGA */
 #define KM_XLX_PROGRAM_B_PIN    39
@@ -99,7 +82,8 @@ static int boco_set_bits(u8 reg, u8 flags)
 #define FPGA_INIT_B    0x10
 #define FPGA_DONE      0x20
 
-static int fpga_done()
+#ifndef CONFIG_KM_FPGA_FORCE_CONFIG
+static int fpga_done(void)
 {
        int ret = 0;
        u8 regval;
@@ -117,13 +101,16 @@ static int fpga_done()
 
        return regval & FPGA_DONE ? 1 : 0;
 }
+#endif /* CONFIG_KM_FPGA_FORCE_CONFIG */
 
-int skip;
+static int skip;
 
 int trigger_fpga_config(void)
 {
        int ret = 0;
 
+       skip = 0;
+#ifndef CONFIG_KM_FPGA_FORCE_CONFIG
        /* if the FPGA is already configured, we do not want to
         * reconfigure it */
        skip = 0;
@@ -132,6 +119,7 @@ int trigger_fpga_config(void)
                skip = 1;
                return 0;
        }
+#endif /* CONFIG_KM_FPGA_FORCE_CONFIG */
 
        if (check_boco2()) {
                /* we have a BOCO2, this has to be triggered here */
@@ -205,31 +193,45 @@ int wait_for_fpga_config(void)
        return 0;
 }
 
+#if defined(CONFIG_KM_FPGA_NO_RESET)
+int fpga_reset(void)
+{
+       /* no dedicated reset pin for FPGA */
+       return 0;
+}
+#else
+
 #define PRST1          0x4
-#define BRIDGE_RST     0x4
+#define PCIE_RST       0x10
+#define TRAFFIC_RST    0x04
 
 int fpga_reset(void)
 {
        int ret = 0;
+       u8 resets;
 
        if (!check_boco2()) {
                /* we do not have BOCO2, this is not really used */
                return 0;
        }
 
-       ret = boco_clear_bits(PRST1, BRIDGE_RST);
+       /* if we have skipped, we only want to reset the PCIe part */
+       resets = skip ? PCIE_RST : PCIE_RST | TRAFFIC_RST;
+
+       ret = boco_clear_bits(PRST1, resets);
        if (ret)
                return ret;
 
        /* small delay for the pulse */
        udelay(10);
 
-       ret = boco_set_bits(PRST1, BRIDGE_RST);
+       ret = boco_set_bits(PRST1, resets);
        if (ret)
                return ret;
 
        return 0;
 }
+#endif
 
 /* the FPGA was configured, we configure the BOCO2 so that the EEPROM
  * is available from the Bobcat SPI bus */
@@ -248,4 +250,3 @@ int toggle_eeprom_spi_bus(void)
 
        return 0;
 }
-