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authorJulius Werner <jwerner@chromium.org>2014-09-10 19:37:15 -0700
committerPatrick Georgi <pgeorgi@google.com>2015-03-24 15:27:18 +0100
commit7a757c942e74743ac5781ce03db671747b6f542b (patch)
treebbd287f9aaf7c1682f87f9eb206099ab00548efe /src/soc/rockchip/rk3288/rk808.c
parent72001e79e9856488d38c0cb176820a70fbd5578e (diff)
veyron_pinky: Move PMIC driver into SoC directory
The Rk808 PMIC is a part that will probably be used by most Rk3288 boards, so it makes sense to keep it as common code in the the SoC directory. This patch puts LDO control functions into rk3288/rk808.c, so that the mainboard only has to call a simple interface to set up the specific LDOs it requires. BUG=chrome-os-partner:30167 TEST=Booted both this and the old version with a stubbed-out i2c_writeb(), ensured that the final values are the same. Change-Id: I7efa60f8a357ce6be7490e64d2e0e3f72ad16f1c Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 4df22cd78ee04fefc6f7fa0e5c3d903eb1794422 Original-Change-Id: Ic172f9c402e829995f049726d3cb6dbd637039d1 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/217598 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/8871 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/soc/rockchip/rk3288/rk808.c')
-rw-r--r--src/soc/rockchip/rk3288/rk808.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3288/rk808.c b/src/soc/rockchip/rk3288/rk808.c
new file mode 100644
index 0000000000..0d629ca041
--- /dev/null
+++ b/src/soc/rockchip/rk3288/rk808.c
@@ -0,0 +1,66 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Rockchip Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <assert.h>
+#include <console/console.h>
+#include <device/i2c.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "rk808.h"
+
+#define RK808_ADDR 0x1b
+
+#define LDO_EN 0x24
+#define LDO_ONSEL(i) (0x39 + 2 * i)
+#define LDO_SLPSEL(i) (0x3a + 2 * i)
+
+static void rk808_clrsetbits(uint8_t bus, uint8_t reg, uint8_t clr, uint8_t set)
+{
+ uint8_t value;
+
+ if (i2c_readb(bus, RK808_ADDR, reg, &value) ||
+ i2c_writeb(bus, RK808_ADDR, reg, (value & ~clr) | set))
+ printk(BIOS_ERR, "ERROR: Cannot set Rk808[%#x]!\n", reg);
+}
+
+void rk808_configure_ldo(uint8_t bus, int ldo, int millivolts)
+{
+ uint8_t vsel;
+
+ switch (ldo) {
+ case 1:
+ case 2:
+ case 4:
+ case 5:
+ case 8:
+ vsel = millivolts / 100 - 18;
+ break;
+ case 3:
+ case 6:
+ case 7:
+ vsel = millivolts / 100 - 8;
+ break;
+ default:
+ die("Unknown LDO index!");
+ }
+ assert(vsel <= 0x10);
+
+ rk808_clrsetbits(bus, LDO_ONSEL(ldo), 0x1f, vsel);
+ rk808_clrsetbits(bus, LDO_EN, 0, 1 << (ldo - 1));
+}