1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/spi/imx_spi_pmic.c b/drivers/spi/imx_spi_pmic.c
new file mode 100644
index 0000000..bce42c2
--- /dev/null
+++ b/drivers/spi/imx_spi_pmic.c
@@ -0,0 +1,127 @@
+/*
+ * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <spi.h>
+#include <asm/errno.h>
+#include <linux/types.h>
+
+#include <asm/arch/imx_spi.h>
+
+static u32 pmic_tx, pmic_rx;
+
+/*!
+ * To read/write to a PMIC register. For write, it does another read for the
+ * actual register value.
+ *
+ * @param	reg			register number inside the PMIC
+ * @param	val			data to be written to the register; don't care for read
+ * @param	write		0 for read; 1 for write
+ *
+ * @return				the actual data in the PMIC register
+ */
+u32 pmic_reg(struct spi_slave *slave, u32 reg, u32 val, u32 write)
+{
+	if (!slave)
+		return 0;
+
+	if (reg > 63 || write > 1) {
+		printf("<reg num> = %d is invalide. Should be less then 63\n",
+			reg);
+		return 0;
+	}
+	pmic_tx = (write << 31) | (reg << 25) | (val & 0x00FFFFFF);
+	printf("reg=0x%x, val=0x%08x\n", reg, pmic_tx);
+
+	spi_xfer(slave, 4 << 3, (u8 *)&pmic_tx,
+				  (u8 *)&pmic_rx, 0);
+
+	if (write) {
+		pmic_tx &= ~(1 << 31);
+		spi_xfer(slave, 4 << 3,
+			(u8 *)&pmic_tx, (u8 *)&pmic_rx, 0);
+	}
+
+	return pmic_rx;
+}
+
+void show_pmic_info(struct spi_slave *slave)
+{
+	volatile u32 rev_id;
+
+	if (!slave)
+		return;
+
+	rev_id = pmic_reg(slave, 7, 0, 0);
+	printf("PMIC ID: 0x%08x [Rev: ", rev_id);
+	switch (rev_id & 0x1F) {
+	case 0x1:
+		printf("1.0");
+		break;
+	case 0x9:
+		printf("1.1");
+		break;
+	case 0xA:
+		printf("1.2");
+		break;
+	case 0x10:
+		printf("2.0");
+		break;
+	case 0x11:
+		printf("2.1");
+		break;
+	case 0x18:
+		printf("3.0");
+		break;
+	case 0x19:
+		printf("3.1");
+		break;
+	case 0x1A:
+		printf("3.2");
+		break;
+	case 0x2:
+		printf("3.2A");
+		break;
+	case 0x1B:
+		printf("3.3");
+		break;
+	case 0x1D:
+		printf("3.5");
+		break;
+	default:
+		printf("unknown");
+		break;
+	}
+	printf("]\n");
+}
+
+struct spi_slave *spi_pmic_probe()
+{
+	return spi_setup_slave(0, CONFIG_IMX_SPI_PMIC_CS, 2500000, 0);
+}
+
+void spi_pmic_free(struct spi_slave *slave)
+{
+	if (slave)
+		spi_free_slave(slave);
+}