[PATCH 08/11] simplify ich_set_bbar

[Stefan Tauner]

~10 lines less, documenting better what the differences are (i.e. offset of BBAR only).

Signed-off-by: Stefan Tauner 
---
 ichspi.c |   49 ++++++++++++++++++++-----------------------------
 1 files changed, 20 insertions(+), 29 deletions(-)

diff --git a/ichspi.c b/ichspi.c
index d8df898..fd983ce 100644
--- a/ichspi.c
+++ b/ichspi.c
@@ -549,45 +549,36 @@ static int program_opcodes(OPCODES *op, int enable_undo)
  * Try to set BBAR (BIOS Base Address Register), but read back the value in case
  * it didn't stick.
  */
-void ich_set_bbar(uint32_t minaddr)
+void ich_set_bbar(uint32_t min_addr)
 {
-	minaddr &= BBAR_MASK;
+	void *bbar_addr;
    switch (spi_programmer->type) {
    case SPI_CONTROLLER_ICH7:
    case SPI_CONTROLLER_VIA:
-		ichspi_bbar = mmio_readl(ich_spibar + 0x50) & ~BBAR_MASK;
-		if (ichspi_bbar) {
-			msg_pdbg("Reserved bits in BBAR not zero: 0x%04x",
-				 ichspi_bbar);
-		}
-		ichspi_bbar |= minaddr;
-		rmmio_writel(ichspi_bbar, ich_spibar + 0x50);
-		ichspi_bbar = mmio_readl(ich_spibar + 0x50);
-		/* We don't have any option except complaining. And if the write
-		 * failed, the restore will fail as well, so no problem there.
-		 */
-		if (ichspi_bbar != minaddr)
-			msg_perr("Setting BBAR failed!\n");
+		bbar_addr = ich_spibar + 0x50;
    	break;
    case SPI_CONTROLLER_ICH9:
-		ichspi_bbar = mmio_readl(ich_spibar + ICH9_REG_BBAR) & ~BBAR_MASK;
-		if (ichspi_bbar) {
-			msg_pdbg("Reserved bits in BBAR not zero: 0x%04x",
-				 ichspi_bbar);
-		}
-		ichspi_bbar |= minaddr;
-		rmmio_writel(ichspi_bbar, ich_spibar + ICH9_REG_BBAR);
-		ichspi_bbar = mmio_readl(ich_spibar + ICH9_REG_BBAR);
-		/* We don't have any option except complaining. And if the write
-		 * failed, the restore will fail as well, so no problem there.
-		 */
-		if (ichspi_bbar != minaddr)
-			msg_perr("Setting BBAR failed!\n");
+		bbar_addr = ich_spibar + ICH9_REG_BBAR;
    	break;
    default:
    	msg_perr("Unknown chipset for BBAR setting!\n");
-		break;
+		return;
+	}
+	if (ichspi_bbar) {
+		msg_pdbg("Reserved bits in BBAR not zero: 0x%04x",
+			 ichspi_bbar);
    }
+
+	min_addr &= BBAR_MASK;
+	ichspi_bbar |= min_addr;
+	rmmio_writel(ichspi_bbar, bbar_addr);
+	ichspi_bbar = mmio_readl(bbar_addr);
+
+	/* We don't have any option except complaining. And if the write
+	 * failed, the restore will fail as well, so no problem there.
+	 */
+	if (ichspi_bbar != min_addr)
+		msg_perr("Setting BBAR failed!\n");
 }

/* This function generates OPCODES from or programs OPCODES to ICH according to