ddr: altera: sdram: Clean up set_sdr_addr_rw()

Get rid of the constant clrsetbits_le32(), instead prepare the whole
content of the register once and write it at the end of the function.

Signed-off-by: Marek Vasut <marex@denx.de>

diff --git a/drivers/ddr/altera/sdram.c b/drivers/ddr/altera/sdram.c
index f4f3545dad526473abad33e5d15f36f16ccc5fde..143f41b11d67976a5749f3427af2595dc152a6d2 100644 (file)
--- a/drivers/ddr/altera/sdram.c
+++ b/drivers/ddr/altera/sdram.c
@@ -371,34 +371,24 @@ static void set_sdr_dram_timing(void)
 
 static void set_sdr_addr_rw(void)
 {
-       int rows;
-
-       debug("Configuring DRAMADDRW\n");
-       clrsetbits_le32(&sdr_ctrl->dram_addrw, SDR_CTRLGRP_DRAMADDRW_COLBITS_MASK,
-                       CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_COLBITS <<
-                       SDR_CTRLGRP_DRAMADDRW_COLBITS_LSB);
        /*
         * SDRAM Failure When Accessing Non-Existent Memory
-        * Update Preloader to artificially increase the number of rows so
-        * that the memory thinks it has 4GB of RAM.
-        */
-       rows = get_errata_rows();
-
-       clrsetbits_le32(&sdr_ctrl->dram_addrw, SDR_CTRLGRP_DRAMADDRW_ROWBITS_MASK,
-                       rows << SDR_CTRLGRP_DRAMADDRW_ROWBITS_LSB);
-
-       clrsetbits_le32(&sdr_ctrl->dram_addrw, SDR_CTRLGRP_DRAMADDRW_BANKBITS_MASK,
-                       CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_BANKBITS <<
-                       SDR_CTRLGRP_DRAMADDRW_BANKBITS_LSB);
-       /* SDRAM Failure When Accessing Non-Existent Memory
         * Set SDR_CTRLGRP_DRAMADDRW_CSBITS_LSB to
         * log2(number of chip select bits). Since there's only
         * 1 or 2 chip selects, log2(1) => 0, and log2(2) => 1,
         * which is the same as "chip selects" - 1.
         */
-       clrsetbits_le32(&sdr_ctrl->dram_addrw, SDR_CTRLGRP_DRAMADDRW_CSBITS_MASK,
-                       (CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_CSBITS - 1) <<
+       const int rows = get_errata_rows();
+       const u32 dram_addrw =
+               (CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_COLBITS <<
+                       SDR_CTRLGRP_DRAMADDRW_COLBITS_LSB)      |
+               (rows << SDR_CTRLGRP_DRAMADDRW_ROWBITS_LSB)     |
+               (CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_BANKBITS <<
+                       SDR_CTRLGRP_DRAMADDRW_BANKBITS_LSB)     |
+               ((CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_CSBITS - 1) <<
                        SDR_CTRLGRP_DRAMADDRW_CSBITS_LSB);
+       debug("Configuring DRAMADDRW\n");
+       writel(dram_addrw, &sdr_ctrl->dram_addrw);
 }
 
 static void set_sdr_static_cfg(void)