pci: renesas: Make map address and mask power of two on Gen3
Both the map address and mask must be power of two per documentation,
adjust the code accordingly.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/pci/pci-rcar-gen3.c b/drivers/pci/pci-rcar-gen3.c
index cd116a5..6b08409 100644
--- a/drivers/pci/pci-rcar-gen3.c
+++ b/drivers/pci/pci-rcar-gen3.c
@@ -23,6 +23,7 @@
#include <pci.h>
#include <wait_bit.h>
#include <linux/bitops.h>
+#include <linux/log2.h>
#define PCIECAR 0x000010
#define PCIECCTLR 0x000018
@@ -347,10 +348,12 @@
if (hose->regions[i].phys_start == 0)
continue;
- mask = (hose->regions[i].size - 1) & ~0xf;
+ mask = (roundup_pow_of_two(hose->regions[i].size) - 1) & ~0xf;
mask |= LAR_ENABLE;
- writel(hose->regions[i].phys_start, priv->regs + PCIEPRAR(0));
- writel(hose->regions[i].phys_start, priv->regs + PCIELAR(0));
+ writel(rounddown_pow_of_two(hose->regions[i].phys_start),
+ priv->regs + PCIEPRAR(0));
+ writel(rounddown_pow_of_two(hose->regions[i].phys_start),
+ priv->regs + PCIELAR(0));
writel(mask, priv->regs + PCIELAMR(0));
break;
}