From f450f28e70a2378d9d6ded0932fe480055888cfa Mon Sep 17 00:00:00 2001 From: Dinh Nguyen Date: Fri, 22 Sep 2017 13:42:47 -0500 Subject: [PATCH] reset: socfpga: fix for 64-bit compilation The SoCFPGA Stratix10 reset controller has 32-bit registers. Thus, we cannot use BITS_PER_LONG in computing the register and bit offset. Instead, we should be using the width of the hardware register for the calculation. Signed-off-by: Dinh Nguyen Signed-off-by: Philipp Zabel --- drivers/reset/reset-socfpga.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c index c60904ff40b8..3907bbc9c6cf 100644 --- a/drivers/reset/reset-socfpga.c +++ b/drivers/reset/reset-socfpga.c @@ -40,8 +40,9 @@ static int socfpga_reset_assert(struct reset_controller_dev *rcdev, struct socfpga_reset_data *data = container_of(rcdev, struct socfpga_reset_data, rcdev); - int bank = id / BITS_PER_LONG; - int offset = id % BITS_PER_LONG; + int reg_width = sizeof(u32); + int bank = id / (reg_width * BITS_PER_BYTE); + int offset = id % (reg_width * BITS_PER_BYTE); unsigned long flags; u32 reg; @@ -61,8 +62,9 @@ static int socfpga_reset_deassert(struct reset_controller_dev *rcdev, struct socfpga_reset_data, rcdev); - int bank = id / BITS_PER_LONG; - int offset = id % BITS_PER_LONG; + int reg_width = sizeof(u32); + int bank = id / (reg_width * BITS_PER_BYTE); + int offset = id % (reg_width * BITS_PER_BYTE); unsigned long flags; u32 reg; @@ -81,8 +83,9 @@ static int socfpga_reset_status(struct reset_controller_dev *rcdev, { struct socfpga_reset_data *data = container_of(rcdev, struct socfpga_reset_data, rcdev); - int bank = id / BITS_PER_LONG; - int offset = id % BITS_PER_LONG; + int reg_width = sizeof(u32); + int bank = id / (reg_width * BITS_PER_BYTE); + int offset = id % (reg_width * BITS_PER_BYTE); u32 reg; reg = readl(data->membase + (bank * BANK_INCREMENT)); @@ -132,7 +135,7 @@ static int socfpga_reset_probe(struct platform_device *pdev) spin_lock_init(&data->lock); data->rcdev.owner = THIS_MODULE; - data->rcdev.nr_resets = NR_BANKS * BITS_PER_LONG; + data->rcdev.nr_resets = NR_BANKS * (sizeof(u32) * BITS_PER_BYTE); data->rcdev.ops = &socfpga_reset_ops; data->rcdev.of_node = pdev->dev.of_node; -- 2.20.1