From 9e224c8ff19e4c4a9c9272171d5a0169d5cb1bef Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Fri, 11 Apr 2014 11:21:47 -0500 Subject: [PATCH] bus: omap_l3_noc: switch over to relaxed variants of readl/writel Currently we use __raw_readl and writel in this driver. Considering there is no specific need for a memory barrier, replacing writel with endian-neutral writel_relaxed and replacing __raw_readls with the corresponding endian-neutral readl_relaxed allows us to have a standard set of register operations for the driver. While at it, simplify address computation using variables for register. Signed-off-by: Nishanth Menon Acked-by: Santosh Shilimkar Acked-by: Felipe Balbi Acked-by: Peter Ujfalusi Tested-by: Darren Etheridge Tested-by: Sekhar Nori --- drivers/bus/omap_l3_noc.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c index 37d71b715053..c8facb00bb53 100644 --- a/drivers/bus/omap_l3_noc.c +++ b/drivers/bus/omap_l3_noc.c @@ -55,6 +55,7 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3) int err_src = 0; u32 std_err_main, err_reg, clear, masterid; void __iomem *base, *l3_targ_base; + void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr; char *target_name, *master_name = "UN IDENTIFIED"; /* Get the Type of interrupt */ @@ -66,8 +67,8 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3) * to determine the source */ base = l3->l3_base[i]; - err_reg = __raw_readl(base + l3_flagmux[i] + - + L3_FLAGMUX_REGERR0 + (inttype << 3)); + err_reg = readl_relaxed(base + l3_flagmux[i] + + L3_FLAGMUX_REGERR0 + (inttype << 3)); /* Get the corresponding error and analyse */ if (err_reg) { @@ -76,10 +77,14 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3) /* Read the stderrlog_main_source from clk domain */ l3_targ_base = base + *(l3_targ[i] + err_src); - std_err_main = __raw_readl(l3_targ_base + - L3_TARG_STDERRLOG_MAIN); - masterid = __raw_readl(l3_targ_base + - L3_TARG_STDERRLOG_MSTADDR); + l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN; + l3_targ_slvofslsb = l3_targ_base + + L3_TARG_STDERRLOG_SLVOFSLSB; + l3_targ_mstaddr = l3_targ_base + + L3_TARG_STDERRLOG_MSTADDR; + + std_err_main = readl_relaxed(l3_targ_stderr); + masterid = readl_relaxed(l3_targ_mstaddr); switch (std_err_main & CUSTOM_ERROR) { case STANDARD_ERROR: @@ -87,12 +92,10 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3) l3_targ_inst_name[i][err_src]; WARN(true, "L3 standard error: TARGET:%s at address 0x%x\n", target_name, - __raw_readl(l3_targ_base + - L3_TARG_STDERRLOG_SLVOFSLSB)); + readl_relaxed(l3_targ_slvofslsb)); /* clear the std error log*/ clear = std_err_main | CLEAR_STDERR_LOG; - writel(clear, l3_targ_base + - L3_TARG_STDERRLOG_MAIN); + writel_relaxed(clear, l3_targ_stderr); break; case CUSTOM_ERROR: @@ -107,8 +110,7 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3) master_name, target_name); /* clear the std error log*/ clear = std_err_main | CLEAR_STDERR_LOG; - writel(clear, l3_targ_base + - L3_TARG_STDERRLOG_MAIN); + writel_relaxed(clear, l3_targ_stderr); break; default: