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57 lines
1.6 KiB
57 lines
1.6 KiB
8 years ago
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From 5d7f8473e3472c16703bf5692d0b13f47d08c70a Mon Sep 17 00:00:00 2001
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From: Shaohui Xie <Shaohui.Xie@freescale.com>
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Date: Fri, 22 Jan 2016 12:01:28 +0800
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Subject: [PATCH 37/70] ls1043a: Add support for reset
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The reset in ls1043a is similar to ls2085a, but accessed in big endian,
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so we modify the existing driver to handle endianness, if driver probes
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property 'big-endian' in DTS, driver works in big endian mode,
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otherwise, driver works in little endian by default.
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Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
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---
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drivers/power/reset/ls-reboot.c | 18 +++++++++++++++---
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1 file changed, 15 insertions(+), 3 deletions(-)
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--- a/drivers/power/reset/ls-reboot.c
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+++ b/drivers/power/reset/ls-reboot.c
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@@ -28,6 +28,7 @@
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struct ls_reboot_priv {
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struct device *dev;
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u32 *rstcr;
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+ bool is_big_endian;
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};
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static struct ls_reboot_priv *ls_reboot_priv;
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@@ -39,9 +40,15 @@ static void ls_reboot(enum reboot_mode r
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unsigned long timeout;
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if (ls_reboot_priv) {
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- val = readl(priv->rstcr);
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- val |= 0x02;
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- writel(val, priv->rstcr);
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+ if (priv->is_big_endian) {
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+ val = ioread32be(priv->rstcr);
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+ val |= 0x02;
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+ iowrite32be(val, priv->rstcr);
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+ } else {
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+ val = readl(priv->rstcr);
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+ val |= 0x02;
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+ writel(val, priv->rstcr);
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+ }
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}
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timeout = jiffies + HZ;
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@@ -66,6 +73,11 @@ static int ls_reboot_probe(struct platfo
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return -ENODEV;
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}
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+ if (of_get_property(pdev->dev.of_node, "big-endian", NULL))
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+ ls_reboot_priv->is_big_endian = true;
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+ else
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+ ls_reboot_priv->is_big_endian = false;
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+
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ls_reboot_priv->dev = &pdev->dev;
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arm_pm_restart = ls_reboot;
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