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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0217-soc-bcm-bcm2835-pm-Add-support-for-2711.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0217-soc-bcm-bcm2835-pm-Add-support-for-2711.patch102
1 files changed, 102 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0217-soc-bcm-bcm2835-pm-Add-support-for-2711.patch b/target/linux/bcm27xx/patches-5.4/950-0217-soc-bcm-bcm2835-pm-Add-support-for-2711.patch
new file mode 100644
index 0000000000..61bf911f28
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0217-soc-bcm-bcm2835-pm-Add-support-for-2711.patch
@@ -0,0 +1,102 @@
+From 0cb69292622e3530a72d3173d78c484c8f4d3eab Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Fri, 11 Jan 2019 17:31:07 -0800
+Subject: [PATCH] soc: bcm: bcm2835-pm: Add support for 2711.
+
+Without the actual power management part any more, there's a lot less
+to set up for V3D. We just need to clear the RSTN field for the power
+domain, and expose the reset controller for toggling it again.
+
+This is definitely incomplete -- the old ISP and H264 is in the old
+bridge, but since we have no consumers of it I've just done the
+minimum to get V3D working.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/mfd/bcm2835-pm.c | 11 +++++++++++
+ drivers/soc/bcm/bcm2835-power.c | 22 ++++++++++++++++++++++
+ include/linux/mfd/bcm2835-pm.h | 1 +
+ 3 files changed, 34 insertions(+)
+
+--- a/drivers/mfd/bcm2835-pm.c
++++ b/drivers/mfd/bcm2835-pm.c
+@@ -50,6 +50,17 @@ static int bcm2835_pm_probe(struct platf
+ if (ret)
+ return ret;
+
++ /* Map the ARGON ASB regs if present. */
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
++ if (res) {
++ pm->arg_asb = devm_ioremap_resource(dev, res);
++ if (IS_ERR(pm->arg_asb)) {
++ dev_err(dev, "Failed to map ARGON ASB: %ld\n",
++ PTR_ERR(pm->arg_asb));
++ return PTR_ERR(pm->arg_asb);
++ }
++ }
++
+ /* We'll use the presence of the AXI ASB regs in the
+ * bcm2835-pm binding as the key for whether we can reference
+ * the full PM register range and support power domains.
+--- a/drivers/soc/bcm/bcm2835-power.c
++++ b/drivers/soc/bcm/bcm2835-power.c
+@@ -143,6 +143,8 @@ struct bcm2835_power {
+ /* AXI Async bridge registers. */
+ void __iomem *asb;
+
++ bool is_2711;
++
+ struct genpd_onecell_data pd_xlate;
+ struct bcm2835_power_domain domains[BCM2835_POWER_DOMAIN_COUNT];
+ struct reset_controller_dev reset;
+@@ -192,6 +194,10 @@ static int bcm2835_power_power_off(struc
+ {
+ struct bcm2835_power *power = pd->power;
+
++ /* 2711 has no power domains above the reset controller. */
++ if (power->is_2711)
++ return 0;
++
+ /* Enable functional isolation */
+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC);
+
+@@ -213,6 +219,10 @@ static int bcm2835_power_power_on(struct
+ int inrush;
+ bool powok;
+
++ /* 2711 has no power domains above the reset controller. */
++ if (power->is_2711)
++ return 0;
++
+ /* If it was already powered on by the fw, leave it that way. */
+ if (PM_READ(pm_reg) & PM_POWUP)
+ return 0;
+@@ -627,6 +637,18 @@ static int bcm2835_power_probe(struct pl
+ power->base = pm->base;
+ power->asb = pm->asb;
+
++ /* 2711 hack: the new ARGON ASB took over V3D, which is our
++ * only consumer of this driver so far. The old ASB seems to
++ * still be present with ISP and H264 bits but no V3D, but I
++ * don't know if that's real or not. The V3D is in the same
++ * place in the new ASB as the old one, so just poke the new
++ * one for now.
++ */
++ if (pm->arg_asb) {
++ power->asb = pm->arg_asb;
++ power->is_2711 = true;
++ }
++
+ id = ASB_READ(ASB_AXI_BRDG_ID);
+ if (id != 0x62726467 /* "BRDG" */) {
+ dev_err(dev, "ASB register ID returned 0x%08x\n", id);
+--- a/include/linux/mfd/bcm2835-pm.h
++++ b/include/linux/mfd/bcm2835-pm.h
+@@ -9,6 +9,7 @@ struct bcm2835_pm {
+ struct device *dev;
+ void __iomem *base;
+ void __iomem *asb;
++ void __iomem *arg_asb;
+ };
+
+ #endif /* BCM2835_MFD_PM_H */