[U-Boot] [PATCH 29/52] rockchip: rk3368: syscon: MSCH/PMUGRF/GRF support for OF_PLATDATA

Philipp Tomsich philipp.tomsich at theobroma-systems.com
Tue Jul 18 20:36:09 UTC 2017


The RK3368 has both a limited SPL size (just 0x7000 bytes) and the
added challenge of booting in AArch64, which increases the code size
for SPL (particularily when using the LP64 programming model).  For
this reason we expect the RK3368 to always use OF_PLATDATA for its
SPL stage.

This change adds support for the MSCH, PMUGRF and GRF register regions
in syscon, which are necessary for initialising the RK3368's DRAM
controller.

Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
---

 arch/arm/mach-rockchip/rk3368/syscon_rk3368.c | 35 +++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm/mach-rockchip/rk3368/syscon_rk3368.c b/arch/arm/mach-rockchip/rk3368/syscon_rk3368.c
index 03e97eb..90a993e 100644
--- a/arch/arm/mach-rockchip/rk3368/syscon_rk3368.c
+++ b/arch/arm/mach-rockchip/rk3368/syscon_rk3368.c
@@ -1,6 +1,8 @@
 /*
  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
  * Author: Andy Yan <andy.yan at rock-chips.com>
+ * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
+ *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
@@ -14,6 +16,8 @@ static const struct udevice_id rk3368_syscon_ids[] = {
 	  .data = ROCKCHIP_SYSCON_GRF },
 	{ .compatible = "rockchip,rk3368-pmugrf",
 	  .data = ROCKCHIP_SYSCON_PMUGRF },
+	{ .compatible = "rockchip,rk3368-msch",
+	  .data = ROCKCHIP_SYSCON_MSCH },
 	{ }
 };
 
@@ -22,3 +26,34 @@ U_BOOT_DRIVER(syscon_rk3368) = {
 	.id = UCLASS_SYSCON,
 	.of_match = rk3368_syscon_ids,
 };
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+static int rk3368_syscon_bind_of_platdata(struct udevice *dev)
+{
+	dev->driver_data = dev->driver->of_match->data;
+	debug("syscon: %s %d\n", dev->name, (uint)dev->driver_data);
+
+	return 0;
+}
+
+U_BOOT_DRIVER(rockchip_rk3368_grf) = {
+	.name = "rockchip_rk3368_grf",
+	.id = UCLASS_SYSCON,
+	.of_match = rk3368_syscon_ids,
+	.bind = rk3368_syscon_bind_of_platdata,
+};
+
+U_BOOT_DRIVER(rockchip_rk3368_pmugrf) = {
+	.name = "rockchip_rk3368_pmugrf",
+	.id = UCLASS_SYSCON,
+	.of_match = rk3368_syscon_ids + 1,
+	.bind = rk3368_syscon_bind_of_platdata,
+};
+
+U_BOOT_DRIVER(rockchip_rk3368_msch) = {
+	.name = "rockchip_rk3368_msch",
+	.id = UCLASS_SYSCON,
+	.of_match = rk3368_syscon_ids + 2,
+	.bind = rk3368_syscon_bind_of_platdata,
+};
+#endif
-- 
2.1.4



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