Merge tag 'arm-soc/for-4.15/drivers-part2' of http://github.com/Broadcom/stblinux into next/drivers
Pull "Broadcom drivers changes for 4.15 (part 2)" from Florian Fainelli:
This pull request contains Broadcom ARM/ARM64/MIPS SoCs changes for 4.15
(second part), please pull the following:
- Markus updates the Broadcom STB DPFE driver to avoid loading the firmware when
unnecessary to accomodate for specific platform restrictions
- Florian adds support for the Broadcom Hurricane 2 SoC iProc PLL clock needed
to get the proper CPU clock frequency
* tag 'arm-soc/for-4.15/drivers-part2' of http://github.com/Broadcom/stblinux:
clk: bcm: Add Broadcom Hurricane 2 clock support
memory: brcmstb: dpfe: skip downloading firmware when possible
memory: brcmstb: dpfe: introduce is_dcpu_enabled()
diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
index 1d9187d..4c4bd85 100644
--- a/drivers/clk/bcm/Kconfig
+++ b/drivers/clk/bcm/Kconfig
@@ -30,6 +30,15 @@
help
Enable common clock framework support for the Broadcom Cygnus SoC
+config CLK_BCM_HR2
+ bool "Broadcom Hurricane 2 clock support"
+ depends on ARCH_BCM_HR2 || COMPILE_TEST
+ select COMMON_CLK_IPROC
+ default ARCH_BCM_HR2
+ help
+ Enable common clock framework support for the Broadcom Hurricane 2
+ SoC
+
config CLK_BCM_NSP
bool "Broadcom Northstar/Northstar Plus clock support"
depends on ARCH_BCM_5301X || ARCH_BCM_NSP || COMPILE_TEST
diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile
index a0c14fa..7551441 100644
--- a/drivers/clk/bcm/Makefile
+++ b/drivers/clk/bcm/Makefile
@@ -8,6 +8,7 @@
obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835-aux.o
obj-$(CONFIG_ARCH_BCM_53573) += clk-bcm53573-ilp.o
obj-$(CONFIG_CLK_BCM_CYGNUS) += clk-cygnus.o
+obj-$(CONFIG_CLK_BCM_HR2) += clk-hr2.o
obj-$(CONFIG_CLK_BCM_NSP) += clk-nsp.o
obj-$(CONFIG_CLK_BCM_NS2) += clk-ns2.o
obj-$(CONFIG_CLK_BCM_SR) += clk-sr.o
diff --git a/drivers/clk/bcm/clk-hr2.c b/drivers/clk/bcm/clk-hr2.c
new file mode 100644
index 0000000..f7c5b73
--- /dev/null
+++ b/drivers/clk/bcm/clk-hr2.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2017 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include "clk-iproc.h"
+
+static void __init hr2_armpll_init(struct device_node *node)
+{
+ iproc_armpll_setup(node);
+}
+CLK_OF_DECLARE(hr2_armpll, "brcm,hr2-armpll", hr2_armpll_init);
diff --git a/drivers/memory/brcmstb_dpfe.c b/drivers/memory/brcmstb_dpfe.c
index 21242c4..0a7bdbe 100644
--- a/drivers/memory/brcmstb_dpfe.c
+++ b/drivers/memory/brcmstb_dpfe.c
@@ -202,17 +202,26 @@ static const u32 dpfe_commands[DPFE_CMD_MAX][MSG_FIELD_MAX] = {
},
};
+static bool is_dcpu_enabled(void __iomem *regs)
+{
+ u32 val;
+
+ val = readl_relaxed(regs + REG_DCPU_RESET);
+
+ return !(val & DCPU_RESET_MASK);
+}
+
static void __disable_dcpu(void __iomem *regs)
{
u32 val;
- /* Check if DCPU is running */
+ if (!is_dcpu_enabled(regs))
+ return;
+
+ /* Put DCPU in reset if it's running. */
val = readl_relaxed(regs + REG_DCPU_RESET);
- if (!(val & DCPU_RESET_MASK)) {
- /* Put DCPU in reset */
- val |= (1 << DCPU_RESET_SHIFT);
- writel_relaxed(val, regs + REG_DCPU_RESET);
- }
+ val |= (1 << DCPU_RESET_SHIFT);
+ writel_relaxed(val, regs + REG_DCPU_RESET);
}
static void __enable_dcpu(void __iomem *regs)
@@ -422,13 +431,25 @@ static int brcmstb_dpfe_download_firmware(struct platform_device *pdev,
const void *fw_blob;
int ret;
+ priv = platform_get_drvdata(pdev);
+
+ /*
+ * Skip downloading the firmware if the DCPU is already running and
+ * responding to commands.
+ */
+ if (is_dcpu_enabled(priv->regs)) {
+ u32 response[MSG_FIELD_MAX];
+
+ ret = __send_command(priv, DPFE_CMD_GET_INFO, response);
+ if (!ret)
+ return 0;
+ }
+
ret = request_firmware(&fw, FIRMWARE_NAME, dev);
/* request_firmware() prints its own error messages. */
if (ret)
return ret;
- priv = platform_get_drvdata(pdev);
-
ret = __verify_firmware(init, fw);
if (ret)
return -EFAULT;