Merge tag 'arm-drivers-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "A couple of subsystems have their own subsystem maintainers but choose
  to have the code merged through the soc tree as upstream, as the code
  tends to be used across multiple SoCs or has SoC specific drivers
  itself:

   - memory controllers:

     Krzysztof Kozlowski takes ownership of the drivers/memory subsystem
     and its drivers, starting out with a set of cleanup patches.

     A larger driver for the Tegra memory controller that was
     accidentally missed for v5.8 is now added.

   - reset controllers:

     Only minor updates to drivers/reset this time

   - firmware:

     The "turris mox" firmware driver gains support for signed firmware
     blobs The tegra firmware driver gets extended to export some debug
     information Various updates to i.MX firmware drivers, mostly
     cosmetic

   - ARM SCMI/SCPI:

     A new mechanism for platform notifications is added, among a number
     of minor changes.

   - optee:

     Probing of the TEE bus is rewritten to better support detection of
     devices that depend on the tee-supplicant user space. A new
     firmware based trusted platform module (fTPM) driver is added based
     on OP-TEE

   - SoC attributes:

     A new driver is added to provide a generic soc_device for
     identifying a machine through the SMCCC ARCH_SOC_ID firmware
     interface rather than by probing SoC family specific registers.

     The series also contains some cleanups to the common soc_device
     code.

  There are also a number of updates to SoC specific drivers, the main
  ones are:

   - Mediatek cmdq driver gains a few in-kernel interfaces

   - Minor updates to Qualcomm RPMh, socinfo, rpm drivers, mostly adding
     support for additional SoC variants

   - The Qualcomm GENI core code gains interconnect path voting and
     performance level support, and integrating this into a number of
     device drivers.

   - A new driver for Samsung Exynos5800 voltage coupler for

   - Renesas RZ/G2H (R8A774E1) SoC support gets added to a couple of SoC
     specific device drivers

   - Updates to the TI K3 Ring Accelerator driver"

* tag 'arm-drivers-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (164 commits)
  soc: qcom: geni: Fix unused label warning
  soc: qcom: smd-rpm: Fix kerneldoc
  memory: jz4780_nemc: Only request IO memory the driver will use
  soc: qcom: pdr: Reorder the PD state indication ack
  MAINTAINERS: Add Git repository for memory controller drivers
  memory: brcmstb_dpfe: Fix language typo
  memory: samsung: exynos5422-dmc: Correct white space issues
  memory: samsung: exynos-srom: Correct alignment
  memory: pl172: Enclose macro argument usage in parenthesis
  memory: of: Correct kerneldoc
  memory: omap-gpmc: Fix language typo
  memory: omap-gpmc: Correct white space issues
  memory: omap-gpmc: Use 'unsigned int' for consistency
  memory: omap-gpmc: Enclose macro argument usage in parenthesis
  memory: omap-gpmc: Correct kerneldoc
  memory: mvebu-devbus: Align with open parenthesis
  memory: mvebu-devbus: Add missing braces to all arms of if statement
  memory: bt1-l2-ctl: Add blank lines after declarations
  soc: TI knav_qmss: make symbol 'knav_acc_range_ops' static
  firmware: ti_sci: Replace HTTP links with HTTPS ones
  ...

3 files changed, 28 insertions, 16 deletions

diff --git a/drivers/memory/samsung/Kconfig b/drivers/memory/samsung/Kconfig
index 20a8406ce786..8e240f078afc 100644
--- a/drivers/memory/samsung/Kconfig
+++ b/drivers/memory/samsung/Kconfig
@@ -23,5 +23,12 @@ config EXYNOS5422_DMC
 config EXYNOS_SROM
 	bool "Exynos SROM controller driver" if COMPILE_TEST
 	depends on (ARM && ARCH_EXYNOS) || (COMPILE_TEST && HAS_IOMEM)
+	help
+	  This adds driver for Samsung Exynos SoC SROM controller.  The driver
+	  in basic operation mode only saves and restores SROM registers
+	  during suspend.  If however appropriate device tree configuration
+	  is provided, the driver enables support for external memory
+	  or external devices.
+	  If unsure, say Y on devices with Samsung Exynos SocS.
 
 endif
diff --git a/drivers/memory/samsung/exynos-srom.c b/drivers/memory/samsung/exynos-srom.c
index 6510d7bab217..e73dd330af47 100644
--- a/drivers/memory/samsung/exynos-srom.c
+++ b/drivers/memory/samsung/exynos-srom.c
@@ -47,9 +47,9 @@ struct exynos_srom {
 	struct exynos_srom_reg_dump *reg_offset;
 };
 
-static struct exynos_srom_reg_dump *exynos_srom_alloc_reg_dump(
-		const unsigned long *rdump,
-		unsigned long nr_rdump)
+static struct exynos_srom_reg_dump *
+exynos_srom_alloc_reg_dump(const unsigned long *rdump,
+			   unsigned long nr_rdump)
 {
 	struct exynos_srom_reg_dump *rd;
 	unsigned int i;
@@ -116,7 +116,7 @@ static int exynos_srom_probe(struct platform_device *pdev)
 	}
 
 	srom = devm_kzalloc(&pdev->dev,
-			sizeof(struct exynos_srom), GFP_KERNEL);
+			    sizeof(struct exynos_srom), GFP_KERNEL);
 	if (!srom)
 		return -ENOMEM;
 
@@ -130,7 +130,7 @@ static int exynos_srom_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, srom);
 
 	srom->reg_offset = exynos_srom_alloc_reg_dump(exynos_srom_offsets,
-			ARRAY_SIZE(exynos_srom_offsets));
+						      ARRAY_SIZE(exynos_srom_offsets));
 	if (!srom->reg_offset) {
 		iounmap(srom->reg_base);
 		return -ENOMEM;
@@ -157,16 +157,16 @@ static int exynos_srom_probe(struct platform_device *pdev)
 
 #ifdef CONFIG_PM_SLEEP
 static void exynos_srom_save(void __iomem *base,
-				    struct exynos_srom_reg_dump *rd,
-				    unsigned int num_regs)
+			     struct exynos_srom_reg_dump *rd,
+			     unsigned int num_regs)
 {
 	for (; num_regs > 0; --num_regs, ++rd)
 		rd->value = readl(base + rd->offset);
 }
 
 static void exynos_srom_restore(void __iomem *base,
-				      const struct exynos_srom_reg_dump *rd,
-				      unsigned int num_regs)
+				const struct exynos_srom_reg_dump *rd,
+				unsigned int num_regs)
 {
 	for (; num_regs > 0; --num_regs, ++rd)
 		writel(rd->value, base + rd->offset);
@@ -177,7 +177,7 @@ static int exynos_srom_suspend(struct device *dev)
 	struct exynos_srom *srom = dev_get_drvdata(dev);
 
 	exynos_srom_save(srom->reg_base, srom->reg_offset,
-				ARRAY_SIZE(exynos_srom_offsets));
+			 ARRAY_SIZE(exynos_srom_offsets));
 	return 0;
 }
 
@@ -186,7 +186,7 @@ static int exynos_srom_resume(struct device *dev)
 	struct exynos_srom *srom = dev_get_drvdata(dev);
 
 	exynos_srom_restore(srom->reg_base, srom->reg_offset,
-				ARRAY_SIZE(exynos_srom_offsets));
+			    ARRAY_SIZE(exynos_srom_offsets));
 	return 0;
 }
 #endif
diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c
index 25196d6268e2..4312233e8e0a 100644
--- a/drivers/memory/samsung/exynos5422-dmc.c
+++ b/drivers/memory/samsung/exynos5422-dmc.c
@@ -270,12 +270,14 @@ static int find_target_freq_idx(struct exynos5_dmc *dmc,
  * This function switches between these banks according to the
  * currently used clock source.
  */
-static void exynos5_switch_timing_regs(struct exynos5_dmc *dmc, bool set)
+static int exynos5_switch_timing_regs(struct exynos5_dmc *dmc, bool set)
 {
 	unsigned int reg;
 	int ret;
 
 	ret = regmap_read(dmc->clk_regmap, CDREX_LPDDR3PHY_CON3, &reg);
+	if (ret)
+		return ret;
 
 	if (set)
 		reg |= EXYNOS5_TIMING_SET_SWI;
@@ -283,6 +285,8 @@ static void exynos5_switch_timing_regs(struct exynos5_dmc *dmc, bool set)
 		reg &= ~EXYNOS5_TIMING_SET_SWI;
 
 	regmap_write(dmc->clk_regmap, CDREX_LPDDR3PHY_CON3, reg);
+
+	return 0;
 }
 
 /**
@@ -516,7 +520,7 @@ exynos5_dmc_switch_to_bypass_configuration(struct exynos5_dmc *dmc,
 	/*
 	 * Delays are long enough, so use them for the new coming clock.
 	 */
-	exynos5_switch_timing_regs(dmc, USE_MX_MSPLL_TIMINGS);
+	ret = exynos5_switch_timing_regs(dmc, USE_MX_MSPLL_TIMINGS);
 
 	return ret;
 }
@@ -577,7 +581,9 @@ exynos5_dmc_change_freq_and_volt(struct exynos5_dmc *dmc,
 
 	clk_set_rate(dmc->fout_bpll, target_rate);
 
-	exynos5_switch_timing_regs(dmc, USE_BPLL_TIMINGS);
+	ret = exynos5_switch_timing_regs(dmc, USE_BPLL_TIMINGS);
+	if (ret)
+		goto disable_clocks;
 
 	ret = clk_set_parent(dmc->mout_mclk_cdrex, dmc->mout_bpll);
 	if (ret)
@@ -1392,7 +1398,7 @@ static int exynos5_dmc_probe(struct platform_device *pdev)
 		return PTR_ERR(dmc->base_drexi1);
 
 	dmc->clk_regmap = syscon_regmap_lookup_by_phandle(np,
-				"samsung,syscon-clk");
+							  "samsung,syscon-clk");
 	if (IS_ERR(dmc->clk_regmap))
 		return PTR_ERR(dmc->clk_regmap);
 
@@ -1471,7 +1477,6 @@ static int exynos5_dmc_probe(struct platform_device *pdev)
 		exynos5_dmc_df_profile.polling_ms = 500;
 	}
 
-
 	dmc->df = devm_devfreq_add_device(dev, &exynos5_dmc_df_profile,
 					  DEVFREQ_GOV_SIMPLE_ONDEMAND,
 					  &dmc->gov_data);