ARM: SoC fixes for 4.19

Two last minute bugfixes, both for NXP platforms:
 
 * The Layerscape 'qbman' infrastructure suffers from probe ordering
   bugs in some configurations, a two-patch series adds a hotfix for
   this. 4.20 will have a longer set of patches to rework it.
 
 * The old imx53-qsb board regressed in 4.19 after the addition
   of cpufreq support, adding a set of explicit operating points
   fixes this.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJbwLz1AAoJEGCrR//JCVInfygP/2U3Uqt3Tr2QRROx4wIl0gGh
 +sE5gfjBSrXPXq8SoLrJOOgxHYQwbAoWO93rYcmgjhn5a14YZuJzK9cgKiHaHOIc
 fbkqjGrJ8Bbmy6gRCKrEVCvF8W6qV4pAwh/VT+HFaKDJK6pblvJEOysAAzFEbAP+
 3fOxJcjKh5KaDrvWS/Y/wVBd5BUfpIpPWksWBaRONIfaO24gGs5Bp+OfVS/u2Ccz
 iml59Pgg3KsaBr5u6PQSgZDfJ1CX4mMdJS0yLlqCdh+LdHduCWomH15OLIxiCEty
 8hrDeSleMRW7MzIhbnxvGgkKGE3wa5yPr5ABMB6DR6wcWuI0V1K5TDr0GP4x53yK
 li4+rFGVgenIkGqtFEogYerfbH7jLp3noC/7SYKPsT4wkSSoXegFgOw+tV9DPmVf
 6CZbNP98HCNlPyu/pxizHv9PHPKOVmzO7k32Afens35/7/2oPrbeNnXbBRBaKbFF
 2oUUNyHER6DOuELsXcMZGLeJpp5lwRa7+0/6pKOFvqkirbJji7N1o7EBNMG2ZL82
 OiDXK4SKip9TWDfZ7ueKV8TznYnGlWmiGc1az1wrsOctB8Sk2tqxl7UADFOYM/5L
 KBwDw9SVttRWfbKTBhEiaFIyHLY+X6JPSbEqbXU7HL/MNW9JlGVwZzFHtaq/AaYL
 yPNvMgg7GFfGpEk8pQFV
 =WY74
 -----END PGP SIGNATURE-----

Merge tag 'armsoc-fixes-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Arnd writes:
  "ARM: SoC fixes for 4.19

   Two last minute bugfixes, both for NXP platforms:

   * The Layerscape 'qbman' infrastructure suffers from probe ordering
     bugs in some configurations, a two-patch series adds a hotfix for
     this. 4.20 will have a longer set of patches to rework it.

   * The old imx53-qsb board regressed in 4.19 after the addition
     of cpufreq support, adding a set of explicit operating points
     fixes this."

* tag 'armsoc-fixes-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  soc: fsl: qman_portals: defer probe after qman's probe
  soc: fsl: qbman: add APIs to retrieve the probing status
  ARM: dts: imx53-qsb: disable 1.2GHz OPP

arch/arm/boot/dts/imx53-qsb-common.dtsi

@@ -123,6 +123,17 @@
 	};
 };
 
+&cpu0 {
+	/* CPU rated to 1GHz, not 1.2GHz as per the default settings */
+	operating-points = <
+		/* kHz   uV */
+		166666  850000
+		400000  900000
+		800000  1050000
+		1000000 1200000
+	>;
+};
+
 &esdhc1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_esdhc1>;

drivers/soc/fsl/qbman/bman_ccsr.c

@@ -120,6 +120,7 @@ static void bm_set_memory(u64 ba, u32 size)
  */
 static dma_addr_t fbpr_a;
 static size_t fbpr_sz;
+static int __bman_probed;
 
 static int bman_fbpr(struct reserved_mem *rmem)
 {
@@ -166,6 +167,12 @@ static irqreturn_t bman_isr(int irq, void *ptr)
 	return IRQ_HANDLED;
 }
 
+int bman_is_probed(void)
+{
+	return __bman_probed;
+}
+EXPORT_SYMBOL_GPL(bman_is_probed);
+
 static int fsl_bman_probe(struct platform_device *pdev)
 {
 	int ret, err_irq;
@@ -175,6 +182,8 @@ static int fsl_bman_probe(struct platform_device *pdev)
 	u16 id, bm_pool_cnt;
 	u8 major, minor;
 
+	__bman_probed = -1;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n",
@@ -255,6 +264,8 @@ static int fsl_bman_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	__bman_probed = 1;
+
 	return 0;
 };
 

drivers/soc/fsl/qbman/qman_ccsr.c

@@ -273,6 +273,7 @@ static const struct qman_error_info_mdata error_mdata[] = {
 static u32 __iomem *qm_ccsr_start;
 /* A SDQCR mask comprising all the available/visible pool channels */
 static u32 qm_pools_sdqcr;
+static int __qman_probed;
 
 static inline u32 qm_ccsr_in(u32 offset)
 {
@@ -686,6 +687,12 @@ static int qman_resource_init(struct device *dev)
 	return 0;
 }
 
+int qman_is_probed(void)
+{
+	return __qman_probed;
+}
+EXPORT_SYMBOL_GPL(qman_is_probed);
+
 static int fsl_qman_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -695,6 +702,8 @@ static int fsl_qman_probe(struct platform_device *pdev)
 	u16 id;
 	u8 major, minor;
 
+	__qman_probed = -1;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n",
@@ -828,6 +837,8 @@ static int fsl_qman_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+	__qman_probed = 1;
+
 	return 0;
 }
 

drivers/soc/fsl/qbman/qman_portal.c

@@ -227,6 +227,14 @@ static int qman_portal_probe(struct platform_device *pdev)
 	int irq, cpu, err;
 	u32 val;
 
+	err = qman_is_probed();
+	if (!err)
+		return -EPROBE_DEFER;
+	if (err < 0) {
+		dev_err(&pdev->dev, "failing probe due to qman probe error\n");
+		return -ENODEV;
+	}
+
 	pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
 	if (!pcfg)
 		return -ENOMEM;

include/soc/fsl/bman.h

@@ -126,4 +126,12 @@ int bman_release(struct bman_pool *pool, const struct bm_buffer *bufs, u8 num);
  */
 int bman_acquire(struct bman_pool *pool, struct bm_buffer *bufs, u8 num);
 
+/**
+ * bman_is_probed - Check if bman is probed
+ *
+ * Returns 1 if the bman driver successfully probed, -1 if the bman driver
+ * failed to probe or 0 if the bman driver did not probed yet.
+ */
+int bman_is_probed(void);
+
 #endif	/* __FSL_BMAN_H */

include/soc/fsl/qman.h

@@ -1186,4 +1186,12 @@ int qman_alloc_cgrid_range(u32 *result, u32 count);
  */
 int qman_release_cgrid(u32 id);
 
+/**
+ * qman_is_probed - Check if qman is probed
+ *
+ * Returns 1 if the qman driver successfully probed, -1 if the qman driver
+ * failed to probe or 0 if the qman driver did not probed yet.
+ */
+int qman_is_probed(void);
+
 #endif	/* __FSL_QMAN_H */