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-rw-r--r--Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt8
-rw-r--r--Documentation/devicetree/bindings/bus/imx-weim.txt32
-rw-r--r--Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt3
-rw-r--r--drivers/bus/imx-weim.c70
-rw-r--r--drivers/firmware/imx/misc.c38
-rw-r--r--drivers/firmware/imx/scu-pd.c1
-rw-r--r--drivers/soc/imx/Kconfig2
-rw-r--r--drivers/soc/imx/gpcv2.c76
-rw-r--r--include/linux/firmware/imx/svc/misc.h3
9 files changed, 212 insertions, 21 deletions
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index 27784b6edfed..fd2bed23e0e3 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -58,7 +58,11 @@ This binding for the SCU power domain providers uses the generic power
domain binding[2].
Required properties:
-- compatible: Should be "fsl,imx8qxp-scu-pd".
+- compatible: Should be one of:
+ "fsl,imx8qm-scu-pd",
+ "fsl,imx8qxp-scu-pd"
+ followed by "fsl,scu-pd"
+
- #power-domain-cells: Must be 1. Contains the Resource ID used by
SCU commands.
See detailed Resource ID list from:
@@ -154,7 +158,7 @@ firmware {
};
pd: imx8qx-pd {
- compatible = "fsl,imx8qxp-scu-pd";
+ compatible = "fsl,imx8qxp-scu-pd", "fsl,scu-pd";
#power-domain-cells = <1>;
};
diff --git a/Documentation/devicetree/bindings/bus/imx-weim.txt b/Documentation/devicetree/bindings/bus/imx-weim.txt
index 683eaf3aed79..dda7d6d66479 100644
--- a/Documentation/devicetree/bindings/bus/imx-weim.txt
+++ b/Documentation/devicetree/bindings/bus/imx-weim.txt
@@ -47,9 +47,9 @@ Optional properties:
Timing property for child nodes. It is mandatory, not optional.
- fsl,weim-cs-timing: The timing array, contains timing values for the
- child node. We can get the CS index from the child
- node's "reg" property. The number of registers depends
- on the selected chip.
+ child node. We get the CS indexes from the address
+ ranges in the child node's "reg" property.
+ The number of registers depends on the selected chip:
For i.MX1, i.MX21 ("fsl,imx1-weim") there are two
registers: CSxU, CSxL.
For i.MX25, i.MX27, i.MX31 and i.MX35 ("fsl,imx27-weim")
@@ -80,3 +80,29 @@ Example for an imx6q-sabreauto board, the NOR flash connected to the WEIM:
0x0000c000 0x1404a38e 0x00000000>;
};
};
+
+Example for an imx6q-based board, a multi-chipselect device connected to WEIM:
+
+In this case, both chip select 0 and 1 will be configured with the same timing
+array values.
+
+ weim: weim@21b8000 {
+ compatible = "fsl,imx6q-weim";
+ reg = <0x021b8000 0x4000>;
+ clocks = <&clks 196>;
+ #address-cells = <2>;
+ #size-cells = <1>;
+ ranges = <0 0 0x08000000 0x02000000
+ 1 0 0x0a000000 0x02000000
+ 2 0 0x0c000000 0x02000000
+ 3 0 0x0e000000 0x02000000>;
+ fsl,weim-cs-gpr = <&gpr>;
+
+ acme@0 {
+ compatible = "acme,whatever";
+ reg = <0 0 0x100>, <0 0x400000 0x800>,
+ <1 0x400000 0x800>;
+ fsl,weim-cs-timing = <0x024400b1 0x00001010 0x20081100
+ 0x00000000 0xa0000240 0x00000000>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt
index 7c947a996df1..7c7e972aaa42 100644
--- a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt
+++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt
@@ -32,6 +32,9 @@ Required properties:
Optional properties:
- power-supply: Power supply used to power the domain
+- clocks: a number of phandles to clocks that need to be enabled during
+ domain power-up sequencing to ensure reset propagation into devices
+ located inside this power domain
Example:
diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c
index d84996a4528e..db74334ca5ef 100644
--- a/drivers/bus/imx-weim.c
+++ b/drivers/bus/imx-weim.c
@@ -46,6 +46,17 @@ static const struct imx_weim_devtype imx51_weim_devtype = {
};
#define MAX_CS_REGS_COUNT 6
+#define MAX_CS_COUNT 6
+#define OF_REG_SIZE 3
+
+struct cs_timing {
+ bool is_applied;
+ u32 regs[MAX_CS_REGS_COUNT];
+};
+
+struct cs_timing_state {
+ struct cs_timing cs[MAX_CS_COUNT];
+};
static const struct of_device_id weim_id_table[] = {
/* i.MX1/21 */
@@ -111,21 +122,19 @@ err:
}
/* Parse and set the timing for this device. */
-static int __init weim_timing_setup(struct device_node *np, void __iomem *base,
- const struct imx_weim_devtype *devtype)
+static int __init weim_timing_setup(struct device *dev,
+ struct device_node *np, void __iomem *base,
+ const struct imx_weim_devtype *devtype,
+ struct cs_timing_state *ts)
{
u32 cs_idx, value[MAX_CS_REGS_COUNT];
int i, ret;
+ int reg_idx, num_regs;
+ struct cs_timing *cst;
if (WARN_ON(devtype->cs_regs_count > MAX_CS_REGS_COUNT))
return -EINVAL;
-
- /* get the CS index from this child node's "reg" property. */
- ret = of_property_read_u32(np, "reg", &cs_idx);
- if (ret)
- return ret;
-
- if (cs_idx >= devtype->cs_count)
+ if (WARN_ON(devtype->cs_count > MAX_CS_COUNT))
return -EINVAL;
ret = of_property_read_u32_array(np, "fsl,weim-cs-timing",
@@ -133,9 +142,43 @@ static int __init weim_timing_setup(struct device_node *np, void __iomem *base,
if (ret)
return ret;
- /* set the timing for WEIM */
- for (i = 0; i < devtype->cs_regs_count; i++)
- writel(value[i], base + cs_idx * devtype->cs_stride + i * 4);
+ /*
+ * the child node's "reg" property may contain multiple address ranges,
+ * extract the chip select for each.
+ */
+ num_regs = of_property_count_elems_of_size(np, "reg", OF_REG_SIZE);
+ if (num_regs < 0)
+ return num_regs;
+ if (!num_regs)
+ return -EINVAL;
+ for (reg_idx = 0; reg_idx < num_regs; reg_idx++) {
+ /* get the CS index from this child node's "reg" property. */
+ ret = of_property_read_u32_index(np, "reg",
+ reg_idx * OF_REG_SIZE, &cs_idx);
+ if (ret)
+ break;
+
+ if (cs_idx >= devtype->cs_count)
+ return -EINVAL;
+
+ /* prevent re-configuring a CS that's already been configured */
+ cst = &ts->cs[cs_idx];
+ if (cst->is_applied && memcmp(value, cst->regs,
+ devtype->cs_regs_count * sizeof(u32))) {
+ dev_err(dev, "fsl,weim-cs-timing conflict on %pOF", np);
+ return -EINVAL;
+ }
+
+ /* set the timing for WEIM */
+ for (i = 0; i < devtype->cs_regs_count; i++)
+ writel(value[i],
+ base + cs_idx * devtype->cs_stride + i * 4);
+ if (!cst->is_applied) {
+ cst->is_applied = true;
+ memcpy(cst->regs, value,
+ devtype->cs_regs_count * sizeof(u32));
+ }
+ }
return 0;
}
@@ -148,6 +191,7 @@ static int __init weim_parse_dt(struct platform_device *pdev,
const struct imx_weim_devtype *devtype = of_id->data;
struct device_node *child;
int ret, have_child = 0;
+ struct cs_timing_state ts = {};
if (devtype == &imx50_weim_devtype) {
ret = imx_weim_gpr_setup(pdev);
@@ -156,7 +200,7 @@ static int __init weim_parse_dt(struct platform_device *pdev,
}
for_each_available_child_of_node(pdev->dev.of_node, child) {
- ret = weim_timing_setup(child, base, devtype);
+ ret = weim_timing_setup(&pdev->dev, child, base, devtype, &ts);
if (ret)
dev_warn(&pdev->dev, "%pOF set timing failed.\n",
child);
diff --git a/drivers/firmware/imx/misc.c b/drivers/firmware/imx/misc.c
index 97f5424dbac9..4b56a587dacd 100644
--- a/drivers/firmware/imx/misc.c
+++ b/drivers/firmware/imx/misc.c
@@ -18,6 +18,14 @@ struct imx_sc_msg_req_misc_set_ctrl {
u16 resource;
} __packed;
+struct imx_sc_msg_req_cpu_start {
+ struct imx_sc_rpc_msg hdr;
+ u32 address_hi;
+ u32 address_lo;
+ u16 resource;
+ u8 enable;
+} __packed;
+
struct imx_sc_msg_req_misc_get_ctrl {
struct imx_sc_rpc_msg hdr;
u32 ctrl;
@@ -97,3 +105,33 @@ int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
return 0;
}
EXPORT_SYMBOL(imx_sc_misc_get_control);
+
+/*
+ * This function starts/stops a CPU identified by @resource
+ *
+ * @param[in] ipc IPC handle
+ * @param[in] resource resource the control is associated with
+ * @param[in] enable true for start, false for stop
+ * @param[in] phys_addr initial instruction address to be executed
+ *
+ * @return Returns 0 for success and < 0 for errors.
+ */
+int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
+ bool enable, u64 phys_addr)
+{
+ struct imx_sc_msg_req_cpu_start msg;
+ struct imx_sc_rpc_msg *hdr = &msg.hdr;
+
+ hdr->ver = IMX_SC_RPC_VERSION;
+ hdr->svc = IMX_SC_RPC_SVC_PM;
+ hdr->func = IMX_SC_PM_FUNC_CPU_START;
+ hdr->size = 4;
+
+ msg.address_hi = phys_addr >> 32;
+ msg.address_lo = phys_addr;
+ msg.resource = resource;
+ msg.enable = enable;
+
+ return imx_scu_call_rpc(ipc, &msg, true);
+}
+EXPORT_SYMBOL(imx_sc_pm_cpu_start);
diff --git a/drivers/firmware/imx/scu-pd.c b/drivers/firmware/imx/scu-pd.c
index 407245f2efd0..39a94c7177fc 100644
--- a/drivers/firmware/imx/scu-pd.c
+++ b/drivers/firmware/imx/scu-pd.c
@@ -322,6 +322,7 @@ static int imx_sc_pd_probe(struct platform_device *pdev)
static const struct of_device_id imx_sc_pd_match[] = {
{ .compatible = "fsl,imx8qxp-scu-pd", &imx8qxp_scu_pd},
+ { .compatible = "fsl,scu-pd", &imx8qxp_scu_pd},
{ /* sentinel */ }
};
diff --git a/drivers/soc/imx/Kconfig b/drivers/soc/imx/Kconfig
index 2112d18dbb7b..d80f899d22f9 100644
--- a/drivers/soc/imx/Kconfig
+++ b/drivers/soc/imx/Kconfig
@@ -2,7 +2,7 @@ menu "i.MX SoC drivers"
config IMX_GPCV2_PM_DOMAINS
bool "i.MX GPCv2 PM domains"
- depends on SOC_IMX7D || SOC_IMX8MQ || (COMPILE_TEST && OF)
+ depends on ARCH_MXC || (COMPILE_TEST && OF)
depends on PM
select PM_GENERIC_DOMAINS
default y if SOC_IMX7D
diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index 8b4f48a2ca57..176f473127b6 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -8,6 +8,7 @@
* Copyright 2015-2017 Pengutronix, Lucas Stach <kernel@pengutronix.de>
*/
+#include <linux/clk.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
@@ -65,6 +66,12 @@
#define GPC_M4_PU_PDN_FLG 0x1bc
+#define GPC_PU_PWRHSK 0x1fc
+
+#define IMX8M_GPU_HSK_PWRDNREQN BIT(6)
+#define IMX8M_VPU_HSK_PWRDNREQN BIT(5)
+#define IMX8M_DISP_HSK_PWRDNREQN BIT(4)
+
/*
* The PGC offset values in Reference Manual
* (Rev. 1, 01/2018 and the older ones) GPC chapter's
@@ -92,16 +99,21 @@
#define GPC_PGC_CTRL_PCR BIT(0)
+#define GPC_CLK_MAX 6
+
struct imx_pgc_domain {
struct generic_pm_domain genpd;
struct regmap *regmap;
struct regulator *regulator;
+ struct clk *clk[GPC_CLK_MAX];
+ int num_clks;
unsigned int pgc;
const struct {
u32 pxx;
u32 map;
+ u32 hsk;
} bits;
const int voltage;
@@ -125,7 +137,7 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
const bool enable_power_control = !on;
const bool has_regulator = !IS_ERR(domain->regulator);
unsigned long deadline;
- int ret = 0;
+ int i, ret = 0;
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, domain->bits.map);
@@ -138,10 +150,18 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
}
}
+ /* Enable reset clocks for all devices in the domain */
+ for (i = 0; i < domain->num_clks; i++)
+ clk_prepare_enable(domain->clk[i]);
+
if (enable_power_control)
regmap_update_bits(domain->regmap, GPC_PGC_CTRL(domain->pgc),
GPC_PGC_CTRL_PCR, GPC_PGC_CTRL_PCR);
+ if (domain->bits.hsk)
+ regmap_update_bits(domain->regmap, GPC_PU_PWRHSK,
+ domain->bits.hsk, on ? domain->bits.hsk : 0);
+
regmap_update_bits(domain->regmap, offset,
domain->bits.pxx, domain->bits.pxx);
@@ -179,6 +199,10 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
regmap_update_bits(domain->regmap, GPC_PGC_CTRL(domain->pgc),
GPC_PGC_CTRL_PCR, 0);
+ /* Disable reset clocks for all devices in the domain */
+ for (i = 0; i < domain->num_clks; i++)
+ clk_disable_unprepare(domain->clk[i]);
+
if (has_regulator && !on) {
int err;
@@ -328,6 +352,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
.bits = {
.pxx = IMX8M_GPU_SW_Pxx_REQ,
.map = IMX8M_GPU_A53_DOMAIN,
+ .hsk = IMX8M_GPU_HSK_PWRDNREQN,
},
.pgc = IMX8M_PGC_GPU,
},
@@ -339,6 +364,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
.bits = {
.pxx = IMX8M_VPU_SW_Pxx_REQ,
.map = IMX8M_VPU_A53_DOMAIN,
+ .hsk = IMX8M_VPU_HSK_PWRDNREQN,
},
.pgc = IMX8M_PGC_VPU,
},
@@ -350,6 +376,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
.bits = {
.pxx = IMX8M_DISP_SW_Pxx_REQ,
.map = IMX8M_DISP_A53_DOMAIN,
+ .hsk = IMX8M_DISP_HSK_PWRDNREQN,
},
.pgc = IMX8M_PGC_DISP,
},
@@ -390,7 +417,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
static const struct regmap_range imx8m_yes_ranges[] = {
regmap_reg_range(GPC_LPCR_A_CORE_BSC,
- GPC_M4_PU_PDN_FLG),
+ GPC_PU_PWRHSK),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_MIPI),
GPC_PGC_SR(IMX8M_PGC_MIPI)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_PCIE1),
@@ -426,6 +453,41 @@ static const struct imx_pgc_domain_data imx8m_pgc_domain_data = {
.reg_access_table = &imx8m_access_table,
};
+static int imx_pgc_get_clocks(struct imx_pgc_domain *domain)
+{
+ int i, ret;
+
+ for (i = 0; ; i++) {
+ struct clk *clk = of_clk_get(domain->dev->of_node, i);
+ if (IS_ERR(clk))
+ break;
+ if (i >= GPC_CLK_MAX) {
+ dev_err(domain->dev, "more than %d clocks\n",
+ GPC_CLK_MAX);
+ ret = -EINVAL;
+ goto clk_err;
+ }
+ domain->clk[i] = clk;
+ }
+ domain->num_clks = i;
+
+ return 0;
+
+clk_err:
+ while (i--)
+ clk_put(domain->clk[i]);
+
+ return ret;
+}
+
+static void imx_pgc_put_clocks(struct imx_pgc_domain *domain)
+{
+ int i;
+
+ for (i = domain->num_clks - 1; i >= 0; i--)
+ clk_put(domain->clk[i]);
+}
+
static int imx_pgc_domain_probe(struct platform_device *pdev)
{
struct imx_pgc_domain *domain = pdev->dev.platform_data;
@@ -445,9 +507,17 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
domain->voltage, domain->voltage);
}
+ ret = imx_pgc_get_clocks(domain);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(domain->dev, "Failed to get domain's clocks\n");
+ return ret;
+ }
+
ret = pm_genpd_init(&domain->genpd, NULL, true);
if (ret) {
dev_err(domain->dev, "Failed to init power domain\n");
+ imx_pgc_put_clocks(domain);
return ret;
}
@@ -456,6 +526,7 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
if (ret) {
dev_err(domain->dev, "Failed to add genpd provider\n");
pm_genpd_remove(&domain->genpd);
+ imx_pgc_put_clocks(domain);
}
return ret;
@@ -467,6 +538,7 @@ static int imx_pgc_domain_remove(struct platform_device *pdev)
of_genpd_del_provider(domain->dev->of_node);
pm_genpd_remove(&domain->genpd);
+ imx_pgc_put_clocks(domain);
return 0;
}
diff --git a/include/linux/firmware/imx/svc/misc.h b/include/linux/firmware/imx/svc/misc.h
index e21c49aba92f..031dd4d3c766 100644
--- a/include/linux/firmware/imx/svc/misc.h
+++ b/include/linux/firmware/imx/svc/misc.h
@@ -52,4 +52,7 @@ int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
u8 ctrl, u32 *val);
+int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
+ bool enable, u64 phys_addr);
+
#endif /* _SC_MISC_API_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 21:28:54 +0100