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clk: zynqmp: Add support to enable clocks

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Add clock enable functionality in zynqmp clock driver to enable
clocks from peripheral drivers using clk_ops.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
T Karthik Reddy 2021-02-03 03:10:45 -07:00 committed by Michal Simek
parent 9b7aac7536
commit a72a6ae362
1 changed files with 49 additions and 0 deletions
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49
drivers/clk/clk_zynqmp.c
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@ -199,6 +199,8 @@ static u32 zynqmp_clk_get_register(enum zynqmp_clk id)
return CRF_APB_DDR_CTRL;
case qspi_ref:
return CRL_APB_QSPI_REF_CTRL;
case usb3_dual_ref:
return CRL_APB_USB3_DUAL_REF_CTRL;
case gem0_ref:
return CRL_APB_GEM0_REF_CTRL;
case gem1_ref:
@ -207,6 +209,10 @@ static u32 zynqmp_clk_get_register(enum zynqmp_clk id)
return CRL_APB_GEM2_REF_CTRL;
case gem3_ref:
return CRL_APB_GEM3_REF_CTRL;
case usb0_bus_ref:
return CRL_APB_USB0_BUS_REF_CTRL;
case usb1_bus_ref:
return CRL_APB_USB1_BUS_REF_CTRL;
case uart0_ref:
return CRL_APB_UART0_REF_CTRL;
case uart1_ref:
@ -699,9 +705,52 @@ static int zynqmp_clk_probe(struct udevice *dev)
return 0;
}
static int zynqmp_clk_enable(struct clk *clk)
{
enum zynqmp_clk id = clk->id;
u32 reg, clk_ctrl, clkact_shift, mask;
int ret;
reg = zynqmp_clk_get_register(id);
debug("%s, clk_id:%x, clk_base:0x%x\n", __func__, id, reg);
switch (id) {
case usb0_bus_ref ... usb1:
clkact_shift = 25;
mask = 0x1;
break;
case gem0_ref ... gem3_ref:
clkact_shift = 25;
mask = 0x3;
break;
case qspi_ref ... can1_ref:
clkact_shift = 24;
mask = 0x1;
break;
default:
return -ENXIO;
}
ret = zynqmp_mmio_read(reg, &clk_ctrl);
if (ret) {
printf("%s mio read fail\n", __func__);
return -EIO;
}
clk_ctrl |= (mask << clkact_shift);
ret = zynqmp_mmio_write(reg, mask << clkact_shift, clk_ctrl);
if (ret) {
printf("%s mio write fail\n", __func__);
return -EIO;
}
return ret;
}
static struct clk_ops zynqmp_clk_ops = {
.set_rate = zynqmp_clk_set_rate,
.get_rate = zynqmp_clk_get_rate,
.enable = zynqmp_clk_enable,
};
static const struct udevice_id zynqmp_clk_ids[] = {