tty: serial: lpuart: add power domain support
lpuart dma mode depends on dma channel's power domain like: power-domains = <&pd IMX_SC_R_UART_1>, <&pd IMX_SC_R_DMA_2_CH10>, <&pd IMX_SC_R_DMA_2_CH11>; power-domain-names = "uart", "rxdma", "txdma"; So define the multiple power domain for lpuart. Signed-off-by: Fugang Duan <fugang.duan@nxp.com>5.4-rM2-2.2.x-imx-squashed
parent
8ee7d8348e
commit
db08d5739e
|
@ -20,6 +20,8 @@
|
||||||
#include <linux/of.h>
|
#include <linux/of.h>
|
||||||
#include <linux/of_device.h>
|
#include <linux/of_device.h>
|
||||||
#include <linux/of_dma.h>
|
#include <linux/of_dma.h>
|
||||||
|
#include <linux/pm_domain.h>
|
||||||
|
#include <linux/pm_runtime.h>
|
||||||
#include <linux/serial_core.h>
|
#include <linux/serial_core.h>
|
||||||
#include <linux/slab.h>
|
#include <linux/slab.h>
|
||||||
#include <linux/tty_flip.h>
|
#include <linux/tty_flip.h>
|
||||||
|
@ -2368,6 +2370,54 @@ static struct uart_driver lpuart_reg = {
|
||||||
.cons = LPUART_CONSOLE,
|
.cons = LPUART_CONSOLE,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
static int lpuart_attach_pd(struct device *dev)
|
||||||
|
{
|
||||||
|
struct device *pd_uart;
|
||||||
|
struct device *pd_txdma, *pd_rxdma;
|
||||||
|
struct device_link *link;
|
||||||
|
|
||||||
|
if (dev->pm_domain)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
pd_uart = dev_pm_domain_attach_by_name(dev, "uart");
|
||||||
|
if (IS_ERR(pd_uart))
|
||||||
|
return PTR_ERR(pd_uart);
|
||||||
|
link = device_link_add(dev, pd_uart, DL_FLAG_STATELESS |
|
||||||
|
DL_FLAG_PM_RUNTIME |
|
||||||
|
DL_FLAG_RPM_ACTIVE);
|
||||||
|
if (IS_ERR(link)) {
|
||||||
|
dev_err(dev, "Failed to add device_link to uart pd: %ld\n",
|
||||||
|
PTR_ERR(link));
|
||||||
|
return PTR_ERR(link);
|
||||||
|
}
|
||||||
|
|
||||||
|
pd_txdma = dev_pm_domain_attach_by_name(dev, "txdma");
|
||||||
|
if (IS_ERR(pd_txdma))
|
||||||
|
return PTR_ERR(pd_txdma);
|
||||||
|
link = device_link_add(dev, pd_txdma, DL_FLAG_STATELESS |
|
||||||
|
DL_FLAG_PM_RUNTIME |
|
||||||
|
DL_FLAG_RPM_ACTIVE);
|
||||||
|
if (IS_ERR(link)) {
|
||||||
|
dev_err(dev, "Failed to add device_link to uart pd: %ld\n",
|
||||||
|
PTR_ERR(link));
|
||||||
|
return PTR_ERR(link);
|
||||||
|
}
|
||||||
|
|
||||||
|
pd_rxdma = dev_pm_domain_attach_by_name(dev, "rxdma");
|
||||||
|
if (IS_ERR(pd_rxdma))
|
||||||
|
return PTR_ERR(pd_rxdma);
|
||||||
|
link = device_link_add(dev, pd_rxdma, DL_FLAG_STATELESS |
|
||||||
|
DL_FLAG_PM_RUNTIME |
|
||||||
|
DL_FLAG_RPM_ACTIVE);
|
||||||
|
if (IS_ERR(link)) {
|
||||||
|
dev_err(dev, "Failed to add device_link to uart pd: %ld\n",
|
||||||
|
PTR_ERR(link));
|
||||||
|
return PTR_ERR(link);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
static int lpuart_probe(struct platform_device *pdev)
|
static int lpuart_probe(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
const struct of_device_id *of_id = of_match_device(lpuart_dt_ids,
|
const struct of_device_id *of_id = of_match_device(lpuart_dt_ids,
|
||||||
|
@ -2418,6 +2468,10 @@ static int lpuart_probe(struct platform_device *pdev)
|
||||||
|
|
||||||
sport->port.rs485_config = lpuart_config_rs485;
|
sport->port.rs485_config = lpuart_config_rs485;
|
||||||
|
|
||||||
|
ret = lpuart_attach_pd(&pdev->dev);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
sport->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
|
sport->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
|
||||||
if (IS_ERR(sport->ipg_clk)) {
|
if (IS_ERR(sport->ipg_clk)) {
|
||||||
ret = PTR_ERR(sport->ipg_clk);
|
ret = PTR_ERR(sport->ipg_clk);
|
||||||
|
|
Loading…
Reference in New Issue