linux/drivers/usb/renesas_usbhs/rza.c
Yoshihiro Shimoda 76eff170bb usb: renesas_usbhs: Use renesas_usbhs_platform_info on of_device_id.data
In device tree environment, the previous code allocates
renesas_usbhs_platform_info by using devm_kzalloc() and then copies
usbhs_of_data to the allocated memory. This reason is some values
(e.g. .platform_callback.get_vbus) are overwritten by the driver,
but the of_device_id.data is "const". Now the driver doesn't have
such a code, so this patch uses renesas_usbhs_platform_info on
of_device_id.data.

Note that the previous code set the pdev->dev.platform_data pointer
even if device tree environment, but the value is not used. So,
this patch also remove such a code.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-26 10:33:09 +08:00

53 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Renesas USB driver RZ/A initialization and power control
*
* Copyright (C) 2018 Chris Brandt
* Copyright (C) 2018-2019 Renesas Electronics Corporation
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/of_device.h>
#include "common.h"
#include "rza.h"
static int usbhs_rza1_hardware_init(struct platform_device *pdev)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
struct device_node *usb_x1_clk, *extal_clk;
u32 freq_usb = 0, freq_extal = 0;
/* Input Clock Selection (NOTE: ch0 controls both ch0 and ch1) */
usb_x1_clk = of_find_node_by_name(NULL, "usb_x1");
extal_clk = of_find_node_by_name(NULL, "extal");
of_property_read_u32(usb_x1_clk, "clock-frequency", &freq_usb);
of_property_read_u32(extal_clk, "clock-frequency", &freq_extal);
if (freq_usb == 0) {
if (freq_extal == 12000000) {
/* Select 12MHz XTAL */
usbhs_bset(priv, SYSCFG, UCKSEL, UCKSEL);
} else {
dev_err(usbhs_priv_to_dev(priv), "A 48MHz USB clock or 12MHz main clock is required.\n");
return -EIO;
}
}
/* Enable USB PLL (NOTE: ch0 controls both ch0 and ch1) */
usbhs_bset(priv, SYSCFG, UPLLE, UPLLE);
usleep_range(1000, 2000);
usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM);
return 0;
}
const struct renesas_usbhs_platform_info usbhs_rza1_plat_info = {
.platform_callback = {
.hardware_init = usbhs_rza1_hardware_init,
.get_id = usbhs_get_id_as_gadget,
},
.driver_param = {
.has_new_pipe_configs = 1,
},
};