brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

i2c: imx_lpi2c: Improve the codes to use private data

Browse Source 
Current driver calls the devfdt_get_addr to get the base address
of lpi2c controller in each sub-functions. Since the devfdt_get_addr
accesses the DTB and translate the address, it introduces much
overhead.
Improve the codes to use private variable which has recorded the
base address from probe.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2020-06-09 20:29:50 -07:00 committed by Heiko Schocher
parent 44ad59e695
commit 35d3982e23
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/i2c/imx_lpi2c.c
View File

@ -97,7 +97,8 @@ static int bus_i2c_wait_for_tx_ready(struct imx_lpi2c_reg *regs)
static int bus_i2c_send(struct udevice *bus, u8 *txbuf, int len)
{
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)devfdt_get_addr(bus);
struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus);
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)(i2c_bus->base);
lpi2c_status_t result = LPI2C_SUCESS;
/* empty tx */
@ -118,7 +119,8 @@ static int bus_i2c_send(struct udevice *bus, u8 *txbuf, int len)
static int bus_i2c_receive(struct udevice *bus, u8 *rxbuf, int len)
{
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)devfdt_get_addr(bus);
struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus);
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)(i2c_bus->base);
lpi2c_status_t result = LPI2C_SUCESS;
u32 val;
ulong start_time = get_timer(0);
@ -162,8 +164,8 @@ static int bus_i2c_receive(struct udevice *bus, u8 *rxbuf, int len)
static int bus_i2c_start(struct udevice *bus, u8 addr, u8 dir)
{
lpi2c_status_t result;
struct imx_lpi2c_reg *regs =
(struct imx_lpi2c_reg *)devfdt_get_addr(bus);
struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus);
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)(i2c_bus->base);
u32 val;
result = imx_lpci2c_check_busy_bus(regs);
@ -199,8 +201,8 @@ static int bus_i2c_start(struct udevice *bus, u8 addr, u8 dir)
static int bus_i2c_stop(struct udevice *bus)
{
lpi2c_status_t result;
struct imx_lpi2c_reg *regs =
(struct imx_lpi2c_reg *)devfdt_get_addr(bus);
struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus);
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)(i2c_bus->base);
u32 status;
ulong start_time;
@ -271,7 +273,7 @@ u32 __weak imx_get_i2cclk(u32 i2c_num)
static int bus_i2c_set_bus_speed(struct udevice *bus, int speed)
{
struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus);
struct imx_lpi2c_reg *regs;
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)(i2c_bus->base);
u32 val;
u32 preescale = 0, best_pre = 0, clkhi = 0;
u32 best_clkhi = 0, abs_error = 0, rate;
@ -280,8 +282,6 @@ static int bus_i2c_set_bus_speed(struct udevice *bus, int speed)
bool mode;
int i;
regs = (struct imx_lpi2c_reg *)devfdt_get_addr(bus);
if (IS_ENABLED(CONFIG_CLK)) {
clock_rate = clk_get_rate(&i2c_bus->per_clk);
if (clock_rate <= 0) {
@ -348,11 +348,11 @@ static int bus_i2c_set_bus_speed(struct udevice *bus, int speed)
static int bus_i2c_init(struct udevice *bus, int speed)
{
struct imx_lpi2c_reg *regs;
u32 val;
int ret;
regs = (struct imx_lpi2c_reg *)devfdt_get_addr(bus);
struct imx_lpi2c_bus *i2c_bus = dev_get_priv(bus);
struct imx_lpi2c_reg *regs = (struct imx_lpi2c_reg *)(i2c_bus->base);
/* reset peripheral */
writel(LPI2C_MCR_RST_MASK, &regs->mcr);
writel(0x0, &regs->mcr);