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Subject[PATCHv6 18/28] PCI: mobiveil: Remove redundant var definitions and register read operations
Date
From the function program_ob_windows(), remove the redundant read
operations to registers PAB_AXI_AMAP_AXI_WIN and PAB_AXI_AMAP_PEX_WIN_H,
and remove the useless definition of 'value'. Rename the parameter
'config_io_bit' to 'type' and then remove the definition of 'type'.
From the function program_ib_windows(), remove the definitions of
'pio_ctrl_val' and 'amap_ctrl_dw' and reduce to only one var 'value'
to keep the temporary value read from registers.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
---
V6:
- Splited from #9 of v5 patches, no functional change.

drivers/pci/controller/pcie-mobiveil.c | 25 ++++++++-----------------
1 files changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index ddc20d3..ccf9bb1 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -455,8 +455,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
int pci_addr, u32 type, u64 size)
{
- int pio_ctrl_val;
- int amap_ctrl_dw;
+ u32 value;
u64 size64 = ~(size - 1);

if ((pcie->ib_wins_configured + 1) > pcie->ppio_wins) {
@@ -465,15 +464,15 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
return;
}

- pio_ctrl_val = csr_readl(pcie, PAB_PEX_PIO_CTRL);
- pio_ctrl_val |= 1 << PIO_ENABLE_SHIFT;
- csr_writel(pcie, pio_ctrl_val, PAB_PEX_PIO_CTRL);
+ value = csr_readl(pcie, PAB_PEX_PIO_CTRL);
+ value |= 1 << PIO_ENABLE_SHIFT;
+ csr_writel(pcie, value, PAB_PEX_PIO_CTRL);

- amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
- amap_ctrl_dw |= (type << AMAP_CTRL_TYPE_SHIFT) |
+ value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
+ value |= (type << AMAP_CTRL_TYPE_SHIFT) |
(1 << AMAP_CTRL_EN_SHIFT) |
lower_32_bits(size64);
- csr_writel(pcie, amap_ctrl_dw, PAB_PEX_AMAP_CTRL(win_num));
+ csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));

csr_writel(pcie, upper_32_bits(size64),
PAB_EXT_PEX_AMAP_SIZEN(win_num));
@@ -488,11 +487,8 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
* routine to program the outbound windows
*/
static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
- u64 cpu_addr, u64 pci_addr,
- u32 config_io_bit, u64 size)
+ u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
{
-
- u32 value, type;
u64 size64 = ~(size - 1);

if ((pcie->ob_wins_configured + 1) > pcie->apio_wins) {
@@ -505,8 +501,6 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
* program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
* to 4 KB in PAB_AXI_AMAP_CTRL register
*/
- type = config_io_bit;
- value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num));

@@ -516,12 +510,9 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
* program AXI window base with appropriate value in
* PAB_AXI_AMAP_AXI_WIN0 register
*/
- value = csr_readl(pcie, PAB_AXI_AMAP_AXI_WIN(win_num));
csr_writel(pcie, cpu_addr & (~AXI_WINDOW_ALIGN_MASK),
PAB_AXI_AMAP_AXI_WIN(win_num));

- value = csr_readl(pcie, PAB_AXI_AMAP_PEX_WIN_H(win_num));
-
csr_writel(pcie, lower_32_bits(pci_addr),
PAB_AXI_AMAP_PEX_WIN_L(win_num));
csr_writel(pcie, upper_32_bits(pci_addr),
--
1.7.1
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